Journal of Biogeography最新文献

{"title":"Spatial Genetic Structure and Diversity Reveal Central-Marginal Patterns in the Rare Freshwater Mussel, Pleurobema riddellii","authors":"Alexander S. Zalmat,&nbsp;Matthew Harrison,&nbsp;Brad Littrell,&nbsp;Kyle T. Sullivan,&nbsp;Charles R. Randklev,&nbsp;Timothy H. Bonner,&nbsp;Noland H. Martin","doi":"10.1111/jbi.70329","DOIUrl":"https://doi.org/10.1111/jbi.70329","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>This study sought to evaluate how historical drainage connectivity and contemporary basin isolation have shaped population genetic structure and diversity in an imperilled species of freshwater mussel, <i>Pleurobema riddellii.</i></p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Covers the range of <i>P. riddellii</i>, spanning seven river basins of the Gulf Coastal Plains of the southern USA, including the San Jacinto, Neches, Sabine, Calcasieu, Red, Ouachita and Pearl river systems.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>A genome-wide single nucleotide polymorphism (SNP) dataset was generated using a restriction-site associated DNA sequencing approach. After filtering and assembly, a dataset consisting of 12,062 SNP loci from 351 individuals was retained. Population genetic structure was evaluated using principal components analysis and a Bayesian clustering model, ENTROPY. Genetic differentiation among river basins was quantified using Nei's <i>G</i>_ST and patterns of genetic diversity were assessed using observed heterozygosity and Watterson's <i>θ</i>.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Population genetic analyses revealed structuring that corresponded closely with river basin boundaries. Centrally distributed populations from the Neches, Sabine and Calcasieu basins formed a genetically cohesive group characterised by low genetic differentiation and elevated genetic diversity. Marginal populations from the San Jacinto, Red, Ouachita and Pearl basins exhibited higher levels of genetic differentiation and reduced genetic diversity.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Here, we demonstrate a central-marginal pattern in genomic structure and diversity across the range of <i>P. riddellii</i>. These results suggest that historical hydrological connectivity, coupled with prolonged isolation and reduced effective population sizes at range margins, likely played a role in shaping standing genomic variation in this system. More broadly, the genomic structure observed in <i>P. riddellii</i> is consistent with other unionid mussels in the region, highlighting the contributions of historical hydrological configurations in structuring freshwater biodiversity.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 8","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.70329","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753000","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":"Impacts of Quaternary Climate History on the Biogeography of Specialized Butterflies in the Great Basin of North America","authors":"Sarah B. Bialik,&nbsp;Joseph S. Wilson,&nbsp;Michelle Sneck,&nbsp;Dennis D. Murphy,&nbsp;James A. Fordyce,&nbsp;Katherine L. Bell,&nbsp;Matthew L. Forister,&nbsp;Chris C. Nice","doi":"10.1111/jbi.70325","DOIUrl":"https://doi.org/10.1111/jbi.70325","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;Dramatic Quaternary climate fluctuations impacted the evolutionary history and contemporary biogeography of many residents of the Great Basin Desert of western North America. This study investigates the historical biogeographic processes that shaped the contemporary distribution of genetic variation in a polytypic group of specialized butterflies that are residents of unique dune and playa habitats. Many of the subspecies are considered to be threatened and this study uses high-resolution SNP data to understand their history and quantify patterns of differentiation to inform conservation.&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;Great Basin, western North America.&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;The pallid dotted blue butterfly complex (&lt;i&gt;Euphilotes pallescens&lt;/i&gt;, Lycaenidae).&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;We constructed reduced-representation genomic libraries to generate population genomics data that were used in clustering, ordination, and phylogenetic analyses. Pairwise differentiation between localities was quantified and the relationship between genomic differentiation and geography was analysed using a linear model. In addition, an estimated effective migration surface illustrated geographic patterns of genomic variation.&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;&lt;i&gt;Euphilotes pallescens&lt;/i&gt; populations were clearly differentiated from congeneric species and several subspecies, especially in the northwestern portion of the sampled range, were identifiable from genomic variation. When geographic distance was controlled, genetic differentiation was greatest between populations of &lt;i&gt;Eu. pallescens&lt;/i&gt; compared to congeners, and within &lt;i&gt;Eu. pallescens&lt;/i&gt;, northwestern populations were more differentiated than southern populations. The estimated effective migration surface also showed greater areas of reduced gene flow in the northwestern region.&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;&lt;i&gt;Euphilotes pallescens&lt;/i&gt; comprises isolated populations on dune habitats in the Great Basin. Populations in the northwestern region are especially isolated and their patterns of genetic variation are consistent with the history of climate change and ancient pluvial lakes that occupied much of this region at intervals during the Quaternary. These butterflies are members o","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 8","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.70325","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753263","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":"Human Impacts, Climate, and Trait-Mediated Responses in Contemporary Mammal Distributions","authors":"Xin Chen,&nbsp;Luis José Aguirre-López,&nbsp;Xiao Feng","doi":"10.1111/jbi.70322","DOIUrl":"https://doi.org/10.1111/jbi.70322","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Human impacts are increasingly recognized as drivers of biogeographic patterns, yet it remains unclear whether they match or potentially surpass climate in shaping species distributions. Here we aim to investigate the relative importance of anthropogenic versus climatic factors in determining mammalian distributions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>North America.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Mammal.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We modelled the relationship between the contemporary (1990–2020) distributions of 219 mammal species and 12 representative anthropogenic and climatic factors, and quantified variable importance with ecological niche models and explainable artificial intelligence (i.e., SHapley Additive exPlanations or SHAP) at range-wide and local scales. We also constructed the response curve of human impact index (HII) for each species, and investigated the association between the response curves and species' biological traits.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>We found that anthropogenic factors were ranked as top contributors for more than half of the species examined, and HII showed permutation importance comparable to, and in many cases greater than, individual or principal components of bioclimatic variables. The SHAP maps showed that the dominating effects of HII were widespread across the continent, and the effects of other factors often showed spatial clusters at different subsections of species' ranges. Species' response to human impacts displayed diverse patterns, and the positive responses were associated with traits of reduced conflicts with humans, faster reproduction, and greater mobility.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>These results suggest that contemporary mammal distributions are co-determined by anthropogenic and climatic factors, with anthropogenic effects varying across space and among species. The extent of human impacts is comparable to and, in some cases, exceeds that of climate in shaping contemporary mammalian biogeography patterns. This highlights the need to broadly consider anthropogenic factors alongside climate when studying biogeography and biodiversity patterns in the Anthropocene.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 8","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753231","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":"Multidimensional Partitioning of β-Diversity in a Large Temperate-Boreal Forest Region","authors":"Minhui Hao,&nbsp;Qingmin Yue,&nbsp;Klaus von Gadow,&nbsp;Xiuhai Zhao,&nbsp;Chunyu Zhang","doi":"10.1111/jbi.70330","DOIUrl":"https://doi.org/10.1111/jbi.70330","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;β-diversity quantifies spatial variation in community composition, indicating species replacement or richness difference between different locations or habitats. Understanding the multidimensional patterns and components of β-diversity is essential for disentangling community assembly processes and guiding biodiversity conservation. However, traditional β-diversity studies predominantly focus on species diversity while the functional and phylogenetic dimensions are often neglected or overlooked.&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;Northeast China.&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;Trees.&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;Using a large-scale forest inventory dataset comprising 412 plots (0.1 ha each) across Northeast China, one of the world's most extensive temperate-boreal forest regions, we quantified β-diversity across species, functional, and phylogenetic dimensions within a unified framework. We further decomposed total β-diversity into replacement and richness difference components and assessed the local contribution to β-diversity (LCBD) to identify ecologically unique sites. Forward selection and variation partitioning were applied to disentangle the relative roles of environmental and spatial processes in shaping community uniqueness.&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;We found that replacement consistently dominated β-diversity across all dimensions, although its relative contribution declined when functional and phylogenetic information was incorporated, indicating that species turnover often involved functionally or phylogenetically similar taxa. Sites with high LCBD were concentrated in species-poor regions, particularly in the northwestern boreal forests, where functional and phylogenetic uniqueness was disproportionately high. Both environmental filtering and dispersal limitation jointly shaped community uniqueness, with stronger effects detected in functional and phylogenetic dimensions.&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 demonstrate that integrating multiple dimensions of β-diversity provides a more comprehensive understanding of forest biodiversity patterns and improves the identification of conservation priorities beyond species richness alone. In particular, we highlight that boreal forests with high functional and phylogenetic distinctiveness warrant greater conservation attention, which is especially relevant to the ongoing forest ecological p","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 8","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752822","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":"Long-Term Biodiversity–Stability Relationship in Temperate Mountain Forests","authors":"Petr Kuneš,&nbsp;Amanda Mateo-Beneito,&nbsp;Gabriela Florescu,&nbsp;Vachel Kraklow,&nbsp;Richard Chiverell,&nbsp;Jolana Tátosová,&nbsp;Helena Svitavská-Svobodová,&nbsp;Vojtěch Abraham,&nbsp;Oliver Heiri,&nbsp;Niina Kuosmanen","doi":"10.1111/jbi.70328","DOIUrl":"https://doi.org/10.1111/jbi.70328","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Theories on ecological stability lack the long-term observational data necessary to comprehend the dynamics of durable and complex ecosystems like forests; consequently, the influence of biodiversity on ecosystem stability remains predominantly unexplained. This study examines the mechanisms of forest community and tree population change using long-term palaeoecological data, evaluates responses to diverse effects, assesses stability and identifies the conditions that compelled these ecosystems to transition into alternative states. Furthermore, we aim to test whether higher diversity and larger populations promote stability.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Central Europe.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Tracheophytes (spore and pollen-producing vascular plants).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We analyse a 12,000-year lacustrine sedimentary record from a mountain lake Černé jezero, located in a spruce-dominated temperate mountain ecosystem in the Bohemian Forest of Central Europe, utilizing various proxies such as pollen, charcoal and geochemical data. We examined accumulation rates, ecological indices, and climatic and regression models to evaluate biodiversity, disturbances, rates of change, population stability and climate dynamics to identify the drivers of these changes.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Our findings indicate that species richness is negatively correlated with tree population stability. Furthermore, we discovered that tree population growth does not always facilitate stability as theorized.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>As mountain forests encounter escalating pressures from climate change and anthropogenic influences, our findings suggest that competition and turnover among species can undermine tree population-level resilience. Our results also emphasize the necessity of preserving species diversity while acknowledging the potential emerging threats to forest population stability.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 8","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.70328","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752823","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":"Biogeography of Dinoflagellate Cysts in the Indian Ocean: Environmental Filtering and Dispersal Shape Basin-Scale Diversity Patterns","authors":"Pranoy Paul,&nbsp;Jagadish S. Patil","doi":"10.1111/jbi.70321","DOIUrl":"https://doi.org/10.1111/jbi.70321","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>To test how environmental filtering and dispersal jointly shape large-scale biogeographic patterns of dinoflagellate cyst assemblages in pelagic ocean basins, while evaluating morphometric variability as environmental proxies.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Pelagic regions of the Indian Ocean, encompassing the Arabian Sea, Bay of Bengal, Equatorial Indian Ocean, and South Tropical Indian Ocean (up to 30°S latitude).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Time Period</h3>\u0000 \u0000 <p>Recent (surface sediments) collected during research cruises in January–February 2020 and March–June 2021.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Major Taxa Studied</h3>\u0000 \u0000 <p>Organic-walled dinoflagellate cysts (~48 species), including cosmopolitan taxa (<i>Operculodinium centrocarpum</i>, <i>Nematosphaeropsis labyrinthus</i>), and multiple harmful algal bloom (HAB) species.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Surface sediments (113–5396 m depth) were analysed for cyst assemblage composition, diversity metrics, morphometric variability, and dispersal pathways using statistical analyses and planktondrift simulations.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Productive northern regions supported higher diversity and cyst abundance, whereas oligotrophic southern regions showed reduced assemblages, indicating that productivity-driven environmental filtering and basin-scale dispersal jointly structure assemblage composition. Twenty-one taxa were cosmopolitan across multiple ocean basins, while 27 were endemic to northern regions. Morphometric variations in cyst process length and body size correlated with salinity and temperature gradients, supporting their proxy value. Dispersal modelling indicated lateral cyst transport over ~420–1570 km, highlighting potential long-distance connectivity that influences sedimentary assemblages. These findings indicate scale-dependent structuring of assemblages, with environmental filtering dominating in tropical pelagic systems while dispersal modifies regional composition.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Our results show that productivity, environmental filtering, and dispersal jointly structure dinoflagellate cyst biogeography at ocean-basin scales, highlighting their utility as indicators of basin-scale biogeographic patterns in pelagic systems.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 8","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752412","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":"Delineating Freshwater Fish Biogeographic Regions in the Philippine Archipelago","authors":"Brian Wade Jamandre,&nbsp;Nico Jose Leander,&nbsp;Rodulf Anthony Balisco,&nbsp;Faith Santiago-Tadeo","doi":"10.1111/jbi.70324","DOIUrl":"https://doi.org/10.1111/jbi.70324","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;To delineate native freshwater fish biogeographic regions in the Philippine archipelago and identify the contemporary and historical factors that structure freshwater fish diversity, endemism and species turnover.&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;The Philippine archipelago.&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;Native freshwater fishes.&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;We compiled an archipelago-wide dataset of native freshwater fish occurrences and integrated these with environmental variables and historical biogeographic groupings, including Pleistocene Aggregate Island Complex (PAIC) configurations. Species distributions, diversity and endemism were analysed using cluster analysis of a Simpson's beta (βsim) dissimilarity matrix to delineate provinces, with provincial assignments interpreted in light of the PAIC framework and prior biogeographic evidence. Inventory completeness per province was quantified using coverage-based rarefaction. Generalised Dissimilarity Modelling (GDM) was used to quantify the relative contributions of geographic, environmental and historical predictors to compositional turnover, with predictor importance and statistical significance assessed by matrix permutation. Indicator species analysis (IndVal) was applied to both the full dataset and the obligate primary-freshwater (PF) subset, and dendrogram congruence between the two analyses was tested with a Mantel test and cophenetic correlation.&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;Cluster analysis resolved five freshwater fish biogeographic provinces: Northern Luzon, Central/Southern Luzon, Greater Visayas, Mindanao and Palawan–Mindoro. Geographic distance was the strongest correlate of compositional turnover, while PAIC grouping and contemporary climate variables contributed comparatively little once geographic distance was accounted for. Two patterns stood out. First, the Visayan islands of Leyte and Samar clustered with the rest of the Greater Visayas rather than with Greater Mindanao, despite their conventional PAIC assignment to the latter, a pattern consistent with contemporary marine straits exerting biogeographic influence beyond what Pleistocene land-bridge predicts. Second, Palawan–Mindoro stood out as a Sundaic outlier within the Philippine archipelago, anchored by obligate primary-freshwater Cyprinidae of Bornean affinity. By contrast, Greater Visayas lacked any significant obligate-freshwater indicator and was characterised instead by an estuarine–freshwater interface assemblage, supporti","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 8","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752411","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":"Complementary Insights From Range Size and Range Structure in Explaining Species Distributions","authors":"Anna M. Csergő,&nbsp;Olivier Broennimann,&nbsp;Caroline McKeon,&nbsp;Antoine Guisan,&nbsp;Yvonne M. Buckley","doi":"10.1111/jbi.70319","DOIUrl":"https://doi.org/10.1111/jbi.70319","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>To assess the relationship between measures of species' range size and range structure, and to analyse how these measures differ in their relationships to species' intrinsic characteristics and external geographic drivers.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Europe.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>813 vascular plant taxa endemic to Europe.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We analysed the relationship between two measures of range size (extent of occurrence and area of occupancy) and two of range structure (range cover and expected patch size) using complete occurrence data from the Atlas Florae Europaeae. We used phylogenetically corrected linear mixed models to compare the effect of species' climatic niche breadth and continental land morphology (range-wide elevation heterogeneity, proximity to continental coasts and geographic position of species' ranges) on species' range size and range structure.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The strength and sign of the correlation between different geographic range size and range structure measures varied substantially. In addition, narrow niche breadth and continental land morphology constrained different range size and range structure measures unequally, with the effect sizes varying across individual measures.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Geographic range structure metrics are complementary to measures of geographic range size in explaining occurrence patterns, contributing distinct insight to our knowledge of ecological processes. Comparative analysis of patterns of range size and structure can complement our mechanistic understanding of species' distributions.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 8","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.70319","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752672","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":"Modelling Range Trends of the Alpine Ibex Under Climate Change Scenarios","authors":"Luca Colla,&nbsp;Laura Di Noia,&nbsp;Beatrice Poli,&nbsp;Alessia Ardenghi,&nbsp;Luca Natucci,&nbsp;Elena Caraffini,&nbsp;Francesco Nonnis Marzano,&nbsp;Alessandro Massolo,&nbsp;Matteo Riccardo Di Nicola","doi":"10.1111/jbi.70311","DOIUrl":"https://doi.org/10.1111/jbi.70311","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>High-altitude specialists such as the Alpine ibex are expected to be strongly affected by climate warming, but the magnitude and spatial patterns of future habitat losses across the Alps remain unclear. The aim of this work was to identify the major drivers of the Alpine ibex (<i>Capra ibex</i>) distribution and potential species range shift under two climate change scenarios, and to predict the potential IUCN Red List status according to habitat loss.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>European Alps (species' current distribution) plus a 100 km buffer for model calibration and within-range projections; mainland Europe and nearby islands for exploratory projections beyond the currently accessible range.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p><i>Capra ibex</i>.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>An ensemble of four machine learning algorithms (i.e., Random Forest, eXtreme Gradient Boosting Training, Artificial Neural Network, and Generalised Boosting Model) was used to develop an Ecological Niche Model, which was then projected over a period of two decades, grouped around the years 2050 and 2070 under SSP2-4.5 and SSP5-8.5 scenarios using different Global Circulation Models. The amount of habitat lost was used to provide an indicative assessment of potential future conservation risk following the IUCN A3 (C) criterion.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Annual mean temperature emerged as the most important predictor of habitat suitability. Under all scenarios, future projections highlighted severe losses of suitable habitat (i.e., up to 59.16% under SSP5-8.5 by 2070), especially in the Western Alps, potentially leading the species to be classified as endangered in the future under a worst-case scenario. Broader European projections identified out-of-range suitability mainly in Scandinavia and the Pyrenees, largely lost under future scenarios.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Climate change is expected to cause substantial habitat losses for the Alpine ibex across its range, even under intermediate scenarios, particularly in the Western Alps, underscoring the urgent need for conservation strategies that account for future climate conditions.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 8","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752674","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":"Clarifying the Labrisomus Conundrum: Deep Divergence, Cryptic Lineages, and a Genetic Melting Pot in the Atlantic Ocean (Teleostei, Labrisomidae)","authors":"Gabriel Soares Araujo,&nbsp;João Luiz Gasparini,&nbsp;Luiz A. Rocha,&nbsp;Hudson T. Pinheiro,&nbsp;Marcelo V. Kitahara,&nbsp;Anderson V. Vilasboa,&nbsp;Carol A. Stepien,&nbsp;Sergio R. Floeter,&nbsp;Fabio Di Dario","doi":"10.1111/jbi.70318","DOIUrl":"https://doi.org/10.1111/jbi.70318","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;We evaluate the phylogenetic relationships and taxonomic validity of Atlantic species of &lt;i&gt;Labrisomus&lt;/i&gt;, identifying the lineages currently assigned to &lt;i&gt;L. nuchipinnis&lt;/i&gt;, and assessing the role of biogeographic barriers in shaping the evolutionary history and geographic distribution of the genus.&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;Atlantic Ocean.&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;&lt;i&gt;Labrisomus&lt;/i&gt;.&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;We assembled an extensive mitochondrial and nuclear DNA dataset of Atlantic species of &lt;i&gt;Labrisomus&lt;/i&gt; to perform multi-locus phylogenetic divergence-time and historical biogeographic analyses, reconstruct haplotype networks, estimate genetic distances, implement lineage delimitation tests and estimate migration rates.&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;&lt;i&gt;Labrisomus nuchipinnis&lt;/i&gt; is a species complex comprising three deeply divergent lineages: one broadly distributed in the western Atlantic, another restricted to Florida (USA), and a third mostly distributed in the eastern Atlantic. A new usage of &lt;i&gt;L. nuchipinnis&lt;/i&gt; is proposed, with the species restricted to the western Atlantic, and with the revalidation of &lt;i&gt;Clinus canariensis&lt;/i&gt; (as &lt;i&gt;L. canariensis&lt;/i&gt;) for the mostly eastern Atlantic lineage. Despite their anatomical similarity, &lt;i&gt;L. nuchipinnis&lt;/i&gt; and its Atlantic congeners diverge significantly genetically. Unusual genetic connectivity between samples of &lt;i&gt;L. canariensis&lt;/i&gt; from the eastern Atlantic and southern Brazil suggests a potential trans-Atlantic genetic pathway.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Main Conclusion&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;The deep genetic divergence among lineages previously included in the &lt;i&gt;L. nuchipinnis&lt;/i&gt; complex contrasts with their anatomical similarity, making &lt;i&gt;Labrisomus&lt;/i&gt; one of the most challenging cases of cryptic diversification among reef fishes. The evolutionary history of the genus likely involved spatial segregation driven by ecological niche overlap. Ecological factors may influence distribution patterns among species of the genus more strongly than geographic distance. The apparently isolated population of &lt;i&gt;L. canariensis&lt;/i&gt; off southern Brazil provides a well-documented case of disjunct distribution of a reef fish species between the eastern Atlantic and south Brazil, highlighting the","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 8","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.70318","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752702","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}