Primary Production and Leaf-Litter Decomposition in Natural and Channelized Portion of a Kansas Stream

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Abstract
The channelized portion of a 2nd-order Kansas [USA] Flint Hills stream had higher photosynthetic rates in midsummer and lower leaf degradation rates in winter than the more natural portion of the stream. Photosynthesis/respiration ratios were < 1 in the natural portion but > 1 in the channelized portion of the stream. Hackberry (Celtis occidentalis) leaves were degraded faster than chinquapin oak (Quercus muehlenbergii) leaves, losing an average of 90 and 50%, respectively, after 16 wk in the stream. Degradation was faster in the natural portion than in the channelized portion.

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