Active Uptake of Dissolved Organic Matter by Potamophylax cingulatus (Trichoptera) Larvae
- 1 December 1981
- Vol. 37 (3) , 345-348
- https://doi.org/10.2307/3544126
Abstract
Active uptake of dissolved 14C-labeled glucose is demonstrated in the larva of the freshwater caddis P. cingulatus (Steph). (Limnephilidae). In laboratory experiments the caddis larvae had an uptake rate of circa 14.6 .mu.g g-1. After 2 h the concentration of glucose in P. cingulatus reached about 7 times that of the surrounding medium (based on volume), while the figure previously demonstrated for a freshwater bivalve was only 3 times in 24 h. Limnephilid larvae have well developed chloride epithelia, structures which facilitate osmoregulation and permit the larvae of some species to live in brackish environments. The significance of this structure for the uptake of dissolved organic matter is discussed. The glucose uptake is calculated to be circa 1% of the amount of energy assimilated from leaves which are the main food of the larvae.This publication has 3 references indexed in Scilit:
- Transport of dissolved organic carbon in streams of differing physiographic characteristicsOrganic Geochemistry, 1979
- Life cycle of Limnephilus affinis Curt. (Trichoptera: Limnephilidae) in Iceland and in Northumberland, EnglandSIL Proceedings, 1922-2010, 1978
- DECOMPOSITION OF DISSOLVED ORGANIC CARBON AND NITROGEN COMPOUNDS FROM LEAVES IN AN EXPERIMENTAL HARD‐WATER STREAM1Limnology and Oceanography, 1972