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A mechanistic physiological model for the growth of bracken has been developed which describes its yearly cycle in terms of three compartments: frond ...
Read moreThe use of stable isotopic techniques to study animal diets and trophic levels requires a priori estimates of discrimination factors (Δ13C and Δ15N, a...
Read moreThe effects of cutting frequency, time of year and leaf age on the appearance of 137Cs in shoots of Agrostis capillaris were studied in a pot experime...
Read moreThe large-scale use of organochlorine compounds in insect control causes increasing concern due to their toxicity and persistance which creates enviro...
Read moreResearch in agricultural ecosystems is uncovering how the management of crop fields leads to the delivery of transgenic crop residues to adjacent wate...
Read moreThe demographic effects of an organochlorine contaminant on the dioecious aquatic macrophyte Vallisneria americana are reported. Plants were sampled f...
Read moreSoil samples were from each side and the central grass strip of highway U.S. Rt. 29 north of Charlottesville, Va., USA, with average flow of 12 470 ve...
Read moreA study was made of the effect of secondarily treated effluent on the phosphorus budget of a central Florida freshwater marsh. Three 2000 m2 plots rec...
Read moreFunctional traits offer promising avenues to investigate how community composition and diversity define ecosystem functioning and service delivery. In...
Read moreThe mean nitrate reductase activity (NRA) of leaf tissue, from various nitrogen environments, was four times greater in Sporobolus pyramidalis than in...
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