All creatures great and small: patterns in the stream benthos across a wide range of metazoan body size
All creatures great and small: patterns in the stream benthos across a wide range of metazoan body size
复制标题
所有大大小小的生物：各种后生动物体型大小的溪流底栖动物的模式
DOI：
10.1046/j.1365-2427.2003.01025.x
复制
发表时间：
2003
影响因子：
2.7
通讯作者：
A. Hildrew
中科院分区：
文献类型：
--
作者：
Tracey K. Stead;J. M. Schmid;A. Hildrew
摘要 1. 1999 年 3 月至 2000 年 4 月期间，对英格兰东南部一条酸性、无鱼溪流的整个后生动物群落（即包括小型底栖动物）进行了为期 14 个月的调查。在每次采样时都根据物理化学变量对无脊椎动物密度、生物量和分类丰富度进行了评估。
2. 小型动物比大型动物数量更多、种类更多，但它们的总生物量有时与大型动物相等。
3. 小型动物和大型动物组合似乎对不同的环境因素做出反应。小型动物群在全年中表现出真正的物种更替，而大型动物群尽管密度存在很大变化，但在分类组成上变化较小。
4. 这些数据表明，小型动物和大型动物存在于不同的时间和空间尺度，并以不同的“纹理”感知其环境。
SUMMARY 1. The whole metazoan community (i.e. including the meiofauna) of an acidic, fishless stream in south-east England was surveyed over 14 months between March 1999 and April 2000. Invertebrate density, biomass and taxonomic richness were assessed on each sampling occasion in relation to physico-chemical variables.
2. The meiofauna were more numerous and diverse than the macrofauna, while their total biomass occasionally equalled that of the macrofauna.
3. The meiofaunal and macrofaunal assemblages appeared to respond to different environmental factors. The meiofauna showed genuine species turnover through the year, while the macrofauna varied less in taxonomic composition though there were substantial variations in density.
4. These data suggest that the meiofauna and macrofauna exist at different temporal and spatial scales and perceive their environment with a different ‘grain’.