Preliminary Study of Microbes on Rhodophyceae Seadweed in Mangrove Areas
- 生命科学－已发表论文 
初步研究了福建云霄、龙海和福鼎 3个红树林区红藻体上的微生物 ,结果表明 :红树林区红藻(鹧鸪菜 )体上异养微生物数量高 ,每克干藻样有百万个至千万个 ,其中以细菌占绝对优势 ,占总菌数的 90 %～ 99% ,霉菌居次 ,放线菌最少 .不同季节和红藻生长情况对藻体上异养微生物数量有明显的影响 ,红藻生长繁殖愈好 ,微生物数量愈多 .温度与藻体上微生物数量呈线性关系 ,尤与土温关系最密切 ,当土温升高至 17℃ ,藻体上微生物数量快速增多 .藻体上细菌以中温型 ,G-,杆菌占大宗 .每克干藻样含有数量达 4万以上的硫酸还原菌和约 18万的自生固氮菌 .The microbes on Rhodophyceae seadweed bodies in Yunxiao, Longhai and Fuding three mangrove areas of Fujian were studied. The results are as follows: 1) The amount of heterotrophic microbes on Rhodophyceae seadweed was aboundant, reaching 10 6~10 7 ind.g -1 dry sample, in which the amount of bacteria was dominant absolutely; its percentage in total amount was 90%~99%. The amount of filamentous fungi was second, and the amount of actinomyces was the least. 2) The amount of heterotrophic microbes on Rhodophyceae seadweed was obviously influenced by season and growing situation of Rhodophyceae seadweed; the more luxuriantly Rhodophyceae seadweed grew, the more abundant microbes were. The amount of microbes on Rhodophyceae seadweed was linearly correlated to environmental temperature, especially soil temperature. When the soil temperature rise to 17 ℃, the amount of microbes on Rhodophyceae seadweed increased rapidly. Most of bacteria on Rhodophyceae seadweed were mild thermophile, G -. 3) There were over 4.0×10 4 ind.g -1 dry sample sulphate reducing bacteria and about 18×10 4 ind.g -1 dry sample azotobacter on Rhodophyceae seadweed.