Response of Microcystis spp. to iron additions in different regions of Lake Taihu，China
Harmful cyanobacterial blooms (CyanoHABs) represent a serious threat to drinking water supplies, and the ecological and economic sustainability in Lake Taihu , the third largest freshwater lake in China. Fe is an essential micronutrient for cyanobacterial major physiological functions and may be an important limiting nutrient in some regions of Taihu. Nutrient enrichment experiments involving the addition of iron (Fe) alone, as well as in combination with phosphorus (P) and/or nitrogen (N), were conducted in Meilinag bay characterized of Microcystis blooms and East lake bay characterized of absence of cyanobacteria blooms and dominanted macrophytes. In Meiliang bay, Enrichment with Fe, N and P alone did not result in a significant increase in the growth of cyanobacteria dominanted by Microcystis spp, but the combined addition of Fe, P, and N yielded same growth increases to combined addition of P and N, indicating Fe is not limiting nutrient, and N and P are co-limiting nutrients for growth of Microcystis spp. However in east lake bay, Fe addition alone stimulated signicantly Microcystis spp growth, and enrichment with N and P alone or combined addition of P and N did not result in a significant increase of growth of Microcystis spp, Fe is first limiting nutrient. Combined addition of Fe and P yielded greater biomass increases than the addition of Fe alone, while combined addition of Fe and N resulted in a same insease in growth to addition of Fe alone, showing P is second limiting nutrient, and N is not limiting nutrient in East lake bay.
Hai Xu Guangwei Zhu Boqiang Qin
State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, P.R.China
国际会议
武汉
英文
60
2011-04-05（万方平台首次上网日期，不代表论文的发表时间）