Are there "endemic" meiofauna in hadal zone?: Special changes inmeiofaunal community structure around trench regions

对千岛海沟(490-7090m)和琉球海沟(594-7150m)附近和海沟内的鳍足类群落组成进行了定量研究。在这两个地区，这些成分随着水深的变化而变化。虽然这两个地区较浅陆坡的高压类群落彼此相似，但海沟地区的群落相似性较低，这表明海沟中的群落是孤立的，因为它们很难迁徙到岛弧等水深屏障之外。

The community compositions of harpacticoid copepods were studiedquantitatively around and within the Kuril Trench (490-7090 m) and the Ryukyu Trench(594-7150 m). Those compositions changed with water depth in both areas. Whileharpacticoid communities in shallower continental slopes in the two regions were similareach other, a lower similarity was detected between communities in the trench regions,which suggests those communities in trenches are isolated because of difficulties inmigration beyond bathymetric barriers such as island arcs.