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Let T r k : F 2 ⊗ GL k P H i (BV k) → Ext k,k+i A (F 2 , F 2) be the algebraic transfer, which is defined by W. Singer as an algebraic version of the geometrical transfer tr k : π S * ((BV k) +) → π S * (S 0). It has been shown that the algebraic transfer is highly nontrivial and, more precisely, that T r k is an isomorphism for k = 1, 2, 3. However, Singer(More)
It is well established that benthivorous fish in shallow lakes can create turbid conditions that influence phytoplankton growth both positively, as a result of elevated nutrient concentration in the water column, and negatively, due to increased attenuation of light. The net effect depends upon the degree of turbidity induced by the benthivores. Stocked(More)
Terrestrial chromophoric dissolved organic matter (CDOM) could subsidize lake food webs. Trophic state and altitude have a pronounced influence on the CDOM concentration and composition of a lake. The impact of future changes in solar radiation on high-altitude lakes is particularly alarming because these aquatic ecosystems experience the most pronounced(More)
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