Special Issue "Biodiversity of Rotifers"

A special issue of Diversity (ISSN 1424-2818). This special issue belongs to the section "Marine Diversity".

Deadline for manuscript submissions: 31 December 2021.

Special Issue Editor

Dr. Evangelia Michaloudi
E-Mail Website
Guest Editor
Department of Zoology, School of Biology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: zooplankton ecology; food web interactions in Mediterranean freshwater ecosystems; morphology, taxonomy of zooplankton organisms (rotifers, cladocera, copepoda); use of zooplankton in ecological water quality estimation; diversity and biogeographical patterns of zooplankton organisms; lake restoration and management
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Special Issue Information

Dear Colleagues,

Rotifera are an amazing Phylum containing more than 2000 valid species described up to date. They are microscopic organisms found in both marine and freshwater systems, from large permanent lakes to small temporal puddles, from natron to acidic lakes, and from hyperoligotrophic lakes to sewage ponds. They represent a taxonomic challenge in several ways, while the limited number of morphological traits along with the vast range of plasticity halts the identification of their true diversity. Molecular tools assist, to that end, in unravelling a great number of cryptic species in the Phylum. Combined in an integrative approach with morphology and ecology, they contribute to accurate species description, which is fundamental in order to explain patterns of biological diversity and biogeography, understand population genetic processes, detect ecological divergence, and ultimately assess the ways in which ecosystems function. Rotifers, due to their short generation time and their reproductive mode, show rapid local adaptations, making them useful indicators of environmental change. The patterns of rotifer diversity can identify disturbance in aquatic ecosystems and assist in trophic state and water quality assessment, while the rotifer community (both in terms of composition and seasonal succession) plays a very important role in ecosystem functioning.

Dr. Evangelia Michaloudi
Guest Editor

Manuscript Submission Information

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Keywords

  • Taxonomy
  • Species delimitation
  • Morphology
  • Phylogeny
  • Biodiversity
  • Biogeography
  • Indices
  • Community ecology
  • Seasonality patterns

Published Papers (3 papers)

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Research

Article
Regional Pelagic Rotifer Biodiversity in a Tropical Karst Lake District
Diversity 2020, 12(12), 454; https://doi.org/10.3390/d12120454 - 28 Nov 2020
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Abstract
The species richness, composition, abundance, and biomass of pelagic rotifers were determined in 17 karst lakes of the “Lagunas de Montebello” National Park, Chiapas, Mexico. The species richness of the region (21 species) and single lakes (1–12 species) was smaller than that of [...] Read more.
The species richness, composition, abundance, and biomass of pelagic rotifers were determined in 17 karst lakes of the “Lagunas de Montebello” National Park, Chiapas, Mexico. The species richness of the region (21 species) and single lakes (1–12 species) was smaller than that of other Mexican, tropical, and temperate lakes. It is worth noting the high dissimilarity in species composition—about half (52%) of the species were observed in only 1–3 lakes. A total of eight rotifer families, all from the Monogononta subclass, were recorded. Keratella americana was the species with the highest occurrence (13 lakes), followed by Ptygura sp. (8 lakes). The abundance (0 to 536 ind L−1) and biomass (0 to 21 µg L−1) of rotifers were low. The highest values of species richness, abundance, and biomass were found in eutrophic lakes, and the lowest in oligotrophic lakes. The low values of rotifer biodiversity, abundance, and biomass in the Montebello lakes are probably the product of the interaction of different factors—such as environmental homogeneity (all water bodies are karst lakes), the low availability of “good-quality” food, and predation by cyclopoid copepods in the eutrophic lakes, and the low availability of food, and competitive interference by calanoid copepods and cladocerans in the oligotrophic lakes. Full article
(This article belongs to the Special Issue Biodiversity of Rotifers)
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Article
Patterns of Rotifer Diversity in the Chihuahuan Desert
Diversity 2020, 12(10), 393; https://doi.org/10.3390/d12100393 - 13 Oct 2020
Cited by 1 | Viewed by 796
Abstract
Desert aquatic systems are widely separated, lack hydrologic connections, and are subject to drought. However, they provide unique settings to investigate distributional patterns of micrometazoans, including rotifers. Thus, to understand rotifer biodiversity we sampled 236 sites across an array of habitats including rock [...] Read more.
Desert aquatic systems are widely separated, lack hydrologic connections, and are subject to drought. However, they provide unique settings to investigate distributional patterns of micrometazoans, including rotifers. Thus, to understand rotifer biodiversity we sampled 236 sites across an array of habitats including rock pools, springs, tanks, flowing waters, playas, lakes, and reservoirs in the Chihuahuan Desert of the USA (n = 202) and Mexico (n = 34) over a period of >20 years. This allowed us to calculate diversity indices and examine geographic patterns in rotifer community composition. Of ~1850 recognized rotifer species, we recorded 246 taxa (~13%), with greatest diversity in springs (n = 175), lakes (n = 112), and rock pools (n = 72). Sampling effort was positively related to observed richness in springs, lakes, rivers, and tanks. Nestedness analyses indicated that rotifers in these sites, and most subsets thereof, were highly nested (support from 4 null models). Distance was positively correlated with species composition dissimilarity on small spatial scales. We predicted species richness for unsampled locations using empirical Bayesian kriging. These findings provide a better understanding of regional rotifer diversity in aridlands and provide information on potential biodiversity hotspots for aquatic scientists and resource managers. Full article
(This article belongs to the Special Issue Biodiversity of Rotifers)
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Article
Thalassic Rotifers from the United States: Descriptions of Two New Species and Notes on the Effect of Salinity and Ecosystem on Biodiversity
Diversity 2020, 12(1), 28; https://doi.org/10.3390/d12010028 - 13 Jan 2020
Cited by 1 | Viewed by 1041
Abstract
This study shows the results of a rotifer faunistic survey in thalassic waters from 26 sites located in northeastern U.S. states and one in California. A total of 44 taxa belonging to 21 genera and 14 families were identified, in addition to a [...] Read more.
This study shows the results of a rotifer faunistic survey in thalassic waters from 26 sites located in northeastern U.S. states and one in California. A total of 44 taxa belonging to 21 genera and 14 families were identified, in addition to a group of unidentifiable bdelloids. Of the fully identified species, 17 are the first thalassic records for the U.S., including Encentrum melonei sp. nov. and Synchaeta grossa sp. nov., which are new to science, and Colurella unicauda Eriksen, 1968, which is new to the Nearctic region. Moreover, a refined description of Encentrum rousseleti (Lie-Pettersen, 1905) is presented. During the survey, we characterized samples by different salinity values and ecosystems and compared species composition across communities to test for possible ecological correlations. Results indicate that both salinities and ecosystems are a significant predictor of rotifer diversity, supporting that biodiversity estimates of small species provide fundamental information for biomonitoring. Finally, we provide a comprehensive review of the diversity and distribution of thalassic rotifers in the United States. The results of the present study increase the thalassic rotifer record for the U.S. from about 105 (87 at species level) to 124 (106 at species level) taxa. Full article
(This article belongs to the Special Issue Biodiversity of Rotifers)
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