Foliage, Leaf Litter, Stemflow and Throughfall W101 1975
Foliage, Leaf Litter, Stemflow and Throughfall W101 1975
Douglas F. Ryan
Morris Arboretum
9414 Meadowbrook Ave.
Philadelphia, PA 19118

Phone: (215)-247-5777
vegetation, leaf, foliage, litter, stemflow, throughfall, watershed 101, ws101.
Watershed 101
West bounding coordinate: -71.742196
East bounding coordinate: -71.736230
North bounding coordinate: 43.939933
South bounding coordinate: 43.935853
W101 Grid locations 3E2, 2, 5E2, 18, 7, 20, 12, 11W2 had 3 clip plots, litter traps, and throughfall collectors places at each. Locations referred to as A1, A2, B1, B2, C1, C2, D1, D2, respectively in plot designations. Stemflow collected at 3E2.
Objective was to measure foliar nutrient contents before and after autumn leaf senescence and foliar leaching during senescence to estimate resorption from senescing leaves. Leaves were clipped on 24 1x1m plots in August, leaf litter collected from 12 pin cherry trees in various DBH classes.
Leaves digested in concentrated H2SO4 and H202. Cations analyzed by atomic absorption spectrophotometry, nitrogen with Nesslers reagent and phosphorus with molybdovanadate reagent. Throughfall and stemflow samples composited before analysis.
  • Ryan, D.F. 1979. Nutrient resorption for senescing leaves: a mechanism of biogeochemical cycling in a northern hardwood forest ecosystem. PhD, Yale University.
  • Meyer, J.L. 1980. Dynamics of phosphorus and organic matter during leaf decomposition in a forest stream. Oikos 34:44-53.
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