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Effects of a Non-Selective Arsenical Herbicide on Plant Biomass and Community Structure in a Fescue Meadow

Charles R. Malone
Ecology
Vol. 53, No. 3 (May, 1972), pp. 507-512
Published by: Wiley
DOI: 10.2307/1934242
Stable URL: http://www.jstor.org/stable/1934242
Page Count: 6
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Effects of a Non-Selective Arsenical Herbicide on Plant Biomass and Community Structure in a Fescue Meadow
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Abstract

Community structure and standing crop biomass of vegetation were affected similarly in a fescue meadow by single applications of sodium cacodylate and by severe heat stress. Recovery of species diversity and percentage similarly toward control levels was rapid, although not complete in one growing season. Repeated applications of the herbicide were necessary to suppress fescue growth, and this treatment regime caused sustained simplification of community structure and reductions in biomass throughout the growing season. Litter accumulated on heat-stressed areas, but its rapid decomposition on sprayed areas diminished an important nutrient sink and exposed the ecosystem of possible leaks in nutrient pools.

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