Stream Ecosystem Dynamics of the Salmon River, Idaho: An 8th-Order System
| Autor: | G. Wayne Minshall, James R. Sedell, Robin L. Vannote, Robert C. Petersen, Thomas L. Bott, Colbert E. Cushing, Kenneth W. Cummins |
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| Rok vydání: | 1992 |
| Předmět: | |
| Zdroj: | Journal of the North American Benthological Society. 11:111-137 |
| ISSN: | 1937-237X 0887-3593 |
| DOI: | 10.2307/1467380 |
| Popis: | Studies were conducted at three locations in the Lower Salmon River, Idaho (USA) and at one Upper Salmon "calibration" site to extend results of previous research (headwater through 5-6th-order [1-814 links] streams) to an 8th-order (15,000 links) river. Transported organic matter (TOM) generally increased downstream. Coarse TOM was prevalent only in the upper 50 km of the system, and ultrafine was the predominant particulate component throughout the system. Stored (benthic) organic matter (OM) was highest in the headwaters and showed a progressive downstream decrease. The headwaters were highly retentive of coarse particulate organic matter (CPOM) but much less so of the fine and ultrafine fractions. Transported and stored OM approached a balance only in the lowermost (deeper) reaches of the river system. Analyses of the components of ecosystem metabolism revealed that gross primary production and respiration (R) both showed a general downstream increase. Overall, the net metabolism measurements showed t... |
| Databáze: | OpenAIRE |
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