By Werner Suter (auth.), Joseph J. Kerekes (eds.)
Birds are a vital part of such a lot freshwater ecosystems (lakes, rivers, wetlands) yet their function within the trophic dynamics of those water our bodies has frequently been ignored. As a conspicuous a part of the biota of water our bodies, aquatic birds are symptoms in their trophic kingdom either when it comes to species composition (quality) in addition to occupancy and breeding (quantity). Birds can also impact the trophic country of a water physique through uploading food (.e.g. resident or migrating birds feeding on adjoining watersheds or the sea). as a result of anthropogenic actions, predation or their mobility, birds won't make the most of another way appropriate aquatic habitat. those components complicate the connection among aquatic chicken creation and the trophic prestige of habitats. subsequently, the position of aquatic birds in freshwater ecosystems has frequently been missed.
This quantity features a wide variety of papers chosen from these provided on the symposium and reviewed.
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Extra resources for Aquatic Birds in the Trophic Web of Lakes: Proceedings of a symposium held in Sackville, New Brunswick, Canada, in August 1991
Long term studies on Simulium vittatum Zett. (Diptera: Simuliidae) in the River Laxa, North Iceland, with particular reference to different methods used in assessing population changes. Verh. int. Ver. Limno!. 23: 2179-2188. Hill, D. , 1984. Population regulation in the Mallard (Anas platyrhynchos). J. animo Eco!. 53: 191-202. Holmes, R. T, T W. Sherry & F. W. Sturges, 1986. Bird community dynamics in a temperate deciduous forest: Long-term trends at Hubbard Brook. Eco!. Monogr. 56: 201-220. Holmes, R.
G. v. Blotzheim, 1966-1982. Handbuch der Vogel Mitteleuropas. Vol. 1-9. Akademische Verlagsgesellschaft, Frankfurt am Main. , 1972. Reproduction and fluctations in the size of duck populations at Lake Myvatn, Iceland. Oikos 23: 35-38. Bioconsult, 1984. Recipientundersogelse af Nive A-systemet. Copenhagen. Cain, B. , 1976. Energetics of growth of Black-bellied Tree Duck. Condor 78: 124-128. Clapham, W. B. , 1983. Natural ecosystems. , New York. Cowiconsult, 1983. Recipientundersogelser af Nive Asystemet og Nive A Bugt.
29 I EC = epifaunal chironomids, TC = total chironomids, WT = weighted total of chironomids and Simulium, as in Table 3. 0 1. Harlequin productivity two years previously was the main determinant. In Scaup and Scoter productivity one year and three years before both contributed significantly to change in spring numbers. The Barrow's Goldeneye did not show a relationship between previous production of young and change in spring numbers, and we did not have data on production in Red-breasted Merganser.