Journal of Biogeography最新文献

{"title":"Deep Divergence and Phenotypic Stasis of a Paleogene Relic Species Complex of Bullhead Catfish Within Eastern China","authors":"Weihan Shao, Xingwei Cai, Jianyong Wu, E. Zhang","doi":"10.1111/jbi.15144","DOIUrl":"https://doi.org/10.1111/jbi.15144","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>The bullhead catfish <i>Tachysurus argentivittatus</i>, an early-diverging clade within the genus <i>Tachysurus</i>, exhibits characteristics indicative of an ancient origin and potential cryptic divergence. This study aims to elucidate the evolutionary processes underlying <i>T. argentivittatus</i> s.l. by examining the impacts of complex paleotectonic and drainage rearrangements in East Asia. Additionally, we aim to uncover potential cryptic diversity within this widespread species and explore the mechanisms behind its conserved morphology.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>East China.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Bullhead catfish <i>Tachysurus argentivittatus</i> (Siluriformes: Bagridae).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We sampled 302 individuals of the currently recognised <i>T. argentivittatus</i> from nine localities across East China, covering over 5000 km of its latitudinal range. A concatenated dataset of two mitochondrial and four nuclear genes was used for phylogenetic reconstruction using Bayesian inference (BI) and Maximum Likelihood (ML) methods. Divergence times between main lineages of <i>T. argentivittatus</i> s.l. were estimated with a mitochondrial two-gene concatenated dataset in BEAST v.2.5.2, applying four secondary calibration points. A 3D principal component analysis (PCA) of 26 morphological traits was employed to diagnose molecular operational taxonomic units (OTUs) identified in the phylogenetic analysis.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Molecular phylogenetic analyses revealed deep divergences within <i>T. argentivittatus</i> s.l., dating back to at least the early Miocene, resulting in three geographically isolated lineages. Coupled morphometric and meristic analyses indicate the subtle but consistent phenotypic differences among lineages. Our findings support the hypothesis that <i>T. argentivittatus</i> s.l. represents a species complex comprising three phenotypically similar yet distinct species. While <i>T. argentivittatus</i> s. str. is restricted to the Pearl River basin, populations from the Yangtze and Amur Rivers are recognised as a distinct species, <i>T. mica</i>, previously considered a synonym of <i>T. argentivittatus</i>. The population from Hainan Island represents a novel taxon, which should be formally described in future studies. We also discuss the biogeographical implications of our findings.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 ","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 8","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611992","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":"From Asia to the Americas: A New Cross-Continental Perspective on Viper Biogeography and Habitat Dynamics","authors":"Matheus Pontes-Nogueira,&nbsp;Laura R. V. Alencar,&nbsp;Ricardo J. Sawaya","doi":"10.1111/jbi.15153","DOIUrl":"https://doi.org/10.1111/jbi.15153","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>We investigate the biogeographical history of the family Viperidae, focusing on how habitat use influenced the geographical range evolution of the group. We tested key hypotheses on the origins and biogeographical processes of major clades within Viperidae, including the colonisation of the New World.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Worldwide.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Vipers (Serpentes: Viperidae).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We used four recently published phylogenies of Viperidae and applied maximum likelihood (ML) models with trait-specific parameters (habitats) in BioGeoBEARS to estimate ancestral geographical ranges and habitat use.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Our results support an Asian origin for the Viperidae family, with a likely trans-Pacific dispersal to Central America instead of the Beringian land bridge route. The subfamily Viperinae must have originated in Africa, while the genus Lachesis likely emerged in South + Central America. Habitat reconstructions showed varied impacts of forested and open habitats on diversification and biogeographical processes when comparing the first three phylogenies with the last one.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>We highlight the significant role of habitat use in viper diversification and range evolution. Differently from what was previously suggested, our findings indicate a trans-Pacific dispersal route for New World vipers.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 8","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Impact of Varying Spatiotemporal Scales on Different Joint Species Distribution Models: A Case Study of Pelagic Fish Species in the Northwest Pacific Ocean","authors":"Xingnan Fang,&nbsp;Ping Zhang,&nbsp;Qinwang Xing,&nbsp;Xinjun Chen,&nbsp;Jie Cao,&nbsp;Heng Zhang,&nbsp;Wei Yu","doi":"10.1111/jbi.15154","DOIUrl":"https://doi.org/10.1111/jbi.15154","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Joint Species Distribution Models (JSDMs) have become a critical tool in community ecology research, with a wide scope of application that is continuously expanding. However, inferring interspecies relationships from co-occurrence data remains a challenge. This study examined the impact of varying spatiotemporal scales on JSDMs, with a focus on model stability and the evaluation of interspecies relationships.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>The northwest Pacific Ocean.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Japanese sardine; Chub mackerel; Neon flying squid.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>To comprehensively evaluate the impact of varying spatiotemporal scales on JSDMs, this study was designed using two temporal scales (monthly and annual), four spatial scales (0.25°, 0.5°, 1°, and 2°), and four different JSDMs (Bayescomm, HMSC, Boral, and Gjam). Using three economically important pelagic fish species from the northwest Pacific Ocean as examples—Japanese sardine (<i>Sardinops melanostictus</i>), chub mackerel (<i>Scomber japonicus</i>), and neon flying squid (<i>Ommastrephes bartramii</i>)—we compared the performance of the models across 32 different spatiotemporal scales.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Our results indicate that the spatiotemporal scale significantly affects the performance of JSDMs, with notable differences among the models. As spatial scales become finer and temporal scales longer, model simulation and prediction performance improve, and stability increases. Moreover, spatial scale has a substantial impact on the evaluation of interspecies relationships, as finer spatial scales can better evaluate interspecific relationships. Among the models, HMSC demonstrated better balancing performance, while the Boral model showed the least stability. Overall, the optimal JSDM identified was the HMSC model with an annual temporal and 0.25° spatial scale.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Spatiotemporal scales have a significant impact on JSDMs, particularly when inferring the strength of interspecies relationships. Therefore, it is recommended that researchers carefully design the model based on the spatiotemporal scales of their data and select the optimal model to enhance predictive performance and improve the interpretative validity of the results.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 8","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611977","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":"Disentangling Direct and Indirect Effects of Temporal Isolation on the Multifaceted Diversity of Small Mammals on Land-Bridge Islands","authors":"Chengxiu Zhan,&nbsp;Yunhao Xu,&nbsp;Huiwen Zhu,&nbsp;Yanping Wang","doi":"10.1111/jbi.15148","DOIUrl":"https://doi.org/10.1111/jbi.15148","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>A major goal of island biogeography is to understand how island communities are assembled over time, and temporal isolation has been shown to affect species diversity. However, our knowledge of the indirect effect of temporal isolation on species diversity through other island characteristics is still limited, constraining our understanding of assembly processes on islands, particularly land-bridge islands. The purpose here was to disentangle the direct and indirect effects of temporal isolation on three dimensions of diversity (taxonomic, phylogenetic and functional diversity) of small mammals on land-bridge islands.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Zhoushan Archipelago, China.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p>Small mammals.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We performed small mammal censuses on 39 land-bridge islands and a nearby mainland site. We first used univariate linear regressions to test the relationships between diversity indices of small mammals and island characteristics, and then built piecewise structural equation models (SEMs) to disentangle direct and indirect effects of temporal isolation on multifaceted diversity.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>In line with our expectation, temporal isolation directly affected taxonomic diversity and indirectly affected all three dimensions of diversity. The indirect effects of temporal isolation arose because young islands have larger island area and lower spatial isolation than old ones, and larger or remoter islands suffer stronger human activities, all of which affect species diversity. Importantly, the indirect effects of temporal isolation were strong for all three dimensions of diversity.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The diversity indices respond differently to island characteristics, with mechanisms that directly and/or indirectly relate to temporal isolation. Future studies on temporal isolation effects should attempt to quantify indirect effects rather than only direct effects. Furthermore, considering multifaceted diversity will contribute to identifying the underlying processes for community assembly and planning effective conservation strategies for species diversity.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 7","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308831","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":"Niche Differentiation and Spatial Segregation of Melanistic and Non-Melanistic Colour Morphs in a Widespread Palearctic Reptile","authors":"Petronel Spaseni,&nbsp;Iulian Gherghel,&nbsp;Tiberiu C. Sahlean,&nbsp;Ștefan R. Zamfirescu,&nbsp;Andreea V. Vicol,&nbsp;Alexandru Strugariu","doi":"10.1111/jbi.15150","DOIUrl":"https://doi.org/10.1111/jbi.15150","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>This study investigates the spatial distribution and climatic niche differentiation between melanistic and non-melanistic colour morphs of the common adder (<i>Vipera berus</i>) across the species range. We aim to elucidate the role of environmental factors in shaping the geographic and ecological variation in colour polymorphism within this species.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>The Palearctic region.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We first compiled georeferenced occurrence records from citizen science databases to map the distribution of the common adder's melanistic and non-melanistic colour morphs (<i>V. berus</i>). Then, spatial point-pattern analyses were employed to assess the geographic segregation of the morphs. Climatic niche differentiation was quantified using both univariate density profiles and multivariate approaches. Niche equivalency and similarity tests were performed to determine the extent of overlap and divergence between the morphs' climatic niches.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The results reveal significant spatial segregation between melanistic and non-melanistic morphs, with melanistic individuals predominantly occurring in colder, more arid regions. Despite considerable geographic overlap, niche analyses indicate a marked climatic differentiation, with the melanistic morph occupying a narrower and more environmentally extreme niche compared to the non-melanistic morph. Niche similarity tests confirm that while the niches are distinct, they are more similar than would be expected by chance.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>The findings suggest that the observed geographic and ecological patterns of colour polymorphism in <i>V. berus</i> are shaped by climatic factors via local adaptation. The differential distribution of colour morphs likely reflects adaptive responses to temperature, precipitation and habitat structure, further refined by ecological mechanisms such as predation pressures and thermoregulatory trade-offs. These results provide a complementary perspective on adder polymorphism, supporting niche specialisation under climatic constraints, and highlighting the value of citizen science data in capturing large-scale phenotypic variation.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 7","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309199","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":"Metabolic Diversity of a Widely Distributed Tropical Freshwater Crab Is Not Underpinned by Genetic Differences","authors":"Lucy M. Turner,&nbsp;Christopher J. Thorpe,&nbsp;Michael Collins,&nbsp;Smrithy Raj,&nbsp;Tripti Shukla,&nbsp;John I. Spicer,&nbsp;Mairi E. Knight,&nbsp;Dheeraj Sharma,&nbsp;Krushnamegh Kunte","doi":"10.1111/jbi.15147","DOIUrl":"https://doi.org/10.1111/jbi.15147","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>The aim of this study was to understand the interplay between local and regional factors as drivers of population physiological diversity in a tropical freshwater crab species.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Western Ghats, south-west India.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Taxon</h3>\u0000 \u0000 <p><i>Barytelphusa cunicularis,</i> Brachyura, Crustacea.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We applied an integrative approach combining population genetics and whole animal physiology, using the tropical freshwater crab <i>Barytelphusa cunicularis</i> as our model species. We tested for effects of population location (e.g., latitude, altitude), season (as a proxy for rainfall and water temperature) and/or warming on indices of whole animal respiratory physiology (metabolic rate, MO₂) and hypoxic performance (P_crit, i.e., the PO₂ at which routine MO₂ can no longer be sustained) in five widely distributed populations of this species. We also generated population genetic data (mtDNA COI and nDNA histone H3 sequences) to determine the extent of any population genetic structuring and/or cryptic species diversity present to verify that we were investigating a single species.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Despite a high level of genetic structuring between the different populations of <i>B. cunicularis</i> examined, the genetic distances observed were consistent with intra- and not interspecific differences in freshwater crabs. Populations varied in the diversity of the physiological (MO₂) responses observed. There were significant effects of season and population on respiration in response to temperature and P_crit in response to acute hypoxia.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>We conclude that local environmental factors are important in shaping physiological diversity between populations in tropical freshwater species and systems. This highlights the need to include population-level responses in any projections we make on how biodiversity will respond to ongoing and future environmental changes, including those caused by climate change.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 7","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.15147","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309123","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":"Evolutionary Triggers of Plant Speciation in the Himalaya-Tibet-Hengduan Biodiversity Epicentre","authors":"Maharaj K. Pandit,&nbsp;Kumar Manish,&nbsp;Sandeep Sen,&nbsp;Kamaljit S. Bawa,&nbsp;Andrew H. Knoll,&nbsp;A. Alexander G. Webb,&nbsp;Peter D. Clift,&nbsp;Fabien L. Condamine,&nbsp;Carina Hoorn","doi":"10.1111/jbi.15152","DOIUrl":"https://doi.org/10.1111/jbi.15152","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Past studies linking geologic and climatic controls on speciation in the Himalaya, Tibet and Hengduan (HTH) regions do not fully capture the mechanisms underlying patterns of plant diversity and endemism in hyperdiverse mountain ecosystems.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Aims</h3>\u0000 \u0000 <p>This study sheds new light on the orogenic and climatic drivers of plant endemism and diversity in the HTH region and unravels the mechanisms behind plant speciation and assembly.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials &amp; Methods</h3>\u0000 \u0000 <p>We re-examine the past findings on geo-climatic controls on speciation in the HTH. We also analyse new datasets on the elevational patterns of endemic species richness in the HTH regions and correlate these with the hypsometric profiles based on digital elevation models of these regions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>We discover that the phased evolution of HTH mountain-building and climate oscillations, and species radiations were not exactly synchronous, but were interspersed with periods of inactivity. We find an inverse yet overlapping relationship between elevation-area troughs (EATs) of hypsometric profiles and peaks of endemic plant richness in the HTH, indicating that most endemic species occupy the higher elevational belts with the least geographic areas. These elevational belts comprise geographically and biologically isolated habitats.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Discussion and Conclusions</h3>\u0000 \u0000 <p>We infer that orogeny, monsoon and glaciations have shaped the highly dissected HTH landscapes, characterised by high-relief topography, leading to population isolation, speciation and endemism, <i>albeit</i> with temporal lags. Glacial–interglacial cycles have further promoted isolation, co-habitation, hybridisation and polyploidy among plant populations, generating and accelerating endemic radiations. Our results provide crucial evidence linking mountain-building, climatic events and landform development with plant species richness and endemism in the HTH regions and potentially in other mountain ecosystems.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 7","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309041","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":"Ecosystem Shifts and Cladocera Responses in a Freshwater Lake in Semi-Arid Regions: The Successional Synergistic Effects of Natural and Human Factors in the Past 170 Years","authors":"Longjuan Cheng,&nbsp;Bin Xue,&nbsp;Jinliang Liu,&nbsp;Xiangzhen Kong,&nbsp;Can Zhang,&nbsp;Dejun Wan,&nbsp;Qingfeng Jiang,&nbsp;Dongliang Ning,&nbsp;Wenxiu Zheng","doi":"10.1111/jbi.15149","DOIUrl":"https://doi.org/10.1111/jbi.15149","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;Freshwater lake ecosystems in semi-arid regions are highly fragile and complex. However, the driving forces behind changes in temperate lake ecosystems at a regional scale in China remain largely unclear, primarily due to the lack of multidecadal to centennial regional studies. This study focuses on Hulun Lake, the largest freshwater lake in northern China's semi-arid region, with the aim of elucidating the characteristics and driving mechanisms of freshwater lake ecosystems in such areas.&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;Hulun Lake, the largest freshwater lake in northern China's semi-arid region (48.55° ~ 49.33° N, 116.97° ~ 117.81° E).&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Time Period&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;From the 1840s to 2010s AD.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Major Taxa Studies&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Zooplankton Cladocera.&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;High-resolution multiproxy palaeoecological data (including biological and geochemical indices), human activities parameters and observational datasets from the lake basin are used to explore ecosystem shifts and Cladocera responses in Hulun Lake, located in a semi-arid region, over the past 170 years. The hypothesis that changes in the zooplankton Cladocera community composition within the ecosystem are driven by synergistic interactions among multiple factors was tested using effective approaches based on generalised additive models (GAM) and redundancy analysis (RDA).&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;The results indicate that both internal factors (such as lake sedimentary environment, fish catches, lake water level, organic matter and nutrients) within the lake and external factors (including population, urbanisation rate and livestock husbandry) in the surrounding basin have been key drivers influencing the structure of Cladocera in Hulun Lake over the past 170 years. The originally predominant littoral Cladocera species (&lt;i&gt;Chydorus sphaericus&lt;/i&gt;. sl.) were replaced by planktonic (Bosminidae) since the 1980s accompanied by a decline in diversity, which corresponds with the process of eutrophication and pollution in the lake.&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 dynamics of the Cladocera assemblages indicate that the lake ecosystem is vulnerable to further imbalance since the 2000s due to the ongoing synergistic effects of declining fishery catches, increasing livestock n","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 7","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309122","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":"Determinants of the Southern Range Limit of an Infamous North American Forest Defoliator","authors":"Andrew M. Liebhold,&nbsp;Eugene Luzader,&nbsp;Jacques Régnière","doi":"10.1111/jbi.15151","DOIUrl":"https://doi.org/10.1111/jbi.15151","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Predicting climate driven species range shifts requires knowledge of mechanisms limiting species fitness under various climatic conditions. The traditional approach of modelling ranges of herbivorous insects by fitting environmental niche models to occurrence records is generally incapable of differentiating direct effects of climate on insect populations versus indirect effects acting on the range of their host plants. Here, we delimit the southern extent of a major forest defoliator, the spruce budworm, <i>Choristoneura fumiferana</i>, in North America, and investigate whether its range is limited directly by climate or indirectly by the range of its host trees.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Eastern North America.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We use pheromone traps to survey populations; these are sensitive tools for detecting low-density populations. We applied mechanistic models of the effect of temperature on <i>C. fumiferana</i> fitness to evaluate whether these patterns of occurrence can be explained by the direct effect of climate.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>We found that this insect species is widely present through most of the southern distribution of host spruce and fir species, both in the upper Mississippi River valley and the central and southern Appalachian Mountains. The species was present in ca. 50% of spruce-fir sites surveyed in the Appalachian Mountain region but was absent in the five most southerly sites where spruce and fir occur in eastern North America. Simulation using historical meteorological data indicated that all survey sites are climatically suitable for <i>C. fumiferana</i>.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Simulation of climate effects, along with the species' absence from the most southern distribution of hosts, indicate that while the southern range limit of <i>C. fumiferana</i> is limited by host availability it is not directly constrained by climate. Furthermore, populations at the species' southern extent may be in a dynamic state of extinction and recolonisation, thus explaining at least the temporary absence of <i>C. fumiferana</i> from certain locations.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 7","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.15151","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144309121","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":"Trends in Early Larval Traits of a Global Invader at Home Across a Latitudinal Gradient: The European Shore Crab Carcinus maenas","authors":"Jan Phillipp Geißel,&nbsp;Noé Espinosa-Novo,&nbsp;Luis Giménez,&nbsp;Nicole Aberle,&nbsp;Gro I. van der Meeren,&nbsp;Ralf Rautenberger,&nbsp;Steffen Harzsch,&nbsp;Gabriela Torres","doi":"10.1111/jbi.15143","DOIUrl":"https://doi.org/10.1111/jbi.15143","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;This study sets out to understand the variability in larval traits of dispersive life stages of a famous invader, the European shore crab &lt;i&gt;Carcinus maenas&lt;/i&gt;, in its native distribution range.&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;North East Atlantic coast from the Norwegian Arctic to the southern European distribution limit of &lt;i&gt;C. maenas&lt;/i&gt; in Southern Spain.&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;European shore crab &lt;i&gt;Carcinus maenas&lt;/i&gt; (Crustacea, Decapoda).&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 quantified latitudinal patterns in larval body mass, elemental composition (C and N content), and thermal tolerance of the first larval stage. We collected crabs from four populations spanning 25° of latitude (Vigo in Northern Spain; Bergen, Trondheim, and Bodø in Norway) and reanalysed published and unpublished data of body mass and elemental composition of additional populations from Germany, Wales, France, and Southern Spain. Furthermore, we used two laboratory experiments to test the thermal tolerance limits of the first larval stage from Vigo and the Norwegian populations. In the first experiment, we reared larvae from hatching to Zoea II at seven temperatures (9°C–27°C) and from hatching to LT&lt;sub&gt;50&lt;/sub&gt; at 6°C. In the second experiment, we exposed freshly hatched larvae acutely to increasing or decreasing temperatures (up to 40°C and down to 3°C).&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;Across the entire European range, we found a substantial increase in dry mass and carbon and nitrogen content of freshly hatched larvae with latitude. Norwegian populations exhibited higher survival at 9°C than the Vigo population. Furthermore, LT&lt;sub&gt;50&lt;/sub&gt; at 6°C increased from South to North. All populations showed high survival in the range 12°C–24°C but low survival at 27°C.&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;Larval tolerance quantified by using survival to Zoea II is not clearly related to the tolerance quantified with the acute experiments, indicating that each method assesses different aspects of thermal tolerance. Tolerance to low temperature correlated positively to tolerance to high temperature, suggesting that variation among females in larval responses reflects a general physiological quality rather than trade-offs. We provide evidence for potentially adapti","PeriodicalId":15299,"journal":{"name":"Journal of Biogeography","volume":"52 7","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jbi.15143","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144308687","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}