Unique habitat and macroinvertebrate assemblage structures in spring-fed stream: a comparison among clastic lowland tributaries and mainstreams in northern Japan
Unique habitat and macroinvertebrate assemblage structures in spring-fed stream: a comparison among clastic lowland tributaries and mainstreams in northern Japan
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DOI：
10.1007/s42974-021-00048-5
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发表时间：
2020-05
影响因子：
1.7
通讯作者：
M. Sakai;Katsuya Iwabuchi;D. Bauman
中科院分区：
文献类型：
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作者：
M. Sakai;Katsuya Iwabuchi;D. Bauman
泉水流的稳定流动和温度状态不同于其他流的动态状态。我们调查了栖息地和大型无脊椎动物组合之间的差异，三种流类型（春季喂养的支流，非春季喂养的支流，主流）在北方日本的碎屑低地。水流速度是最慢的泉水喂养的河段，在那里的细泥沙沉积的百分比也是3.8-11.4倍，比其他类型的流。在春季喂养的河段，碎屑的现存量也更大。这些结果表明，在泉水喂养的河流稳定的流态导致细泥沙和碎石的河床上的积累。Oligochaeta和摇蚊，这是穴居采集者，是非常丰富的春季喂养的范围。总的大型无脊椎动物丰度是3.8-12.2倍，在春季喂养的达到比其他流类型。在主流河段中，食草性蜉蝣类是最丰富的，这可能是由于较高的初级生产力。Allomyiasp，这取决于凉爽的春季喂养的栖息地，只发现在春季喂养的河段。指示种分析还显示出食蟹目和异颌鱼属的多个分类群。为泉水注入的支流。大型无脊椎动物组合的特点是众多的穴居人，采集者，和crenobiont类群，突出的独特性和它的贡献，以提高β多样性的河流网络。
The stable flow and temperature regimes of spring-fed streams are distinct from the dynamic regimes of other streams. We investigated differences in habitat and macroinvertebrate assemblages among three stream types (spring-fed tributary, non-spring-fed tributary, and mainstream) in a clastic lowland of northern Japan. Current velocity was the slowest in the spring-fed reach, where the percent of fine sediment deposition was also 3.8–11.4 times higher than in the other stream types. The standing stock of detritus was also greater in the spring-fed reach. These results suggest that the stable flow regime in the spring-fed stream leads to the accumulation of fine sediment and detritus on the streambed. Oligochaeta and chironomids, which are burrower-gatherers, were remarkably abundant in the spring-fed reach. Total macroinvertebrate abundance was 3.8–12.2 times greater in the spring-fed reach than in the other stream types. Sprawler-grazer ephemeropterans were the most abundant in the mainstream reaches, likely due to higher primary productivity.Allomyiasp, which depend on cool spring-fed habitats, was found only in the spring-fed reach. The indicator species analysis also indicated multiple taxa of detritivores andAllomyiasp. for the spring-fed tributary. The macroinvertebrate assemblage in the spring-fed reach was characterized by numerous burrowers, collector-gatherers, and crenobiont taxa, highlighting the uniqueness and its contribution to enhance beta diversity in river networks.