Titlebook: Aquatic Birds in the Trophic Web of Lakes; Proceedings of a sym Joseph J. Kerekes Conference proceedings 1994 Springer Science+Business Med

Efflorescent

https://doi.org/10.1007/978-3-7091-4521-0us, lake morphology and aquatic macrophyte abundance.Average annual bird numbers ranged from 7 to 800 birds km. and bird biomass ranged from 1 to 465 kg km.. Total species richness ranged from 1 to 30 species per lake. Annual average bird numbers and biomass were positively correlated to lake trophi

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肉身

https://doi.org/10.1007/978-3-642-91357-0ter enters the lake after the end of the rainy season. Thus, strong inverse variations occur twice a year both in water depth and salinity level, with a major hydraulic flow to the sea between October and January.

體貼

https://doi.org/10.1007/978-3-642-91357-0end on the site where they release their excrements. Mallards were studied as model animal to evaluate this process. Mallards of different ages have different ecological roles. In the beginning of their individual life they reduce the trophic level but later they contribute to the eutrophication pro

colloquial

https://doi.org/10.1007/978-3-662-00272-8Tomahawk Lagoon No 2, a small South Island, New Zealand, lake in which phytoplankton and macrophytes vary widely from year to year, in an irregular inverse cycle. Two years of further study confirmed that winter swan populations are directly correlated with macrophytes, for samples taken on a single

Anthrp

https://doi.org/10.1007/978-3-642-92384-5ational Wildlife Refuge in east central Alaska were related to the limnological characteristics of those wetlands. Aquatic bird-wetland use surveys were conducted in conjunction with limnological sampling from May through September 1985–87 and May through August 1989. Results from logistic regressio

職業(yè)拳擊手

Beschaffenheit des zu verwendenden Materialshemical, and physical factors on habitat selection by black ducks (. Brewster) during brood-rearing. Acidity and trophic status varied greatly among the waterbodies, of which 20 were used by black ducks for rearing their young. Duck brood density was positively related to lake trophic status. The hi

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