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A benthic chamber for intensely metabolic lotic systems |
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| Authors: | Charles A S Hall Neal Tempel Bruce J Peterson |
| Institution: | 1. Section of Ecology and Systematics Langmuir Laboratory, Cornell University, 14853, Ithaca, New York 2. Department of Biology, Brookhaven National Laboratory, 11973, Upton, New York 3. Marine Biological Laboratory, 02543, Massachusetts, Woods Hole |
| Abstract: | We have designed a flow-through benthic chamber that has the desirable characteristics of: simulation of tidal currents, continuous operation, ability to measure photosynthesis, respiration and nutrient exchanges, and maintenance of near-ambient oxygen conditions in a highly metabolic environment. The apparatus is based on a 1.3 m long Plexiglas tunnel, closed at bith ends, with both constant circulation and periodic flushing. The results of a 9-month study at one location in Flax Pond, a Long Island, New York, tidal pond, show large seasonal variations, influences of both sunlight intensity and seasonality, and a P/R ratio of less than one. |
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