Recent change in benthic macrofaunal community composition in relation to physical forcing in the Pacific Arctic
Recent change in benthic macrofaunal community composition in relation to physical forcing in the Pacific Arctic
复制标题
太平洋北极地区大型底栖动物群落组成与物理强迫相关的最新变化
DOI：
10.1007/s00300-020-02632-3
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发表时间：
2020
期刊：
影响因子：
1.7
通讯作者：
Grebmeier, Jacqueline M.
中科院分区：
文献类型：
--
作者：
Waga, Hisatomo;Hirawake, Toru;Grebmeier, Jacqueline M.
越来越多的证据表明，太平洋向北极输水的增加会影响海洋生态系统。对以这种环境变化为特征的未来北极的理论预测之一是，亚北极类群将向北扩张，入侵北极本土生态系统。这项研究的重点是大型动物群落组成的变化，以及在太平洋北极已知的海底热点地区变化的物理驱动因素的影响。在圣劳伦斯岛以南和奇里科夫盆地，大型动物科级分类群的平均数量显著增加，而在2000-2013年期间，楚科奇海东南部的大型动物分类群数量没有明显的趋势。然而，基于丰度的Shannon-Weaver多样性指数没有反映大型动物类群数量的这些区域变化，表明新出现的类群的丰度与已经存在的全部丰度相比微不足道。我们还研究了经向海平面梯度和局地风的时间变化，它们分别贡献了白令海峡北上流量变化的2/3和1/3。经向海平面梯度和当地风有显著增加的趋势，表明海底热点地区向北输送的海水容量的增加可能有助于亚北极类群向北极北部地区的扩张。我们的数据表明，随着向北进入太平洋北极地区的海流增加，大型动物类群类型增加，这可能对该地区未来底栖生态系统的重建产生强烈影响。
There is growing evidence that increased Pacific water transport into the Arctic affects the marine ecosystem. One of the theoretical predictions for a future Arctic characterized by such environmental change is that subarctic taxa will expand northward and invade the native Arctic ecosystem. This study focuses on variation in macrofaunal community composition and the influence of changing physical drivers at known benthic hotspots in the Pacific Arctic. The average number of macrofaunal family-level taxa has increased significantly south of St. Lawrence Island and in the Chirikov Basin, whereas the number of macrofaunal taxa in the southeastern Chukchi Sea showed no significant trend over the 2000–2013 time period. However, the Shannon–Weaver diversity index, based on abundance, did not mirror these regional changes in the number of macrofaunal taxa, indicating that the abundance of newly present taxa was negligible compared to the entire abundance already present. We also investigated temporal variations in meridional sea level gradient and local winds, which contribute 2/3 and 1/3 of the variation in northward volume transport at Bering Strait, respectively. There were significant increasing trends in the meridional sea level gradient and local winds, suggesting the increased northward seawater volume transports over the benthic hotspots could contribute to the expansion of subarctic taxa into these northern Arctic regions. Our data suggest an increase in macrofaunal taxa type with increasing current transport northward into the Pacific Arctic region that could have a strong influence in restructuring the benthic ecosystem in this region in the future.
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DOI：
10.1016/j.dsr2.2018.06.010
发表时间：
2019-04
期刊：
Deep Sea Research Part II: Topical Studies in Oceanography
影响因子：
--
作者：
K. E. Giesbrecht;D. Varela;J. Wiktor;J. Grebmeier;B. Kelly;J. Long
通讯作者：
K. E. Giesbrecht;D. Varela;J. Wiktor;J. Grebmeier;B. Kelly;J. Long
影响因子：
1.2
作者：
Moore, Sue E.;Grebmeier, Jacqueline M.
通讯作者：
Grebmeier, Jacqueline M.
DOI：
10.1016/j.dsr2.2018.10.008
发表时间：
2019-04
期刊：
Deep Sea Research Part II: Topical Studies in Oceanography
影响因子：
--
作者：
Hisatomo Waga;T. Hirawake;A. Fujiwara;J. Grebmeier;S. Saitoh
通讯作者：
Hisatomo Waga;T. Hirawake;A. Fujiwara;J. Grebmeier;S. Saitoh
DOI：
10.1016/j.dsr2.2018.10.007
发表时间：
2019-04-01
影响因子：
3
作者：
Goethel, Christina L.;Grebmeier, Jacqueline M.;Cooper, Lee W.
通讯作者：
Cooper, Lee W.
影响因子：
5.2
作者：
S. Danielson;K. Hedstrom;K. Aagaard;T. Weingartner;E. Curchitser
通讯作者：
E. Curchitser