Journal of Biogeography最新文献

{"title":"Oyster Size Distributions Vary Across Time and Space in the Tampa Bay Estuary, 250–2024 ce","authors":"Jaime A. Rogers, Thomas J. Pluckhahn, Kendal Jackson, Gregory S. Herbert, Stephen P. Geiger, Victor D. Thompson","doi":"10.1111/jbi.70208","DOIUrl":"10.1111/jbi.70208","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Restoration benchmarks often assume an undisturbed historic range of variability, if they include historic information at all. However, recent research highlights the need for a more nuanced understanding of shifting baselines and how to best incorporate past variabilities in modern management. We investigate trends in oyster size through time (ca. 250–2024 <span>ce</span>) and space (ca. 1000 km<sup>2</sup>) in the Tampa Bay Estuary to understand when and where ecologically significant changes to oyster populations occurred. By implementing a multiscalar approach, this study contributes historical ecological data relevant to contemporary restoration and management efforts and provides insights into understanding long-term socioecological dynamics in Florida's largest open-water estuary.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Tampa Bay Estuary, Florida, USA.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Time Period</h3>\u0000 \u0000 <p>ca. 250–2024 <span>ce</span>.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Mollusca; <i>Crassostrea virginica.</i></p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We measured sizes of over 15,000 oyster shells from archaeological sites and contemporary reefs across four estuarine sub-basins over approximately 2000 years to assess how mean and maximum shell sizes responded to shifts in climate and human harvesting and settlement patterns.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>We demonstrate a non-linear decline in oyster sizes through time, including a steep decline in oyster size prior to European colonization and commercial harvest. Changes in oyster size varied across sub-regions, and there was no consistent response to climatic variability. A moderate rebound in oyster size during the 19th century is evident and coincides with several social factors that alleviated harvest pressures for a relatively short period. However, most of the largest contemporary oysters remain significantly smaller than those in the deeper past.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Archaeological datasets provide relevant historical ecological information for understanding modern era declines in molluscs. Our data reveal that no single baseline exists for oyster size in Tampa Bay. Instead, oyster populations responded in complex ways to climatic variability, ecological stressors and human interactions. Oyster size is a valuable functional trait lin","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 4","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"General Biogeographic Rules and Lineage-Specific History Shape the Assembly of Asian Tropical Megadiversity","authors":"Hao Wu,&nbsp;Bing-Yue Zhu,&nbsp;Jing Yang,&nbsp;Qiang Zhang,&nbsp;Zhen-Ping Shi,&nbsp;Yan-Jing Shi,&nbsp;Xiao-Chen Zhao,&nbsp;Pei-Yi Yang,&nbsp;Ke-Xin Fan,&nbsp;Guang-Shun Li,&nbsp;Si-Qi Hu,&nbsp;Yee Wen Low,&nbsp;Chao Shi,&nbsp;Shuo Wang","doi":"10.1111/jbi.70200","DOIUrl":"10.1111/jbi.70200","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Tropical Asia's extraordinary plant diversity is thought to be intrinsically linked to its dynamic geological history. However, quantifying the precise evolutionary processes that assembled this diversity across the archipelago remains challenging. A recently proposed biogeographic framework classifies the functional roles of different regions as “radiators,” “incubators,” “corridors” or “accumulators,” offering a useful framework to analyse this complexity. Here, we aim to provide a critical, independent test of this framework using the megadiverse tree genus <i>Syzygium</i> as a model system. Syzygium originated on the Sahul Shelf, contrasting with the Indochinese origin of rattan palms used in the original framework validation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Tropical Asia, Pacific Islands and Africa.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We analysed the complete chloroplast genome of 200 species of the genus <i>Syzygium</i> and performed phylogenetic analysis to estimate divergence times, ancestral region reconstruction, and estimated diversification and extinction rates. We then analysed the relationship between regional area and the dispersal of species and examined speciation and dispersal patterns in relation to the geographical environment.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Our comprehensive chloroplast phylogenomic analysis indicates rapid diversification of <i>Syzygium</i> commencing ~12 million years ago, coinciding with shelf collision. Biogeographic reconstructions indicate that while the framework's general principles hold – continental shelf act as “radiators” and isolated islands as “incubators”<b>–</b>the specific geographic roles vary depend on lineage <b>history</b>.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Our study validates the radiator-incubator model as a general feature of tropical Asian evolution but refines it by demonstrating that historical contingency is key to understanding the assembly of Earth's richest biota. Tropical Asian plant diversity reflects a unique geological history of continental shelf collision and dynamic island geography, offering insights into biodiversity evolution in other geologically active regions worldwide, highlighting the importance of maintaining large, connected natural areas and dispersal corridors for preserving the evolutionary processes that generate Earth's botanical richness.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 4","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Functional Traits as Predictors of Global Dominance and Prevalence in Herbaceous Plants","authors":"Martti Vasar,&nbsp;Martin Zobel,&nbsp;Marina Semchenko,&nbsp;Carlos Pérez Carmona,&nbsp;John Davison","doi":"10.1111/jbi.70207","DOIUrl":"10.1111/jbi.70207","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Understanding why some plant species are abundant or widely distributed is a long-standing aim of plant ecology. This research investigated whether the position of herbaceous plant species within the plant economics spectrum (aboveground and belowground) and along the mycorrhizal collaboration gradient could explain their local abundance, geographic occupancy, and global abundance.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Global.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We used two published sources of global plant community data (sPlotOpen and the global biodiversity initiative facility; GBIF) to determine whether the local abundance, geographic occupancy, and global abundance of herbaceous plant species can be explained by their above- and belowground traits and estimates of mycorrhizal dependence and flexibility.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Both above- and belowground traits were only weakly associated with local abundance, while geographic occupancy was associated with small plant size and traits indicating fast return on investment in aboveground tissues. Geographic occupancy was also related to belowground traits, being positively associated with specific root length and negatively associated with root diameter, and weakly positively associated with mycorrhizal flexibility. The traits associated with global abundance largely mirrored those associated with occupancy.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Our analysis suggests that the local success of herbaceous plants is context-specific and there are no universal traits globally underlying high local abundance. By contrast, geographic occupancy aligns strongly with belowground traits, including specific root length and root diameter. The wide success of fine-rooted species may be related to nutrient enrichment during biogeographic history and in recent increasingly anthropogenic conditions.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 4","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Spatial Mismatches of Plant-Pollinator Interactions Under Future Climate Conditions","authors":"Samantha Day Briggs,&nbsp;Jill T. Anderson","doi":"10.1111/jbi.70204","DOIUrl":"10.1111/jbi.70204","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Global change could disrupt critical ecological interactions, especially if interacting species shift their geographic ranges at different rates or in different directions. Functional redundancy within generalized networks could make them more resilient to climate change than networks with highly specialized interactions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location and Taxon</h3>\u0000 \u0000 <p>In the Elk Mountains of Colorado, we examined plant-pollinator interactions in the Rocky Mountain Iris (<i>Iris missouriensis</i>), a charismatic generalist wildflower distributed across broad climatic gradients over elevation and visited by a diversity of pollinators.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>In 2021 and 2022, we recorded 90 h of video footage documenting potential pollinators that visited <i>I. missouriensis</i> flowers in seven populations arrayed across an elevational gradient. We recorded floral visitors twice per season in each population to capture spatial and temporal variation in pollinator species composition and abundance. We modelled plant-pollinator networks across <i>I. missouriensis</i> populations to evaluate species turnover and test the extent to which the diversity and abundance of pollinators vary across elevation. We examined range shifts in <i>I. missouriensis</i> and 11 of its key pollinators to test if climate change could generate spatial mismatches owing to species-specific changes in geographic distributions, disrupting plant-pollinator interactions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Our ecological network analysis revealed that pollinator species richness and diversity are highest at mid-elevation sites. Our species distribution models revealed that future climate scenarios could reduce the probability of <i>I. missouriensis</i> co-occurrence with current pollinators.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusion</h3>\u0000 \u0000 <p>Thus, species-specific geographic responses to climate change could reshape the pollinator community even of generalist plants with diverse pollinator assemblages.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 4","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.70204","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Diversity and Horizontal Turnover Depend on the Vertical Position in Neotropical Butterfly Communities","authors":"Sebastián Mena,&nbsp;Patricio Salazar-Carrión,&nbsp;Erika Páez,&nbsp;Sofía Nogales,&nbsp;Nathalia Artieda,&nbsp;Karina Torres,&nbsp;Elisa Levy,&nbsp;Jacqueline Rodríguez,&nbsp;Vernardo Ojeda,&nbsp;Lezlie Bustos,&nbsp;Alci Bustos,&nbsp;Luis Tonato,&nbsp;Raúl Aldaz,&nbsp;Anderson Medina,&nbsp;Carlos Morochz,&nbsp;Keith R. Willmott,&nbsp;María F. Checa","doi":"10.1111/jbi.70209","DOIUrl":"10.1111/jbi.70209","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>It is well-documented that the tropical forest biota is vertically stratified, and ecological theories from studies of the latitudinal gradient have been applied to predict and understand how communities vary across vertical strata. In butterflies, differences in abiotic conditions between the canopy and the understorey promote the evolution of distinct flight morphologies and physiologies. However, how these distinct morphologies relate to differences in dispersal ability is poorly explored and we lack a general understanding of how and why vertical stratification influences community turnover in tropical forests. Here, we explored how vertical stratification influences diversity, horizontal spatial similarity of assemblages and distance-decay patterns in understory and canopy butterflies across multiple ecosystems.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Seven forest ecosystems in Ecuador, South America.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Butterflies (Lepidoptera: Papilionoidea).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We assessed patterns of diversity by employing data from standardized butterfly monitoring programmes during the years 2011–2019 across seven sites in Ecuador (37,370 records from 1099 species), and a framework based on metacommunity theory and Jost's diversity estimates.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Our results suggest three vertical patterns for neotropical butterfly communities: (a) a strong partitioning of canopy and understorey subcommunities, with distinct resulting diversity profiles; (b) greater spatial similarity for the canopy assemblages compared to the understorey (both locally and regionally); and (c) steeper distance-decay patterns for understorey assemblages compared to the canopy.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Our study shows the generality of vertical stratification diversity patterns across multiple Neotropical ecosystems, including previously unstudied montane cloud forests. It also shows that horizontal variation in community composition depends on the vertical position of taxa within Neotropical forests and is in general consistent with predictions based on species ecology and morphology.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 4","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"The Dynamic Nature of Nearshore Shark Nurseries in the Northern Gulf of Mexico","authors":"Philip Matich,&nbsp;Lindsay L. Mullins,&nbsp;Jeffrey D. Plumlee,&nbsp;Mark R. Fisher,&nbsp;John Mareska,&nbsp;J. Marcus Drymon","doi":"10.1111/jbi.70210","DOIUrl":"10.1111/jbi.70210","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Aim&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Some habitats serve particularly important functions for wildlife. Identifying and appropriately managing these ‘essential habitats’ is critical, especially for wildlife that have faced severe population declines like sharks. Nursery habitats aid in the survival and development of juvenile sharks, which until recently were not formally identified or managed throughout most regions. Managing shark nurseries was in part challenging because there was no standardized quantitative method to delineate these essential habitats prior to the seminal paper written by Michelle Heupel and colleagues in 2007. Management in some regions now includes the protection of shark nurseries; however, changes in nursery dynamics in response to environmental change and human impacts are unclear. Here, we used long-term monitoring data to identify bull shark (&lt;i&gt;Carcharhinus leucas&lt;/i&gt;) and blacktip shark (&lt;i&gt;C. limbatus&lt;/i&gt;) nurseries and assess how they have changed over time.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Location&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Alabama coast and Texas coast, USA.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Time Period&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;1982–2023.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Taxa&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Bull shark, blacktip shark.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Methods&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Shark catch records (catch per unit effort) from long-term gillnet monitoring were assessed with general linear models and generalized linear models to determine (1) if shark nurseries exist in the Northern Gulf of Mexico, and (2) if and how they have changed over the study period using the shark nursery criteria established in 2007.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Results&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Northern Gulf of Mexico nurseries first (re)emerged in the early 2000s on the Texas coast for bull sharks, followed by a relatively rapid expansion along the Texas and Alabama coast. Fewer nurseries were identified for blacktip sharks, which (re)emerged more recently starting in the 2010s.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Main Conclusions&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Improved management has led to the re-establishment of shark nurseries. We expect that changes in these essential habitats will continue as environmental conditions and human impacts shape coastal ecosystems and the dynamics of nurseries within their waters. The delineation, management and reasse","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 4","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.70210","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147686753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Unravelling the Past: Genetic Structure and Species Diversity of Ancient Sturgeon in Lake Ladoga","authors":"Danijela Popović,&nbsp;Dilyara N. Shaymuratova,&nbsp;Oleg V. Askeyev,&nbsp;Mateusz Baca,&nbsp;Aleksandra G. Bilska,&nbsp;Daniel Makowiecki,&nbsp;Martyna Molak,&nbsp;Joern Gessner,&nbsp;Gaël Piques,&nbsp;Magdalena Fajkowska,&nbsp;Małgorzata Rzepkowska,&nbsp;Arthur Askeyev,&nbsp;Krzysztof Stefaniak,&nbsp;Adam Nadachowski,&nbsp;Michal J. Dabrowski,&nbsp;Igor V. Askeyev,&nbsp;Hanna Panagiotopoulou","doi":"10.1111/jbi.70192","DOIUrl":"10.1111/jbi.70192","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Aim&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Taxonomic identification, population demographics and genetic structure reconstruction of the historical Lake Ladoga sturgeon population, followed by assessment of admixture and gene flow of Atlantic and European sturgeons within the Baltic and broader European context.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Location&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Archaeological site at Staraya Ladoga (Zemlyanoe Gorodishche), encompassing samples from Lake Ladoga and the Volkhov River in north-western Russia.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Taxon&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Atlantic (&lt;i&gt;Acipenser oxyrinchus&lt;/i&gt;) and European (&lt;i&gt;A. sturio&lt;/i&gt;) sturgeons.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Methods&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;A total of 7130 sturgeon bones dated to the 9th–10th centuries CE were morphologically examined to determine their species identity. Age (&lt;i&gt;n&lt;/i&gt; = 51) and catch season (&lt;i&gt;n&lt;/i&gt; = 33) were reconstructed. Genetic analyses of remains from Ladoga (&lt;i&gt;n&lt;/i&gt; = 45) and other European localities (&lt;i&gt;n&lt;/i&gt; = 48) were conducted using three mitochondrial DNA (mtDNA) fragments, seven microsatellite loci (STRs), and one SNP-informative microsatellite locus (&lt;i&gt;Aox&lt;/i&gt;23) to assess species composition, ancestry, admixture, and gene flow with other sturgeon populations, including published historical Baltic (&lt;i&gt;n&lt;/i&gt; = 62) and contemporary samples from France and Canada (&lt;i&gt;n&lt;/i&gt; = 184).&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Results&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Age analysis showed a bias toward large, older individuals that were likely caught during spring-early summer spawning migrations. The Atlantic sturgeon was the dominant species, based on both morphology (83%) and genetic analysis. None of the individuals were identified as pure European sturgeon or first-generation hybrids. Only 5% of STR alleles showed European sturgeon ancestry, and 11% of individuals carried its diagnostic mtDNA haplotype. Admixed samples were found in the Ladoga region, Baltic Sea and North Sea.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Main Conclusions&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Our findings revealed the historical dominance of the Atlantic sturgeon in Lake Ladoga and across Northern Europe including the North Sea. It also sheds new light on the colonisation process, suggesting a rapid Atlantic sturgeon expansion into north-eastern Europe with minimal hybridization with European sturgeon during this phase. This study highlights past connectivity among sturgeon stocks in Europe and underscores the importance of preserving migration routes and habitats to maintain gene flow, which is critical for effective ","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Climate and Volcanic Activity Modulate Area–Distance Effects on Plant Diversity Along the Temperate–Subarctic Island Volcanic Arc","authors":"Kirill Korznikov,&nbsp;Vyacheslav Barkalov,&nbsp;Pavel Fibich,&nbsp;Jan Altman,&nbsp;Jiří Doležal","doi":"10.1111/jbi.70194","DOIUrl":"https://doi.org/10.1111/jbi.70194","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aims</h3>\u0000 \u0000 <p>To evaluate how equilibrium (ETIB) and niche-based (NTIB) island-biogeography frameworks jointly explain taxonomic and phylogenetic diversity in a temperate–subarctic, volcanically active archipelago.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Kuril Islands, northwestern Pacific (44°–50° N).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Time Period</h3>\u0000 \u0000 <p>Present.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Vascular plants.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We compiled island-level floras. We quantified species richness (SR) and phylogenetic diversity metrics and related them to latitude, area, distance, a composite isolation index, elevation, volcanic bedrock cover, vegetation-type diversity and aggregated climatic indices. Analyses combined linear and second-order polynomial regressions, β-diversity partitioning, non-metric multidimensional scaling and structural equation models.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Latitude emerged as the primary large-scale filter shaping both SR and phylogenetic diversity. Volcanic activity and isolation further constrained floristic diversity, together generating a pronounced mid-archipelago diversity trough. Maximal elevation was associated with higher SR but did not translate into detectable shifts in phylogenetic structure. Island area influenced diversity mainly indirectly, through its links with elevation and dispersal accessibility. Floristic differences among islands were driven predominantly by species turnover rather than nested species loss, indicating systematic replacement along the latitudinal gradient. Isolation effects were strongly non-linear, consistent with threshold-like limits to colonisation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Area–distance relationships predicted by ETIB are strongly context-dependent. Macroclimatic filtering and long-term volcanic activity outweigh simple spatial predictors, while habitat heterogeneity exerts a secondary, modulatory role. Together, our results integrate ETIB and NTIB perspectives by showing how environmental filtering and niche availability interact in a volcanically active, temperate–subarctic island system.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.70194","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147566793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Climate and Volcanic Activity Modulate Area–Distance Effects on Plant Diversity Along the Temperate–Subarctic Island Volcanic Arc","authors":"Kirill Korznikov,&nbsp;Vyacheslav Barkalov,&nbsp;Pavel Fibich,&nbsp;Jan Altman,&nbsp;Jiří Doležal","doi":"10.1111/jbi.70194","DOIUrl":"https://doi.org/10.1111/jbi.70194","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aims</h3>\u0000 \u0000 <p>To evaluate how equilibrium (ETIB) and niche-based (NTIB) island-biogeography frameworks jointly explain taxonomic and phylogenetic diversity in a temperate–subarctic, volcanically active archipelago.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Kuril Islands, northwestern Pacific (44°–50° N).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Time Period</h3>\u0000 \u0000 <p>Present.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Vascular plants.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We compiled island-level floras. We quantified species richness (SR) and phylogenetic diversity metrics and related them to latitude, area, distance, a composite isolation index, elevation, volcanic bedrock cover, vegetation-type diversity and aggregated climatic indices. Analyses combined linear and second-order polynomial regressions, β-diversity partitioning, non-metric multidimensional scaling and structural equation models.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Latitude emerged as the primary large-scale filter shaping both SR and phylogenetic diversity. Volcanic activity and isolation further constrained floristic diversity, together generating a pronounced mid-archipelago diversity trough. Maximal elevation was associated with higher SR but did not translate into detectable shifts in phylogenetic structure. Island area influenced diversity mainly indirectly, through its links with elevation and dispersal accessibility. Floristic differences among islands were driven predominantly by species turnover rather than nested species loss, indicating systematic replacement along the latitudinal gradient. Isolation effects were strongly non-linear, consistent with threshold-like limits to colonisation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Area–distance relationships predicted by ETIB are strongly context-dependent. Macroclimatic filtering and long-term volcanic activity outweigh simple spatial predictors, while habitat heterogeneity exerts a secondary, modulatory role. Together, our results integrate ETIB and NTIB perspectives by showing how environmental filtering and niche availability interact in a volcanically active, temperate–subarctic island system.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.70194","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147566859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Late Quaternary Climate-Driven Shifts in Arctic Plant Distributions","authors":"Paul T. Markley,&nbsp;Barnabas H. Daru","doi":"10.1111/jbi.70198","DOIUrl":"https://doi.org/10.1111/jbi.70198","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Glaciation events shaped the present distribution of many plants and their biodiversity in the northern hemisphere. Glacial expansion forced many species south and came with much colder global temperatures, while glacial recession brought warmer temperatures and newly colonisable land without competition. However, the changes in plant diversity associated with glacial retreat and the ensuing climatic changes are not well understood. In this study, we quantify Late Quaternary climate-driven changes in Arctic plant diversity by integrating climatic shifts in species distributions since the last glacial maximum (20–16 kya) and mid-Holocene (5 kya) across the circumpolar arctic.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>The geographic arctic, 66° N.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Vascular plants.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We built species distribution models using phyloregion v.1.0.9 in R using occurrence data from the Global Biodiversity Information Facility and bioclimatic variables from Worldclim v2.1 for the present-day and v.1.4 for both the mid-Holocene and Last Glacial Maximum.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results and Discussion</h3>\u0000 \u0000 <p>We found limited evidence for decreases in weighted endemism and species richness, along with north and south species range changes contrary to expectations of increased alpha diversity since the last glacial maximum. Decreases in species alpha diversity, while already quite low in the arctic, may be reflective of an increasingly variable arctic climate that disfavors plants with a slow dispersal ability. This is especially important given the projected increase in global temperature across many shared socioeconomic pathway scenarios and can be contrasted with our results of the Mid-Holocene, which was about one degree warmer than it is today. The arctic is presently warming at about two to five times the rate of the mid-latitudes and equator and understanding how plants have responded in the past will help inform on how they may change in the future.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 3","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147566500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}