Niche and neutral assembly mechanisms contribute to latitudinal diversity gradients in reef fishes
Niche and neutral assembly mechanisms contribute to latitudinal diversity gradients in reef fishes
复制标题
生态位和中性组装机制对珊瑚礁鱼类纬度多样性梯度的贡献
DOI：
10.1111/jbi.14237
复制
发表时间：
2021-08-15
影响因子：
3.9
通讯作者：
Tuya, Fernando
中科院分区：
文献类型：
--
作者：
Bosch, Nestor E.;Wernberg, Thomas;Tuya, Fernando
目的：生态位和中性机制对生态群落组装的影响一直存在争议。然而，我们仍然有一个有限的知识，他们的相对重要性，以解释跨纬度梯度（LDG）的多样性模式。在这里，我们调查在何种程度上，这些生态机制有助于LDG的珊瑚fishes.Location：东大西洋。分类：珊瑚礁相关的射线finned fishes.Methods：我们结合了丰富的数据，在类似的60度的纬度与功能性状数据和系统发育树。零模型的方法被用来解耦的功能（FD）和系统发育（PD）多样性的分类多样性（TD）的影响。标准化效应量（SES FD和SES PD）被用来探索过度分散，聚类和随机性的模式。信息理论方法被用来调查的作用大-（温度，地理隔离，硝酸盐和净初级生产力）和当地规模（人口和深度）的驱动程序。我们进一步评估了人口统计随机性及其与物种营养特性和扩散capability.Results的相互作用的作用：分类多样性的峰值在类似15度-20度N，第二模式的幅度较低，在类似45度N的模式，预测温度，地理隔离和生产力。热带地区表现出较高比例的overdispersed组合，而集群向温带地区增加。系统发育和功能的过度分散与温暖，多产和孤立的地区。人口统计随机性也在很大程度上有助于社区大会，独立的ecoregions，虽然变化是依赖于营养特性和身体大小的species.Main结论：生态位为基础的过程连接热和资源的限制，当地的共存机制作出了贡献的LDG在珊瑚礁鱼类。这些过程并不是孤立的，强调了了解在生物多样性迅速变化的情况下驱动群落结构的确定性和随机性因素之间的相互作用的重要性。
Aim: The influence of niche and neutral mechanisms on the assembly of ecological communities have long been debated. However, we still have a limited knowledge on their relative importance to explain patterns of diversity across latitudinal gradients (LDG). Here, we investigate the extent to which these ecological mechanisms contribute to the LDG of reef fishes.Location: Eastern Atlantic Ocean.Taxon: Reef-associated ray-finned fishes.Methods: We combined abundance data across similar to 60 degrees of latitude with functional trait data and phylogenetic trees. A null model approach was used to decouple the influence of taxonomic diversity (TD) on functional (FD) and phylogenetic (PD) diversity. Standardized effect sizes (SES FD and SES PD) were used to explore patterns of overdispersion, clustering and randomness. Information theoretic approaches were used to investigate the role of large- (temperature, geographic isolation, nitrate and net primary productivity) and local-scale (human population and depth) drivers. We further assessed the role of demographic stochasticity and its interaction with species trophic identity and dispersal capacity.Results: Taxonomic diversity peaked at similar to 15 degrees-20 degrees N, with a second mode of lower magnitude at similar to 45 degrees N; a pattern that was predicted by temperature, geographic isolation and productivity. Tropical regions displayed a higher proportion of overdispersed assemblages, whilst clustering increased towards temperate regions. Phylogenetic and functional overdispersion were associated with warmer, productive and isolated regions. Demographic stochasticity also contributed largely to community assembly, independently of ecoregions, although variation was dependent on the trophic identity and body size of species.Main conclusions: Niche-based processes linking thermal and resource constraints to local coexistence mechanisms have contributed to the LDG in reef fishes. These processes do not act in isolation, stressing the importance of understanding interactions between deterministic and stochastic factors driving community structure in the face of rapid biodiversity change.