Relationships between stream acidity and bacteria, macroinvertebrates, and fish: a comparison of north temperate and south temperate mountain streams, USA

Autor: Marcy P. Osgood, Carl L. Schofield, Amy D. Rosemond, Patrick J. Mulholland, Charles T. Driscoll, Jerry W. Elwood, Anthony V. Palumbo, Michael E. Smith
Rok vydání: 1992
Předmět:
Zdroj: ResearcherID
ISSN: 1573-5117
0018-8158
DOI: 10.1007/bf00027525
Popis: A comparative study of relationships between stream acidity and bacteria, macroinvertebrates, and fish in the Adirondack Mountains of upper New York state and in the Southern Blue Ridge Mountains of eastern Tennessee, USA, was conducted. Although the study sites in both regions spanned a pH range from approximately 4.5 to 6.4, considerably greater seasonal variability in pH and higher monomeric Al concentrations characterized the Adirondack sites. Relationships between several biological characteristics and stream water acidity were similar in both regions, including lower production of epilithic bacteria and bacteria on decomposing leaves, lower leaf decomposition rates, lower density and generic richness of scraper/grazer macroinvertebrates, particularly Ephemeroptera, and lower fish abundance and survival in more acidic streams. Densities of total macroinvertebrates and densities of macroinvertebrates and bacteria inhabiting or closely associated with stream sediments were generally not related to stream water acidity.
Databáze: OpenAIRE
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