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- Title
Distribution patterns and niche segregation of three closely related Japanese ephemerid mayflies: a re-examination of each species' habitat from "megadata" held in the "National Census on River Environments".
- Authors
Okamoto, Seiya; Tojo, Koji
- Abstract
Changes in river environments due to elevation gradients have a great impact on living organisms. In particular, with respect to aquatic insects, it has been recognized that even in closely related species there is a tendency for species to be replaced between upstream and downstream environments. Such a distribution tendency has also been suggested for the three species of the genus Ephemera of interest in this study. We used the "Megadata" on the distribution of each Ephemera mayfly species and comprehensively analyzed habitat information, GIS and data on multiple environmental factors. As a result, it became clear that environmental factors closely related to the altitudinal gradient were closely related to the distribution patterns of three Ephemera mayflies. In addition, we simulated how their distribution areas have changed due to Quaternary climate change cycles using the software MAXENT. Although it was revealed that there were niche differentiations within the three Ephemera mayflies, there were overlaps in their respective preferred niche widths. Therefore, it is considered that the distribution pattern of the three Ephemera mayflies according to the altitudinal gradient represents mild niche differentiation, and also slight inter-species competition.
- Subjects
HABITAT partitioning (Ecology); MAYFLIES; AQUATIC insects; SPECIES; CENSUS; HABITATS
- Publication
Limnology, 2021, Vol 22, Issue 3, p277
- ISSN
1439-8621
- Publication type
Article
- DOI
10.1007/s10201-021-00654-2