Journal of Biogeography最新文献

{"title":"Mapping Italy's Sacred Natural Sites to Support the Establishment of Other Effective Area-Based Conservation Measures (OECMs)","authors":"Lorenzo Ricci, Piero Zannini, Michele Di Musciano, Carlo Rondinini, Moreno Di Marco, Luca Santini, Michela Pacifici, Michele Lussu, Duccio Rocchini, Fabrizio Frascaroli, Alessandro Chiarucci","doi":"10.1111/jbi.70270","DOIUrl":"https://doi.org/10.1111/jbi.70270","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Sacred natural sites (SNS) are culturally governed places that often retain remnants of natural vegetation, safeguard species of conservation concern and maintain landscape continuity, positioning them as potential Other Effective Area-Based Conservation Measures (OECMs). Despite increasing ecological interest, national datasets remain unavailable, limiting reproducibility of studies and preventing systematic evaluation of SNS as OECMs. Here we release the first harmonised, openly accessible, geospatial inventory of SNS in Italy, comprising 2332 records, explicitly designed to support their assessment as potential OECMs at the national scale. The dataset provides detailed information on the types of SNS, their ecological attributes and their landscape context, offering a valuable resource for biodiversity conservation, enabling systematic evaluation of SNS within conservation planning applications, as well as research in biogeography, landscape ecology and biocultural science.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Italy.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Feature</h3>\u0000 \u0000 <p>SNS of Catholic tradition (e.g., shrines, hermitages, monasteries, chapels, pilgrimage sites, groves, springs).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>The dataset derives from a standardised nationwide identification protocol combining documentary sources, remote-sensing geolocation and land cover filtering to identify sites embedded within natural or semi-natural landscapes. We provide a georeferenced point vector dataset, with each point representing the location of an SNS. For each site, we report geographic coordinates, elevation, bioclimatic variables, proximity to road infrastructure, surrounding land cover composition and indicators of formal protection status.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The dataset contains 2332 georeferenced SNS distributed across Italy, mainly concentrated in central and northern regions. Only a small proportion of SNS occur within protected areas (17%), with the greatest proportion corresponding to sites lacking an assigned IUCN category (38%). SNS are predominantly situated at low- to mid-elevations (mean = 458 m, SD = 343 m) and in landscapes dominated by agricultural (45%) and natural land covers (38%). Their climatic space overlaps with, but extends beyond, that encompassed by the protected area network, indicating potential complementarity in conservation representation.</p>\u0000 ","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 6","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.70270","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237759","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":"Mapping Italy's Sacred Natural Sites to Support the Establishment of Other Effective Area-Based Conservation Measures (OECMs)","authors":"Lorenzo Ricci, Piero Zannini, Michele Di Musciano, Carlo Rondinini, Moreno Di Marco, Luca Santini, Michela Pacifici, Michele Lussu, Duccio Rocchini, Fabrizio Frascaroli, Alessandro Chiarucci","doi":"10.1111/jbi.70270","DOIUrl":"https://doi.org/10.1111/jbi.70270","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Sacred natural sites (SNS) are culturally governed places that often retain remnants of natural vegetation, safeguard species of conservation concern and maintain landscape continuity, positioning them as potential Other Effective Area-Based Conservation Measures (OECMs). Despite increasing ecological interest, national datasets remain unavailable, limiting reproducibility of studies and preventing systematic evaluation of SNS as OECMs. Here we release the first harmonised, openly accessible, geospatial inventory of SNS in Italy, comprising 2332 records, explicitly designed to support their assessment as potential OECMs at the national scale. The dataset provides detailed information on the types of SNS, their ecological attributes and their landscape context, offering a valuable resource for biodiversity conservation, enabling systematic evaluation of SNS within conservation planning applications, as well as research in biogeography, landscape ecology and biocultural science.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Italy.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Feature</h3>\u0000 \u0000 <p>SNS of Catholic tradition (e.g., shrines, hermitages, monasteries, chapels, pilgrimage sites, groves, springs).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>The dataset derives from a standardised nationwide identification protocol combining documentary sources, remote-sensing geolocation and land cover filtering to identify sites embedded within natural or semi-natural landscapes. We provide a georeferenced point vector dataset, with each point representing the location of an SNS. For each site, we report geographic coordinates, elevation, bioclimatic variables, proximity to road infrastructure, surrounding land cover composition and indicators of formal protection status.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The dataset contains 2332 georeferenced SNS distributed across Italy, mainly concentrated in central and northern regions. Only a small proportion of SNS occur within protected areas (17%), with the greatest proportion corresponding to sites lacking an assigned IUCN category (38%). SNS are predominantly situated at low- to mid-elevations (mean = 458 m, SD = 343 m) and in landscapes dominated by agricultural (45%) and natural land covers (38%). Their climatic space overlaps with, but extends beyond, that encompassed by the protected area network, indicating potential complementarity in conservation representation.</p>\u0000 ","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 6","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.70270","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237971","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":"Scale-Dependent Shifts in Demographic and Environmental Control of Temporal β-Diversity","authors":"Cristina M. Jacobi, Tadeu Siqueira","doi":"10.1111/jbi.70276","DOIUrl":"https://doi.org/10.1111/jbi.70276","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>We investigated whether the relative influence of demographic stochasticity and environmental forcing on compositional dynamics shifts across scales.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Riverine fish communities sampled across 39 regions in three biogeographic realms.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Time Period</h3>\u0000 \u0000 <p>1981–2019.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Major Taxa Studied</h3>\u0000 \u0000 <p>Freshwater fish.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We first used simulations without environmental selection to assess whether temporal β-diversity metrics capture demographic variability independent of community sizes. We then analysed 468 fish community time series, modelling local temporal β-diversity and regional temporal changes in spatial β-diversity as functions of community size, its temporal variability, species richness, rarity, and environmental variation and synchrony.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Simulations showed that a rank-change metric was not intrinsically biased by community size. Empirical analyses revealed scale dependence in the processes shaping compositional temporal variability. Locally, smaller median community size and higher abundance fluctuations increased temporal β-diversity, consistent with stronger demographic stochasticity in small communities. Temperature seasonality emerged as the strongest climatic correlate of local temporal β-diversity, with more seasonal environments exhibiting greater inter-annual compositional change. Mean annual temperature and species richness also showed positive effects. In contrast, internal community properties did not predict regional dynamics. Instead, spatial synchrony of precipitation was the main predictor. More synchronized environments exhibited lower temporal variability in among-site dissimilarity, consistent with Moran-type environmental forcing constraining spatial β-diversity.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Our findings reveal a scale-dependent shift in the processes shaping compositional dynamics, with demographic stochasticity and climatic regime jointly structuring local compositional dynamics, whereas environmental synchrony dominates regional variability. These findings link demographic and environmental perspectives, clarifying how biodiversity change propagates across scales under declining populations and increasingly variable climat","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 6","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237619","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":"Climatic Niche Modelling Reveals Limited Phylogenetic Niche Conservatism in New World Crocodylians","authors":"Andrés L. Rodriguez-Cordero, Nancy E. McIntyre, Richard D. Stevens, Joseph D. Manthey, Carlos Portillo-Quintero, Natasja Van Gestel, Sergio A. Balaguera-Reina, Brandon A. Gross, Margaret Munn, Llewellyn D. Densmore III","doi":"10.1111/jbi.70275","DOIUrl":"https://doi.org/10.1111/jbi.70275","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Phylogenetic niche conservatism, the tendency of closely related species to retain ancestral ecological traits, has gained considerable interest, yet the lack of integration across independent evaluation methods has hindered our understanding of whether niches are conserved or dynamic. Such an understanding is especially relevant for taxa of conservation concern, such as crocodylians (order Crocodylia). This study assessed niche conservatism among New World crocodylians by combining ensemble species distribution models, phylogenetics, and standard metrics of geographic and environmental niche overlap.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>America.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Major Taxa</h3>\u0000 \u0000 <p>Order Crocodylia.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We estimated species' climatic niches in geographic and environmental dimensions to assess overlap patterns and quantified associations between niche overlap and phylogenetic patristic distance using the Mantel test and phylogenetic independent contrast (PIC).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Overlap analyses in geographic and environmental spaces revealed climatic niche differentiation across the clade, suggesting divergent environmental preferences among species. The relationship between phylogenetic patristic distance and climatic niche overlap assessed via Mantel tests revealed a significant negative correlation with geographic niche overlap (<i>ρ</i> = −0.361, <i>p</i> = 0.005), but no evidence for associations with environmental niche overlap (Schoener's D: <i>ρ</i> = −0.079, <i>p</i> = 0.184; Hellinger's I: <i>ρ</i> = −0.063, <i>p</i> = 0.250), suggesting that more distantly related species overlap less geographically. In contrast, the relationship assessed using PIC revealed no evidence for associations between phylogenetic distance and either geographic (<i>ρ</i> = −0.200, <i>p</i> = 0.579) or environmental niche overlap (D: <i>ρ</i> = −0.294, <i>p</i> = 0.41; I: <i>ρ</i> = −0.319, <i>p</i> = 0.369).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>We found no strong or consistent evidence for phylogenetic conservatism in climatic niches across both geographic (inverse relationship) and environmental (no relationship) dimensions in New World crocodylians. This study enhances our understanding of niche dynamics and highlights the v","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 6","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.70275","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237873","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":"Scale-Dependent Shifts in Demographic and Environmental Control of Temporal β-Diversity","authors":"Cristina M. Jacobi, Tadeu Siqueira","doi":"10.1111/jbi.70276","DOIUrl":"https://doi.org/10.1111/jbi.70276","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>We investigated whether the relative influence of demographic stochasticity and environmental forcing on compositional dynamics shifts across scales.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Riverine fish communities sampled across 39 regions in three biogeographic realms.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Time Period</h3>\u0000 \u0000 <p>1981–2019.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Major Taxa Studied</h3>\u0000 \u0000 <p>Freshwater fish.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We first used simulations without environmental selection to assess whether temporal β-diversity metrics capture demographic variability independent of community sizes. We then analysed 468 fish community time series, modelling local temporal β-diversity and regional temporal changes in spatial β-diversity as functions of community size, its temporal variability, species richness, rarity, and environmental variation and synchrony.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Simulations showed that a rank-change metric was not intrinsically biased by community size. Empirical analyses revealed scale dependence in the processes shaping compositional temporal variability. Locally, smaller median community size and higher abundance fluctuations increased temporal β-diversity, consistent with stronger demographic stochasticity in small communities. Temperature seasonality emerged as the strongest climatic correlate of local temporal β-diversity, with more seasonal environments exhibiting greater inter-annual compositional change. Mean annual temperature and species richness also showed positive effects. In contrast, internal community properties did not predict regional dynamics. Instead, spatial synchrony of precipitation was the main predictor. More synchronized environments exhibited lower temporal variability in among-site dissimilarity, consistent with Moran-type environmental forcing constraining spatial β-diversity.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Our findings reveal a scale-dependent shift in the processes shaping compositional dynamics, with demographic stochasticity and climatic regime jointly structuring local compositional dynamics, whereas environmental synchrony dominates regional variability. These findings link demographic and environmental perspectives, clarifying how biodiversity change propagates across scales under declining populations and increasingly variable climat","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 6","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237729","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":"Climatic Niche Modelling Reveals Limited Phylogenetic Niche Conservatism in New World Crocodylians","authors":"Andrés L. Rodriguez-Cordero, Nancy E. McIntyre, Richard D. Stevens, Joseph D. Manthey, Carlos Portillo-Quintero, Natasja Van Gestel, Sergio A. Balaguera-Reina, Brandon A. Gross, Margaret Munn, Llewellyn D. Densmore III","doi":"10.1111/jbi.70275","DOIUrl":"https://doi.org/10.1111/jbi.70275","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Phylogenetic niche conservatism, the tendency of closely related species to retain ancestral ecological traits, has gained considerable interest, yet the lack of integration across independent evaluation methods has hindered our understanding of whether niches are conserved or dynamic. Such an understanding is especially relevant for taxa of conservation concern, such as crocodylians (order Crocodylia). This study assessed niche conservatism among New World crocodylians by combining ensemble species distribution models, phylogenetics, and standard metrics of geographic and environmental niche overlap.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>America.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Major Taxa</h3>\u0000 \u0000 <p>Order Crocodylia.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We estimated species' climatic niches in geographic and environmental dimensions to assess overlap patterns and quantified associations between niche overlap and phylogenetic patristic distance using the Mantel test and phylogenetic independent contrast (PIC).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Overlap analyses in geographic and environmental spaces revealed climatic niche differentiation across the clade, suggesting divergent environmental preferences among species. The relationship between phylogenetic patristic distance and climatic niche overlap assessed via Mantel tests revealed a significant negative correlation with geographic niche overlap (<i>ρ</i> = −0.361, <i>p</i> = 0.005), but no evidence for associations with environmental niche overlap (Schoener's D: <i>ρ</i> = −0.079, <i>p</i> = 0.184; Hellinger's I: <i>ρ</i> = −0.063, <i>p</i> = 0.250), suggesting that more distantly related species overlap less geographically. In contrast, the relationship assessed using PIC revealed no evidence for associations between phylogenetic distance and either geographic (<i>ρ</i> = −0.200, <i>p</i> = 0.579) or environmental niche overlap (D: <i>ρ</i> = −0.294, <i>p</i> = 0.41; I: <i>ρ</i> = −0.319, <i>p</i> = 0.369).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>We found no strong or consistent evidence for phylogenetic conservatism in climatic niches across both geographic (inverse relationship) and environmental (no relationship) dimensions in New World crocodylians. This study enhances our understanding of niche dynamics and highlights the v","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 6","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.70275","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237872","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":"Environmental Niche and Species Distribution Modelling of Hawaiian Megalagrion Damselflies (Pinapinao, Odonata: Coenagrionidae)","authors":"Robert Hadfield,&nbsp;Laura N. Sutherland,&nbsp;Dan Polhemus,&nbsp;Steve Jordan,&nbsp;Seth Bybee","doi":"10.1111/jbi.70266","DOIUrl":"https://doi.org/10.1111/jbi.70266","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>We model the ecological niches and geographic distributions of 22 of 23 Megalagrion damselfly species and explore ecological and evolutionary hypotheses that may explain patterns of diversity.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>The Hawaiian Archipelago (Kaua‘i, O‘ahu, Moloka‘i, Lāna‘i, Maui, Hawai‘i).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Megalagrion damselflies (Odonata: Coenagrionidae) are an endemic Hawaiian radiation of 23 species.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We gathered occurrence data from GBIF, iNaturalist, museum collections, and field surveys. Species distribution models were constructed using generalized linear models (GLM) and MaxNet with 10 environmental variables. Models were evaluated using AUC and TSS. Species richness, corrected weighted endemism, and phylogenetic diversity were calculated from stacked SDMs.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>MaxNet models generally outperformed GLMs. Species richness, endemism, and phylogenetic diversity increase with island age from Hawai‘i to Kaua‘i, with highest values at mid-to-high elevations. Most species showed positive relationships with slope and elevation and negative relationships with solar radiation. Notable exceptions include <i>M. xanthomelas</i> and <i>M. pacificum</i>, which prefer low-elevation lotic habitats. Three closely related seep-breeding Kaua‘i endemics (<i>M. adytum</i>, <i>M. eudytum</i>, <i>M. vagabundum</i>) exhibit distinct modelled environmental niches and distributions that may reflect ecological diversification within the clade.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Habitat suitability patterns are consistent with the island progression rule, with older islands supporting higher endemism due to greater habitat diversity and longer isolation. Ecological niche models provide a quantitative assessment of breeding habitat classifications and ecological diversity among species that breed in seep habitats on Kaua‘i. This study highlights how SDMs can inform conservation strategies and enhance understanding of adaptive radiations in island systems.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 6","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148174613","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":"Environmental Niche and Species Distribution Modelling of Hawaiian Megalagrion Damselflies (Pinapinao, Odonata: Coenagrionidae)","authors":"Robert Hadfield,&nbsp;Laura N. Sutherland,&nbsp;Dan Polhemus,&nbsp;Steve Jordan,&nbsp;Seth Bybee","doi":"10.1111/jbi.70266","DOIUrl":"https://doi.org/10.1111/jbi.70266","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>We model the ecological niches and geographic distributions of 22 of 23 Megalagrion damselfly species and explore ecological and evolutionary hypotheses that may explain patterns of diversity.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>The Hawaiian Archipelago (Kaua‘i, O‘ahu, Moloka‘i, Lāna‘i, Maui, Hawai‘i).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Megalagrion damselflies (Odonata: Coenagrionidae) are an endemic Hawaiian radiation of 23 species.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We gathered occurrence data from GBIF, iNaturalist, museum collections, and field surveys. Species distribution models were constructed using generalized linear models (GLM) and MaxNet with 10 environmental variables. Models were evaluated using AUC and TSS. Species richness, corrected weighted endemism, and phylogenetic diversity were calculated from stacked SDMs.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>MaxNet models generally outperformed GLMs. Species richness, endemism, and phylogenetic diversity increase with island age from Hawai‘i to Kaua‘i, with highest values at mid-to-high elevations. Most species showed positive relationships with slope and elevation and negative relationships with solar radiation. Notable exceptions include <i>M. xanthomelas</i> and <i>M. pacificum</i>, which prefer low-elevation lotic habitats. Three closely related seep-breeding Kaua‘i endemics (<i>M. adytum</i>, <i>M. eudytum</i>, <i>M. vagabundum</i>) exhibit distinct modelled environmental niches and distributions that may reflect ecological diversification within the clade.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Habitat suitability patterns are consistent with the island progression rule, with older islands supporting higher endemism due to greater habitat diversity and longer isolation. Ecological niche models provide a quantitative assessment of breeding habitat classifications and ecological diversity among species that breed in seep habitats on Kaua‘i. This study highlights how SDMs can inform conservation strategies and enhance understanding of adaptive radiations in island systems.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 6","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148174545","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":"Areas of Angiosperm Endemism and Floristic Regions in the USA","authors":"Anna Saghatelyan,&nbsp;Gerardo Rodríguez-Tapia,&nbsp;Tania Escalante","doi":"10.1111/jbi.70268","DOIUrl":"https://doi.org/10.1111/jbi.70268","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Insights into complex patterns of endemism are critical for reconstructing the historical assembly of a flora, guiding conservation strategies, and refining biogeographical regionalization. We analyzed a diverse dataset of mostly angiosperms (223,929 georeferenced records for 767 species in 93 families) to delineate areas of endemism and integrate them into a preliminary regionalization framework.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Southern North America.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We applied a computationally intensive grid-based endemicity analysis method across multiple spatial resolutions. It identifies areas of endemism, defined by optimal clusters of geographic cells maximizing species co-occurrence and exclusivity. We compared the identified areas with the most recent regionalization framework by dissolving grid cells and merging them into polygons, quantifying their areas, and integrating five area classes with Hausdorff distance measurements to align the results with the Nearctic regionalization.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>We detected 31 areas of endemism and 12 nested sub-areas in the Nearctic. These were mapped and integrated into a preliminary floristic regionalization, partitioning the region into three major areas: Northwestern and Eastern (Boreal Subkingdom) and Madrean (Madrean Subkingdom) of Takhtajan's Holarctic Kingdom. Across analyses, many areas with particularly high endemicity scores were recovered in the arid zones of the Madrean region, with a strong concentration of narrow endemics. The Madrean area comprised two major, nested or partially overlapping sub-areas—the Southwestern and Southcentral super areas. The Sonora–Mojave arid center and Chihuahuan Desert, California Floristic Province, and the forested Gulf Coastal Plain and Southern Appalachians emerged as the most significant areas of endemism.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Resolving fine-scale patterns of endemism is essential for delineation of provinces and subprovinces. Major U.S. floristic regions largely correspond to both classical and recent phylogenetically defined regionalization schemes. Phylogenetic evidence suggests that southern Nearctic harbours basally branching taxa across multiple lineages, offering key insights into North American floristic diversity and conservation priorities.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 6","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148174147","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":"Areas of Angiosperm Endemism and Floristic Regions in the USA","authors":"Anna Saghatelyan,&nbsp;Gerardo Rodríguez-Tapia,&nbsp;Tania Escalante","doi":"10.1111/jbi.70268","DOIUrl":"https://doi.org/10.1111/jbi.70268","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Insights into complex patterns of endemism are critical for reconstructing the historical assembly of a flora, guiding conservation strategies, and refining biogeographical regionalization. We analyzed a diverse dataset of mostly angiosperms (223,929 georeferenced records for 767 species in 93 families) to delineate areas of endemism and integrate them into a preliminary regionalization framework.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Southern North America.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We applied a computationally intensive grid-based endemicity analysis method across multiple spatial resolutions. It identifies areas of endemism, defined by optimal clusters of geographic cells maximizing species co-occurrence and exclusivity. We compared the identified areas with the most recent regionalization framework by dissolving grid cells and merging them into polygons, quantifying their areas, and integrating five area classes with Hausdorff distance measurements to align the results with the Nearctic regionalization.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>We detected 31 areas of endemism and 12 nested sub-areas in the Nearctic. These were mapped and integrated into a preliminary floristic regionalization, partitioning the region into three major areas: Northwestern and Eastern (Boreal Subkingdom) and Madrean (Madrean Subkingdom) of Takhtajan's Holarctic Kingdom. Across analyses, many areas with particularly high endemicity scores were recovered in the arid zones of the Madrean region, with a strong concentration of narrow endemics. The Madrean area comprised two major, nested or partially overlapping sub-areas—the Southwestern and Southcentral super areas. The Sonora–Mojave arid center and Chihuahuan Desert, California Floristic Province, and the forested Gulf Coastal Plain and Southern Appalachians emerged as the most significant areas of endemism.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Resolving fine-scale patterns of endemism is essential for delineation of provinces and subprovinces. Major U.S. floristic regions largely correspond to both classical and recent phylogenetically defined regionalization schemes. Phylogenetic evidence suggests that southern Nearctic harbours basally branching taxa across multiple lineages, offering key insights into North American floristic diversity and conservation priorities.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"53 6","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148174149","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}