Ephemeroptera, Plecoptera And Trichoptera (Insecta) Abundance, Diversity And Role In Leaf Litter Breakdown In Tropical Headwater River
TROPICAL LIFE SCIENCES RESEARCH(2017)
Abstract
Leaf litter decomposition in a tropical stream was examined in two types of leaf packs; single species leaf packs of Pometia pinnata and two species leaf packs of equal combination of Pometia pinnata and Dolichandrone spathacea leaves. Both leaf packs were immersed in a river and weekly examined for remains of decomposed leaves and presence of EPT. In the control leaf packs, leaves in the two species leaf packs treatments decomposed within 35 days, faster than in single species leaf packs which decomposed after 42 days. In the presence of EPT, the leaf breakdown took 28 days in two species and 35 days for single species leaf packs. Higher abundance of EPT was observed in single species leaf packs but its diversity was higher in two species leaf packs. Litter breakdown in the stream was faster in the presence of EPT and softer leaves of D. spathacea with higher nitrogen content underwent faster decomposition and sustained higher numbers of EPT.
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Key words
Leaf Packs, Tropical River, Pometia pinnata, Dolichandrone spathacea, Leaf Breakdown
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