Macroalgae in Lake Illawarra, New South Wales, Australia

摘要: Macroalgal blooms are a recurring problem in Lake Illawarra, and other shallow urbanized estuaries throughout the world. Since 1988, macroalgal harvesting has been used as management tool although ecological impacts of this not yet known. Ecologically sustainable macroalgae requires knowledge environmental factors determining abundance diversity, key limiting growth those species. This paper reports on some main issues relating to excessive Illawarra. The biomass, distribution, species composition nutrient contents Illawarra were examined between 2000 2003. At least 35 (16 green, 10 red 9 brown) currently exist Lake, with most problematic being opportunistic chlorophyte Chaetomorpha linum. Macroalgae generally had high tissue nitrogen concentrations (up 3.87 % dry wt.), reflecting storage capacity, despite considered limited. biomass dropped considerably since mid-1990s, nuisance algal still occur periodically, particularly following wet weather.