Intraspecifi c phenotypic differences in fish affect ecosystem processes as much as bottom – up factors
نویسندگان
چکیده
R. W. El-Sabaawi ([email protected]), C. Rakowski and A. S. Flecker, Dept of Ecology and Evolutionary Biology, Cornell Univ., Ithaca, NY 14853, USA. Present address for RWES: Dept of Biology, Univ. of Victoria, PO Box 1700, Station CSC, Victoria, BC V8W 2Y2, Canada. Present addressfor CR: School of Natural Resources and Environment, Univ.y of Michigan, Ann Arbor, MI 48109, USA. – R. D. Bassar and D. N. Reznick, Dept of Biology, Univ. of California, Riverside, CA 92521, USA. Present address for RDB: Dept of Environmental Conservation, Univ. of Massachusetts, Amherst, MA 01003, USA. – M. C. Marshall and C. Pringle, Odum School of Ecology, Univ. of Georgia, Athens, GA 306024, USA. – B. L. Bryan, Biology Dept, California State Univ. Dominguez Hills, Carson, CA 90747, USA. – S. N. Th omas, School of Natural Resources, Univ. of Nebraska, Lincoln, NE 68583, USA.
منابع مشابه
Modeling the effects of nutrient concentrations on ecosystem stability:
The effects of nutrients on algal productivity are not transferred directly to production at higher trophic levels and can not be modelled as if they were. Rates of processes and time scales at different trophic levels require a modular approach to a comprehensive model of the Great Lakes. Predator growth is based ultimately on prey availability and life histories of predators. Factors that con...
متن کاملWhen does fishing lead to more fish? Community consequences of bottom trawl fisheries in demersal food webs.
Bottom trawls are a globally used fishing gear that physically disturb the seabed and kill non-target organisms, including those that are food for the targeted fish species. There are indications that ensuing changes to the benthic invertebrate community may increase the availability of food and promote growth and even fisheries yield of target fish species. If and how this occurs is the subjec...
متن کاملBottom-up ecosystem trophic dynamics determine fish production in the Northeast Pacific.
We addressed the question of bottom-up versus top-down control of marine ecosystem trophic interactions by using annual fish catch data and satellite-derived (SeaWiFS) chlorophyll a measurements for the continental margin of western North America. Findings reveal a marked alongshore variation in retained primary production that is highly correlated with the alongshore variation in resident fish...
متن کاملEffect of Metacognitive Strategy Training and Perfectionism on Listening Comprehension Sub-Processes
The present study aimed to examine any possible relevance of perfectionism as a personal trait variable, in moderating the effectiveness of meta-cognitive instruction on bottom-up and top-down sub-processes of listening comprehension with a sample of EFL learners in Iranian context. To this end, 94 female EFL learners were selected from among 136 EFL learners at Andisheh Language Institute in M...
متن کاملBottom-up effects of climate on fish populations: data from the Continuous Plankton Recorder
The Continuous Plankton Recorder (CPR) dataset on fish larvae has an extensive spatio-temporal coverage that allows the responses of fish populations to past changes in climate variability, including abrupt changes such as regime shifts, to be investigated. The newly available dataset offers a unique opportunity to investigate long-term changes over decadal scales in the abundance and distribut...
متن کامل