Effect of Salmon Carcass Decomposition on Lake Superior Tributary Streams
| Autor: | Jeffrey A. Schuldt, Anne E. Hershey |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
chemistry.chemical_classification
geography Biomass (ecology) geography.geographical_feature_category animal diseases Phosphorus chemistry.chemical_element STREAMS Aquatic Science Fishery Nutrient Animal science chemistry Tributary Environmental science Ecosystem Organic matter Periphyton Ecology Evolution Behavior and Systematics |
| Zdroj: | Journal of the North American Benthological Society. 14:259-268 |
| ISSN: | 1937-237X 0887-3593 |
| DOI: | 10.2307/1467778 |
| Popis: | We investigated the fate of organic matter and inorganic nutrients derived from spawning runs of chinook salmon in tributary streams to Lake Superior during fall and winter 1990. Upstream-downstream comparisons and experimental introduction of carcasses were used to determine how salmon carcass decomposition influenced several stream ecosystem components, including total phosphorus, total nitrogen, soluble reactive phosphorus (SRP), NO 3 - , NH 4 + , periphyton biomass, and fine particulate organic matter (FPOM) in transport. Total phosphorus, SRP, and periphyton biomass were higher in a river reach that received a spawning run of an estimated 1200 fish than in an upstream reach that lacked spawning salmon. No upstream-downstream gradient in these components occurred in a river that did not receive a spawning run. Total phosphorus, SRP, and periphyton also were elevated where we experimentally introduced salmon carcasses, in the absence of a natural salmon run. Stable... |
| Databáze: | OpenAIRE |
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