Semi-quantitative metabarcoding reveals how climate shapes arthropod community assembly along elevation gradients on Hawaii Island
Semi-quantitative metabarcoding reveals how climate shapes arthropod community assembly along elevation gradients on Hawaii Island
复制标题
半定量元条形码揭示了气候如何影响夏威夷岛沿海拔梯度的节肢动物群落组装
DOI：
10.1111/mec.16323
复制
发表时间：
2022
影响因子：
4.9
通讯作者：
Rosemary G. Gillespie & Henrik Krehenwinkel
中科院分区：
文献类型：
--
作者：
Jun Ying Lim;Jairo Patino;Suzuki Noriyuki;Luis Cayetano;Rosemary G. Gillespie & Henrik Krehenwinkel
气候条件沿海拔梯度的空间变化为群落的聚集和多样化提供了重要的背景。低地栖息地往往随着时间的推移而相连，而高地则可以连续或周期性地隔离，这些条件被认为会促进高水平的物种特有性。预计这种趋势在给定气候范围内表现出利基保守性的类群中会加剧。虽然物种分布建模方法允许对目标类群中的生态位保守性进行广泛探索，但对该现象的广泛理解需要对整个群落进行采样。鉴于节肢动物等物种丰富的群体在许多生态系统中发挥着重要的功能作用，它们是了解沿海拔梯度的生态和生物多样性动态的理想案例研究，但由于其巨大的多样性，群落层面的研究受到限制。在这里，我们开发了一种新颖的半定量元条形码方法，该方法结合了标本计数和尺寸分类，以表征夏威夷岛两个不同火山沿海拔横断面的节肢动物群落水平多样性模式。我们发现，在较高海拔处，两条样线之间的节肢动物群落的组成变得越来越不同。阻力面方法表明，采样地点之间的气候差异是形成β多样性模式的重要驱动因素，尽管气候的相对重要性因分类群而异。然而，样带之间 OTU 的气候生态位位置高度相关，表明气候过滤器塑造了相邻火山之间的殖民化。综上所述，我们的结果强调了气候生态位保守主义是塑造沿海拔梯度生态组合的重要因素，并表明地形复杂性是多样化的重要驱动因素。
Spatial variation in climatic conditions along elevation gradients provides an important backdrop by which communities assemble and diversify. Lowland habitats tend to be connected through time, whereas highlands can be continuously or periodically isolated, conditions that have been hypothesized to promote high levels of species endemism. This tendency is expected to be accentuated among taxa that show niche conservatism within a given climatic envelope. While species distribution modeling approaches have allowed extensive exploration of niche conservatism among target taxa, a broad understanding of the phenomenon requires sampling of entire communities. Species‐rich groups such as arthropods are ideal case studies for understanding ecological and biodiversity dynamics along elevational gradients given their important functional role in many ecosystems, but community‐level studies have been limited due to their tremendous diversity. Here, we develop a novel semi‐quantitative metabarcoding approach that combines specimen counts and size‐sorting to characterize arthropod community‐level diversity patterns along elevational transects on two different volcanoes of the island of Hawai‘i. We found that arthropod communities between the two transects became increasingly distinct compositionally at higher elevations. Resistance surface approaches suggest that climatic differences between sampling localities are an important driver in shaping beta‐diversity patterns, though the relative importance of climate varies across taxonomic groups. Nevertheless, the climatic niche position of OTUs between transects was highly correlated, suggesting that climatic filters shape the colonization between adjacent volcanoes. Taken together, our results highlight climatic niche conservatism as an important factor shaping ecological assembly along elevational gradients and suggest topographic complexity as an important driver of diversification.