本研究调查了在两种不同的潮下环境中,小型动物的时空分布和相应的环境变量。这两个栖息地代表着独特的地理位置;(1)金海湾为半封闭的工业湾(在人为压力下),(2)桑切克海岸为韩国的公海地区(而不是自然条件)。对两个研究区的6个监测站进行了为期3年(2013-16年)的生物和非生物数据的季节性收集,并对所有数据进行了比较分析。首先,非生物数据,例如沉积物特性和水质参数,显示出研究区域和每个区域内的时间(季节/年)和空间(地点/面积)存在显着变化。第二,meiofauna组合,例如分类单元的数量,丰度,和组成,季节和地区之间差异很大,反映与当地活动和/或环境梯度的直接关联。值得注意的是,金海湾社区在夏季受到缺氧的直接影响。总的来说,特定地点的变化掩盖了季节性波动,表明海洋学环境和陆地土地利用活动的重要性。在测量的环境参数中,沉积物颗粒大小似乎是决定海洋组合和分布的关键因素,特别是在Samcheok的自然条件下。总之,Meiofaunal社区跨站点的明显分隔(内部与外部车站)和区域(封闭式工业湾与公海)暗示人为压力和某些受影响的边界。此外,底栖群落与人为环境的联系似乎在大型动物群落中盛行,同时受到非生物季节性波动的影响。总的来说,两个对比鲜明的近岸栖息地表现出典型的潮下底栖群落时空分布,它们共同受到人为胁迫和特定地点环境梯度的影响。
The present study investigated the spatiotemporal distributions of meiofauna and corresponding environmental variables in two different subtidal environments. The two habitats represent unique geographical localities; (1) Jinhae Bay for semi-enclosed industrial bay (under anthropogenic pressure) and (2) Samcheok coast for open sea area (rather in natural condition) in Korea. Biotic and abiotic data were seasonally collected from six monitoring stations in each area for 3 years (2013-16) at two study areas and all the data were comparatively analyzed. First, abiotic data such as sediment properties and water quality parameters showed significant variations in time (season/year) and space (site/area) cross the study areas and within sites in each area. Second, meiofauna assemblages, such as number of taxa, abundance, and composition, greatly varied between seasons and localities, reflecting (in)direct association(s) to local activities and/or environmental gradients. Of note, the Jinhae Bay community was directly influenced by a hypoxia during summer season. In general, the site-specific variations rather prevailed masking seasonal fluctuations, indicating significance of both oceanographic settings and terrestrial land use activities. Among the environmental parameters measured, sediment grain size appeared to be the key factor in determining the meiofaunal assemblages and distributions, particularly under natural condition shown at Samcheok. Altogether, clear separations in meiofaunal community cross sites (inner vs. outer stations) and areas (enclosed industrial bay vs. open sea) implied anthropogenic pressures and certain impacted boundaries. In addition, association of benthic communities to anthropogenic environments seemed to prevail in macrofaunal community, being simultaneously influenced by abiotic seasonal fluctuations. Overall, two contrasting nearshore habitats exhibited typical spatiotemporal distributions of subtidal benthic communities being collectively influenced by anthropogenic stresses and site-specific environmental gradients.