Long-term trends in gastropod abundance and biodiversity: disentangling effects of press versus pulse disturbances.
Long-term trends in gastropod abundance and biodiversity: disentangling effects of press versus pulse disturbances.
复制标题
腹足动物丰度和生物多样性的长期趋势：压力与脉搏干扰的解开影响。
DOI：
10.1111/geb.13452
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发表时间：
2022
影响因子：
6.4
通讯作者：
Presley, S
中科院分区：
文献类型：
--
作者：
Willig, M.;Presley, S
AimInteractor丰富的主机-寄生虫网络，对应于寄生虫物种丰富的主机物种或主机范围的寄生虫物种，可以是一个功能的分类或性状的限制。出现在多个网络中的物种可以在每个网络中具有相似的相互作用丰富度，由于这些分类和性状的限制，导致在空间上保守的平均相互作用丰富度和较低的变化，相互作用丰富度相对于一个空的期望。在这里，我们使用宿主-蠕虫相互作用的全球数据库来检查299个宿主-蠕虫网络的空间显式集合中相互作用丰富度的变化。2003.主要分类群研究蠕虫寄生虫物种及其宿主物种。方法我们使用随机化测试来检查宿主和蠕虫物种的物种相互作用的空间保守性。相对于一组三个零模型，> 95%的宿主和蠕虫寄生虫物种的相互作用丰富度保持，其中每个物种的相互作用的平均数量和每个物种的相互作用数量的变化与随机抽取没有差异。此外，我们检测到寄生虫物种丰富度与宿主物种的零模型的分歧中的一个重要的分类学信号，表明与零预期的轻微偏离与宿主系统发育关系有关。这表明，同一物种的相互作用丰富度可能差异很大，宿主和蠕虫寄生虫物种在空间或地理上的相互作用网络中可能发挥非常不同的功能作用。环境梯度
AimInteractor richness in host–parasite networks, corresponding to either parasite species richness for host species or host range for parasite species, can be a function of taxonomic or trait constraints. Species appearing in multiple networks can have similar interactor richness in each network owing to these taxonomic and trait constraints, resulting in a spatially conserved mean interactor richness and lower variation in interaction richness relative to a null expectation. Here, we used a global database of host–helminth interactions to examine the variability in interactor richness across a spatially explicit collection of 299 host–helminth networks.LocationGlobal.Time period1800–2003.Major taxa studiedHelminth parasite species and their host species.MethodsWe used randomization tests to examine spatial conservation of species interactions for both host and helminth species.ResultsWe failed to detect a signal of interactor richness conservation for > 95% of host and helminth parasite species relative to a set of three null models, where both the mean number of interactions per species and the variation in the number of interactions per species did not differ from a random draw. Furthermore, we detected a significant taxonomic signal in divergence in parasite species richness from a null model for host species, indicating that slight departures from null expectations are related to host phylogenetic relationships.Main conclusionsOverall, this indicates that interactor richness can vary widely for the same species and that host and helminth parasite species can play very different functional roles in interaction networks across spatial or environmental gradients.