Leaf Litter Processing Rates in Four Texas Streams

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Abstract
Rates of leaf litter processing were investigated in 4 Texas streams during fall-winter. Assuming an exponential decay model, processing coefficients (-k) of some leaf species were among the highest yet reported (e.g., Celtis laevigata = 0.0619). Values for percentage loss/day ranged from 0.54-6.00. When compensated for the higher water temperatures found in these streams compared to more northern streams, processing rates were equivalent or even slightly lower. It is hypothesized that (on a per degree-day basis) this slower processing rate may result from the depauperate shredder fauna in such Texas streams.