Rensselaer Polytechnic Institute. Fresh Water Institute.;
Research relating to Darrin Fresh Water Institute is funded by Rensselaer Polytechnic Institute and various U.S., N.Y. and local agencies. This digital document was created from a print copy prepared for Rensselaer Polytechnic Institute by the author(s). Use of this digital version is governed by a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.;
Research supported in part by the Eastern Deciduous Forest Biome, U.S. - International Biological Program, funded by the National Science Foundation under interagency agreement AG-199, BMS69-0147 A09 with the Atomic Energy Commission - Oak Ridge National Laboratory.; Eastern Deciduous Forest Biome IBP memo report 75-7.