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Metal toxicity inferred from algal population density, heterotrophic substrate use, and fatty acid profile in a small stream
Author(s) -
Genter Robert B.,
Lehman R. Michael
Publication year - 2000
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620190413
Subject(s) - periphyton , algae , diatom , heterotroph , environmental chemistry , ecology , green algae , biology , substrate (aquarium) , population , chlorophyta , botany , environmental science , chemistry , bacteria , genetics , demography , sociology
Abstract The purpose of this study was to examine relations between metal concentrations in periphyton and the abundance of algal species, heterotrophic use of 95 carbon sources, and phospholipid fatty acids (PLFA) of the periphyton in a small stream spanning a mine in Lemhi County, Idaho, USA. Two upstream, two mine, and two downstream sites were examined. Elevated concentrations of As and Cu at the mine sites were associated with communities that were depleted of diatoms and filamentous blue‐green algae and characterized by a low‐diversity community dominated by a single blue‐green alga and patchy populations of the diatom Achnanthidium minutissimum and a filamentous green alga. Carbon source use and PLFA profiles provided a rapid assessment of stream conditions that were consistent with algal taxonomy and with our hypotheses constructed from previous reports on periphyton responses to metal stress.