CHROOCOCCOID CYANOBACTERIA IN LAKE ONTARIO: VERTICAL AND SEASONAL DISTRIBUTIONS DURING 1982 1
CHROOCOCCOID CYANOBACTERIA IN LAKE ONTARIO: VERTICAL AND SEASONAL DISTRIBUTIONS DURING 1982 1
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安大略湖的铬球藻蓝藻：1982 年的垂直和季节性分布 1
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
D. Lean
中科院分区：
文献类型：
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作者：
D. Caron;F. R. Pick;D. Lean
绿球蓝藻（直径0.7 ~ 1.3 μm）是安大略湖浮游生物的重要组成部分。利用荧光显微镜，发现这些微生物的密度变化了四个数量级，在最高水温的时间对应着一个大的丰度峰（6.5 × 105细胞mL−1）。这些蓝藻的形态和丰度与以前在海洋系统中发现的蓝藻相似。在此期间，它们占了epilimion细菌数量的10%，约占小于2.0 μm的原核生物生物量的40%，占所有小于20 μm的微生物生物量的30%。粒度分级研究表明，在丰度高峰时期，它们约占初级总产量的38%，并且在磷吸收中起重要作用。在异养微鞭毛虫的食物液泡和轮虫的肠道中观察到的蓝藻表明，后者可能是这种原核生物种群的重要消费者。
Chroococcoid cyanobacteria (0.7–1.3 μm in diameter) were discovered to be a significant component of the Lake Ontario plankton. Using epifluorescence microscopy, the densities of these microorganisms were found to vary by four orders of magnitude with a single large peak in abundance (6.5 × 105 cells mL−1) corresponding to the time of maximum water temperature. The morphology and abundance of these cyanobacteria were similar to those previously found in oceanic systems. They constituted 10% of the bacterial numbers in the epilimnion during this period, approximately 40% of the biomass of prokaryotes less than 2.0 μm, and 30% of the biomass of all microorganisms less than 20 μm in size. Size fractionation studies indicated that they were responsible for approximately 38% of the total primary production during times of peak abundance, and were important in phosphorus uptake. Cyanobacteria observed in the food vacuoles of heterotrophic microflagellates and in the guts of rotifers suggest that the latter organisms may be important consumers of this prokaryote population.