Marine Ecology Department, Institute of Oceanology, Polish Academy of Sciences, 81-712 Sopot, Poland; Laboratory of Polar Biology and Oceanobiology, Faculty of Biology and Environmental Protection, University of Łódź, 90-237 Łódź, Poland.
Department of Geosciences, Stony Brook University, Stony Brook, New York, USA; LEGOS, Observatoire Midi Pyrénées, 14 Ave Edouard Belin, 31400 Toulouse, France.
Mar Environ Res. 2018 May;136:106-119. doi: 10.1016/j.marenvres.2018.01.013. Epub 2018 Feb 2.
Inputs of submarine groundwater discharge (SGD) to the coastal ocean may alter local and regional-scale biology. Here, we report on nematode assemblages along the north shore of Long Island, NY. We test if nematode communities differed between sites impacted by mixed fresh-saline SGD and where SGD is exclusively saline. Diversity of nematodes was low at sites impacted by fresh SGD and communities were dominated by a few opportunistic genera. Moreover, a set of typical freshwater nematode genera restricted to impacted sites was observed. Their presence in the marine coastal zone is exceptional and underlines the structuring role that fresh SGD plays in the local ecosystem. Saline SGD structured nematode assemblages differently compared to sites impacted by fresh SGD. The number of nematode genera was markedly higher at saline SGD sites, with a different community structure. This study highlights the importance to which inputs of fresh SGD may have on local ecosystem diversity in marine coastal environments.
地下水向沿海地区排泄（SGD）的输入可能会改变局部和区域尺度的生物。在这里，我们报告了纽约长岛北岸的线虫组合。我们测试了受混合淡水-咸水 SGD 影响的地点和 SGD 仅为咸水的地点之间的线虫群落是否存在差异。受淡水影响的地点的线虫多样性较低，群落主要由少数机会主义属主导。此外，还观察到一组仅限于受影响地点的典型淡水线虫属。它们在海洋沿海地区的存在是异常的，强调了新鲜 SGD 在当地生态系统中所起的结构作用。与受淡水 SGD 影响的地点相比，咸水 SGD 对线虫组合的结构方式不同。在咸水 SGD 地点，线虫属的数量明显更高，群落结构也不同。这项研究强调了新鲜 SGD 的输入可能对海洋沿海环境中局部生态系统多样性的重要性。
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