Deep-sea nematode assemblages of the Clarion-Clipperton Nodule Province (Tropical North-Eastern Pacific)
Deep-sea nematode assemblages of the Clarion-Clipperton Nodule Province (Tropical North-Eastern Pacific)
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克拉里昂-克利珀顿结核省（热带东北太平洋）的深海线虫组合
DOI：
10.1007/s12526-009-0029-0
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发表时间：
2010
影响因子：
1.6
通讯作者：
J. Galéron
中科院分区：
文献类型：
--
作者：
M. Miljutina;D. Miljutin;R. Mahatma;J. Galéron
对克拉里昂-克利珀顿结核省（东北太平洋盆地，北纬 14°，西经 130°，深度 4,947–5,046 m）法国矿区的深海线虫组合进行了种、属和科水平的研究。使用多核器和盒式核器获得材料。总共对来自 14 个站点的 2,174 名个体和 21 个样本进行了检查。采样区有结核（NB）部分的线虫组合与无结核（NN）部分的线虫组合显着不同。平均线虫密度为 103 inds/10 cm2。 NB和NN部分的平均线虫密度分别为69 inds/10 cm2和137 inds/10 cm2。总共至少发现了 325 个假定物种、97 个有效属和 33 个有效科。采样区域线虫种类的实际数量估计约为 510 种。最丰富的属是 Acantholaimus（33 种假定的物种）和 Thalassomonhystera（23 种假定的物种）。线虫个体中幼体、雄性和雌性的比例分别约为44%、23%和33%。所有线虫中约 2/3 为沉积物饲养者，约 1/3 为表层饲养者。研究区的线虫组合可认为是存在优势种变异的Theristus discolensis-Thalassomonhystera sp.3组合。 NN 点的优势种是 Theristus discolensis (12.2%) 和 Thalassomonhystera sp。 3（5.3%）。相反，在 NB 位点，Thalassomonhystera sp。 3 最为丰富（14.1%），其次是 T. discolensis（6.2%）。在属水平上，NN位点以Thalassomohystera（17.9%）、Theristus（13.0%）和Acantholaimus（12.8%）为主，而Theristus丰度只有NB位点的一半（6.4%）。 NN和NB位点最主要的科是Xyalidae（分别为28.1％和16.6％）、Monhysteridae（17.9％和25.3％）和Chromadoridae（16.2％和22.5％）。
The deep-sea nematode assemblages of the French mining claim area in the Clarion-Clipperton Nodule Province (the Northeastern Pacific Basin, 14°N, 130°W, depth 4,947–5,046 m) were studied at species, genus and family levels. Material was obtained using multicorers and box corers. In total, 2,174 individuals from 14 stations and 21 samples were examined. The nematode assemblages from the nodule-bearing (NB) part of the sampling area differed significantly from those at the nodule-free (NN) section. The average nematode density was 103 inds/10 cm2. The average nematode densities in the NB and NN parts were 69 inds/10 cm2 and 137 inds/10 cm2 respectively. Altogether, at least 325 putative species, 97 valid genera and 33 valid families were found. The real number of nematode species for the sampling area was estimated at about 510. The richest genera were Acantholaimus (33 putative species) and Thalassomonhystera (23 putative species). The proportions of juveniles, males and females among nematode individuals were about 44%, 23% and 33% respectively. About 2/3 of all nematodes were deposit-feeders and around 1/3 were epistrate-feeders. The nematode assemblage of the studied area may be considered to be a Theristus discolensis–Thalassomonhystera sp.3 assemblage with variation of the dominant species. The dominant species at the NN site were Theristus discolensis (12.2%) and Thalassomonhystera sp. 3 (5.3%). In contrast, at the NB site, Thalassomonhystera sp. 3 was most abundant (14.1%), followed by T. discolensis (6.2%). At genus level, Thalassomonhystera (17.9%), Theristus (13.0%) and Acantholaimus (12.8%) dominated at the NN site, whereas the abundance of Theristus was half of that (6.4%) at the NB site. The most dominant families at the NN and NB sites were Xyalidae (28.1% and 16.6%, respectively), Monhysteridae (17.9% and 25.3%) and Chromadoridae (16.2% and 22.5%).