Journal of Biogeography最新文献_第8页

Landscape-Mediated Effects of Climate Change on Metacommunities Inhabiting Mediterranean Seagrass 景观介导的气候变化对地中海海草元群落的影响

IF 3.6 2区环境科学与生态学 Q2 ECOLOGY

Journal of Biogeography

Pub Date : 2025-11-28 DOI: 10.1111/jbi.70105

Damiano Baldan, David Cunillera-Montcusí, Marco Reale, Stefano Piani, Fabrizio Gianni, Serena Zunino, Gianpiero Cossarini, Stefano Salon, Cosimo Solidoro, Vinko Bandelj

Aim

Climate change affects dramatically biogenic habitats by altering the geographic distribution of the foundational species and the structure of landscapes they form. As a consequence, the associated biotic communities could experience habitat loss and fragmentation. In this paper, we assess how climate change impacts the geographic distribution of Mediterranean seagrass habitats and the cascading effects on the biodiversity of metacommunities they support.

Location

Mediterranean Sea.

Taxon

Posidonia oceanica and Cymodocea nodosa.

Methods

We employ state-of-the-art physical and biogeochemical data for the Mediterranean Sea to model the seagrass distribution in the present climate using Species Distribution Models (SDMs). Based on the identified habitat configuration, we employ a neutral metacommunity model (NMM) to simulate virtual metacommunities structured by stochastic demographic processes and dispersal.

Results

SDMs were fitted with acceptable performances. We show a strong range contraction for both seagrass species (with uncertain predictions for the Southern and Eastern Mediterranean), a decrease in alpha diversity of associated communities, and an increase in beta diversity at the Mediterranean scale. Such changes are solely the result of the rearrangement of the landscape caused by climate change and create an offset for any distributional change related to niche effects. For different basins, we show that patterns of alpha diversity under realistic species dispersal are strongly correlated with habitat availability, while beta diversity is largely influenced by the changes in the spatial configuration of seagrass habitats.

Main Conclusions

By highlighting hotspots of metacommunity change linked to habitat fragmentation, our method can be useful for planning conservation and restoration measures at local and regional scales. We show that, besides niche effects, climate change can impact species distribution by altering the landscape structure.

目的气候变化通过改变基础物种的地理分布及其形成的景观结构，对生物栖息地产生巨大影响。因此，相关的生物群落可能会经历栖息地的丧失和破碎化。本文评估了气候变化对地中海海草生境地理分布的影响及其对其所支持的元群落生物多样性的级联效应。地理位置：地中海。海洋波西多亚分类群和多瘤海丝多亚分类群。方法利用地中海最先进的物理和生物地球化学数据，利用物种分布模型（SDMs）模拟当前气候条件下海草的分布。在确定生境配置的基础上，采用中性元群落模型（NMM）模拟了由随机人口统计过程和分散构成的虚拟元群落。结果SDMs具有良好的拟合性能。我们发现，在地中海尺度上，两种海草物种的范围都出现了强烈的收缩（对地中海南部和东部的预测不确定），相关群落的α多样性减少，而β多样性增加。这种变化完全是气候变化引起的景观重新排列的结果，并抵消了与生态位效应有关的任何分布变化。在不同流域，物种实际扩散下的α多样性格局与生境可得性密切相关，而β多样性则主要受海草生境空间构型变化的影响。该方法通过突出与生境破碎化相关的元群落变化热点，可为区域和地方尺度的保护和恢复措施规划提供参考。研究表明，除了生态位效应，气候变化还可以通过改变景观结构来影响物种分布。

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引用次数: 0

Life-History Strategies Drive Plant Species Richness Patterns in the Atlantic Forest Hotspot 生活史策略驱动大西洋森林热点地区植物物种丰富度格局

IF 3.6 2区环境科学与生态学 Q2 ECOLOGY

Journal of Biogeography

Pub Date : 2025-11-28 DOI: 10.1111/jbi.70103

Weverton Carlos Ferreira Trindade, Victor Zwiener, A. Townsend Peterson, Márcia C. M. Marques

Aim

The underlying processes driving the origin and spatial variation of species richness stand as one of the most fundamental and enigmatic questions in ecology. Here, we assess the roles of water stress, energy availability, climatic seasonality, physiological tolerance to cold extremes, historical climate stability, and topographic heterogeneity in shaping spatial richness variation among various plants of the Atlantic Forest.

Location

Atlantic Forest Hotspot, South America.

Taxon

14,042 species of vascular plants (angiosperms and gymnosperms), including trees, lianas, shrubs, subshrubs, terrestrial herbs, and epiphytic herbs.

Methods

We employed stacked ecological niche modelling to estimate species richness across different plant life forms. We then applied spatial models and hierarchical partitioning to assess the role and significance of each hypothesis in explaining species diversity variation.

Results

Spatial richness variation in the Atlantic Forest results from the interplay of multiple drivers, with effects differing among plant life forms. Overall, regions with higher energy availability, lower temperature seasonality, higher temperature stability but lower precipitation stability over the last 21,000 years, and more complex topography harboured more species. However, the effects of water stress and cold sensitivity contrast among life forms.

Main Conclusions

Observed species richness variation among life forms is primarily rooted in their life-history strategies. Trees and lianas exhibited lower sensitivity to water stress but were less tolerant of cold extremes, whereas subshrubs and terrestrial herbs showed the opposite pattern, with lower tolerance to water stress but greater cold tolerance. Shrubs and epiphytic herbs displayed an intermediate pattern, combining the reduced sensitivity to water stress of trees and lianas with the higher cold tolerance of subshrubs and terrestrial herbs. Our study deepens the understanding of the factors shaping Atlantic Forest diversity and opens new pathways for predicting and managing large-scale impacts of human activities.

目的物种丰富度起源和空间变化的驱动过程是生态学中最基本和最神秘的问题之一。在此，我们评估了水分胁迫、能量可用性、气候季节性、对极端寒冷的生理耐受性、历史气候稳定性和地形异质性在大西洋森林各种植物空间丰富度变化中的作用。地点大西洋森林热点，南美洲。维管植物（被子植物和裸子植物）14,042种，包括乔木、藤本植物、灌木、亚灌木、陆生草本和附生草本。方法采用堆叠生态位模型估算不同植物生命形式的物种丰富度。然后，我们应用空间模型和层次划分来评估每种假设在解释物种多样性变化中的作用和意义。结果大西洋森林空间丰富度变化是多种驱动因素共同作用的结果，不同植物的影响程度不同。总体而言，在过去2.1万年中，能量可用性较高、温度季节性较低、温度稳定性较高但降水稳定性较低、地形更复杂的地区拥有更多的物种。然而，水胁迫和冷敏感性的影响在不同的生命形式之间存在差异。主要结论不同生命形式间物种丰富度的差异主要源于它们的生活史策略。乔木和藤本植物对水分胁迫的敏感性较低，对极端寒冷的耐受性较差，而亚灌木和陆生草本植物则相反，对水分胁迫的耐受性较低，但对极端寒冷的耐受性较强。灌木和附生草本植物对水分胁迫的敏感性较低，而亚灌木和陆生草本植物的耐寒性较高。我们的研究加深了对大西洋森林多样性形成因素的理解，为预测和管理人类活动的大规模影响开辟了新的途径。

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引用次数: 0

Eroding Cycles Along a Southern Range Boundary: Snowshoe Hares in the Great Lakes Region 沿着南部山脉边界的侵蚀循环：五大湖地区的雪鞋兔

IF 3.6 2区环境科学与生态学 Q2 ECOLOGY

Journal of Biogeography

Pub Date : 2025-11-25 DOI: 10.1111/jbi.70091

Rebecca S. Chandross, Jonathan N. Pauli

Aim

The regular cycling of animal populations has fascinated ecologists for over a century. Some cycling populations have recently however, exhibited instability, often attributed to climate change. Snowshoe hare (Lepus americanus) cycles are well documented, displaying peaks every 8–11 years. While these cycles have been studied extensively in the core of their distributional range, less is known about snowshoe hare cyclic dynamics along their southern range boundary. We tested the hypotheses that the cycling of southern snowshoe hare populations varies across a latitudinal cline and that populations have exhibited dampening in recent years.

Location

Six latitudinal degrees (44°–49° N) in the Great Lakes region.

Taxon

Snowshoe hare (Lepus americanus).

Methods

Utilising a series of snow track transects across Minnesota and Wisconsin, we examined snowshoe hare cyclicity across a 40-year time series from 1978 to 2022. These transects were grouped into four bands across the Great Lakes region to identify changes across a latitudinal cline. Wavelet analysis was then used to examine shifts in cyclic behaviour across time.

Results

We found evidence of cyclicity across all latitudinal zones and detected a gradient of fading cyclicity along their southern range boundary.

Main Conclusions

Our findings reveal that while snowshoe hare populations along their southern range boundary have previously cycled, in recent years they appear to be destabilising. These observed shifts in cyclic behaviour may be linked to other regional shifts including range contraction and climate change; however, further research investigating the causal mechanisms behind this cyclic loss is needed.

一个多世纪以来，动物种群的周期性变化一直吸引着生态学家。然而，一些骑自行车的人群最近表现出不稳定，这通常归因于气候变化。雪鞋兔（Lepus americanus）周期有很好的记录，每8-11年出现一次高峰。虽然这些旋回在其分布范围的核心已被广泛研究，但对其南部范围边界的雪鞋旋回动力学知之甚少。我们测试了南方雪鞋兔种群的循环在纬度上的变化，以及近年来种群表现出衰减的假设。地理位置：五大湖地区北纬6度（北纬44°-49°）。美洲雪蹄兔分类群。方法利用明尼苏达州和威斯康星州的一系列雪道横断面，研究了1978年至2022年40年时间序列中的雪鞋周期。这些样带在五大湖地区被分成四个带，以确定跨纬度的变化。然后使用小波分析来检查循环行为随时间的变化。结果在所有纬向带都发现了旋回性的证据，并在其南部山脉边界发现了旋回性逐渐减弱的梯度。我们的研究结果表明，虽然雪靴兔种群在其南部范围边界之前已经循环，但近年来它们似乎不稳定。这些观测到的周期变化可能与其他区域变化有关，包括范围收缩和气候变化；然而，需要进一步研究这种循环损失背后的因果机制。

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引用次数: 0

True Locals: Taxonomic, Phylogenetic and Functional Diversity Level Off at Short Distances in Groundwater Amphipods in the Western Balkans 真正的本地动物：西巴尔干地区地下水片脚类动物的分类学、系统发育和功能多样性在短距离内趋于稳定

IF 3.6 2区环境科学与生态学 Q2 ECOLOGY

Journal of Biogeography

Pub Date : 2025-11-21 DOI: 10.1111/jbi.70100

Ester Premate, Roman Alther, Maja Zagmajster, Florian Altermatt, Cene Fišer

Aim

Multi-faceted and multi-scale biodiversity assessments and disentangling the factors driving the biodiversity patterns are fundamental for effective protection of biodiversity and prediction of future community changes. Despite its importance, groundwater is still a data-deficient and under-studied ecosystem. Here, to fill the knowledge gap, we quantify multiple facets of beta diversity (βD) and identify their drivers on a regional level in a groundwater biodiversity hotspot.

Location

Western Balkans, Europe.

Taxon

Subterranean amphipods of the family Niphargidae.

Methods

We compiled three datasets: distribution, phylogeny, and functional traits of Niphargidae and assessed taxonomic (TβD), phylogenetic (PβD) and functional beta diversity (FβD) at different spatial scales. We evaluated the spatial variability between these different facets and identified the drivers of βD patterns using generalised dissimilarity models (GDMs). Lastly, we constructed null models to test whether geographic distance nonrandomly explains βD in observed groundwater communities.

Results

We found a high βD with a dominant replacement component in all three facets, but their spatial patterns were incongruent. GDMs revealed that geographic distance between communities was by far the most significant predictor of βD in all three facets. Additionally, karst share and maximum temperature were important predictors of TβD and PβD. Both the results of GDMs and null models showed that the decay in community similarity mostly happens at relatively local scales (< 100 km distance) in all three facets.

Main Conclusions

Our results show that βD patterns in groundwater are primarily influenced by geographic distance between communities and are possibly an outcome of dispersal constraints, while the role of ecological factors remains elusive. As there is a high replacement at even relatively local scales (up to 100 km), a strategy for effective groundwater biodiversity protection in the region would require multiple smaller protected areas rather than a few large ones.

目的开展多角度、多尺度的生物多样性评价，揭示生物多样性格局的驱动因素，是有效保护生物多样性和预测未来群落变化的基础。尽管地下水很重要，但它仍然是一个数据不足、研究不足的生态系统。在此，为了填补知识空白，我们量化了地下水生物多样性（βD）的多个方面，并在区域层面上确定了它们的驱动因素。地理位置：西巴尔干，欧洲。泥足科的地下片足类。方法收集Niphargidae的分布、系统发育和功能性状3个数据集，对不同空间尺度上Niphargidae的分类（TβD）、系统发育（PβD）和功能β多样性（FβD）进行评价。我们评估了这些不同方面之间的空间变异性，并使用广义不相似性模型（GDMs）确定了βD模式的驱动因素。最后，我们构建了零模型来检验地理距离是否非随机解释了观测到的地下水群落的βD。结果βD值高，在三个面均以替代成分为主，但空间分布不一致。gdm显示，群落间的地理距离是目前为止三个方面βD最显著的预测因子。岩溶份额和最高温度是t - β d和p - β d的重要预测因子。gdm模型和零模型的结果均表明，群落相似性的衰减主要发生在相对局域尺度（100 km距离）。研究结果表明，地下水βD格局主要受群落间地理距离的影响，可能是分散约束的结果，而生态因子的作用尚不明确。由于即使在相对局部的尺度上（高达100公里）也有很高的替代率，因此该地区有效的地下水生物多样性保护战略将需要多个较小的保护区，而不是几个较大的保护区。

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引用次数: 0

Different Dispersal Rates and Declining Climate Suitability Shape Future Vegetation Compositions Across the Arctic 不同的扩散速率和不断下降的气候适宜性塑造了北极地区未来的植被组成

IF 3.6 2区环境科学与生态学 Q2 ECOLOGY

Journal of Biogeography

Pub Date : 2025-11-20 DOI: 10.1111/jbi.70079

Ronja Schwenkler, Ulrike Herzschuh, Luca Zsofia Farkas, Boris Schröder, Simeon Lisovski

<div> <section> <h3> Aim</h3> <p>We investigate how species-specific dispersal abilities might influence future Arctic plant distributions and large-scale dynamics at the boreal forest–tundra boundary until 2100.</p> </section> <section> <h3> Location</h3> <p>Circumpolar terrestrial Arctic (boreal forest, taiga and tundra).</p> </section> <section> <h3> Taxon</h3> <p>1550 plant species.</p> </section> <section> <h3> Methods</h3> <p>We developed climate-driven species distribution models (SDM) to predict species-specific emerging climate niches under different climate scenarios. The model was parameterized using occurrence data from the Global Biodiversity Information Facility database (GBIF) and temperature and bioclimatic variables from the CHELSA data set. Dispersal rates were assigned to each species using a trait-based approach and were used to predict future habitat with a distance-based probability over time.</p> </section> <section> <h3> Results</h3> <p>Plant species are predicted to occupy on average only 12.3% (1.5–53.9 95% CI) of their emerging climate niches, with half of the species unable to colonise new habitat by 2100 due to limited dispersal distances. In dispersal-limited predictions, migration to higher altitudes played a greater role than northward shifts. Decolonisation by species (extirpation) due to decreasing climate suitability had a larger effect on species composition change compared to dispersal limitations. Boreal tree species were predicted to expand into the tundra, shrinking the treeless areas.</p> </section> <section> <h3> Main Conclusions</h3> <p>Future plant species distributions and resulting large-scale compositions are affected by species-specific dispersal rates. Even though new suitable niches emerge prominently towards the north, higher altitudes might be more relevant given their accessibility by dispersal over the next century. Although climate niche dynamics could support higher plant species richness across the Arctic, overall richness is expected to decline with climate warming due to dispersal limitations. The colonisation of new habitats via dispersal in combination with the decolonisation of former habitats due to declining climatic suitability on a species level is predicted to cause large-scale changes in species composition, especially at the boundary between the boreal forest and the tundra biome.

目的研究物种特异性扩散能力如何影响到2100年前北极森林-苔原边界的未来植物分布和大尺度动态。地理位置环极地陆地北极（北方森林，针叶林和苔原）。植物种类1550分类群。方法建立气候驱动的物种分布模型（SDM），预测不同气候情景下物种特有的新兴气候生态位。利用全球生物多样性信息设施数据库（GBIF）的发生率数据和CHELSA数据集的温度和生物气候变量对模型进行参数化。使用基于特征的方法分配每个物种的扩散率，并使用基于距离的概率随时间预测未来栖息地。结果预测植物物种平均仅占其新兴气候生态位的12.3% (1.5 - 53.9% 95% CI)，其中一半的物种由于有限的传播距离而无法在2100年之前定居新的栖息地。在分散有限的预测中，向高海拔地区的迁移比向北的迁移发挥了更大的作用。与扩散限制相比，气候适宜性降低导致的物种非定殖（灭绝）对物种组成变化的影响更大。北方树种预计将扩展到冻土带，缩小无树地区。主要结论未来植物物种分布及其大尺度组成受物种特异性扩散速率的影响。尽管新的适宜的生态位在北方显著出现，但考虑到它们在下个世纪的分散，更高的海拔可能更有意义。尽管气候生态位动态可以支持整个北极地区更高的植物物种丰富度，但由于扩散限制，总体丰富度预计会随着气候变暖而下降。据预测，由于物种水平上气候适宜性的下降，新栖息地的扩散和原栖息地的非殖民化将导致物种组成的大规模变化，特别是在北方森林和苔原生物群落之间的边界。

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引用次数: 0

Geography and Site-Specific Factors, Rather Than Recent Climate, Dominated Spanish Wintering Bird Communities 地理和特定地点因素，而不是最近的气候，主导了西班牙越冬鸟类群落

IF 3.6 2区环境科学与生态学 Q2 ECOLOGY

Journal of Biogeography

Pub Date : 2025-11-18 DOI: 10.1111/jbi.70097

Pau Lucio-Puig, Virginia Garófano-Gómez, Sergio Morell-Monzó, Juan S. Monrós, Alejandro Onrubia, Francisco A. García-Castellanos, Diana Ferrís, Mariano Paracuellos, Rafael Muñoz-Mas

<div> <section> <h3> Aim</h3> <p>To assess the extent to which climatic, environmental, geographic and sampling-related variables shaped species composition and the components of β-diversity (turnover and nestedness) in wintering bird communities during the last 25 years across the eastern Iberian Peninsula.</p> </section> <section> <h3> Location</h3> <p>Eastern Iberian Peninsula, across 78 sites in Spain.</p> </section> <section> <h3> Taxon</h3> <p>Ninety seven thousand one hundred and ninety-seven birds ringed and recorded from December to February between 1997 and 2022.</p> </section> <section> <h3> Methods</h3> <p>We used Mixed Graphical Models (Graphical Lasso) to study the covariation between environmental and geographic variables and taxonomy-based components of β-diversity (turnover and nestedness), accounting for differences in the sampling efforts. Additionally, we analysed the associations between individual species abundances, overall species richness and the environmental variables. The resulting species groupings were further tested for trait-based patterns. Finally, we assessed spatiotemporal trends in bird abundance, presence–absence data and climatic variables to evaluate potential long-term changes.</p> </section> <section> <h3> Results</h3> <p>Our results indicate that spatial turnover was the dominant process shaping β-diversity across study sites. The Mixed Graphical Models revealed that dissimilarity in elevation, habitat and sampling effort primarily drove turnover and nestedness, and that the assemblages remained largely stable during the 25-year study period. Overall, species presence was associated with site-specific factors, while species richness was incidentally correlated positively with eight forest bird species. Only six species exhibited significant trends driven solely by temporal effects, whereas most species were driven by longitude alone or combined spatiotemporal factors, suggesting strong site-specific responses and no consistent general pattern in the region. Although not statistically significant, maximum temperature variables exhibited a positive temporal trend, suggesting gradual warming on the condition preceding each survey during the study period.</p> </section> <section> <h3> Main Conclusions</h3> <p>The stability in wintering bird assemblages in the Iberian Peninsula may be attributed to its geographical position in temperate zones, which could reduce the sensitivity of bird assemblages to climatic variability at intermediat

目的评估过去25年来伊比利亚半岛东部越冬鸟类群落中气候、环境、地理和采样相关变量对物种组成和β-多样性（周转和筑巢）组成的影响程度。地点东伊比利亚半岛，横跨西班牙的78个地点。1997年至2022年的12月至2月期间，971797只鸟类被圈养和记录。方法采用混合图形模型（graphic Lasso）研究环境和地理变量之间的协变，以及基于分类的β-多样性成分（周转和巢性），说明采样努力的差异。此外，我们还分析了个体物种丰富度、整体物种丰富度与环境变量之间的关系。得到的物种分组进一步测试了基于性状的模式。最后，我们评估了鸟类丰度、有无数据和气候变量的时空趋势，以评估潜在的长期变化。结果空间转换是影响各研究点β多样性的主要过程。混合图形模型表明，海拔、生境和采样努力的差异是导致更替和筑巢的主要因素，并且在25年的研究期间，这些组合基本保持稳定。总体而言，物种存在度与立地特异因子相关，而物种丰富度与8种森林鸟类偶然正相关。仅6种植物表现出明显的时间驱动趋势，而大多数物种表现出经度单独或综合时空因素的驱动趋势，表明该地区具有强烈的站点特异性响应，而没有一致的总体模式。虽然统计上不显著，但最高温度变量表现出正的时间趋势，表明在研究期间，每次调查前的条件逐渐变暖。结论伊比利亚半岛越冬鸟类群落的稳定性可能与其温带地理位置有关，这可能降低了鸟类群落对中纬度气候变化的敏感性。这与北部和热带纬度地区报告的模式形成对比。此外，这种相对的恢复力也可能反映了广泛的多面手物种的优势，它们倾向于忍受环境波动，并可以掩盖气候引起的群落变化的早期信号。这些结果强调了根据空间变异性和当地特定条件制定保护策略的必要性，特别强调保持栖息地多样性和保护具有代表性的海拔和气候梯度的地区。

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引用次数: 0

Neotropical Rivers as Potential Interaction Corridors: An Evaluation of Frugivory Metanetworks Across Two Biogeographic Domains in South America 新热带河流作为潜在的相互作用走廊：对南美洲两个生物地理域的Frugivory元网络的评价

IF 3.6 2区环境科学与生态学 Q2 ECOLOGY

Journal of Biogeography

Pub Date : 2025-11-17 DOI: 10.1111/jbi.70094

Ignacio José Berón, Carine Emer, José Francisco Pensiero, Alejandro Raúl Giraudo

<div> <section> <h3> Aim</h3> <p>Frugivory interactions vary widely, yet their connectivity and spatial structuring at regional scales remain poorly understood. Using a metanetwork approach, we aim to test whether large rivers and their associated riparian habitats function as “interaction corridors” by linking otherwise segregated local networks. We studied avian frugivory in two contiguous Neotropical domains: the xerophytic Chaco and the humid Paraná, the latter embedded within a riverine corridor shaped by South America's second largest lowland river system.</p> </section> <section> <h3> Location</h3> <p>Santa Fe Province, Argentina.</p> </section> <section> <h3> Taxon</h3> <p>Avian frugivores and fleshy fruiting plants.</p> </section> <section> <h3> Methods</h3> <p>We recorded avian frugivory interactions across six forest sites spanning two neotropical Biogeographic domains. Then, we constructed aggregated and domain-specific metanetworks to test whether sites are functionally connected through ecological interactions facilitated by riverine connectivity. We quantified (i) measures of connectance, nestedness, and modularity, (ii) interactions centrality and their correlated functional traits, and (iii) assessed beta diversity of species and interactions, which allowed us to evaluate patterns of turnover and nestedness across spatial and biogeographic gradients.</p> </section> <section> <h3> Results</h3> <p>The aggregated metanetwork revealed a connected core (Paraná) and a peripheral region (Chaco), characterised by high turnover of plants and interactions, moderate bird turnover and high plant nestedness. The chaco network exhibited higher modularity, lower connectance and nestedness, and greater beta diversity. In contrast, the Paraná network showed higher connectance and lower beta diversity, nestedness and modularity. Consistently, most interactions were peripheral and site-specific, with only a small subset of interactions connecting sites. Trait analyses revealed differences in Interaction roles in Paraná but not in Chaco.</p> </section> <section> <h3> Main Conclusions</h3> <p>Our findings highlight the potential role of large rivers, and their associated riparian habitats, as functional corridors of species dispersal and interaction flows, influencing the spatial structuring of frugivory metacommunities at large scales. This has important implications for biodiversity conservation and the maintenance of ecosystem processes in Neotropical land and riverscapes.

目的：果实相互作用差异很大，但它们在区域尺度上的连通性和空间结构仍然知之甚少。使用元网络方法，我们的目标是测试大型河流及其相关的河岸栖息地是否通过连接其他隔离的本地网络而发挥“交互走廊”的作用。我们研究了两个相邻的新热带地区的鸟类果食性：旱生的查科和湿润的帕拉南，后者位于南美洲第二大低地河流系统形成的河流走廊内。地点：阿根廷圣达菲省。鸟类食果动物和肉质果植物的分类群。方法我们记录了跨越两个新热带生物地理域的6个森林地点的鸟类食果相互作用。然后，我们构建了聚合和特定领域的元网络，以测试站点是否通过河流连通性促进的生态相互作用而实现功能连接。我们量化了(i)连通性、巢性和模块性，（ii）相互作用中心性及其相关功能特征，（iii）评估了物种和相互作用的beta多样性，这使我们能够评估跨越空间和生物地理梯度的更替和巢性模式。结果聚集的元网络显示出一个核心（paran）和外围（Chaco）相连的区域，其特征是植物和相互作用的高更替，中等的鸟类更替和高的植物筑巢性。chaco网络具有较高的模块化，较低的连通性和嵌套性，以及较大的beta多样性。相比之下，paran网络表现出更高的连通性和更低的beta多样性、嵌套性和模块化。一直以来，大多数交互都是外围的和特定于站点的，只有一小部分交互连接了站点。性状分析显示帕拉帕纳族在相互作用角色方面存在差异，而查科族则没有。研究结果表明，大河及其相关的河岸生境作为物种扩散和相互作用的功能走廊，在大尺度上影响着果树元群落的空间结构。这对新热带陆地和河流景观的生物多样性保护和生态系统过程的维持具有重要意义。

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引用次数: 0

Interaction of Sequence Data and Paleogeographic Priors in Biogeographic Dating: How Could Biological Data Inform Time-Constrained Geological Models? 生物地理年代测定中序列数据和古地理先验的相互作用：生物数据如何为有时间限制的地质模型提供信息？

IF 3.6 2区环境科学与生态学 Q2 ECOLOGY

Journal of Biogeography

Pub Date : 2025-11-17 DOI: 10.1111/jbi.70098

Luke Sparreo, Ana M. Bedoya

<div> <section> <h3> Aim</h3> <p>Biological and geographic patterns and processes are linked such that biological data hold information on paleogeographical patterns and processes. Here, we aimed to test Biogeographic dating as a methodological framework for the integration of biological, paleontological and geological data to test paleogeographic hypotheses. In doing so, we test the potential for well-calibrated phylogenies and the impact of accuracy and uncertainty in geological priors for estimating paleogeographic events.</p> </section> <section> <h3> Location</h3> <p>Global.</p> </section> <section> <h3> Time Period</h3> <p>Various scales.</p> </section> <section> <h3> Taxa</h3> <p>Flora and Fauna.</p> </section> <section> <h3> Methods</h3> <p>We investigate the interaction of biological and paleogeographic data and priors in Biogeographic dating, where both are specified and analyzed simultaneously. We evaluate how uncertainty and accuracy in both types of datasets affect the inference of divergence times used as a proxy for generating or testing geological models. We used data simulation to generate a paleogeographic scenario and a nuclear sequence dataset for lineages whose evolution is correlated with geological patterns. Then, gene flow was simulated across landscape units, such that biological patterns inferred from sequence data would deviate from simulated times of paleogeographic change. Under those two scenarios, we specified broad, incorrect and accurate geological priors. These various scenarios were analyzed through Biogeographic dating analyses run in RevBayes and compared with our simulations.</p> </section> <section> <h3> Results</h3> <p>Models with flat paleogeographic priors (unknown geological models or lack of geological data) were able to accurately infer node dates when simulated biological data mirrored the pattern and timing of paleogeographic events. Gene flow results in divergence time estimates that deviate from the simulated scenario. Our findings also underscore the limitations and sources of error in the use of Biogeographic dating for informing species divergence times and paleogeographic models.</p> </section> <section> <h3> Conclusions</h3> <p>Our results indicate that Biogeographic dating is a plausible methodological framework for empirical studies integrating biological and geological data to test landscape change scenarios. However, caveats inherent t

目的将生物和地理的格局和过程联系起来，使生物数据包含古地理格局和过程的信息。在这里，我们的目的是测试生物地理测年作为一种整合生物学、古生物学和地质学数据来检验古地理假设的方法框架。在此过程中，我们测试了校准良好的系统发育的潜力，以及地质先验对估计古地理事件的准确性和不确定性的影响。位置全球。不同的尺度。植物群和动物群。方法研究生物和古地理数据的相互作用以及生物地理测年的先验，同时对两者进行说明和分析。我们评估了两种类型数据集的不确定性和准确性如何影响作为生成或测试地质模型的代理的散度时间的推断。我们利用数据模拟的方法生成了古地理情景和演化与地质模式相关的谱系核序列数据集。然后，模拟跨景观单元的基因流动，使序列数据推断的生物模式偏离模拟的古地理变化时间。在这两种情况下，我们规定了广泛的、不正确的和准确的地质先验。这些不同的场景通过RevBayes运行的生物地理测年分析进行了分析，并与我们的模拟进行了比较。结果当模拟生物数据反映古地理事件的模式和时间时，具有平坦古地理先验（未知地质模型或缺乏地质数据）的模型能够准确地推断节点日期。基因流动导致分化时间估计偏离模拟情景。我们的发现也强调了生物地理定年法用于物种分化时间和古地理模型的局限性和错误来源。结论生物地理定年是一种可行的方法框架，可用于整合生物和地质数据来测试景观变化情景。然而，在解释结果时，应考虑到模型假设和规范固有的警告，这些警告会导致较早的估计发散时间。实施这一框架应与选择良好的生物学研究系统相结合，通过对重点支系的仔细研究来实现。

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引用次数: 0

Aridification Shaped the Diversification of Bothriembryon Land Snails in a Global Biodiversity Hotspot 干旱化影响了全球生物多样性热点地区双胚蜗牛的多样性

IF 3.6 2区环境科学与生态学 Q2 ECOLOGY

Journal of Biogeography

Pub Date : 2025-11-17 DOI: 10.1111/jbi.70095

Frank Köhler, Corey S. Whisson, Nerida G. Wilson, Andrew M. Hosie, Abraham S. H. Breure, Lisa A. Kirkendale

<div> <section> <h3> Aim</h3> <p>Resolving the spatio-temporal diversification patterns and systematic relationships of endemic Australian land snails against the backdrop of Neogene aridification through analyses of a combined nuclear and mitochondrial DNA sequence dataset.</p> </section> <section> <h3> Location</h3> <p>Western Australia.</p> </section> <section> <h3> Taxon</h3> <p>Mollusca, Stylommatophora, Bothriembryontidae, <i>Bothriembryon.</i></p> </section> <section> <h3> Methods</h3> <p>We employed Bayesian Inference and Maximum Likelihood to reconstruct the phylogenetic relationships in a group of Australian land snails using mitochondrial (COI, 16S) and nuclear (ANT) DNA sequences. Divergence times have been estimated by employing optimised molecular clocks using BEAST2, and RelTime in MEGA12. Speciation and net-diversification rates have been modelled using revBayes to visualise diversification dynamics in lineage-through-time (LTT) plots. We employed automated species delimitation methods ASAP and bPTP to estimate taxonomic diversity.</p> </section> <section> <h3> Results</h3> <p>Our final sequence dataset contained 1052 new DNA sequences from 374 individuals, representing 97% of all accepted species plus 26 putatively new species based on morphology and distribution. Recognizing almost three times as many candidate species, both DNA-based species delimitation methods have excessively inflated diversity estimates, casting doubt on the usefulness of these methods in groups with marked phylogeographic structure. Nine well-supported principal clades were recovered. Fossil-calibrated chronograms revealed an early bifurcation of <i>Bothriembryon</i> followed by an accumulation of lineages over time. LTT plots revealed a relative flattening of the speciation curve from 15 to 10 Ma on. However, we also detected a steep increase in intraspecific lineage diversification during the last approx. 1 Ma. The modeled speciation and net diversification rates have continuously declined over the last 25 Ma, while extinction rates have remained relatively steady until about 5 Ma, when they also started to climb.</p> </section> <section> <h3> Main Conclusions</h3> <p>Declining diversification rates during much of the Neogene, followed by increasing extinction rates, coincided with increasing aridity throughout Western Australia. A more recent increase in lineage diversification rates, driven by intraspecific differentiation, coincides with the rise of mesic conditions since the

目的分析新近纪干旱化背景下澳大利亚特有地螺的时空多样化模式和系统关系。地点：西澳大利亚州。软体动物分类群，柱头虫目，双胎虫科。方法采用贝叶斯推理和最大似然方法，利用线粒体（COI, 16S）和核（ANT） DNA序列，重建澳大利亚钉螺的系统发育关系。通过使用BEAST2和MEGA12中的RelTime优化分子钟来估计散度时间。利用revBayes对物种形成和净多样化率进行了建模，以便在谱系-时间（LTT）图中可视化多样化动态。采用自动物种划分方法ASAP和bPTP进行分类多样性评估。结果最终的序列数据集包含来自374个个体的1052个新DNA序列，占所有被接受物种的97%，加上基于形态和分布的26个推定新种。两种基于dna的物种划分方法所识别的候选物种数量几乎是其三倍，这两种方法对物种多样性的估计都过于夸大，这使人们对这些方法在具有明显系统地理结构的种群中的有效性产生了怀疑。九个有良好支撑的主枝被发现。化石校正的年表揭示了双胚的早期分岔，随后是谱系的积累。LTT图显示，从15 ~ 10 Ma，物种形成曲线相对平缓。然而，我们也发现在最近的近似中种内谱系多样化急剧增加。1马。模拟的物种形成率和净多样化率在过去25 Ma中持续下降，而灭绝率一直保持相对稳定，直到大约5 Ma时，它们也开始攀升。新近纪大部分地区物种多样化率下降，随后物种灭绝率上升，这与整个西澳大利亚州的干旱加剧相吻合。最近由种内分化驱动的谱系多样化率的增加与自更新世末期以来中新环境的增加相吻合。这两种趋势都表明，通过影响灭绝和多样化的速度，历史上的气候变化很可能有助于形成以碎裂为特征的双胚陆生蜗牛当前的分布模式。此外，通过发现许多未被描述的分类群，包括多种短程特有物种，本研究突出了继续保护这一全球重要生物多样性热点的重要性。关键的栖息地，如岩石避难所，在其他恶劣和暴露的景观中，是双芽藓属抵御干旱化影响的重要据点。

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引用次数: 0

The Influence of Basin Fragmentation on the Genetic Structure of Neotropical Fishes 盆地破碎化对新热带鱼类遗传结构的影响

IF 3.6 2区环境科学与生态学 Q2 ECOLOGY

Journal of Biogeography

Pub Date : 2025-11-14 DOI: 10.1111/jbi.70092

Y. F. Briñoccoli, S. Bogan, A. Paracampo, Y. P. Cardoso

Aim

Basin fragmentation during dry climatic periods can divide drainage systems into isolated endorheic units, profoundly affecting the genetic structure of freshwater organisms. This study aims to perform a comparative phylogeographic analysis incorporating different freshwater fish species where we assessed the roles of isolation by distance (IBD), barriers (IBB) and environment (IBE) in shaping the genetic diversity of seven neotropical fish species using mitochondrial DNA.

Location

Argentina, Brazil and Uruguay endorheic and exorheic basins.

Taxon

Hypostomus cordovae, Rineloricaria catamarcensis, Oligosarcus jenynsii and Hoplisoma longipinne.

Methods

Samples were collected across multiple localities for each species and grouped based on basin type (endorheic vs. exorheic), hydrographic system and environmental criteria. Mitochondrial DNA (COI or D-loop) was sequenced, and phylogenetic reconstructions, haplotype networks, genetic diversity indices and population structure analyses were performed. Distance-based Redundancy Analysis (db-RDA) was used to evaluate the influence of isolation by distance (IBD), barriers (IBB) and environment (IBE) on genetic structuring. Environmental variables such as altitude, latitude and turbidity, vegetation cover, and land surface temperature were derived from remote sensing data.

Results

Basin fragmentation (IBB) is the main driver of genetic divergence in Hypostomus cordovae and Hoplisoma longipinne. Geographic distance (IBD) significantly influenced H. cordovae, Rineloricaria catamarcensis and Oligosarcus jenynsii (Continental Group), while environmental factors such as altitude (IBE) contributed to the structure of H. longipinne and O. jenynsii.

Main Conclusions

These findings emphasise the importance of adopting an integrative approach to understanding genetic diversification in freshwater organisms. They highlight the complex interplay of historical, geographical and ecological processes in fragmented river systems. Furthermore, they underscore the conservation significance of isolated endorheic basins as reservoirs of unique genetic lineages.

目的干旱期流域破碎化可将流域系统划分为孤立的内源性单元，对淡水生物的遗传结构产生深远影响。本研究旨在对不同淡水鱼进行比较系统地理学分析，评估距离隔离（IBD）、屏障隔离（IBB）和环境隔离（IBE）在利用线粒体DNA塑造7种新热带鱼类遗传多样性中的作用。地理位置阿根廷、巴西和乌拉圭为内旋和外旋盆地。分类群：cordovae， Rineloricaria chamarensis， Oligosarcus jennsii和Hoplisoma longipinne。方法根据流域类型（内河流域和外河流域）、水文系统和环境标准，在不同地点采集不同物种的样本。对线粒体DNA （COI或D-loop）进行测序，进行系统发育重建、单倍型网络、遗传多样性指数和群体结构分析。采用基于距离的冗余分析（db-RDA）评价了距离隔离（IBD）、屏障隔离（IBB）和环境隔离（IBE）对遗传结构的影响。环境变量，如海拔、纬度和浑浊度、植被覆盖和地表温度均来自遥感数据。结果盆地破碎化（IBB）是cordova和longipine Hoplisoma遗传分化的主要驱动因素。地理距离（IBD）对cordova、rineoricaria catamarcensis和Oligosarcus jenynsii （Continental Group）有显著影响，而海拔（IBE）等环境因素对longipinine和o.j enynsii的结构有影响。这些发现强调了采用综合方法来了解淡水生物遗传多样性的重要性。它们突出了历史、地理和生态过程在支离破碎的河流系统中的复杂相互作用。此外，它们强调了孤立的内河盆地作为独特遗传谱系的储层的保护意义。

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