Drying modulates cross-habitat subsidies and meta-ecosystem food webs in temporary saline inland waters

作者：Zeus Freixinos, Paloma Alcorlo, Rosa Gómez, Jesús Miñano, Judit Boadella, María del Mar Sánchez‐Montoya · 发表于：The Science of The Total Environment · 年份：2024 · DOI：10.1016/j.scitotenv.2024.177516 · 被引用次数：3 · 研究领域：Isotope Analysis in Ecology、Fish Ecology and Management Studies、Marine animal studies overview

The connections between aquatic and adjacent terrestrial ecosystem in inland water through cross-habitat subsidies are increasingly recognized. However, we still have a limited understanding on how temporal variations of environmental factors (e.g., hydrological conditions) affect these flows. To address this gap, we investigated the effects drying has on cross-habitat subsidy flows and meta-ecosystem food webs by integrating both aquatic and terrestrial communities across the different hydrological phases (wet, contraction, and dry) in temporary saline lotic and lentic ecosystems. We analyzed the δ 15 N and δ 13 C signatures of aquatic and terrestrial basal subsidies, aquatic and terrestrial invertebrates, distinguishing between aquatic, riparian, shoreline and dry bed habitats. In the two temporary inland waters studied, drying of aquatic habitat and the subsequent expansion of the terrestrial habitat, significantly influenced cross-habitat subsidies and the meta-ecosystem food webs. In the wet and contraction phases, we found that the importance of aquatic subsidies in terrestrial food webs was constrained to terrestrial invertebrates near the aquatic habitat. Also, the contraction phase led to higher consumption of aquatic subsidies by aquatic and shoreline invertebrates, through a higher predation between aquatic invertebrates, and an enhanced accessibility of terrestrial invertebrates to aquatic subsidies. Whereas, riparian invertebrates showed prevalence for terrestria...