학술논문

Intermittent rivers and ephemeral streams are pivotal corridors for aquatic and terrestrial animals.
Document Type
Article
Source
BioScience. Apr2023, Vol. 73 Issue 4, p291-301. 11p.
Subject
*EPHEMERAL streams
*AQUATIC animals
*ANIMAL mechanics
*RIVER ecology
*RESEARCH questions
*RIVER conservation
Language
ISSN
0006-3568
Abstract
Rivers are efficient corridors for aquatic animals, primarily under the assumption of perennial flow. However, the recognition that river drying is a common and widespread phenomenon requires reexamining animal movement through river networks. Intermittent rivers and ephemeral streams have been overlooked when studying animal movement, even though approximately 60% of the global river network dries. In the present article, we extend the current focus of river ecology by integrating the effects of drying on the movement of aquatic and terrestrial animals. Moreover, we introduce a conceptual model that challenges the current bias, which is focused on perennial waterways, by encompassing animal movement across hydrologic phases (nonflowing, flowing, dry, rewetting) and habitats (aquatic, terrestrial). We discuss their corridor function in conservation and restoration planning and identify emerging research questions. We contend that a more comprehensive and inclusive view of animal movement in dry channels will advance ecological understanding of river networks and respective conservation efforts. [ABSTRACT FROM AUTHOR]