Diversity and Distributions最新文献

{"title":"Cover page","authors":"","doi":"10.1111/ddi.13887","DOIUrl":"https://doi.org/10.1111/ddi.13887","url":null,"abstract":"<p>The cover image relates to the Research Article https://doi.org/10.1111/ddi.70013 “Migratory Connectivity and Non-Breeding Habitat Segregation Across Biogeographical Scales in Closely Related Seabird Taxa” by Morera-Pujol et al. A Scopoli's shearwater soars just above the surface of the Mediterranean sea off the coast of Palamós, near Barcelona, with a tracking device attached to the leg. Photo credit: Joan Goy.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":51018,"journal":{"name":"Diversity and Distributions","volume":"31 5","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ddi.13887","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892895","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":"Biodiversity Congruence Across Lake-Watershed Landscapes: Insights From an Analysis of 615 Canadian Sites","authors":"Sufyan Mirza,&nbsp;Irene Gregory-Eaves,&nbsp;Yannick Huot","doi":"10.1111/ddi.13953","DOIUrl":"https://doi.org/10.1111/ddi.13953","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>The rapid decline in freshwater biodiversity and growing disturbances in adjacent terrestrial systems (deforestation, wetland destruction, etc.) are threatening the status of watershed ecosystems. This study focuses on both the aquatic and terrestrial realms to provide a general assessment of the health and integrity of biodiversity across 12 ecozones in Canada. The goal is to improve our assessment of geographical trends in Canadian watersheds and to provide support in the decision making for land use planning.</p>\u0000 \u0000 <p>Location.</p>\u0000 \u0000 <p>615 Canadian lake watersheds, spanning across 12 ecozones.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We used species richness and Shannon's biodiversity metrics to quantify and map trends in phytoplankton, zooplankton and trees across Canada. A series of generalised additive models (GAMs), one-way ANOVA, and Tukey HSD tests were conducted to investigate the relationship between aquatic and terrestrial biodiversity and the spatial trend of biodiversity across ecozones. Lastly, a series of multivariate regression tree (MRT) analyses were performed to investigate the relationship between land use, environmental variables and watershed biodiversity.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Total watershed biodiversity followed a longitudinal pattern, where biodiversity estimates were greatest across the eastern ecozones of Canada and lowest in central-western Canada (e.g., Prairies). We found moderately positive relationships between aquatic and tree biodiversity that varied across the different ecozones and were generally strongest across eastern ecozones. Results from the MRTs revealed total watershed biodiversity correlated positively with the proportion of natural landscapes and precipitation and negatively with the proportion of agricultural area.</p>\u0000 \u0000 <p>Main Conclusion.</p>\u0000 \u0000 <p>Our findings provide a better understanding of broad-scale watershed biodiversity trends and distribution, which are strongly influenced by the North American elevation gradient and longitudinal patterns of climatic conditions (e.g., precipitation). We found the proportion of agricultural area to be the variable with the strongest negative correlation with biodiversity. These results provide a first portrait of cross-ecosystem diversity trends in Canada and a key resource for large-scale land use planning and climate change mitigation efforts.</p>\u0000 </section>\u0000 </div>","PeriodicalId":51018,"journal":{"name":"Diversity and Distributions","volume":"31 5","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ddi.13953","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892897","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":"Supporting Reintroduction Planning: A Framework Integrating Habitat Suitability, Connectivity and Individual-Based Modelling. A Case Study With the Eurasian Lynx in the Apennines","authors":"Davide Serva,&nbsp;Miha Krofel,&nbsp;Francesco Cerasoli,&nbsp;Maurizio Biondi,&nbsp;Mattia Iannella","doi":"10.1111/ddi.70024","DOIUrl":"https://doi.org/10.1111/ddi.70024","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Reintroducing carnivores is a widely used approach to restore the natural integrity of ecosystems. Species distribution models (SDMs) and connectivity analyses are valuable tools for planning reintroductions and identifying release sites but are rarely combined. We propose a new framework combining SDMs, connectivity modelling and individual-based models (IBMs) to assess the feasibility of various reintroduction scenarios. As a case study, we applied this framework to plan a potential reintroduction of the Eurasian lynx (<i>Lynx lynx</i>) to the Apennines by: (i) assessing niche overlap between potential source and target populations; (ii) integrating habitat suitability and connectivity to select release sites and (iii) evaluating reintroduction outcomes through IBMs.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Apennines, Peninsular Italy.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We combined niche overlap analysis, ensembles of fine-tuned SDMs and circuit-theory techniques to model connectivity. Then, we integrated suitability and connectivity predictions within a GIS environment to identify the optimal release sites under different scenarios. Finally, we used IBMs to assess population viability, site occupancy and dispersal.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Niche overlap suggested that the Carpathian lynx populations may serve as a valid reintroduction source. Integrating habitat and connectivity models highlighted the most functional sites in the Central (CA) and Northern Apennines (NA). A scenario with individuals released in both CA and NA did not outperform the single-area scenarios. Releasing individuals only in CA showed long-term feasibility but a higher risk of isolation, while release only in NA would not result in viable populations in the long term, despite closer proximity to suitable areas in the Alps.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Our framework can help practitioners with integrating functional connectivity within the selection of release sites for species reintroductions. We recommend incorporating demography, as well as dispersal and settlement phases, when evaluating reintroduction scenarios. This approach identifies critical mortality areas, predicts population size, site occupancy and connectivity and enhances decision-making for successful reintroductions.</p>\u0000 </section>\u0000 </div>","PeriodicalId":51018,"journal":{"name":"Diversity and Distributions","volume":"31 4","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ddi.70024","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875506","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":"Latitudinal Trends in Genetic Diversity and Distinctiveness of Quercus robur Rear Edge Forest Remnants Call for New Conservation Priorities","authors":"Camilla Avanzi,&nbsp;Francesca Bagnoli,&nbsp;Edoardo Romiti,&nbsp;Ilaria Spanu,&nbsp;Yoshiaki Tsuda,&nbsp;Elia Vajana,&nbsp;Giovanni Giuseppe Vendramin,&nbsp;Andrea Piotti","doi":"10.1111/ddi.70018","DOIUrl":"https://doi.org/10.1111/ddi.70018","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Knowledge of the spatial distribution of intraspecific genetic variation is essential for planning conservation actions, designing networks of protected areas, and informing possible assisted migration strategies. Although the Italian peninsula harbours unique genetic variation as a legacy of Quaternary migrations, only sporadic genetic information is available for forest tree species. Here, we present the first geographically comprehensive genetic characterisation of <i>Quercus robur</i>, an iconic broadleaved species of European floodplain forests, in an area which acted as a primary glacial refugium for the species.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Italy.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>745 individuals from 25 populations were sampled and genotyped with 16 nuclear microsatellite markers. Their genetic structure was assessed through various metrics of diversity and distinctiveness, as well as by Bayesian clustering and multivariate methods. The demographic history of inferred gene pools was evaluated through Approximate Bayesian Computation analysis.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Genetic distinctiveness showed a decline with increasing latitude, while allelic richness reached its peak in central Italy. A south-to-north trend in the complexity of the genetic structure was observed, with peninsular Italy being characterised by intermingled gene pools in contrast to the relative homogeneity exhibited by northern populations. Demographic inference indicated that the southern gene pool has been genetically isolated since the penultimate interglacial, whereas populations from central Italy persisted locally in a mosaic of small refugia during the last glaciation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>Our results brought out the complexity of the genetic structure of forest trees' populations in southern Europe. At least three <i>Q. robur</i> refugia contributed to the genetic layout of extant populations after the last glacial period, but refugial areas were probably even more numerous in central Italy. Such a detailed characterisation sheds new light on the priorities to be established for the conservation of highly fragmented <i>Q. robur</i> populations in an area rich in diversified genetic lineages.</p>\u0000 </section>\u0000 </div>","PeriodicalId":51018,"journal":{"name":"Diversity and Distributions","volume":"31 4","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ddi.70018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875505","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":"Multiple Threshold-Selection Methods Are Needed to Binarise Species Distribution Model Predictions","authors":"Marjon Hellegers,&nbsp;Arjen van Hinsberg,&nbsp;Jonathan Lenoir,&nbsp;Jürgen Dengler,&nbsp;Mark A. J. Huijbregts,&nbsp;Aafke M. Schipper","doi":"10.1111/ddi.70019","DOIUrl":"https://doi.org/10.1111/ddi.70019","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Probabilities of occurrence predicted by species distribution models (SDMs) are routinely binarised based on a threshold that maximises the true skill statistic. Recently, the true skill statistic is criticised for favouring overprediction when species' prevalence is low. We aim to assess the effect of three alternative threshold-selection methods on predicted range sizes and changes therein under climate change across a large number of species in Europe.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Europe.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We fitted SDMs for 1677 vascular plant species, using species observations from 431,179 vegetation plots as response variables and climate, soil and topographic variables as predictors. We used the SDMs to quantify current and future range sizes of each species under mild and severe climate change scenarios, each combined with two dispersal assumptions (no and unlimited dispersal) and using four threshold-selection methods: maximising true skill statistic (TSS), minimising the difference between sensitivity and specificity (DSS), maximising Matthew's correlation coefficient (MCC) and maximising F-measure (F). Further, we assessed prediction errors for each threshold-selection method in relation to species prevalence.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>We found that SDM outputs binarised with TSS resulted in the largest predicted ranges and the smallest future range contractions. For current climate conditions, median range sizes were 1.3, 3.6 and 9.2 times larger when binarised with TSS than with DSS, MCC and F, respectively. Under severe climate change without dispersal, median range size declines were 56%, 61%, 79% and 88% with TSS, DSS, MCC and F, respectively. Binarisation based on TSS tended to result in the highest overprediction rates and lowest underprediction rates, while this was the opposite with F.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>We recommend choosing the threshold-selection method based on the goals and scope of the study, while carefully considering the trade-offs between overprediction and underprediction. Alternatively, we recommend using multiple threshold-selection methods to quantify the uncertainty in the binarisation.</p>\u0000 </section>\u0000 </div>","PeriodicalId":51018,"journal":{"name":"Diversity and Distributions","volume":"31 4","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ddi.70019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856843","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":"Continental-Scale Assessment of Climate-Driven Marine Species Range Extensions Using a Decade of Citizen Science Data","authors":"Barrett W. Wolfe,&nbsp;Curtis Champion,&nbsp;Troy Gaston,&nbsp;Joshua Brown,&nbsp;Melinda A. Coleman,&nbsp;Tom R. Davis,&nbsp;Sven Frijlink,&nbsp;Thomas Hatley,&nbsp;Freddie J. Heather,&nbsp;Gary Jackson,&nbsp;John P. Keane,&nbsp;Shannon Kjeldsen,&nbsp;Mark McGrouther,&nbsp;Natalie Moltschaniwskyj,&nbsp;Glenn Moore,&nbsp;Rod Pearn,&nbsp;Kate R. Rodda,&nbsp;Jan Strugnell,&nbsp;Jemina Stuart-Smith,&nbsp;John W. Turnbull,&nbsp;Sue-Ann Watson,&nbsp;Gretta T. Pecl","doi":"10.1111/ddi.70022","DOIUrl":"https://doi.org/10.1111/ddi.70022","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>Climate-driven extensions of species distributions have serious consequences for human wellbeing and ecosystems. The recent growth of citizen science data collection represents an underutilised resource for the early detection of marine species range extensions (i.e., expansion of species' distributions at the poleward edge) that can enable proactive conservation and management. Here, we present a framework for the systematic assessment of evidence for marine species range extensions along a continent's coastlines from observations collected by different citizen science programmes.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Australia's coastal oceans.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Observations of 200 marine species on a pre-registered target list from around Australia during 2013–2022 were sourced from the citizen science databases Redmap Australia, iNaturalist, and Reef Life Survey. We established historical (circa 2012) poleward distribution limits for populations of target species and identified out-of-range (poleward of distribution limit) observations, which underwent expert validation. We assessed the likelihood that each species underwent range extension using a decision tree informed by citizen science observations and species traits.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>In total, 73 species (39%) were observed out-of-range, comprising 76 range extensions along different coastlines. Twenty-five range extensions were assessed as high confidence, five with medium confidence, and 46 with low confidence. Range extensions were concentrated in Australia's southwest (Western Australia) and southeast (New South Wales and Tasmania), which are influenced by warm boundary currents and considered ocean warming hotspots. The mean extent of range extensions was 318 km (max. 1250 km).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>As most (91%) range extensions identified were not previously described in the scientific literature from other data, we demonstrate that opportunistic citizen science monitoring can provide early detection of marine species range extensions at the continental scale. Given the varied consequences of range-extending species for recipient ecosystems, effectively harnessing citizen science would critically enhance the capacity for needed targeted research and anticipatory management efforts.</p>\u0000 </section>\u0000 </div>","PeriodicalId":51018,"journal":{"name":"Diversity and Distributions","volume":"31 4","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ddi.70022","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143801428","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":"When Birding Hotspots Get Too Hot: A Geographic Evaluation of Wildfire-Related Disturbance on Spatiotemporal Biases in Citizen Science Data","authors":"Edwin A. Jacobo,&nbsp;Jeffrey A. Manning","doi":"10.1111/ddi.70021","DOIUrl":"https://doi.org/10.1111/ddi.70021","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 is critical for ecology and conservation, especially as non-stationary climatic conditions increase. Citizen science projects offer long-term georeferenced data from thousands of observers across diverse geographic areas. Despite the attraction of these datasets for biogeographical research and conservation planning, data collection commonly lacks standardised probabilistic sampling, which can increase observer bias, decrease precision of parameter estimates, and increase risk of spurious results when using the associated species data. Additionally, environmental disturbance may affect observer behaviour, confounding observed patterns in species responses. We aimed to test the effects of wildfire disturbance on observer biases in locality selection and return rates by citizen scientists registered with eBird, a globally available bird observation database.&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;Western USA.&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 used a long-term (10-year) dataset of 47,662 localities from 1788 eBird observers to calculate resource selection functions and explain observer locality selection as a function of wildfire and non-fire-related environmental covariates. We calculated spatiotemporally explicit covariates from the Monitoring Trends in Burn Severity program and also developed generalised linear mixed models to predict the probability of observers returning to localities in response to fire and non-fire variables.&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;Our results show that fire characteristics predicted locality selection and the probability of returning to a locality. Closer, more recent, larger and more severe fires showed the greatest effects on spatiotemporal patterns of observer sampling bias. Other non-fire-related variables related to locality attractiveness, land use, convenience and accessibility were also important.&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 results demonstrate that landscape disturbance introduces spatiotemporal biases in citizen scientist locality selection and revisitation. Researchers using citizen science data can follow our modelling approach to quantify disturbance-related observer sampling biases and estimate bias-corrected parameters necessary for ecological studies. Without this, observer biases inherent in these data can lead to increased bias, decreased precision in parameter estimates and spuri","PeriodicalId":51018,"journal":{"name":"Diversity and Distributions","volume":"31 4","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ddi.70021","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143762101","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 and Genetic Status of the Enigmatic Pig-Nosed Turtle (Carettochelys insculpta) Within the Australo-Papuan Region","authors":"Matthew J. Young,&nbsp;Peter J. Unmack,&nbsp;Bernd Gruber,&nbsp;Dianne M. Gleeson,&nbsp;Carla C. Eisemberg,&nbsp;Yolarnie Amepou,&nbsp;Dotty Ibana,&nbsp;Arthur Georges","doi":"10.1111/ddi.70015","DOIUrl":"https://doi.org/10.1111/ddi.70015","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>We examine the phylogeographic genetic structure of the endangered pig-nosed turtle <i>Carettochelys insculpta</i>, the last remaining member of a once globally widespread family, now restricted to northern Australia and southern New Guinea, a region with a complex geological and eustatic history. We examine their historical biogeography, demographic history and genetic status of threatened populations.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Location</h3>\u0000 \u0000 <p>Northern Australia, Southern New Guinea.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>We reconstruct phylogenetic relationships and patterns of genetic diversity using a genome-wide dataset of 15,081 single nucleotide polymorphisms and two mitochondrial loci from samples spanning the full species' range.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The Australian, Papua New Guinea and Indonesian Papua turtles are recovered as three distinct lineages; the Australian lineage diverged from the New Guinea lineages <i>ca</i> 660 Kya, while the Papua New Guinea and Indonesian Papua Province lineages diverged <i>ca</i> 564 Kya. Although the fossil record shows that <i>C. insculpta</i> has been a long-standing representative of the Australia and New Guinea fauna (since at least the Miocene), extant lineages diverged later in the Middle Pleistocene. Both the Australian and Papua New Guinea lineages were likely shaped by bottlenecks, isolation and genetic drift, which in the Australian lineage greatly reduced effective population sizes to 48–88.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Main Conclusions</h3>\u0000 \u0000 <p>The contemporary genetic structure of <i>C. insculpta</i> is most consistent with a vicariance model whereby a large interchanging population occupying northern Australia and New Guinea came to be fragmented and diverged into Australian, Papua New Guinea and Indonesian Papua lineages. Subsequent dispersal via paleodrainages of the submerged continental shelf under the influence of Pleistocene sea-level change is thought to have been impeded by the isolation of the Akimeugah and Arafura Basins. All populations of the Australian lineage show low genetic diversity without contemporary gene flow, suggesting they are vulnerable to inbreeding and reduced fitness, requiring the consideration of genetic rescue.</p>\u0000 </section>\u0000 </div>","PeriodicalId":51018,"journal":{"name":"Diversity and Distributions","volume":"31 4","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ddi.70015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726885","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":"Cover page","authors":"","doi":"10.1111/ddi.13885","DOIUrl":"https://doi.org/10.1111/ddi.13885","url":null,"abstract":"<p>The cover image relates to the Research Article https://doi.org/10.1111/ddi.70013 “Migratory Connectivity and Non-Breeding Habitat Segregation Across Biogeographical Scales in Closely Related Seabird Taxa” by Morera-Pujol et al. A Scopoli's shearwater soars just above the surface of the Mediterranean sea off the coast of Palamós, near Barcelona, with a tracking device attached to the leg. Photo credit: Joan Goy.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":51018,"journal":{"name":"Diversity and Distributions","volume":"31 4","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ddi.13885","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726886","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":"Biogeographic Implications of Biodiversity Shortfalls in a Mid-Altitude Desert Ecotone of the Arabian Peninsula","authors":"André Vicente Liz,&nbsp;Fulvio Licata,&nbsp;Bárbara Santos,&nbsp;Duarte Vasconcelos Gonçalves,&nbsp;Margareta Lakušić,&nbsp;Myrto Roumelioti,&nbsp;Nina Serén,&nbsp;Pedro Tarroso,&nbsp;Ayman Abdulkareem,&nbsp;Patkó László,&nbsp;José Carlos Brito","doi":"10.1111/ddi.70016","DOIUrl":"https://doi.org/10.1111/ddi.70016","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;Macroscale biodiversity inferences are critical for spatial conservation planning, yet they are affected by the limitations of global datasets and the paucity of genetic data. In this study, we conducted a comprehensive sampling campaign and explored how biodiversity shortfalls impact spatial diversity metrics across a mid-altitude desert ecotone, where mega conservation and restoration projects are underway.&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;AlUla region (NW Arabian Peninsula).&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Taxa&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;Terrestrial 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 generated a DNA barcode library including 580 field-collected samples to investigate species distributions, candidate species and intraspecific diversity. Species distributions were mapped using climatic envelopes, while candidate species and intraspecific diversity were assessed with phylogenetic methods. Patterns of α and β diversity were mapped based on IUCN and GARD expert maps (expected diversity) and on an integrative assessment combining field and bibliographic occurrences (observed diversity). Topographic drivers of nucleotide diversity were tested using Generalised Linear Mixed Models.&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;Over one-third of the verified species in the region (&lt;i&gt;n&lt;/i&gt; = 58) experienced Linnean, Wallacean or Darwinian shortfalls, including 6 candidate species, 11 new to the region and 7 harbouring significant intraspecific diversity. Additionally, 13 species predicted by expert maps were absent. Both IUCN and GARD projections showed significant mismatches with observed α and β diversity, though GARD provided α-diversity estimates closer to observed patterns. Nucleotide diversity increased with absolute altitude.&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;Field and genetic-based data significantly enhance biodiversity knowledge and conservation tools for this rapidly developing desert region. By addressing the critical limitations of macroscale approaches in undersampled yet diverse landscapes, we demonstrate how global databases often overlook local community turnovers, misleading diversity estimates. Thereby, we highlight the need for fine-scale integrative research to inform conservation strategies and the power of DNA barcoding for inter- and intraspecific biodiversity ","PeriodicalId":51018,"journal":{"name":"Diversity and Distributions","volume":"31 3","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ddi.70016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698806","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}