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15 pages, 8125 KiB

Open AccessArticle

High Genetic Diversity of Hirudo verbana Carena, 1820 (Annelida: Hirudinea: Hirudinidae) in Romania Confirms That the Balkans Are Refugia Within Refugium

by Oana Paula Popa, Andrei Ștefan, Emanuel Ștefan Baltag, Ana Alexandra Stratan, Luis Ovidiu Popa and Victor Surugiu

Diversity 2024, 16(12), 726; https://doi.org/10.3390/d16120726 - 26 Nov 2024

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Abstract

This study presents the first data on the distribution of the Mediterranean medicinal leech Hirudo verbana in Romania, as well as the first molecular characterization of the Romanian populations, using mitochondrial DNA markers. In total, 133 specimens from 19 populations in Romania were [...] Read more.

This study presents the first data on the distribution of the Mediterranean medicinal leech Hirudo verbana in Romania, as well as the first molecular characterization of the Romanian populations, using mitochondrial DNA markers. In total, 133 specimens from 19 populations in Romania were surveyed for mitochondrial COI and 12S markers. Available GenBank sequences from other localities throughout Europe were included to place the Romanian populations in a broader phylogeographical context. The Romanian H. verbana samples belong to 23 COI haplotypes, 4 of which are previously known from Serbia and Ukraine, while 19 haplotypes are herein reported for the first time. For 12S, the number of haplotypes identified was 12, from which only 5 are unique to Romania. The Romanian H. verbana cluster within the previously reported eastern phylogroup, known to occur from Serbia to North Caucasus, Turkey, and Uzbekistan. The mismatch distribution analysis and the results of neutrality tests suggest that the Romanian H. verbana currently undergoes a population dispersal. This study also revealed that the lower Danube basin is a hotspot of genetic diversity of H. verbana, where different lineages from the Balkan and Anatolian glacial refugia mixed in the postglacial period. Species Distribution Models (SDMs) indicated that the main ecological variables influencing the current distribution of H. verbana are wetland coverage and elevation. Following the IUCN Red List categories and criteria, the present conservation status of the Mediterranean medicinal leech H. verbana in Romania was assessed as Vulnerable (VU). Our study contributes towards a more refined understanding of the genetic diversity of H. verbana and of the factors that led to its current geographical distribution in Romania and Europe. Full article

(This article belongs to the Special Issue Diversity in 2024)

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16 pages, 12044 KiB

Open AccessArticle

Integrative Systematics Reveals Cryptic Diversity in Paraphrynus Whip Spiders (Amblypygi: Phrynidae) from Southwestern North America

by Nicolas Cazzaniga and Lorenzo Prendini

Diversity 2024, 16(11), 669; https://doi.org/10.3390/d16110669 - 30 Oct 2024

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Abstract

Due to their continuous growth, reclusive nature, and low vagility, the distributions and species limits of many whip spiders (Amblypygi Thorell, 1883) remain poorly understood, and much cryptic diversity remains unrecognized. Past attempts to separate the historical “forms” of Paraphrynus Moreno, 1940 into [...] Read more.

Due to their continuous growth, reclusive nature, and low vagility, the distributions and species limits of many whip spiders (Amblypygi Thorell, 1883) remain poorly understood, and much cryptic diversity remains unrecognized. Past attempts to separate the historical “forms” of Paraphrynus Moreno, 1940 into morphologically diagnosable species resulted, for example, in the division of Paraphrynus mexicanus (Bilimek, 1867) into three species—the nominotypical form, Paraphrynus cubensis Quintero, 1983, and Paraphrynus carolynae Armas, 2012. Nevertheless, the limitations of conservative morphology continue to hinder progress towards clarifying the diversity of Paraphrynus. One such example concerns P. carolynae, distributed from Arizona to central Mexico as currently defined. Through the acquisition of new, freshly collected material, the discovery of novel morphological characters, and molecular systematics analyses, it became apparent that P. carolynae comprises at least two morphologically diagnosable species. In this present contribution, the northernmost population of P. carolynae occurring in Arizona and California is described as a new species, Paraphrynus tokdod, sp. nov., raising the number of species in the genus to 22. This investigation also revealed more variation than expected in the secondary spine counts of the pedipalps and the trichobothrial counts of leg IV, previously used for species delimitation in Paraphrynus, suggesting that such characters should be used with caution. Full article

(This article belongs to the Special Issue Diversity in 2024)

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18 pages, 1028 KiB

Open AccessArticle

Structure of Reef Fish Families (Butterflyfishes and Angelfishes) at Isolated Oceanic Reefs in the Indian Ocean: Christmas Island and the Cocos (Keeling) Islands

by Jean-Paul A. Hobbs and Maya Srinivasan

Diversity 2024, 16(9), 569; https://doi.org/10.3390/d16090569 - 12 Sep 2024

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Abstract

There has been substantial research on the factors that structure reef fish assemblages, but this has mostly focused on nearshore or continental reefs. This study examines patterns of abundance and species composition for two iconic groups of coral reef fishes, angelfishes (family Pomacanthidae) [...] Read more.

There has been substantial research on the factors that structure reef fish assemblages, but this has mostly focused on nearshore or continental reefs. This study examines patterns of abundance and species composition for two iconic groups of coral reef fishes, angelfishes (family Pomacanthidae) and butterflyfishes (family Chaetodontidae) at two isolated, oceanic reefs in the Indian Ocean: Christmas Island and the Cocos (Keeling) Islands. Six explanatory variables were investigated to determine whether large-scale physical factors are more important than fine-scale biotic factors in structuring reef fish communities on oceanic islands. For angelfishes, depth was the factor that most explained patterns in abundance (explaining 46.5% of the variation), species richness (44.8%) and composition (15.3%), with both abundance and species richness being greater at 20 m than at 5 m. Differences in species composition were greater between depths than between islands. For butterflyfishes, variation in abundance and species richness was best explained by the difference in aspect or exposure among sites, though abundance and composition also differed significantly between Christmas Island and the Cocos (Keeling) Islands. Large-scale variation in the structure of these reef fish assemblages could not be explained based on differences in habitat diversity, or coral and algal cover. This study indicates that large-scale physical factors (island location, exposure, depth) are more important than fine-scale biotic factors in structuring reef fish assemblages on oceanic islands. Full article

(This article belongs to the Special Issue Diversity in 2024)

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16 pages, 1506 KiB

Open AccessArticle

Temporal Changes in Bank Vole Populations Indicate Species Decline

by Linas Balčiauskas, Marius Jasiulionis, Vitalijus Stirkė and Laima Balčiauskienė

Diversity 2024, 16(9), 546; https://doi.org/10.3390/d16090546 - 4 Sep 2024

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Abstract

Because of their wide distribution, short life cycle, rapid reproduction, and sensitivity to the environment, rodents can indicate changes in habitat quality and climate variables. Long-term studies are needed to verify these changes and assumptions about their causes. We analyzed small mammal trapping [...] Read more.

Because of their wide distribution, short life cycle, rapid reproduction, and sensitivity to the environment, rodents can indicate changes in habitat quality and climate variables. Long-term studies are needed to verify these changes and assumptions about their causes. We analyzed small mammal trapping data in Lithuania, covering the period 1975–2023, with 1821 trapping sites and 57,426 small mammal individuals, with a focus on the bank vole (Clethrionomys glareolus). The aim of this study was to assess temporal changes in the relative abundance and proportion of this species in small mammal communities in relation to their habitats. With 21,736 captured individuals, C. glareolus was a dominant species in the country; its proportion in general was 37.9%, with 60.0% in forests. Open habitats, meadows and agricultural land were characterized by the lowest species proportions. Our main findings were the confirmation of decreasing abundances and proportions of C. glareolus since the 1990s, the absence of cyclical fluctuations in the relative abundances of the species in general and in forest habitats, and the introduction of a south–north cline in species proportions. The status of this temperate and boreal forest species is subject to change, with implications for the diversity of the mid-latitude small mammal community. Full article

(This article belongs to the Special Issue Diversity in 2024)

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30 pages, 40285 KiB

Open AccessArticle

Coahuilasaurus lipani, a New Kritosaurin Hadrosaurid from the Upper Campanian Cerro Del Pueblo Formation, Northern Mexico

by Nicholas R. Longrich, Angel Alejandro Ramirez Velasco, Jim Kirkland, Andrés Eduardo Bermúdez Torres and Claudia Inés Serrano-Brañas

Diversity 2024, 16(9), 531; https://doi.org/10.3390/d16090531 - 1 Sep 2024

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Abstract

The Late Cretaceous of Western North America (Laramidia) supported a diverse dinosaur fauna, with duckbilled dinosaurs (Hadrosauridae) being among the most speciose and abundant members of this assemblage. Historically, collecting and preservational biases have meant that dinosaurs from Mexico and the American Southwest [...] Read more.

The Late Cretaceous of Western North America (Laramidia) supported a diverse dinosaur fauna, with duckbilled dinosaurs (Hadrosauridae) being among the most speciose and abundant members of this assemblage. Historically, collecting and preservational biases have meant that dinosaurs from Mexico and the American Southwest are poorly known compared to those of the northern Great Plains. However, evidence increasingly suggests that distinct species and clades inhabited southern Laramidia. Here, a new kritosaurin hadrosaurid, represented by the anterior part of a skull, is reported from the late Campanian of the Cerro del Pueblo Formation, ~72.5 Ma, in Coahuila, Mexico. The Cerro del Pueblo Formation kritosaur was originally considered to represent the same species as a saurolophine from the Olmos Formation of Sabinas, but the Sabinas hadrosaur is now considered a distinct taxon. More recently, the Cerro del Pueblo Formation kritosaur has been referred to Kritosaurus navajovius. We show it represents a new species related to Gryposaurus. The new species is distinguished by its large size, the shape of the premaxillary nasal process, the strongly downturned dentary, and massive denticles on the premaxilla’s palatal surface, supporting recognition of a new taxon, Coahuilasaurus lipani. The dinosaur assemblage of the Cerro del Pueblo Formation shows higher diversity than the contemporaneous fauna of the Horseshoe Canyon Formation in Alberta. Furthermore, Kritosaurini, Lambeosaurini, and Parasaurolophini all persist into the latest Campanian in southern Laramidia after disappearing from northern Laramidia. These patterns suggest declining herbivore diversity seen at high latitudes may be a local, rather than global phenomenon, perhaps driven by cooling at high latitudes in the Late Campanian and Maastrichtian. Full article

(This article belongs to the Special Issue Diversity in 2024)

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17 pages, 2852 KiB

Open AccessArticle

Flourishing in Darkness: Protist Communities of Water Sites in Shulgan-Tash Cave (Southern Urals, Russia)

by Natalia E. Gogoleva, Marina A. Nasyrova, Alexander S. Balkin, Olga Ya. Chervyatsova, Lyudmila Yu. Kuzmina, Elena I. Shagimardanova, Yuri V. Gogolev and Andrey O. Plotnikov

Diversity 2024, 16(9), 526; https://doi.org/10.3390/d16090526 - 1 Sep 2024

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Abstract

Karst caves, formed by the erosion of soluble carbonate rocks, provide unique ecosystems characterized by stable temperatures and high humidity. These conditions support diverse microbial communities, including wall microbial fouling, aquatic biofilms, and planktonic communities. This study discloses the taxonomic diversity of protists [...] Read more.

Karst caves, formed by the erosion of soluble carbonate rocks, provide unique ecosystems characterized by stable temperatures and high humidity. These conditions support diverse microbial communities, including wall microbial fouling, aquatic biofilms, and planktonic communities. This study discloses the taxonomic diversity of protists in aquatic biotopes of Shulgan-Tash Cave, a culturally significant site and popular tourist destination, by 18S rRNA gene metabarcoding. Our findings reveal the rich protist communities in the cave’s aquatic biotopes, with the highest diversity observed in Blue Lake at the cave entrance. In contrast, Distant Lake in the depth of the cave was inhabited by specific communities of plankton, mats, and pool fingers, which exhibited lower richness and evenness, and were adapted to extreme conditions (cold, darkness, and limited nutrients). High-rank taxa including Opisthokonta, Stramenopiles, and Rhizaria dominated all biotopes, aligning with observations from other subterranean environments. Specific communities of biotopes inside the cave featured distinct dominant taxa: amoeboid stramenopile (Synchromophyceae) and flagellates (Choanoflagellatea and Sandona) in mats; flagellates (Choanoflagellatea, Bicoecaceae, Ancyromonadida) and amoeboid protists (Filasterea) in pool fingers; flagellates (Ochromonadales, Glissomonadida, Synchromophyceae), fungi-like protists (Peronosporomycetes), and fungi (Ustilaginomycotina) in plankton. The specificity of the communities was supported by LEfSe analysis, which revealed enriched or differentially abundant protist taxa in each type of biotope. The predominance of Choanoflagellatea in the communities of cave mats and pool fingers, as well as the predominance of Synchromophyceae in the cave mats, appears to be a unique feature of Shulgan-Tash Cave. The cold-tolerant yeast Malassezia recorded in other caves was present in both plankton and biofilm communities, suggesting its resilience to low temperatures. However, no potentially harmful fungi were detected, positioning this research as a baseline for future monitoring. Our results emphasize the need for ongoing surveillance and conservation efforts to protect the fragile ecosystems of Shulgan-Tash Cave from human-induced disturbances and microbial invasions. Full article

(This article belongs to the Special Issue Diversity in 2024)

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11 pages, 4586 KiB

Open AccessArticle

Molecular Phylogeny and Historical Biogeography of Byrsonima (Malpighiaceae) Corroborates the Mid-Miocene Origins of Neotropical Savannas

by Rafael Felipe de Almeida, Augusto Francener, Maria Candida Henrique Mamede and Cássio van den Berg

Diversity 2024, 16(8), 488; https://doi.org/10.3390/d16080488 - 10 Aug 2024

Cited by 1 | Viewed by 1084

Abstract

We present a dated and calibrated molecular phylogeny for one of the most characteristic genera of Neotropical savannas, Byrsonima (Malpighiaceae), based on the ETS, ITS, and psbA-trnH markers. We sampled 33 species of Byrsonima and four species of the outgroups Blepharandra, Diacidia, [...] Read more.

We present a dated and calibrated molecular phylogeny for one of the most characteristic genera of Neotropical savannas, Byrsonima (Malpighiaceae), based on the ETS, ITS, and psbA-trnH markers. We sampled 33 species of Byrsonima and four species of the outgroups Blepharandra, Diacidia, and Pterandra to test the monophyly of the infrageneric classification of the genus. Bayesian inference (BI) analysis was performed for the combined molecular dataset. Seven morphological characters were optimized on the obtained tree. Calibration points derived from a published chronogram for Malpighiaceae were used alongside a relaxed, uncorrelated molecular clock on Beast 1.8.4. Ancestral range reconstructions focusing on four main Neotropical biomes (Cerrado, Atlantic rainforest, Amazon rainforest, and Caatinga dry forests) were performed on BioGeoBEARS. Our phylogenetic results corroborated the monophyly of Byrsonima, but all of its subgenera and sections were polyphyletic, with all morphological characters circumscribing these infrageneric ranks being highly homoplastic. The most recent common ancestor of Byrsonima was widespread in South American biomes at 11.41 Ma, posteriorly diversifying in the Amazon rainforests up to 7.72 Ma, when it started massively diversifying in Neotropical savannas. A few re-colonization events from savannas to rain or dry forests occurred from 2.95–0.53 Ma. These results corroborate the mid-Miocene origins of Neotropical savannas, and future studies should aim to sample Mesoamerican species of Byrsonima. Full article

(This article belongs to the Special Issue Diversity in 2024)

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14 pages, 3282 KiB

Open AccessArticle

Comparative Assessment of Shell Structural, Mechanical, and Elemental Properties in Adult Acorn Barnacles

by Jazmine Shaw, Yeram Kang, Callie Triano, Corin J. Hoppe, Nick Aldred, Rebecca A. Metzler and Gary H. Dickinson

Diversity 2024, 16(8), 482; https://doi.org/10.3390/d16080482 - 8 Aug 2024

Viewed by 1056

Abstract

Balanomorph (acorn) barnacles are found throughout the world’s coastal oceans, and their success is dependent on a hard, mineralized, outer shell. Although macro-scale morphology of barnacle shells has been studied extensively, relatively little is known about shell properties at the micron-scale and if [...] Read more.

Balanomorph (acorn) barnacles are found throughout the world’s coastal oceans, and their success is dependent on a hard, mineralized, outer shell. Although macro-scale morphology of barnacle shells has been studied extensively, relatively little is known about shell properties at the micron-scale and if such properties vary among species. We assessed shell structure, mechanics, and composition in seven species of balanomorph barnacles from five genera. Three species, Amphibalanus amphitrite, Amphibalanus improvisus, and Austrominius modestus, were laboratory-reared, enabling direct comparison of shell properties of barnacles grown under the same conditions for the same duration. Four other species, Semibalanus balanoides, Amphibalanus eburneus, Chthamalus stellatus, and Tetraclita rubescens, were field-collected. At the macro- and meso-scales, shell properties varied markedly among species, with differences in the number of shell plates, the presence of canals within the plates, mineralization of the base, and shell plate thickness. At the micron-scale, however, structure was remarkably similar among species. Plates of all species were constructed of irregular micron-scale crystallites, with a broad range of crystallite dimensions observed within the same shell. Similarly, micromechanical properties did not vary among species, regardless of testing orientation. Calcium carbonate was identified as calcite in all species assessed with no other mineral phases present, and calcium content did not vary among species. Hence, despite variation in the overall macro- and meso-scale morphology of barnacles, all appear to be built using the same, evolutionarily conserved, mineralization pathway. Full article

(This article belongs to the Special Issue Diversity in 2024)

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22 pages, 2353 KiB

Open AccessArticle

Finding Isolated Aquatic Habitat: Can Beggars Be Choosers?

by Danielle M. Husband and Nancy E. McIntyre

Diversity 2024, 16(8), 468; https://doi.org/10.3390/d16080468 - 3 Aug 2024

Viewed by 1459

Abstract

In a two-year field study across 58 isolated wetlands in Texas (USA), we examined whether odonate (Insecta: Odonata) assemblages were structured by local environmental filters or instead simply reflected the use of any available water in this semi-arid region. Cluster analysis resolved three [...] Read more.

In a two-year field study across 58 isolated wetlands in Texas (USA), we examined whether odonate (Insecta: Odonata) assemblages were structured by local environmental filters or instead simply reflected the use of any available water in this semi-arid region. Cluster analysis resolved three wetland groupings based on environmental characteristics (hydroperiod, water chemistry, vegetation); 37 odonate species were detected at these wetlands. The most speciose assemblages occurred at wetlands with longer hydroperiods; these sites also had the most species found at no other wetland type. Ordination plots indicated some filtering with respect to the hydroperiod, but there was only mixed or weak support with respect to other local factors. Because water persistence was the strongest driver maintaining odonate diversity in this region, regardless of water quality or vegetation, beggars cannot be choosers in this system and conservation efforts can focus on water maintenance or supplementation. Full article

(This article belongs to the Special Issue Diversity in 2024)

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16 pages, 1574 KiB

Open AccessArticle

Linking Perceived Biodiversity and Restorative Benefits in Urban Parks through Place Attachment—A Case Study in Fuzhou, China

by Jingru Chen, Binsheng Wu, Kunli Dai and Jiao Yu

Diversity 2024, 16(7), 416; https://doi.org/10.3390/d16070416 - 18 Jul 2024

Cited by 1 | Viewed by 861

Abstract

Enhanced understanding of environmental restoration can be achieved by examining how urban park visitors’ perceptions of biodiversity contribute to their sense of environmental rejuvenation. In this study, a questionnaire survey was conducted among 554 visitors from five representative urban parks in Fuzhou, China, [...] Read more.

Enhanced understanding of environmental restoration can be achieved by examining how urban park visitors’ perceptions of biodiversity contribute to their sense of environmental rejuvenation. In this study, a questionnaire survey was conducted among 554 visitors from five representative urban parks in Fuzhou, China, and a structural equation model was used to explore the interactions among perceived biodiversity, place attachment, and self-rated repair. The main findings were as follows: (1) Perceived biodiversity had significant positive and direct effects on place dependence and self-rated restoration, but not on place identity. It is worth noting that place dependence has a deep and direct impact on place identity. (2) Self-rated restoration could be directly influenced by perceived biodiversity and place dependence. The direct impact of perceived biodiversity showed more intensity than place dependence. (3) Place dependence can be the only intermediary or link in the chain between perceived biodiversity and self-rated restoration. Conversely, place identity may not act as an independent intermediary but can play a key role in the chain of intermediaries. The study not only advances our understanding of the complex relationship between perceived biodiversity, place attachment, and self-assessed restoration; it also provides practical implications for urban green eco-design initiatives, thereby contributing to the field of urban landscape planning and formulation. Full article

(This article belongs to the Special Issue Diversity in 2024)

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27 pages, 5406 KiB

Open AccessEditor’s ChoiceArticle

Rock Surface Colonization by Groundwater Microorganisms in an Aquifer System in Quebec, Canada

by Divya Patel, Vincent Blouin, Jamie Kirkpatrick and Cassandre Sara Lazar

Diversity 2024, 16(7), 374; https://doi.org/10.3390/d16070374 - 28 Jun 2024

Viewed by 5043

Abstract

Aquifers are rich in microbial diversity. However, there is a lack of information about sessile communities in these environments because of the difficulty in sampling fresh in situ rock surfaces. Thus, this study’s objective was to better understand the sessile community in a [...] Read more.

Aquifers are rich in microbial diversity. However, there is a lack of information about sessile communities in these environments because of the difficulty in sampling fresh in situ rock surfaces. Thus, this study’s objective was to better understand the sessile community in a fractured aquifer. Additionally, the impact of the rock mineral composition on microbial community composition during colonization was explored. Using a system of bioreactors, we recreated the environmental conditions of a 1.5 m deep aquifer in Covey Hill (QC, Canada) using groundwater samples collected from the site. We carried out 16S/18S rRNA amplicon sequencing of the water and sessile communities after 24 days of incubation. Our data showed that many microbial taxa overlapped between the sessile and planktonic communities, indicating colonization of the solid surfaces. Quartz and feldspar had a significant impact on bacterial community structure. Sessile communities were dominated by Gaillonella, Alkanindiges, unclassified Acetobacteraceae, Apoikiales, Glissomonadida, and Synurales. We could not detect any Archaea in the sessile community. The sessile communities contained bacterial genera involved in iron cycling and adapted to acidic and low-carbon-concentration environments. Eukaryotic predators dominated the sessile community. Full article

(This article belongs to the Special Issue Diversity in 2024)

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19 pages, 1644 KiB

Open AccessArticle

Carabid Beetles under the Influence of Megafires in Pine and Secondary Forests of Central European Russia

by Victor V. Aleksanov, Sergei K. Alekseev, Alexander B. Ruchin and Mikhail N. Esin

Diversity 2024, 16(7), 370; https://doi.org/10.3390/d16070370 - 27 Jun 2024

Viewed by 1201

Abstract

The identification of patterns and mechanisms of wildfire effects on biodiversity is of significant conservation importance. The research was conducted in a zone of mixed and broad-leaved forests. Carabid beetles were studied in eight sample plots that varied in relation to the 2010 [...] Read more.

The identification of patterns and mechanisms of wildfire effects on biodiversity is of significant conservation importance. The research was conducted in a zone of mixed and broad-leaved forests. Carabid beetles were studied in eight sample plots that varied in relation to the 2010 and 2021 fires through 2022 and 2023. A total of 8667 specimens of 108 species of carabid beetles were counted. In 2022, plots were clearly differentiated by the pyrogenic disturbance in terms of the carabid species structure. As the pyrogenic disturbance increases, the total abundance of brachypterous as well as herbivore species decreases sharply. The carabids that were the most prevalent in an undisturbed forest (Carabus arcensis, Carabus glabratus, Pterostichus oblongopunctatus, and Amara brunnea) demonstrated sensitivity to the 2010 fire. The pyrophilous species Pterostichus quadrifoveolatus and Sericoda quadripunctata were attracted to a moderately burned area. Poecilus lepidus is confined to areas burned in 2010 and not affected by the 2021 fire. A moderately burned area was characterized by increased abundance and number of species. In 2023, the degree of similarity of carabid populations between sample plots did not generally increase, but only the 2010 fire was identified as a significant factor in population differentiation. The abundance of carabids decreased in a moderately burned area and an unburned area near the fire edge. The abundance and number of species increased markedly in heavily burned areas due to open habitat species, while the abundance of Carabus arcensis and Amara brunnea decreased in unburned areas. Forest megafires threaten the biodiversity of carabid beetles in pine and secondary forests. Full article

(This article belongs to the Special Issue Diversity in 2024)

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10 pages, 476 KiB

Open AccessArticle

Comparing Ant Activity and Plants Bearing Extrafloral Nectaries in Rockland Habitats of the Florida Keys with Those of the Everglades and the Bahamas

by Suzanne Koptur and Kathleen H. Keeler

Diversity 2024, 16(7), 360; https://doi.org/10.3390/d16070360 - 24 Jun 2024

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Abstract

Rocklands are present in South Florida, both on the peninsula and in the Keys. Previous work has shown that extrafloral nectaries on pine rockland plants in the Florida Everglades and surrounding areas play a role in attracting ant protectors. Species with nectaries are [...] Read more.

Rocklands are present in South Florida, both on the peninsula and in the Keys. Previous work has shown that extrafloral nectaries on pine rockland plants in the Florida Everglades and surrounding areas play a role in attracting ant protectors. Species with nectaries are more abundant and ant activity greater in more recently burned pine rockland habitats compared with longer undisturbed rockland hammock forest. The floristic composition and prevailing climate of Keys rocklands differs substantially from those on the mainland, so we sought to investigate ant activity and the abundance of plants with extrafloral nectaries in Big Pine Key rockland habitats. Standard baiting methods were used to assess ant abundance and potential predation activity in hardwood hammock, shrubby pine rockland, and open pine rockland sites. Ant activity was the lowest in open pine rockland, greatest in hardwood hammock, and intermediate in shrubby pine rockland, the opposite of what has been observed in previous studies in southern peninsular Florida and on Andros, Bahamas. Sampling vegetation at these same sites revealed a larger proportion of plant species with extrafloral nectaries in the pine rocklands than the hammock, as observed previously in Everglades habitats. Possible reasons for differences in ant activity in Keys rockland habitats are discussed. Full article

(This article belongs to the Special Issue Diversity in 2024)

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17 pages, 3254 KiB

Open AccessArticle

Genetic Population Structure of Lane Snapper Lutjanus synagris (Linnaeus, 1758) in Western Atlantic: Implications for Conservation

by Mayra Núñez-Vallecillo, Iván Vera-Escalona, Antonella Rivera, Konrad Górski and Antonio Brante

Diversity 2024, 16(6), 336; https://doi.org/10.3390/d16060336 - 7 Jun 2024

Viewed by 2398

Abstract

Genetic structure and connectivity information can be used to identify biological corridors and prioritize the conservation of areas that help maintain ecosystem integrity. Some marine fish, especially those of commercial interest, have been proposed as suitable indicators to identify potential marine biological corridors [...] Read more.

Genetic structure and connectivity information can be used to identify biological corridors and prioritize the conservation of areas that help maintain ecosystem integrity. Some marine fish, especially those of commercial interest, have been proposed as suitable indicators to identify potential marine biological corridors due to their high mobility among habitats and socioeconomic importance. In this study, we assessed the genetic structure of lane snapper populations in the Honduran Caribbean to evaluate connectivity and identify potential environmental barriers. Furthermore, we evaluated the genetic characteristics of the lane snapper on a larger spatial scale, including populations across the rest of its distribution range in the western Atlantic, using mtDNA and nuDNA markers. Our results demonstrate a significant genetic diversity of lane snappers in the Honduran Caribbean. Furthermore, despite their high dispersal potential, we observed genetic structuring in lane snapper populations on a larger spatial scale, resulting in the formation of two distinct groups throughout their distribution range: group 1 from Florida, the Gulf of Mexico, Honduras, and Colombia and group 2 from Puerto Rico and Brazil. This genetic differentiation can be attributed to oceanographic barriers such as river plumes and marine currents. These findings have the potential to significantly impact marine conservation and management efforts in the region, both at local and regional scales. It is anticipated that they will not only inform but also elicit a response, driving further action towards effective conservation measures. At a local scale, we recommend that conservation efforts focus on protecting critical habitats. At a regional scale, lane snappers should be included in the management plans of existing marine protected areas necessary to ensure the long-term sustainability of the species and the marine ecosystems in which it resides. Full article

(This article belongs to the Special Issue Diversity in 2024)

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17 pages, 4762 KiB

Open AccessArticle

Soil Studies for Fungal Diversity to Enable the Conservation Translocation of Green-Winged Orchid

by Millie Brigitte Newmarch, Mélusine Velde, Manoj Menon and Viswambharan Sarasan

Diversity 2024, 16(6), 327; https://doi.org/10.3390/d16060327 - 31 May 2024

Viewed by 1173

Abstract

Conservation Translocation (CT), which includes reintroduction, reinforcement and introduction, is gaining momentum, responding to serious population decline in many orchids. Orchid conservation underpinned by a greater emphasis on understanding biotic and abiotic factors of habitats is critical for successful recovery and restoration programmes. [...] Read more.

Conservation Translocation (CT), which includes reintroduction, reinforcement and introduction, is gaining momentum, responding to serious population decline in many orchids. Orchid conservation underpinned by a greater emphasis on understanding biotic and abiotic factors of habitats is critical for successful recovery and restoration programmes. Anacamptis morio, commonly known as green-winged orchid (GWO), is a terrestrial orchid found throughout Europe, but populations in England rapidly declined in its native range in the last several decades. The current study explored the relationship between soil abiotic characteristics and the community composition of key fungal groups. Wild sites in Essex and Cumbria in England, where successful colonies are currently present, were compared to potential sites for CT in Cumbria. The Cumbrian sites managed by cattle grazing include the wild site and three potential CT sites, with two of them hosting no GWO plants. The Essex site, fOxley Meadow, where no cattle is used for grassland management, hosts the largest population of GWO in England. The aim of this study was to understand whether the community composition of fungi and soil characteristics of the potential CT sites in Cumbria are nearly compatible with that of Oxley Meadow. Oxley Meadow, with around 65,000 plants, stands out as a unique habitat compared to all Cumbria sites, as it showed low organic content. Nitrate and phosphate content were smaller for Oxley Meadow compared to other Cumbrian sites. The proportion of Basidiomycota fungi was greater in Oxley Meadow compared to all Cumbrian sites where Ascomycota dominated. The abundant fungal group found in Oxley Meadow was Agaricales. From Agariclaes, Hygrophoraceae or waxcaps fungi are considered an indicator group of fungi and were the most abundant group in Oxley Meadow. They have a negative correlation with targeted key fungal groups and abiotic parameters. More in-depth assessments using additional primers are essential to better understand the fungal diversity and how this diversity translates to the resilience of orchid habitats. This preliminary study points to future studies to assess whether sites are near-compatible to the wild site where large colonies are present using additional primers collected over different time scales. Full article

(This article belongs to the Special Issue Diversity in 2024)

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18 pages, 4207 KiB

Open AccessArticle

Plastid Phylogenetics, Biogeography, and Character Evolution of the Chinese Endemic Genus Sinojackia Hu

by Xing Jian, Yuliang Wang, Qiang Li and Yongmei Miao

Diversity 2024, 16(5), 305; https://doi.org/10.3390/d16050305 - 18 May 2024

Cited by 1 | Viewed by 1045

Abstract

Sinojackia Hu. comprises five to eight Chinese endemic species with high ornamental and medicinal value. However, the generic limits, interspecific relationships and evolutionary history of the genus remain unresolved. In this study, we newly sequenced three plastomes of S. oblongicarpa and compared them [...] Read more.

Sinojackia Hu. comprises five to eight Chinese endemic species with high ornamental and medicinal value. However, the generic limits, interspecific relationships and evolutionary history of the genus remain unresolved. In this study, we newly sequenced three plastomes of S. oblongicarpa and compared them with those of the other congeneric species to explore the taxonomic delimitation of the species and the evolutionary history of the genus. The plastome structure of Sinojackia species was extremely conserved in terms of number of genes, sequence length, and GC content. The codon usage patterns revealed that natural selection may be the main factor shaping codon usage bias. Our phylogenetic tree shows that Sinojackia is monophyletic and can be divided into two clades. Sinojackia oblongicarpa as a distinct species is supported for it is distantly related to S. sarcocarpa. The evolutionary analysis of morphological features indicates that the woody mesocarp is an ancestral feature. Sinojackia originated in central Southeast China during the early Miocene. In this period, it experienced elevated diversification and migrated from central Southeast China to the Hunan Province and the Sichuan Province with the development of the Asian monsoon and East Asian flora. Glacial–interglacial interactions with the monsoon climate may provide favorable expansion conditions for Sinojackia on a small scale. Full article

(This article belongs to the Special Issue Diversity in 2024)

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26 pages, 6709 KiB

Open AccessArticle

Age Readings and Assessment in Coastal Batoid Elasmobranchs from Small-Scale Size-Selective Fishery: The Importance of Data Comparability in Multi-Specific Assemblages

by Umberto Scacco, Fabiana Zanardi, Silvio Kroha, Emanuele Mancini, Francesco Tiralongo and Giuseppe Nascetti

Diversity 2024, 16(5), 271; https://doi.org/10.3390/d16050271 - 30 Apr 2024

Viewed by 955

Abstract

The large variation in vertebral shape and calcification observed among elasmobranch species prevents using a single method for enhancing growth bands and reading age. Further, estimating age and growth parameters can be difficult or impractical when samples are incomplete due to the bycatch [...] Read more.

The large variation in vertebral shape and calcification observed among elasmobranch species prevents using a single method for enhancing growth bands and reading age. Further, estimating age and growth parameters can be difficult or impractical when samples are incomplete due to the bycatch of a size-selective fishery. Using a single and rapid method, age readings were obtained on the vertebrae of four batoid species, namely 53 individuals of Dasyatis pastinaca, 51 of Raja asterias, 15 of Torpedo marmorata, and 55 specimens of Torpedo torpedo, from the local small-scale trammel net fishery in the coastal waters (5–20 m depth) of the Central Tyrrhenian Sea during 2019–2021. Based on these data, a statistical routine was developed to obtain multiple estimates of age and growth parameters for incomplete samples due to size-selective fishing. The acceptable agreement between and within readers (intra and inter-reader disagreement < 5%) and the rate of increase in vertebral size with body size (differently ranked across species) demonstrated the consistency of the enhancing method. The parameters estimated by the Von Bertalanffy and Gompertz growth models matched the data available in the Mediterranean Sea for the species studied, with D. pastinaca, T. torpedo, and R. asterias showing the lowest (k = 0.05–0.12), intermediate (k = 0.112–0.19), and highest (k = 0.18–0.23) growth rates, respectively, in line with the life history traits of these species. Overall, the method proved effective both in delineating band pairs in vertebrae of different species and in reliably estimating the age and growth parameters of problematic samples due to size-selective fishing. The proposed method supports the collection of comparable demographic data from other areas where similar multi-specific assemblages are bycatch of size-selective fisheries impacting potential nursery areas and other essential habitats for elasmobranchs. Full article

(This article belongs to the Special Issue Diversity in 2024)

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18 pages, 8066 KiB

Open AccessArticle

Taxonomic Insights into Caulerpa (Bryopsidales, Chlorophyta) Species in French Polynesia: Confirmation of 13 Species and Reinstatement of C. pickeringii Harvey & Bailey

by Laura Lagourgue, Thomas Sauvage, Mayalen Zubia, Stefano G. A. Draisma, Christophe Vieira, Aschwin Engelen and Claude E. Payri

Diversity 2024, 16(4), 243; https://doi.org/10.3390/d16040243 - 18 Apr 2024

Viewed by 1776

Abstract

Caulerpa J.V. Lamouroux is a genus of green macroalgae belonging to the family Caulerpaceae in the order Bryopsidales. The genus comprises 104 currently accepted species, of which 51 have been recorded from Pacific Islands. Among these islands, French Polynesia is found in the [...] Read more.

Caulerpa J.V. Lamouroux is a genus of green macroalgae belonging to the family Caulerpaceae in the order Bryopsidales. The genus comprises 104 currently accepted species, of which 51 have been recorded from Pacific Islands. Among these islands, French Polynesia is found in the middle of the South Pacific Ocean and includes five archipelagos (i.e., the Austral, Gambier, Marquesas, Society, and Tuamotu Islands) where seaweed inventories have reported a total of 16 Caulerpa species so far based on morphology. Here, based on a sampling covering the five archipelagos of French Polynesia, we attempt to (i) verify the taxonomy of Caulerpa species present in these regions based on phylogeny, (ii) describe in more detail the specific diversity between the five archipelagos, and (iii) provide a morphological identification tool for these species. We successfully obtained 134 new tufA sequences for phylogenetic analyses, which corresponded to 13 species. We propose to resurrect C. pickeringii Harvey & Bailey for representatives of C. webbiana var. pickeringii and classify it in the Caulerpa subgenus Araucarioideae. We also transfer C. seuratii to C. pickeringii based on genetic results. A new morphological identification key is provided as well as an updated distribution of Caulerpa species across French Polynesia. Full article

(This article belongs to the Special Issue Diversity in 2024)

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14 pages, 11888 KiB

Open AccessArticle

Effective Field Collection of Pezizales Ascospores for Procuring Diverse Fungal Isolates

by Alassane Sow, Judson Van Wyk, Benjamin Lemmond, Rosanne Healy, Matthew E. Smith and Gregory Bonito

Diversity 2024, 16(3), 165; https://doi.org/10.3390/d16030165 - 6 Mar 2024

Viewed by 1851

Abstract

Pezizales are a diverse and economically important order of fungi. They are common in the environment, having epigeous form, such as morels and hypogeous, forms called truffles. The mature ascospores of most epigeous Pezizales are forcibly discharged through an opening at the ascus [...] Read more.

Pezizales are a diverse and economically important order of fungi. They are common in the environment, having epigeous form, such as morels and hypogeous, forms called truffles. The mature ascospores of most epigeous Pezizales are forcibly discharged through an opening at the ascus apex created with the lifting of the operculum, a lid-like structure specific to Pezizales. The axenic cultures of Pezizales fungi isolated from single ascospores are important for understanding the life cycle, development, ecology, and evolution of these fungi. However, obtaining single-spore isolates can be challenging, particularly for collections obtained in locations where sterile work environments are not available. In this paper, we introduce an accessible method for harvesting ascospores from fresh ascomata in the field and laboratory for obtaining single-spore isolates. Ascospores are harvested on the inside cover of Petri plate lids in the field, air dried, and stored. At a later date, single-spore isolates are axenically cultured through serial dilution and plating on antibiotic media. With this approach, we were able to harvest ascospores and obtain single-spore isolates from 12 saprotrophic and 2 ectomycorrhizal species belonging to six Pezizales families: Discinaceae, Morchellaceae, Pezizaceae, Pyronemataceae, Sarcosomataceae, and Sarcoscyphaceae. This method worked well for saprotrophic taxa (12 out of 19 species, 63%) and was even effective for a few ectomycorrhizal taxa (2 out of 13 species, 15%). This process was used to study the initial stages of spore germination and colony development in species across several Pezizales families. We found germination often commenced with the swelling of the spore, followed by the emergence of 1–8 germ tubes. This method is sufficiently straightforward that, provided with sterile Petri dishes, citizen scientists from distant locations could use this approach to capture spores and subsequently mail them with voucher specimens to a research laboratory for further study. The generated single-spore Pezizales isolates obtained through this method were used to generate high-quality genomic data. Isolates generated in this fashion can be used in manipulative experiments to better understand the biology, evolution, and ecogenomics of Pezizales. Full article

(This article belongs to the Special Issue Diversity in 2024)

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11 pages, 4515 KiB

Open AccessEditor’s ChoiceArticle

Diversity of Fish and Decapod Fry in the Coastal Zone of Amvrakikos Gulf

by George Katselis, Nikolaos Vlahos, Constandin Koutsikopoulos and Dimitrios K. Moutopoulos

Diversity 2024, 16(3), 164; https://doi.org/10.3390/d16030164 - 6 Mar 2024

Viewed by 1862

Abstract

Amvrakikos Gulf and its surrounding coastal lagoons are of primary importance for the local biodiversity and fishing activities. Fish species inhabited the coastal lagoons based on the seasonal ongoing migration movements of fry and adult fish individuals from the sea towards the lagoons. [...] Read more.

Amvrakikos Gulf and its surrounding coastal lagoons are of primary importance for the local biodiversity and fishing activities. Fish species inhabited the coastal lagoons based on the seasonal ongoing migration movements of fry and adult fish individuals from the sea towards the lagoons. Information on the early stages of fish and decapod species in the Amvrakikos Gulf is limited only to the planktonic ontogenetic stages and reproduction biology, respectively. The aim of this study was to describe the spatial distribution of fry from commercially important fish and decapod species in the coastal zone of Amvrakikos Gulf. The seasonal appearance of the early stage of the most commercially important fish species caught in the coastal zone of the gulf ranged from one to four seasons, depending on the species. Individuals of all ontogenetic stages (fry, juveniles, and adults) were reported for several species (A. boyeri, A. fasciatus, S. abaster, S. tyfle, and B. ocellaris), indicating that these species may be regarded as residents in the coastal zone, providing habitats for their entire life cycle. The average relative abundance of the species/genera exhibited no differences compared to other Greek brackish waters. The species composition in the Amvrakikos Gulf at 10 cm and above was in agreement with the transitional nature of the area, with permanent and occasional species present. The present study emphasizes the importance of the coastal zone as a nursery habitat for commercially important species. Full article

(This article belongs to the Special Issue Diversity in 2024)

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20 pages, 1607 KiB

Open AccessArticle

Diversity and Composition of Belowground Fungal Communities Associated with Picea abies L. (H.) Karst. and Larix sp. Mill.: A Comparative Study

by Jūratė Lynikienė, Adas Marčiulynas, Diana Marčiulynienė, Artūras Gedminas, Valeriia Mishcherikova and Audrius Menkis

Diversity 2024, 16(3), 160; https://doi.org/10.3390/d16030160 - 4 Mar 2024

Viewed by 1515

Abstract

The aim of the presented study was to compare the diversity and composition of fungal communities associated with the roots and the rhizosphere soil of P. abies and Larix sp. in mid-age and mature managed forest stands in Lithuania. We also aimed to [...] Read more.

The aim of the presented study was to compare the diversity and composition of fungal communities associated with the roots and the rhizosphere soil of P. abies and Larix sp. in mid-age and mature managed forest stands in Lithuania. We also aimed to assess the presence of fungi–host-specific associations, i.e., whether Larix sp. stands could provide habitats for soil fungi currently associated with P. abies. The study sites were 10 Larix sp. and 10 P. abies forest stands in Lithuania. For the study, 100 root samples and 10 organic and 10 mineral soil samples were collected in P. abies stands as well as the same number in Larix sp. stands, and DNA was isolated, amplified using ITS2 rDNA as a marker and subjected to high-throughput sequencing. The results showed that the Shannon diversity index of fungal communities was similar between the two tree species when compared either between root (H = 4.26 P. abies and H = 3.82 Larix sp.), organic soil (H = 5.12 P. abies and H = 5.13 Larix sp.) or mineral soil (H = 4.71 P. abies and H = 4.29 Larix sp.) samples. Multivariate analysis showed that the fungal community composition in the organic and mineral soil samples of both P. abies and Larix sp. were similar, and thus, overlapping. The analysis also showed that the distribution of fungal species was denser in the roots and organic soil but more scattered in mineral soil. However, several fungi in the roots of either P. abies or Larix sp. showed a certain host specificity. Full article

(This article belongs to the Special Issue Diversity in 2024)

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Review

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22 pages, 1446 KiB

Open AccessReview

The City as an Evolutionary Hothouse—The Search for Rapid Evolution in Urban Settings

by Gad Perry and Thomas Göttert

Diversity 2024, 16(6), 308; https://doi.org/10.3390/d16060308 - 21 May 2024

Viewed by 1975

Abstract

Cities are ubiquitous and, though a novel phenomenon by evolutionary standards, provide a home for many species and exert particularly strong and novel selection pressures on them. They thus offer a unique opportunity to study rapid evolutionary processes. We conducted a scoping review [...] Read more.

Cities are ubiquitous and, though a novel phenomenon by evolutionary standards, provide a home for many species and exert particularly strong and novel selection pressures on them. They thus offer a unique opportunity to study rapid evolutionary processes. We conducted a scoping review of published studies documenting evolutionary processes in urban environments, focusing primarily on more recent work. Unfortunately, cities have not been attractive environments for biological research and thus remain poorly studied, despite slowly growing interest in recent years. Nonetheless, we found studies documenting the effects of mutation, genetic drift, and selection in cities. However, studies show some geographic bias and were not always as conclusive as might be desired. There is even support for incipient urban speciation. Evidence across the board is less abundant and less conclusive than desirable, suggesting the need for more data collection. The urban setting, with its stronger selection, more common intermixing, and abundance of both human and widespread potential non-human zoonosis hosts and human-associated species offers great opportunities to further document evolution in action and explore its conservation implications. Full article

(This article belongs to the Special Issue Diversity in 2024)

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69 pages, 81603 KiB

Open AccessEditor’s ChoiceReview

The Axes of Divergence for the Evolutionary Radiation of Notothenioid Fishes in Antarctica

by Joseph T. Eastman

Diversity 2024, 16(4), 214; https://doi.org/10.3390/d16040214 - 30 Mar 2024

Cited by 4 | Viewed by 2121

Abstract

Notothenioid fishes, a perciform group, radiated in the cold shelf waters around the Antarctic continent and the 110 species dominate fish diversity, abundance, and biomass at levels of ≈77%, 92%, and 91%, respectively. This occurred in a locality with frequent glaciomarine cycles that [...] Read more.

Notothenioid fishes, a perciform group, radiated in the cold shelf waters around the Antarctic continent and the 110 species dominate fish diversity, abundance, and biomass at levels of ≈77%, 92%, and 91%, respectively. This occurred in a locality with frequent glaciomarine cycles that fragmented and obliterated habitats, disrupted ecosystems, and made parts of the high latitude shelves periodically uninhabitable. The notothenioid radiation encompasses three stages and 10 axes: for the habitat stage, divergence in (1) depth and (2) biotope, meaning subdivisions within the pelagic and benthic realms; for the morphology stage, divergence in (3) body size, (4) body density based on proportions of skeletal and adipose tissues, (5) body shape, (6) trophic morphology, specifically head morphology related to feeding (jaws, teeth, head size, and pharyngeal gape), and (7) neuromorphology (brain and sensory systems); and for the communication stage, divergence in (8) fecundity and egg size, (9) sexual dichromatism and dimorphism in body and fins, and (10) parental care behavior associated with nesting. There was an antecedent Eocene fossil fauna that did not include notothenioids and that has minimal taxonomic representation in the modern fauna. Liparids (snailfishes) and zoarcids (eelpouts) also diversified in Antarctic waters but with minimal divergence. Hypotheses are offered as to why these radiations played out the way they did and why notothenioids are dominant. Full article

(This article belongs to the Special Issue Diversity in 2024)

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14 pages, 960 KiB

Open AccessEditor’s ChoiceReview

Opportunities for Biodiversity Conservation via Urban Ecosystem Regeneration

by Gad Perry and Robert D. Cox

Diversity 2024, 16(3), 131; https://doi.org/10.3390/d16030131 - 20 Feb 2024

Cited by 3 | Viewed by 3406

Abstract

Conservation traditionally focuses on at-risk species and relatively intact ecosystems. As the human population and our global impact have risen, many more species and ecosystems are at risk and fewer intact ecosystems remain, with urbanization being a major contributing factor. Cities and their [...] Read more.

Conservation traditionally focuses on at-risk species and relatively intact ecosystems. As the human population and our global impact have risen, many more species and ecosystems are at risk and fewer intact ecosystems remain, with urbanization being a major contributing factor. Cities and their inhabitants are here to stay, and the prevalence of urbanization, often in the vicinity of areas of high conservation value, requires reconsideration of the conservation value of urban ecosystems and urban green spaces. Our aim is to explore the practical aspects of such actions. Urban ecosystem regeneration will require the incorporation of strategies for urban ecosystem regeneration into an overall conservation policy. The novel paradigm of urban ecosystem regeneration, advocated here, maximizes the capacity of urban spaces to support biodiversity while reducing undesirable outcomes and enhancing human wellbeing. The potential for cities to exacerbate biological invasion, climate change, and other ecosystem-degrading factors requires particular attention in devising a strategy for conservation in urban spaces, made essential by the predicted further spread of cities across the globe. Full article

(This article belongs to the Special Issue Diversity in 2024)

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