Ecological Restoration, Functioning and Conservation of Coastal Wetlands

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

Deadline for manuscript submissions: 30 September 2025 | Viewed by 1052

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Faculty of Arts and Humanities, University of Passau, Innstraße 40, 94032 Passau, Germany
Interests: mangrove ecology; high mountain research; vegetation dynamics; plant ecology; plant diversity; vegetation geography
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Special Issue Information

Dear Colleagues,

Coastal wetlands, including mangroves, saltmarshes, and seagrass beds, are indispensable ecosystems that occupy a narrow yet critical fringe along the shores of all continents. The ecological restoration of these wetlands is crucial for maintaining their functioning and conserving their biodiversity and ecological services. These ecosystems play a pivotal role in flood and erosion protection, carbon sequestration, and water purification, among other vital functions. However, they are fragile and vulnerable to natural disturbances such as storms, tsunamis, or sea level rise, as well as land reclamation, deforestation, eutrophication, and other anthropogenic activities, which have led to significant losses in wetland area over the past few decades. Therefore, besides natural regeneration, ecological restoration efforts are essential for revitalizing these wetlands and ensuring their continued functioning and conservation. By understanding and mitigating these disturbances, we can protect these crucial ecosystems and their invaluable contributions to both natural and human communities.

This Special Issue will provide a platform for sharing the latest research advancements in these areas. We welcome submissions across diverse disciplines related to the ecological restoration, functioning, and conservation of coastal wetlands. Short communications, research papers, and reviews are all welcome.

Dr. Thomas Fickert
Guest Editor

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Keywords

  • coastal wetlands
  • salt marshes
  • mangroves
  • seagrass
  • habitat diversity
  • functioning
  • restoration
  • regeneration
  • wetland biodiversity
  • wetland conservation

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Published Papers (2 papers)

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Research

25 pages, 2622 KiB  
Article
Relative Influence of Salinity in the Flow and Accumulation of Organic Carbon in Open-Water Karstic Mangroves
by Angélica Paola Quintero Alvarado, Jairo Humberto Medina Calderón and José Ernesto Mancera-Pineda
Diversity 2025, 17(5), 360; https://doi.org/10.3390/d17050360 - 19 May 2025
Viewed by 422
Abstract
Carbonat—open-water mangroves have high organic carbon (OC) content, apparently due to sediments’ biophysical characteristics. However, the role of key regulators such as salinity and hydroperiod, which modulate the forest structure and, therefore, carbon dynamics, has been little explored. This study evaluates the influence [...] Read more.
Carbonat—open-water mangroves have high organic carbon (OC) content, apparently due to sediments’ biophysical characteristics. However, the role of key regulators such as salinity and hydroperiod, which modulate the forest structure and, therefore, carbon dynamics, has been little explored. This study evaluates the influence of salinity on the accumulation of aerial and underground OC (production of litter and roots), in open—water karstic forests. To this end, an experimental design was implemented on San Andrés Island, where an edaphic salinity gradient exists due to the water regime. Three physiographic types of mangroves, characterized by different saline regimes, were selected for the study. Two inland forests were selected, both of which exhibited a mesohaline regime (9.63 ± 6.26 and 11.54 ± 7.46 PSU), while a third site corresponded to a euhaline fringe forest (37.47 ± 5.76 PSU). The final location was characterized by a hyperhaline regime basin forest (62.36 ± 10.54 PSU). The fundamental hypothesis posited an inverse relationship between salinity and litter production, and a direct relationship between salinity and root production. To assess root production, the growth core implantation technique (108 soil cores) was employed, with live roots selected based on diameter (<2, 2–5, and 5–20 mm). The mean (±SD) OC content in dry litter (Mg C ha1y1) was 8.96 ± 0.28; 5.57 ± 0.15; 6.31 ± 0.27; and 4.54 ± 0.8; while The production of dry roots was 0.41 ± 0.08; 1.19 ± 0.46; 1.30 ± 0.5; and 0.24 ± 0.20, for the mesohaline forests, the euhaline forest, and the hyperhaline forest, respectively. The proposed hypotheses were confirmed when considering only the extreme salinity ranges. Upon incorporating all salinity ranges from the four forests into the analysis, it was observed that litter production exhibited a tendency to decrease with increasing salinity, while root production demonstrated a tendency to increase. However, this trend did not attain statistical significance, thereby suggesting that, in addition to salinity, other factors may also regulate production processes. These findings serve to affirm the high productivity of carbonate environments and the contribution of autochthonous production. Full article
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15 pages, 5046 KiB  
Article
Changes and Influencing Factors of Carbon Content in Surface Sediments of Different Sedimentary Environments Along the Jiangsu Coast, China
by Linlu Xu, Hui Ye, Jianing Yin, Qiang Shu and Yuxin Fan
Diversity 2025, 17(3), 158; https://doi.org/10.3390/d17030158 - 25 Feb 2025
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Abstract
Coastal areas are essential for global ‘blue carbon’ burial, significantly impacting the global carbon cycle. To better understand the carbon burial capacity, impact factors, and response mechanisms of surface sediments in different coastline regions, this study investigated the surface sediments of the Spartina [...] Read more.
Coastal areas are essential for global ‘blue carbon’ burial, significantly impacting the global carbon cycle. To better understand the carbon burial capacity, impact factors, and response mechanisms of surface sediments in different coastline regions, this study investigated the surface sediments of the Spartina alterniflora vegetation, transition, and bare flat areas along Jiangsu coast in China. The results indicated significant changes in organic carbon (OC), inorganic carbon (IC), and various physicochemical property indicators between the three coastal environments. There were also significant differences in the important impact factors of OC and IC in each region. In areas of vegetation, OC and IC influenced each other, while nitrogen (N), clay, and sand were common impact factors. The pH only had a significant impact on OC. In the bare flat area, the important impact factors of OC and IC were identical: OC/IC, clay, salinity (SAL), and sand. However, the important impact factors of OC and IC in the transition area have undergone significant changes. The important impact factors of OC were N, total phosphorus (TP), total sulfur (TS), SAL, and sand. The partial least squares regression analysis results of IC were poor, and there were no important impact factors. This study refined the spatial distribution patterns and response mechanisms to the important impact factors of carbon in different coastal subregions, providing a basis for accurately evaluating the role of coastal wetlands in mitigating global climate change. Full article
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