COMMUNITY STRUCTURES OF HETEROTROPHIC BACTERIA OF COPEPOD FECAL PELLETS
COMMUNITY STRUCTURES OF HETEROTROPHIC BACTERIA OF COPEPOD FECAL PELLETS
复制标题
DOI：
10.1093/plankt/16.6.603
复制
发表时间：
1994-06-01
影响因子：
2.1
通讯作者：
RAZOULS, S
中科院分区：
文献类型：
--
作者：
DELILLE, D;RAZOULS, S
研究了地中海西北部海岸带桡足类Temora stylifera肠道和粪球中的总菌群和异养菌群。消化道和粪便中总是发现含有细菌。平均值接近10（11）个细胞ml-1和10（10）个菌落形成单位（CFU）ml-1，粪便颗粒中发现的总菌群和异养菌群大大超过周围海水中观察到的相应细菌微生物群（10（5）个细胞ml-1和10（3）CFU ml-1）。以同样的方式，分裂细胞的频率和平均细胞体积分别从海水中的3%和0.12 mum 3增加到粪粒中的>6%和0.24 mum 3。对147株分离菌株进行了29项形态学和生化试验，研究了细菌群落结构。虽然假单胞菌一直是最常见的属，但桡足类粪便颗粒中发现的细菌群落与海水中的细菌群落明显不同。弧菌在海水微生物区系中未检出，但在粪粒群落中普遍存在。在地中海的研究中，从亚南极存款饲养者（紫贻贝）和浮游动物分离的粪便细菌群落的潜在代谢特征之间的密切对应关系表明，粪便群落分化是一个更普遍的功能。
The total and heterotrophic bacterial microflora of gut and fecal pellets of the copepod Temora stylifera was studied in the coastal zone of the northwestern Mediterranean basin. Digestive tracts and feces were always found to contain bacteria. With mean values close to 10(11) cells ml-1 and 10(10)) colony-forming units (CFU) ml-1, both total and heterotrophic communities found in fecal pellets largely exceeded the corresponding bacterial microflora observed in surrounding seawater (10(5) cells ml-1 and 10(3) CFU ml-1). In the same way, the frequency of dividing cells and mean cell volumes increased, respectively, from 3% and 0.12 mum3 in seawater to >6% and 0.24 mum3 in fecal pellets. The bacterial community structure was investigated by carrying out 29 morphological and biochemical tests on 147 isolated strains. Although Pseudomonas was always the most frequently encountered genus, the bacterial communities found in copepod fecal pellets clearly differ from those inhabiting seawater. Vibrio species, which were not detected in seawater microflora, were always present in fecal pellet communities. The close correspondence observed between the potential metabolic characteristics of the fecal bacterial communities isolated from a subantarctic deposit feeder (Mytilus edulis) and from zooplankton in this Mediterranean study suggests that the fecal community differentiation is an even more general feature.