Journal of Biogeography最新文献

{"title":"Trophic Reorganisation of Animal Communities Under Climate Change","authors":"Manuel Mendoza, Miguel B. Araújo","doi":"10.1111/jbi.15105","DOIUrl":"https://doi.org/10.1111/jbi.15105","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>This study employs a novel modelling approach to analyse and project global transformations in trophic structures driven by 21st-century climate change. The objective is to assess the impacts of these changes on trophic dynamics, providing insights to inform future research and biodiversity conservation strategies.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>A total of 14,520 terrestrial grid cells of 1° × 1° globally.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Time Period</h3>\u0000 \u0000 <p>The study uses 1990 as the baseline climate reference and projects current (2018) and future climate conditions for 2040, 2060, 2080 and 2100 under three Shared Socioeconomic Pathways (SSPs).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Major Taxa Studied</h3>\u0000 \u0000 <p>Trophic structures were assessed for 15,265 species, including 9993 non-marine birds and 5272 terrestrial mammals, across 9 predefined trophic guilds.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>A spatially explicit community trophic structure model was implemented using the extreme gradient boosting algorithm (Xgboost). The model was trained using 1990 climatic data and a subset of 6610 continental cells partially or fully overlapping with protected areas. It was subsequently used to project current and future changes in trophic structures under three Shared Socioeconomic Pathways: SSP2-45, SSP3-70 and SSP5-85.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The Xgboost model showed high predictive accuracy (86%, kappa = 0.91). Projections reveal extinction pressures concentrated in tropical and subtropical regions, disproportionately affecting specialised guilds such as frugivores and invertivores, while colonisation pressures predominantly occur in boreal, temperate and high-altitude regions, such as the Andes and the Himalayas, favouring invertivores, plant-invertivores and granivores. By the end of the century, significant trophic reorganisations are projected, potentially leading to a global homogenisation of trophic structures.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Climate change is driving significant transformations in trophic communities globally, with uneven effects across regions and trophic guilds. These reorganisations highlight the vulnerability of specialised guilds and the potential expansion of more generalist ones. Integrating community trophic structure models (CTSMs) into biodiversity conservation strategies is ","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 6","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939621","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":"Seed Mass Variations of Angiosperms and the Differences in Their Primary Drivers Across Climate Regions in China","authors":"Nannan An,&nbsp;Nan Lu,&nbsp;Mengyu Wang,&nbsp;Fuzhong Wu,&nbsp;Kai Yue,&nbsp;Bojie Fu","doi":"10.1111/jbi.15114","DOIUrl":"https://doi.org/10.1111/jbi.15114","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Seed mass is a key reproductive trait and is closely related to seed dispersal, germination, seedling growth and competition capability. Characterising the geographical pattern and the primary factors of seed mass variation is crucial for understanding plant reproductive strategy under heterogeneous environments. However, how the environment, phylogeny and life history traits simultaneously affect the variation in seed mass in China and their differences across climate regions remains unclear.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>China.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Major Taxa Studied</h3>\u0000 \u0000 <p>Angiosperm species.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We compiled a database on seed mass comprising 4569 observations that belong to 2064 angiosperms from 1152 sampling sites in China. A phylogenetic linear mixed model was used to disentangle the relative contributions of environment, phylogeny and life history traits (i.e. plant growth form, fruit type and dispersal mode) to seed mass variation. This analysis was conducted on a national scale and four climate regions, including tropical, subtropical, temperate and plateau regions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Seed mass was significantly associated with annual climatic averages and climate variability and seasonality variables. Soil pH was strongly related to seed mass, while soil nutrients were not. Environment, phylogeny and life history traits together explained 75.3%–86.6% of the total variation in seed mass in China and four climate regions. Life history traits and phylogeny were the most important factors of seed mass variation in China and most climate regions (14.2%–30.1% and 8.0%–19.7%, respectively) except for the tropical region. In the tropical region, environment was the strongest driver of seed mass variation (52.6%).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusion</h3>\u0000 \u0000 <p>Our study emphasised the differences in environmental and ecological effects on seed mass under heterogeneous climatic contexts and provided a reference for continued research on the complex interactions between plant reproductive strategy, evolutionary process and the environment.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 6","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939673","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":"Phyloregions in American Mammals: Contrasting Biogeographical Patterns With the Evolutionary Histories of Lineages","authors":"Adriana Ruggiero,&nbsp;Juan J. Morrone","doi":"10.1111/jbi.15115","DOIUrl":"https://doi.org/10.1111/jbi.15115","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 compare mammal phylogenetic regionalisation with previous biogeographical maps obtained from the distributional overlap of endemic taxa, considering evolutionary affinities and phylogenetic uniqueness. To test whether there is correspondence between areas of endemism at different spatial scales and phyloregions, driven by unique species or phylogenetic lineages.&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 Americas.&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;Terrestrial mammals.&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;Distributional and phylogenetic data on 1782 mammal species of the Americas were used to identify spatial patterns in phylogenetic turnover (pβsim), which led to significant clustering of grid cells (phyloregions) to be compared with traditional biogeographical units. Evolutionary Correspondence Analysis (evoCA) was applied to reveal significant evolutionary divergences among phyloregions, driven by unique species or phylogenetic lineages.&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;High explained variance in phylogenetic turnover confirmed robust phyloregions throughout all the analyses performed. Eight distinct phyloregions emerged from all mammals analysed together, but particular mammal lineages showed unique phyloregions. The eight phyloregions clustered into major biogeographical units based on evolutionary affinities, confirming known biogeographical patterns. We found notable evolutionary affinities within the Nearctic, Neotropical, and Andean regions. A complex pattern of overlapping boundaries at the Mexican Transition Zone marked biogeographical transitions between the Nearctic and Neotropical regions. Smooth boundary transitions occurred in the South American Transition Zone between the Neotropical and Andean regions. The evoCA revealed a significant evolutionary divergence between the Antillean and continental phyloregions, primarily driven by unique species. Continental regionalisation was shaped by more complex patterns of variation in phylogenetic composition, rather than being dominated by a few dominant species or lineages.&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;Phylogenetic regionalization, both considering all the taxa together and particular lineages, is a useful tool for biogeography and conservation biology. Contrasting this approach with traditional biogeographical regionalization allows a more nuanced understanding of evolutionary processes and historical events that s","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 6","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939676","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":"Around the World in 26 Million Years: Diversification and Biogeography of Pantropical Grass-Yellow Eurema Butterflies (Pieridae: Coliadinae)","authors":"Jing V. Leong,&nbsp;Pável Matos-Maraví,&nbsp;Rayner Núñez,&nbsp;Renato Nunes,&nbsp;Weijun Liang,&nbsp;Michael F. Braby,&nbsp;Tenzing Doleck,&nbsp;Kwaku Aduse-Poku,&nbsp;Yutaka Inayoshi,&nbsp;Yu-Feng Hsu,&nbsp;Niklas Wahlberg,&nbsp;Djunijanti Peggie,&nbsp;Alma B. Mohagan,&nbsp;Dave P. Mohagan,&nbsp;Julio A. Genaro,&nbsp;Antonio R. Perez-Asso,&nbsp;Krushnamegh Kunte,&nbsp;Dino J. Martins,&nbsp;Szabolcs Sáfián,&nbsp;Akito Y. Kawahara,&nbsp;Naomi E. Pierce,&nbsp;David J. Lohman","doi":"10.1111/jbi.15107","DOIUrl":"https://doi.org/10.1111/jbi.15107","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;Grass-yellow butterflies (&lt;i&gt;Eurema&lt;/i&gt;) are a group of pantropical Pieridae distributed throughout Asia, Australasia, Africa and the New World. However, little is known about their diversification, including the biogeographic mechanism(s) explaining their circumglobal distribution. We present the first densely sampled, time-calibrated phylogeny and biogeographic reconstruction of grass-yellows to confirm the monophyly of the genera, re-evaluate their taxonomy and infer the biogeographic events contributing to their worldwide distribution.&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;Global tropics and subtropics.&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 butterfly tribe Euremini (Pieridae: Coliadinae).&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 analysed up to 391 genetic loci from 126 samples of 66 ingroup species. Divergence dating was accomplished in a Bayesian phylogenetic framework using secondary calibration points, and maximum likelihood models of various biogeographic models were fitted to the data using the R package BioGeoBEARS. We used the best fitting model to estimate relative dispersal events with biogeographical stochastic mapping. Finally, we estimated branch-specific speciation and extinction rates to assess the diversification history of the group.&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;Different phylogenomic analyses converged on similar topologies with robust support. Grass-yellows emerged &lt;i&gt;ca&lt;/i&gt;. 26 Mya in the New World, and a single extant lineage dispersed to Asia in the early Miocene, where they diversified and dispersed to Africa and Australasia. The fastest rates of diversification occurred in the Old World tropics during the late Miocene. Many of the grass-yellow genera were either paraphyletic or polyphyletic as traditionally circumscribed. To maintain nomenclatural stability, we place all grass-yellows in &lt;i&gt;Eurema sensu lato&lt;/i&gt; and recognise two subgenera: &lt;i&gt;Eurema&lt;/i&gt; (&lt;i&gt;Abaeis&lt;/i&gt;) and &lt;i&gt;Eurema&lt;/i&gt; (&lt;i&gt;Eurema&lt;/i&gt;).&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;Grass-yellow butterflies originated in the Americas and attained their global distributional patterns via dispersal. The Indo-Australian and Caribbean archipelagoes seem to have accelerated the diversification of the group, and movement in and out of these island regions was frequent. Althoug","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 5","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.15107","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143846251","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":"Historical Biogeography, Speciation, and Niche Evolution of Alouatta (Primates, Atelidae)","authors":"J. B. Schwantes,&nbsp;L. A. Antunes,&nbsp;V. B. Fortes,&nbsp;D. A. S. Graichen,&nbsp;L. J. Robe","doi":"10.1111/jbi.15110","DOIUrl":"https://doi.org/10.1111/jbi.15110","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>This study aims to evaluate the biogeographical and ecological patterns associated with the diversification and distribution of <i>Alouatta</i> species, commonly known as howler monkeys. Our research provides valuable insights into the comprehension of the evolutionary history of this genus.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Local</h3>\u0000 \u0000 <p>Neotropical region.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Time Period</h3>\u0000 \u0000 <p>Last 13 Mya.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Major Taxa Studied</h3>\u0000 \u0000 <p>11 species of <i>Alouatta</i>.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>A dataset including 32 nuclear and mitochondrial genes was employed to reconstruct a dated maximum composite phylogenetic tree. Contemporary biodiversity data were employed in the context of this phylogenetic tree to reconstruct ancestral distribution and to infer the main speciation mechanisms. Niche evolution tests were performed for different bioclimatic and topographic variables to access patterns of niche divergence or niche conservatism.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The diversification of <i>Alouatta</i> seems to have started ~13 Mya, probably near the Northwestern Amazon, and appears to have been driven mostly by niche divergence in parapatry. Despite this, niche conservatism or convergence led to significant overlap in ecological niches between some species, particularly those representing the early divergences of both South American clades.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>The parapatric distribution presented by several pairs of <i>Alouatta</i> species generally evolved through environmental niche divergence driven by dispersal. The conservation or convergence of some niche traits is correlated with some secondary contacts, which may be increasing due to habitat loss. Niche conservation patterns found for some climatic variables highlight the susceptibility of the genus to climate change.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 5","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143846252","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":"Cephalopod Distribution in the Canary Current: Latitudinal and Bathymetric Patterns","authors":"Amanda Luna,&nbsp;Francisco Rocha","doi":"10.1111/jbi.15112","DOIUrl":"https://doi.org/10.1111/jbi.15112","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>The Canary Current Large Marine Ecosystem (CCLME) is one of the four major marine upwelling systems worldwide. Cephalopods in this region exhibit high diversity and abundance, but the distributional patterns of most species are largely unknown. The present study updated the latitudinal and bathymetric distributions cephalopods species in the CCLME.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Northwest Atlantic coast of Africa.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Ninety species of Cephalopoda.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We use data from specimens collected in 10 bottom trawl surveys (2004–2012) along the coast, developed in the continental shelf and slope (20–2000 m). Only data from specimens identified to species level were considered. For bathymetric analysis data and literature widest depth range for each species were used. If our data fall outside of literature range, the depth range of the species was extended. A presence/absence matrix of species was determined to study their latitudinal distribution. In addition, species were also categorised as coastal or oceanic based on their relationship with the continental shelf and/or slope, regardless of their benthic or pelagic habits.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The continental shelf is dominated by species from the Sepiidae, Loliginidae and Octopodidae. In contrast, species from the Octopodidae and Cranchiidae are predominant in slope waters. The dominant species on both the shelf and slope belonged to the families Octopodidae, Ommastrephidae and Sepiolidae. The bathymetric distribution of 13 cephalopod species was extended. The latitudinal distribution of <i>Eledone cirrhosa</i>, <i>Ommastrephes cylindraceus</i>, <i>Ommastrephes caroli</i> and <i>Onykia robsoni,</i> was extended. Clear differences in species composition were found between northern and southern of Cape Blanc.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>This work provides a complete analysis of the latitudinal and bathymetric distributions of Cephalopoda species currently recorded in the CCLME, with special attention given to the differences in Cephalopoda composition between northern and southern Cape Blanc in Mauritania. No similar studies on cephalopods exist in the full area.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 5","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143846052","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":"Stream Co-Occurrence Networks Depend on Spatial Extent, Environmental Conditions and Organismal Group","authors":"William R. Budnick,&nbsp;Joseph L. Mruzek,&nbsp;Chad A. Larson,&nbsp;Thibault Leboucher,&nbsp;Sophia I. Passy","doi":"10.1111/jbi.15106","DOIUrl":"https://doi.org/10.1111/jbi.15106","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Co-occurrence networks can be described in terms of topology (i.e., size and connectance) and node degree distribution (NDD). The NDD represents the frequency distribution of nodes (species) with <i>k</i> number of connections (degree). The shape of the NDD, single-scale, scale-free (power-law) or broad-scale, reveals if there are species with many connections to other species (high-degree nodes), which may have important ecological functions. However, it remains unknown how spatial extent and environmental conditions impact network topology and the NDD shape and whether these relationships depend on species dispersal capacity.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Continental United States of America.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxa</h3>\u0000 \u0000 <p>Stream diatoms and fish.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We constructed landscape windows ranging in spatial extent from 160,000 to 2,560,000 km². For each window, we calculated environmental heterogeneity and median environmental conditions and generated correlation-based co-occurrence networks. We evaluated the topology and NDD shape of each network. To each NDD, we fit six statistical models, classified as single-scale, power-law or broad-scale. Contingency table analysis, redundancy analyses and variance partitioning tested the sources of variability in network topology and/or NDD shape.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The NDDs were almost exclusively fit either by single-scale + broad-scale models or broad-scale models. As spatial extent increased, network size increased, connectance decreased, and the NDD shifted in an organism-specific manner. In both groups, network responses to spatial extent were attributed primarily to variability in climatic heterogeneity followed by urban development in diatoms.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Spatial extent determined co-occurrence network properties primarily via climatic and land use factors. Broad-scale NDDs, indicating the presence of high-degree nodes, were more common in the well-dispersed diatoms than in the more poorly dispersing fish. Furthermore, these NDDs increased in frequency with spatial extent and climatic heterogeneity in diatoms but decreased in fish. High-degree nodes are likely climatic generalists in diatoms but keystone or more dispersive species in fish.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 5","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845924","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":"Geomorphological River Characteristics Explain Species Turnover in Amphibians, Reptiles and Lemurs in Madagascar's Eastern Rainforests","authors":"Dominik Schüßler,&nbsp;Jonas Bremer,&nbsp;Martin Sauerwein,&nbsp;Ute Radespiel","doi":"10.1111/jbi.15109","DOIUrl":"https://doi.org/10.1111/jbi.15109","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;The riverine barrier hypothesis is often tested as a driver for allopatric speciation. Rivers are usually treated as static landscape features characterised by their width and elevation of their headwaters. We aim to investigate the role of rivers as barriers using a comprehensive database of geomorphological characteristics by assessing their influence on species turnover rates.&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;Eastern Madagascar.&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;Sixty-two taxa from 11 genera of lemurs, amphibians and reptiles.&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 21 geomorphological variables for 45 major rivers, estimated species turnover rates from species assemblages on either side and modelled the influence of river characteristics on species diversity. Topographic depressions, identified from longitudinal river profiles, and landscape heterogeneity were further analysed as potential palaeoclimatic refugia and alternative speciation drivers.&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;A total of 24 rivers acted as species barriers. Three of these had disproportionately high species turnover rates and shared a set of distinct geomorphological features like the maximum elevation of the watershed, high flow accumulation values at the outlet and at an elevation of 800 m and a high concavity of the longitudinal river profile. Other variables like landscape heterogeneity along the main river channel and length of the coastal plain further helped to differentiate between rivers with intermediate turnover rates. Species richness peaked in northeastern Madagascar, a region with the highest abundance of topographic depressions and inferred palaeo-wetlands.&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;Geomorphological river characteristics effectively explained variations in species turnover rates. However, it remains uncertain whether rivers functioned as secondary dispersal barriers and thereby maintainers of species diversity, rather than as primary drivers of allopatric speciation. Additionally, we emphasise the role of refugia during palaeoclimatic oscillations, which are often associated with topographic depressions. Overall, integrating rivers as dynamic fluvial systems through space and time into biogeographic studies offers valuable insights into speciati","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 5","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.15109","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845923","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":"Sugar-Rich Resources Mediate Geographic Morphological Variation in a Dominant, Neotropical Savanna Ant","authors":"Marianne Azevedo-Silva,&nbsp;Sebastian F. Sendoya,&nbsp;Marina C. Côrtes,&nbsp;Pedro A. S. Longo,&nbsp;Anselmo Nogueira,&nbsp;Gustavo M. Mori,&nbsp;Shun K. Hirota,&nbsp;Yoshihisa Suyama,&nbsp;Anete P. Souza,&nbsp;Paulo S. Oliveira","doi":"10.1111/jbi.15111","DOIUrl":"https://doi.org/10.1111/jbi.15111","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;Trait variation across geographic gradients can reveal how species respond to different environmental settings, which is crucial under the growing threat of climate change. Although on the basis of evolutionary theory, the patterns and drivers of intraspecific functional variation remain largely underexplored. In ants, pilosity and body size are morphological traits associated to thermoregulation and heat tolerance, which are critical concerns in the context of global warming. Here, we focused on the dominant ant &lt;i&gt;Camponotus crassus&lt;/i&gt; to investigate trait variation and its potential drivers across a latitudinal gradient in the Brazilian Cerrado savanna.&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;Brazilian Cerrado savanna.&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;Camponotus crassus&lt;/i&gt; Mayr, 1862 (Hymenoptera: Formicidae).&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 measured mesosoma pilosity and body size of &lt;i&gt;C. crassus&lt;/i&gt; across multiple sites, and evaluated their relationship with &lt;i&gt;temperature, rainfall, solar radiation, vegetation&lt;/i&gt; and &lt;i&gt;sugar-rich resource&lt;/i&gt; variables. We also assessed morphological and genetic covariation to search for possible phenotypic plasticity or adaptation in &lt;i&gt;C. crassus&lt;/i&gt;.&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;Only sugar-rich resources were found to significantly influence &lt;i&gt;C. crassus&lt;/i&gt; pilosity. Specifically, a negative relationship between ant pilosity and &lt;i&gt;sugar-rich resources&lt;/i&gt; (i.e., proportion of plants with extrafloral nectaries and hemipteran trophobionts) was found. No covariation between pilosity and genetic dissimilarities was observed, suggesting phenotypic plasticity. None of the variables were significant to predict body size, while this trait positively covaried with genetics.&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 suggest resource availability as a critical factor for species thermoregulation under environmental change, a hypothesis previously reported in the literature. We emphasise the importance of examining intraspecific variation and phenotypic plasticity across large geographic scales, particularly under the scenario of rapid global change and the current threat to Cerrado savanna. Our work covers a still poorly investigated aspect of intraspecific variation of tropical eusocial insects,","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 5","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.15111","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845848","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":"Composition and Functional Diversity of Juvenile Groundfish Assemblages in the California Current","authors":"Ryan Gasbarro,&nbsp;Jarrod A. Santora,&nbsp;Megan Cimino,&nbsp;Adena Schonfeld,&nbsp;Steven J. Bograd,&nbsp;Elliott L. Hazen,&nbsp;Brian K. Wells,&nbsp;John C. Field","doi":"10.1111/jbi.15108","DOIUrl":"https://doi.org/10.1111/jbi.15108","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;Long-term monitoring data at the biogeographic scale are essential for developing baselines of biodiversity patterns and tools to diagnose natural cycles, trends, and anomalous events to assess threats from climate change. However, studies using these data often limit their analyses to relatively few metrics that may not adequately capture the breadth of biodiversity. Here, we calculate a suite of compositional and functional biodiversity metrics—collectively comprising ecoscapes—to better resolve assemblage-level responses to environmental variability and test the spatiotemporal lability of faunal biogeographic provinces.&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;California Current Large Marine Ecosystem (CCLME).&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;Young-of-the-year juvenile groundfish assemblages (&lt;i&gt;n&lt;/i&gt; = 45 taxa).&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;Species composition and abundance data from two long-term fisheries-independent surveys were collated with a functional trait database for pelagic taxa. Distinct assemblages were identified through cluster analysis. Compositional and functional alpha- and beta-level biodiversity metrics were then calculated to characterise assemblage-level biodiversity and to identify patterns of regional community composition and turnover in space and time.&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;Ecoscapes revealed the assemblage structure, functional diversity, and turnover of juvenile groundfish from 1990 to 2023. Canonical CCLME biogeographic provinces were mostly supported, but with notable spatiotemporal variation and differences across compositional and functional diversity metrics. Highly productive (unproductive) years were associated with the widespread extent of assemblages characterised by high (low) biodiversity and abundance.&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;The differences between patterns of functional and compositional diversity of assemblages highlight the potential of ecoscapes to better resolve biogeographic patterns with promising applications for future studies. Ecoscapes may provide explicit links between biodiversity and ecosystem functioning and services, and additional insights into assemblage responses and resilience to environmental variability that can aid biodiversity monitoring and rapidly disseminate","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 5","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.15108","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845988","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}