摘要
在2002年平水期对高原湖泊阳宗海和滇池中的紫色非硫细菌(PNSB)数量和种群结构进行了比较研究。对两湖中的各因子进行t检验,发现各因子和PNSB数量都有极显著差异,富营养化湖泊滇池中的PNSB数量远远多于贫营养化湖泊阳宗海;两湖中PNSB的优势种是红假单胞菌属,也有少数的红螺菌属。两湖种群结构的区别是滇池有红微菌,而阳宗海有大量红细菌。
Yangzonghai Lake and Dianchi Lake are two fault lakes among the nine plateau lakes in Yunnan Province, China. The former is a deep water and oligotrophicated lake, while the later is a shallow water and eutrophicated lake. The ecological factors, and the amount and structure of purple nonsulfer bacteria (PNSB) of these two lakes were studied in the even water season in 2002. The ecological factors included DO (dissolved oxygen), SD (Secchi disc), TN (total nitrogen), TP (total phosphorus), COD (chemical oxygen demand), BOD (biological oxygen demand) and Chl-a (chlorophyll-a). The results showed that (1) the levels of DO, TN, TP, COD, BOD and Chl-a were significantly higher in Dianchi Lake than in Yangzonghai Lake (t-test, p<0.01); (2) the number of PNSB in Dianchi Lake was 76.9±6.94 cells/ml (mean±SE), 6.0±0.18 cells/ml in Yangzonghai Lake; (3) Rhodopseudomonas was the dominant PNSB genus in Yangzonghai Lake and Dianchi Lake, 59.2% and 62.2% respectively, Rhodospirillum was 4.2% and 10.8%, respectively. The major difference in PNSB structure was that Rhodobacter (36.6%) was only found in Yangzonghai Lake, whereas Rhodomicrobium (27.0%) was only in Dianchi Lake. These data suggested that ecological factors are strongly associated with the abundance and structure of PNSB in Yangzonghai Lake and Dianchi Lake.
出处
《生态学报》
CAS
CSCD
北大核心
2005年第6期1337-1340,共4页
Acta Ecologica Sinica
基金
国家"863"资助项目(2002AA213031)
国家自然科学基金资助项目(30260021)~~
