Elemental analyses of leaf litter and sediments at three cove sites varying in their water quality inputs in lake wallenpaupack, Pennsylvania, USA
Titel:
Elemental analyses of leaf litter and sediments at three cove sites varying in their water quality inputs in lake wallenpaupack, Pennsylvania, USA
Auteur:
Daehler, Curtis C. Majumdar, Shyamal K.
Verschenen in:
Environmental technology
Paginering:
Jaargang 13 (1992) nr. 7 pagina's 657-669
Jaar:
1992-07
Inhoud:
White oak (Quercus alba) and red maple (Acer rubrum) leaves were submerged in mesh baskets at three cove sites varying in their water quality inputs at Lake Wallenpaupack in eastern Pennsylvania, USA. Cove 1 is surrounded primarily by a wetland preserve, cove 2 is surrounded by dense housing and in-ground septic systems, and cove 3 receives agricultural runoff input. Leaves and sediment samples were collected at two-week intervals and energy dispersive x-ray microanalysis was performed semi' quantitatively for major elemental constituents above atomic number 11. Leaf litter trace elements and sediment chemistry were analyzed by the testing laboratories of the Pennsylvania State University using IC plasma atomic absorption spectroscopy and ion specific probes, respectively. Leaf litter of both species in cove 1 was found to contain lower concentrations of Mn, Fe, Pb, and Zn as compared to litter from coves 2 and 3. Cove 1 leaf litter was often lower in P, S, and Cu compared that from cove 2 and 3. Sediments from coves 2 and 3 were higher in percent organic matter, nitrogen constituents, and several metals such as Ni, Cu, Mn, Fe, and Cd. It is suggested that these metals have accumulated to a greater degree at coves 2 and 3 due to deposition of particulate runoff and bioaccumulation. The accumulation of certain elements (Fe, Mn, Pb, Cu) in both sediment samples and leaf litter at the two anthropogenically disturbed sites suggests that local sediment and water quality conditions may influence elemental content of leaf litter.
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