Aquatic Conservation-Marine and Freshwater Ecosystems最新文献_第6页

Abnormal Demographic Structures May Preclude Population Viability in Isolated Populations of Freshwater Turtles

IF 2.5 3区环境科学与生态学

Aquatic Conservation-Marine and Freshwater Ecosystems Pub Date : 2025-01-17 DOI: 10.1002/aqc.70035

Julien Renet, Guillelme Astruc, Pauline Priol, Cédric Roy, François Boca, Aurélien Besnard

{"title":"Abnormal Demographic Structures May Preclude Population Viability in Isolated Populations of Freshwater Turtles","authors":"Julien Renet, Guillelme Astruc, Pauline Priol, Cédric Roy, François Boca, Aurélien Besnard","doi":"10.1002/aqc.70035","DOIUrl":"https://doi.org/10.1002/aqc.70035","url":null,"abstract":"<div>\u0000 \u0000 Freshwater turtles are one of the most threatened vertebrate groups in the world, mainly due to the degradation of their habitats. Some species, including the European pond turtle (Emys orbicularis), have been the subject of long-term monitoring programmes carried out within large, well-preserved wetlands and based on robust capture–mark–recapture (CMR) protocols. Yet demographic studies of small isolated populations are very scarce. In this study, a highly isolated population of E. orbicularis was intensively monitored in the Durance River Valley in southeastern France over five consecutive years (2013–2017). In total, 153 adult individuals were used to estimate demographic parameters using two different CMR Robust Design model formulations. These models estimated a relatively constant adult population size, annual survival and seniority probability over time, similar for both sexes, but a highly unbalanced sex ratio in favour of females (0.24 male per female on average). The results showed that this isolated population exhibits atypical and little-known demographic parameters in this species. The highly unbalanced sex ratio in favour of females could be the result of factors impacting sexual determinism during embryonic development. This imbalance could ultimately reduce the reproductive output and increase the risk of extinction of the population. These results highlight the need for both a better understanding of the mechanisms underlying the origin of such an imbalance, and in identifying the critical thresholds that must not be crossed to guarantee the viability of sex-biased populations.\u0000 </div>","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"35 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insights into the Phylogeography and Demographic History of the Native and Invasive Amphidromous Prawns of Hawai'i

IF 2.5 3区环境科学与生态学

Aquatic Conservation-Marine and Freshwater Ecosystems Pub Date : 2025-01-17 DOI: 10.1002/aqc.70048

Lauren Mathews, Kathleen Cole, Tracy Rhode

{"title":"Insights into the Phylogeography and Demographic History of the Native and Invasive Amphidromous Prawns of Hawai'i","authors":"Lauren Mathews, Kathleen Cole, Tracy Rhode","doi":"10.1002/aqc.70048","DOIUrl":"https://doi.org/10.1002/aqc.70048","url":null,"abstract":"<div>\u0000 \u0000 The Hawaiian archipelago is home to two species of amphidromous prawn in the genus Macrobrachium. Macrobrachium grandimanus is native to Hawai'i, whereas Macrobrachium lar was intentionally introduced in the mid-20th century and has since become established in similar habitats as M. grandimanus. This investigation sought to generate insights into the phylogeography of these two species, which are poorly understood in their Hawaiian range. Data from the mitochondrial COI gene from six collecting sites on four of the main Hawaiian Islands suggest high connectivity among M. grandimanus populations and indicate a possible population expansion characteristic of colonization of remote islands. The data also support a clear separation of the Hawai'i M. grandimanus from populations outside Hawai'i. For M. lar, COI data from five collecting sites on three of the main Hawaiian Islands revealed only three haplotypes, which showed a phylogenetic affiliation to populations in the North Pacific region of the species' native range. In sum, these new insights on population connectivity and phylogenetic affiliations provide relevant information that can assist conservation efforts of the native species M. grandimanus in Hawai'i and suggest that M. grandimanus should be managed as an endemic species. Competition between the two species may place populations of M. grandimanus at risk of decline or habitat shift.\u0000 </div>","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"35 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143115755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genetic and Morphometric Support for the Atlantic Pygmy Devil Ray, Mobula hypostoma (Bancroft, 1831), in the Eastern Atlantic Ocean

IF 2.5 3区环境科学与生态学

Aquatic Conservation-Marine and Freshwater Ecosystems Pub Date : 2025-01-17 DOI: 10.1002/aqc.70030

Emily Humble, Atlantine Boggio-Pasqua, Aristide Takoukam Kamla, Kim Bassos-Hull, Stephen Bergacker, Marc-Alexander Gose, Simon Hilbourne, Betty Laglbauer, Ana Martinez-Lopez, Cedrick Fogwan, Cedric I. Biankeu, Guy M. W. Stevens, Giuseppe Notarbartolo di Sciara

{"title":"Genetic and Morphometric Support for the Atlantic Pygmy Devil Ray, Mobula hypostoma (Bancroft, 1831), in the Eastern Atlantic Ocean","authors":"Emily Humble, Atlantine Boggio-Pasqua, Aristide Takoukam Kamla, Kim Bassos-Hull, Stephen Bergacker, Marc-Alexander Gose, Simon Hilbourne, Betty Laglbauer, Ana Martinez-Lopez, Cedrick Fogwan, Cedric I. Biankeu, Guy M. W. Stevens, Giuseppe Notarbartolo di Sciara","doi":"10.1002/aqc.70030","DOIUrl":"https://doi.org/10.1002/aqc.70030","url":null,"abstract":"Manta and devil rays are a diverse group of globally endangered elasmobranchs with a complicated taxonomic history. The emergence of genomic techniques has significantly improved our understanding of species units in the group, yet there is one species of devil ray for which uncertainty remains. Mobula rochebrunei (Vaillant, 1879), a pygmy devil ray inhabiting tropical waters of the eastern Atlantic, was recently synonymised with Mobula hypostoma (Bancroft, 1831), its western Atlantic counterpart. However, since there have been no sightings of the species in West and Central Africa for several decades, the revision was based on limited data, and further investigation was recommended. A dedicated monitoring effort in Cameroon recently led to the rare discovery of three pygmy devil rays, providing a unique opportunity to build on recent work. We use a combination of MinION sequencing and morphometric analysis to provide confirmation that pygmy devil rays on both sides of the Atlantic constitute the same species. Crucially, our work highlights the persistence of pygmy devil rays in West Africa despite concerns of disappearance and emphasises the need for urgent conservation action to avoid local extinction.","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"35 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aqc.70030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Depth-Related Controls on the Quantitative Composition of Rhodolith Matrices in the High Arctic

IF 2.5 3区环境科学与生态学

Aquatic Conservation-Marine and Freshwater Ecosystems Pub Date : 2025-01-17 DOI: 10.1002/aqc.70045

Ines Pyko, Max Wisshak, Sebastian Teichert

{"title":"Depth-Related Controls on the Quantitative Composition of Rhodolith Matrices in the High Arctic","authors":"Ines Pyko, Max Wisshak, Sebastian Teichert","doi":"10.1002/aqc.70045","DOIUrl":"https://doi.org/10.1002/aqc.70045","url":null,"abstract":"The calcareous matrix of rhodoliths can be composed of one or more crustose coralline algae (CCA) taxa as well as a mixed assemblage of various encrusting organisms. Studies on modern and fossil rhodoliths assume such associations to vary with water depth. Our study explores the quantitative biological composition of calcareous rhodolith matrices along a bathymetric gradient at the Arctic Svalbard archipelago. Using a methodological combination of virtual micro-CT cross-sections with a modified point counting approach, we found five different taxonomic groups: CCA, bivalves, serpulids, bryozoans and balanids. While water depth does not influence the general taxon richness as well as the abundance of bivalves, it significantly affects the proportional matrix composition of encrusting organisms by a combination of environmental factors and biological interactions. The decrease in CCA skeletal material with increasing water depth is significantly governed by impaired irradiance conditions. Regular rhodolith movement in shallow waters fosters the proportion of CCA, while decreased movement in deeper waters spurs the proportion of other encrusters. This potentially results from post-mortem fouling of dead rhodolith parts followed by a recolonization with slow-growing CCA species Boreolithothamnion glaciale. Our results highlight mechanisms controlling the biogenic composition of calcareous rhodolith matrices and underline the potential of matrices compositions for palaeogeography and palaeobathymetry. Our study contributes to an improved understanding of the composition and developmental patterns of rhodoliths. This can add to a better comprehension of the respective ecosystems on a broader scale and be beneficial for conservation purposes.","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"35 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aqc.70045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Marine Forests Forever—A Necessary Multilateral Program for a Fair Future

IF 2.5 3区环境科学与生态学

Aquatic Conservation-Marine and Freshwater Ecosystems Pub Date : 2025-01-17 DOI: 10.1002/aqc.70037

Paulo Horta, Marina N. Sissini, Alessandra Fonseca, Alexander Turra, Ana Claudia Rodrigues, Leonardo Rorig, José Bonomi-Barufi, Paulo Pagliosa, Eduardo Bastos, Guido Grimaldi, Carlos Eduardo Peixoto Dias, Fabio Fialho, Carlos Yure B. Oliveira, Nadine Schubert, João Silva, Jorge Assis, Lidiane Gouvea, Cicero Alves-Lima, Márcio A. G. Coelho, Ester A. Serrão, Pedro R. Frade, Andres Mansilla, Marcelo Soares, Sergio Rossi, Antonio Batista Anderson, Jean-Christophe Joyeux, Flávio Berchez, Francisco Otero-Ferrer, Jorge Luiz Rodrigues Filho, Miguel Mies, Moacyr Araujo, Jason M. Hall-Spencer

引用次数: 0

Development of an Environmental and Faecal DNA Tool for Monitoring the Spatial Distribution and Fish Predation on the Mountain Amphibian Calotriton asper

IF 2.5 3区环境科学与生态学

Aquatic Conservation-Marine and Freshwater Ecosystems Pub Date : 2024-12-23 DOI: 10.1002/aqc.70034

Marine Deluen, Géraldine Loot, Romain Bertrand, Fabien Aubret, Alice Valentini, Olivier Calvez, Claudine Delmas, Hugo Le Chevalier, Jean Muratet, Gilles Pottier, Alexandre Ribéron, Sylvain Rollet, Vincent Dubut, Audrey Trochet, Simon Blanchet

{"title":"Development of an Environmental and Faecal DNA Tool for Monitoring the Spatial Distribution and Fish Predation on the Mountain Amphibian Calotriton asper","authors":"Marine Deluen, Géraldine Loot, Romain Bertrand, Fabien Aubret, Alice Valentini, Olivier Calvez, Claudine Delmas, Hugo Le Chevalier, Jean Muratet, Gilles Pottier, Alexandre Ribéron, Sylvain Rollet, Vincent Dubut, Audrey Trochet, Simon Blanchet","doi":"10.1002/aqc.70034","DOIUrl":"https://doi.org/10.1002/aqc.70034","url":null,"abstract":"<div>\u0000 \u0000 Gathering ecological knowledge about species with cryptic behaviour can be challenging and strongly depends on human, financial and logistical resources. Yet, this is essential for the conservation of threatened and/or elusive species and wildlife management. The use of DNA tools is emerging as an efficient solution to overcome these constraints. Here, we developed specific primers and a droplet digital PCR (ddPCR) protocol for the quantitative detection of the endemic amphibian Calotriton asper in freshwater and fish faeces. After successful in silico validation of the developed primers, we tested their validity in the wild. First, using an environmental DNA approach, we confirmed the presence of C. asper in eight out of 13 sites deemed climatically suitable for the species, although it had never been observed there before. Then, we sampled brown trout (Salmo trutta) living in sympatry with C. asper and, through fish faeces analyses, confirmed that brown trout are predators of C. asper. These molecular tools proved efficient for monitoring (i) elusive species such as C. asper in the wild, allowing for better characterization of their current distribution and habitat use, and (ii) predation events by fish, which might be a significant pressure on low-density and isolated C. asper populations. We provide a valuable, low-cost and complementary tool for environmental managers and scientists that should help improve the development of fine-tuned conservation and management plans for C. asper.\u0000 </div>","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 12","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143118602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Climate Change Impacts and Future Risk on UK Seahorse Species, Short-Snouted Hippocampus hippocampus and Long-Snouted Hippocampus guttulatus

IF 2.5 3区环境科学与生态学

Aquatic Conservation-Marine and Freshwater Ecosystems Pub Date : 2024-12-22 DOI: 10.1002/aqc.70027

Reagan H. Pearce, Hazel Selley

{"title":"Climate Change Impacts and Future Risk on UK Seahorse Species, Short-Snouted Hippocampus hippocampus and Long-Snouted Hippocampus guttulatus","authors":"Reagan H. Pearce, Hazel Selley","doi":"10.1002/aqc.70027","DOIUrl":"https://doi.org/10.1002/aqc.70027","url":null,"abstract":"For the two European seahorse species, the short-snouted Hippocampus hippocampus and the long-snouted Hippocampus guttulatus, there are knowledge gaps that need further research. These research gaps become increasingly pressing under climate change, where uncertainty in how coastal ecosystems will change is compounded by uncertainty in how these seahorses will respond to changing pressures. Under climate change, these species could experience northward range shifts, expanding their range in United Kingdom (UK) coastal waters, potentially requiring the UK to take a leadership role in European seahorse conservation in the future. This review aims to synthesise current scientific research to provide an overview of how these seahorse species are likely to respond to climate change. Using the most recent Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6), predictions for future change along with the likelihood and severity of seahorse species response are combined to provide a confidence ranking in the climate change risk for these species in the UK. When considering individual factors, such as sea surface temperature, these seahorse species show some resilience, but climate change is the cumulative impact of multiple stressors, which existing research has not been able to capture. Overall, further research on seahorse response to environmental variables is needed across Europe.","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 12","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aqc.70027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Patterns in Plant Species Diversity and Composition of a Restored Nature-Based Solutions Floodplain

IF 2.5 3区环境科学与生态学

Aquatic Conservation-Marine and Freshwater Ecosystems Pub Date : 2024-12-22 DOI: 10.1002/aqc.70023

S. Pastina, E. T. H. M. Peeters, M. Daumal, R. H. J. Erkens

{"title":"Patterns in Plant Species Diversity and Composition of a Restored Nature-Based Solutions Floodplain","authors":"S. Pastina, E. T. H. M. Peeters, M. Daumal, R. H. J. Erkens","doi":"10.1002/aqc.70023","DOIUrl":"https://doi.org/10.1002/aqc.70023","url":null,"abstract":"Floodplains are simultaneously among the most ecologically important and most severely impacted ecosystems in the world, with hydro-morphological alteration of riverine systems leading to declines in biodiversity. The loss of floodplain ecosystems worldwide increased interest in restoration projects throughout the world, centred around the concept of nature-based solutions (NBS). Floodplain restoration is increasingly regarded as one of the most successful forms of NBS. However, stream restoration projects lack in-depth monitoring practices, highlighting the need for evaluations of NBS restoration success on riparian vegetation. This study analysed patterns in plant species diversity and composition following restoration of the Bosscherveld floodplain, part of the Grensmaas Project, the largest nature-based river restoration project in the Netherlands. A total of 173 species were recorded over 325 quadrats. For each plot, hydro-geomorphological factors were analysed. Habitat type and water depth were key determinants of plant species distribution. Species richness significantly declined in relation to increasing hydrological stress, and vegetation was distributed according to species-specific tolerances to disturbance. Spatial coordinates, habitat type, sediment type, water percentage and depth all significantly contributed to differences in vegetation composition. Spatial variables emerged as the most significant contributors to the explained variation. The study concludes that the Bosscherveld floodplain displays high habitat heterogeneity and a significant presence of wetland species, aligning with initial restoration objectives. These findings underline the importance of monitoring to enhance the effectiveness of river restoration projects, ensuring the continued success of NBS initiatives in floodplain ecosystems.","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 12","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aqc.70023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unfoldings of Environmental Racism: Are They Reaching Rhodolith Beds and Related Sociobiodiversities? 环境种族主义的发展：它们是否已触及罗德石床和相关的社会生物多样性？

IF 2.5 3区环境科学与生态学

Aquatic Conservation-Marine and Freshwater Ecosystems Pub Date : 2024-12-20 DOI: 10.1002/aqc.70017

Paulo Horta, Gabrielle Koerich, Marina Sissini, Bruna Rodrigues Moreira, Leonardo Rubi Rörig, José Bonomi-Barufi, Carlos Yure B. Oliveira

{"title":"Unfoldings of Environmental Racism: Are They Reaching Rhodolith Beds and Related Sociobiodiversities?","authors":"Paulo Horta, Gabrielle Koerich, Marina Sissini, Bruna Rodrigues Moreira, Leonardo Rubi Rörig, José Bonomi-Barufi, Carlos Yure B. Oliveira","doi":"10.1002/aqc.70017","DOIUrl":"https://doi.org/10.1002/aqc.70017","url":null,"abstract":"<div>\u0000 \u0000 Environmental racism may be among the explanations for why we are facing the worst socioenvironmental crisis in the history of humanity, led by a state of climate emergency that could result in an ecocidal genocide of planetary dimensions. Unfoldings of environmental racism even reach towards nature when it is considered subject of rights. Among the marine ecosystems less considered in these discussions are rhodolith beds—reef habitats of red coralline algae, also called maerl beds. When dealing with the feasibility of oil exploration in the Amazon mouth region, an area dominated by extensive rhodolith beds, the Brazilian Association of Petroleum Geologists broadcast live a geologist quoted as saying (transcript follows) ‘… what there is (at the mouth of the Amazon) are coralline algae called rhodoliths, which are common, anywhere in Brazil, and are things, errrrr (with hand gestures and facial expression with negative or pejorative sense), ugly like that, they're not nice at all, (…) and even the rhodolith reefs are dead reefs, dead’. As a result, now, the region is facing the real possibility of extensive oil exploitation. This opinion of a limited aesthetical perspective of which nature is important demands urgent public recognition. Policies that foster rhodolith bed conservation needs, explaining their wealth of valuable contributions to society, must be introduced in formal education, dialoguing with children, young people and adults. Multilateral United Nation forums, during the Ocean Decade, can provide ways to speed up this process, combating different forms of environmental racism and speciesism, buying some time and creating opportunities to establish rhodolith bed conservation as a natural world heritage.\u0000 </div>","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 12","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Conservation Implications of Strong Population Structure Despite Admixture in an Endangered African Seagrass 一种濒危非洲海草的种群结构尽管存在混杂现象，但其强大的种群结构对自然保护的影响

IF 2.5 3区环境科学与生态学

Aquatic Conservation-Marine and Freshwater Ecosystems Pub Date : 2024-12-20 DOI: 10.1002/aqc.70012

Charlotte A. Combrink, Romina Henriques, Megan J. Jackson, Sophie von der Heyden

{"title":"Conservation Implications of Strong Population Structure Despite Admixture in an Endangered African Seagrass","authors":"Charlotte A. Combrink, Romina Henriques, Megan J. Jackson, Sophie von der Heyden","doi":"10.1002/aqc.70012","DOIUrl":"https://doi.org/10.1002/aqc.70012","url":null,"abstract":"Zostera capensis is an African seagrass that is endangered throughout its range. In South Africa, it is solely confined to low wave energy estuarine habitats and characterised by two evolutionary lineages that diverge across a biogeographic transition. In this study, we sampled seagrass plants from five populations that span the region of lineage divergence and investigated the extent of lineage overlap. Using 2681 SNP loci, including 32 putative outlier loci, we calculated population structure, genomic diversity and levels of admixture. All populations were significantly different to each other, including those < 10 km apart and low levels of admixture indicate limited dispersal of Z. capensis. Every population was characterised by a high inbreeding coefficient (FIS), suggesting a limited number of breeding individuals in each population. Given increasing anthropogenic stressors that are linked to declines in seagrass meadow cover in South Africa, our study provides strong support that populations of this endangered seagrass require targeted management and conservation actions of each individual population to avoid further loss of the unique evolutionary dynamics and to safeguard the ecosystem services seagrasses provide. Further, our evidence of significant population structure across geographically close populations highlights that conservation efforts relying on seagrass restoration would risk mixing unique evolutionary signatures of Z. capensis in the region when transplanting between estuaries. This represents a critical challenge to using transplants as a potential mechanism of restoring declining populations and highlights the crucial importance of preventing population extinction.","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 12","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aqc.70012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0