Understanding temporal variability across trophic levels and spatial scales in freshwater ecosystems

作者：Tadeu Siqueira, Charles P. Hawkins, Julian D. Olden, Jonathan D. Tonkin, Lise Comte, Victor S. Saito, Thomas L. Anderson, Gedimar Pereira Barbosa, Núria Bonada‬‬‬‬‬‬‬‬‬‬‬, Cláudia Cósta Bonecker, Miguel Cañedo‐Argüelles, Thibault Datry, Michael B. Flinn, Pau Fortuño, Gretchen A. Gerrish, Peter Haase, Matthew J. Hill, James M. Hood, Kaisa‐Leena Huttunen, Michael Jeffries, Timo Muotka, Daniel R. O’Donnell, Riku Paavola, Petr Pařil, Michael J. Paterson, Christopher J. Patrick, Gilmar Perbiche‐Neves, Luzia Cleide Rodrigues, Susanne C. Schneider, Michal Straka, Albert Ruhí · 发表于：Ecology · 年份：2023 · DOI：10.1002/ecy.4219 · 被引用次数：29 · 研究领域：Animal Ecology and Behavior Studies、Plant and animal studies、Isotope Analysis in Ecology

A tenet of ecology is that temporal variability in ecological structure and processes tends to decrease with increasing spatial scales (from locales to regions) and levels of biological organization (from populations to communities). However, patterns in temporal variability across trophic levels and the mechanisms that produce them remain poorly understood. Here we analyzed the abundance time series of spatially structured communities (i.e., metacommunities) spanning basal resources to top predators from 355 freshwater sites across three continents. Specifically, we used a hierarchical partitioning method to disentangle the propagation of temporal variability in abundance across spatial scales and trophic levels. We then used structural equation modeling to determine if the strength and direction of relationships between temporal variability, synchrony, biodiversity, and environmental and spatial settings depended on trophic level and spatial scale. We found that temporal variability in abundance decreased from producers to tertiary consumers but did so mainly at the local scale. Species population synchrony within sites increased with trophic level, whereas synchrony among communities decreased. At the local scale, temporal variability in precipitation and species diversity were associated with population variability (linear partial coefficient, β = 0.23) and population synchrony (β = -0.39) similarly across trophic levels, respectively. At the regional scale, community syn...