Mesotrophic lakes

During the summer, somebody measures how much light coming into a small mesotrophic lake is absorbed in the water column as a function of depth. He gets the following results ... 

Sampling. Water and sediments were sampled at the greatest depths of two mountain mesotrophic lakes in Nagano Prefecture, Lakes Kizaki-ko and Nakatsuna-ko. Sampling of the core sediments was made by using a core sampler devised by the author. 

Sample Collection. Pelagic lake-water samples were collected at Crystal Lake, an engineered mesotrophic lake in Champaign County, Illinois. It has an average depth of 10 feet with a maximum depth of 13 feet and is fed by ground-water from a 200-foot-deep well. For each sample 250-500 L of water was filtered with a plankton net and stored in 55-L polyethylene (Nalgene) containers until processed in the laboratory approximately 30 min later. 

Bunte, C., and M. Simon. 1999. Bacterioplankton turnover of dissolved free monosaccharides in a mesotrophic lake. Limnology and Oceanography 44 1862-1870. 

Simon, M. 1998. Bacterioplankton dynamics in a large mesotrophic lake. II. concentrations and turnover of dissolved amino acids. Archiv fiir Hydrobiologie 144 1—23. 

Schweitzer, B., and M. Simon. 1995. Growth limitation of planktonic bacteria in a large mesotrophic lake. Microbial Ecology 30 89—104. 

Holfeld, H. (1998). Fungal infections of the phytoplankton Seasonality, minimal host density, and specificity in a mesotrophic lake. New Phytol. 138, 507—517. 

Howard, D.E.. Evans, R.D., 1993. Acid-volatile sulfide (AVS) in a seasonally anoxic mesotrophic lake seasonal and spatial changes in sediment AVS. Environ. Toxicol. Chem. 12, 1051-1057. 

Sasseville, D. R., S. A. Norton R. B. Davis, 1975. Comparative interstitial water and sediment chemistry in oligotrophic and mesotrophic lakes, Maine, USA Verb. int. Ver. Limnol. 19 367-371. 

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