1 - 10 of 14 articles
Natural phytoplankton from Lake Constance was exposed to competition experiments in continuous culture at 6 different molar rations of P∶Si as potentially limiting nutrients. As predicted by theory there was competitive exclusion of all species but one at single nutrient limitation, and...
About one third of the Dutch environmental research is concentrated on aquatic problems. The largest number of these projects is physicochemical (65%) and 47% of the aquatic projects contains an ecological component. The aquatic research projects are executed in a large number of different...
A general, simple and explicit model has been constructed for the age-dependent growth and reproduction of individuals in relation to their food supply. The model assumes a Holling type functional response coupled to a Von Bertalanffy body growth law, a fixed ratio between the energy channelled...
A number of developments in the Dutch inland fisheries during the last century are described. They indicate a structural change in the fishery as well as in the ecosystem. For the fishery management by sport fishermen a new set of criteria has to be developed along the existing one based on the...
Micro-ecosystems might play an important role in the evaluation of the environmental hazards of toxic substances. Besides arguments that micro-ecosystems in principle can be expected to be more sensitive than classical mono-species tests are, it must be stressed that an evaluation of the effect...
Different influences, like changes in salinity and temperature, the effects of heavy metals like copper and mercury, and the influences of nitrate and silicate deficiencies on the shape, generation time, and yield of the marine plankton diatomBiddulphia sinensis were tested in batch cultures....
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