Nutritional Ecology of Great Lakes 'Cladophora glomerata'

摘要

Various bioassays, primarily plant analysis, were utilized to evaluate relative nutrient supplies and primary growth limiting nutrients for Cladophora glomerata growth in parts of Green Bay, Lake Michigan, known to differ markedly in degree of pollution. Preliminary studies indicated emphasis should be on evaluations of five nutrients: phosphorus, nitrogen, boron, sulfur, and vitamin B1. The bioassays indicated that phosphorus very likely is the critical nutrient in nuisance C. glomerata growths and that at times phosphorus supply actually is reduced to growth-limiting concentrations. However, the possibility that vitamin B1 may at times be critical to C. glomerata cannot as yet be eliminated.