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首页> 外文期刊>Marine ecology >The relationship among environmental variables, jellyfish and non-gelatinous zooplankton: A case study in the north of the Gulf of Oman
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The relationship among environmental variables, jellyfish and non-gelatinous zooplankton: A case study in the north of the Gulf of Oman

机译：环境变量，水母和非胶状浮游动物之间的关系：以阿曼湾北部为例

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Processes underlying the temporal and spatial variations observed in the distribution of jellyfish and non-gelatinous zooplankton in the Gulf of Oman are not well understood. This information gap is clearly a major issue in controlling the harmful blooms of jellyfish and non-gelatinous zooplankton. Samples of jellyfish and non-gelatinous zooplankton were collected from six stations in Chabahar Bay and three stations in Pozm Bay within four seasons. At each station, environmental variables were also recorded from bottom and surface water. A total of 83 individuals of medusae representing four species of Scyphozoa (i.e., Cyanea nozakii, Chrysaora sp., Pelagia noctiluca, Catostylus tagi) and species of Hydrozoa (i.e., Diphyes sp., Rhacostoma sp., Aequorea spp.) were observed in the study area. A total of 70,727.25individuals/m(-3) of non-gelatinous zooplankton dominated by copepods and cladocerans were collected in nine stations within the four seasons. The results of a RELATE analysis yielded no significant association between species composition for jellyfish and non-gelatinous zooplankton. Among environmental variables, water transparency, nitrite concentration, water depth and temperature were better associated with the total variation in jellyfish species composition than with that of non-gelatinous zooplankton. Dissolved oxygen, pH, and phosphate concentration were significant environmental variables associated with the variation in the spatial and temporal distribution patterns of non-gelatinous zooplankton assemblages. Although some jellyfish species (i.e., Rhacostoma sp., Pelagia noctiluca, Catostylus tagi) occur independently of non-gelatinous zooplankton assemblages, other jellyfish (i.e., Chrysaora sp., Aequorea spp., Cyanea nozakii, Diphyes sp.) are strongly correlated with non-gelatinous zooplankton assemblages.
机译：人们对在阿曼湾的水母和非胶状浮游动物分布中观察到的时空变化的潜在过程了解甚少。信息差距显然是控制水母和非胶状浮游植物有害繁殖的主要问题。在四个季节内，从查巴哈尔湾的六个站点和波兹姆湾的三个站点收集了水母和非胶质浮游动物的样本。在每个站点，还记录了底部和地表水的环境变量。在总共观察到83种水母，它们代表了4个种类的鳞翅目（Syphoa nozakii，Chrysaora sp。，Pelagia noctiluca，Catastoylus tagi）和Hydrozoa（即Diphyes sp。，Rhacostoma sp。，Aequorea spp。）。学习区。在四个季节内的九个站点中，总共收集了70,727.25个人/ m（-3）的以pe足类和锁骨类为主的非胶状浮游动物。 RELATE分析的结果表明，水母和非胶质浮游动物的物种组成之间没有显着关联。在环境变量中，与非胶质浮游动物相比，水透明度，亚硝酸盐浓度，水深和温度与水母物种组成的总变化更好地相关。溶解氧，pH和磷酸盐浓度是重要的环境变量，与非胶状浮游动物组合的时空分布格局有关。尽管某些水母种类（例如，Rhacostoma sp。，Pelagia noctiluca，Costostusus tagi）独立于非胶质浮游动物的组合而发生，但其他水母（例如，Chrysaora sp。，Aequorea spp。，Cyanea nozakii，Diphyes sp。）却与它们密切相关。非凝胶状浮游动物组合。

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