Endemic Guadalupe bass (Micropterus treculii) are supported by isotopically distinct resources in tributary versus mainstem river food webs
June 23, 2022
We used stable isotope analysis to investigate differences in Guadalupe bass (Micropterus treculii) resource use that might be associated with population-level variation in mainstem river versus tributary stream habitats. Guadalupe bass from mainstem sites had higher δ13C and δ15N values compared to those collected in tributaries, likely reflecting greater importance of algae as a basal resource and influences of urban wastewater in mainstem habitats. Documenting ecological variation across ecosystem types is important to inform fish conservation efforts, especially for species that occupy a range of stream sizes.
Citation Information
Publication Year | 2022 |
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Title | Endemic Guadalupe bass (Micropterus treculii) are supported by isotopically distinct resources in tributary versus mainstem river food webs |
DOI | 10.1002/rra.4015 |
Authors | Allison A. Pease, Jessica E. Pease, Preston T. Bean, Timothy B. Grabowski |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | River Research and Applications |
Index ID | 70255191 |
Record Source | USGS Publications Warehouse |
USGS Organization | Coop Res Unit Seattle |