Yearly comparison of the planktonic chaetognath community in the Chukchi Sea in the summers of 1991 and 2007
Yearly comparison of the planktonic chaetognath community in the Chukchi Sea in the summers of 1991 and 2007
复制标题
1991年和2007年夏季楚科奇海浮游毛颌动物群落的年度比较
DOI：
10.1016/j.polar.2018.11.011
复制
发表时间：
2019
期刊：
影响因子：
1.8
通讯作者：
Yamaguchi Atsushi
中科院分区：
文献类型：
--
作者：
Amano Karen;Abe Yoshiyuki;Matsuno Kohei;Yamaguchi Atsushi
在全球海洋中，毛颚类是第二大浮游动物类群，在食草动物和高等营养生物之间具有重要的转移作用。尽管毛颚类很重要，但人们对它们在楚科奇海的生态知之甚少，楚科奇海最近的冰减少在北冰洋很突出。比较了1991年至2007年期间的毛颚类丰度、生物量、群落结构（总长度和性腺成熟度）和摄食影响。在毛颚类群落中，以优雅副箭虫（Parasagitta elegans）为优势种，钩虫（Eukrohnia hamata）仅在2007年出现在南部地区。毛颚类丰度、生物量、总长度和性腺成熟度存在年度差异。所有这些参数在1991年都比2007年更大、更先进。最突出的年度差异是在水平分布的毛颚类，主要是在北方地区在1991年和2007年的南部地区。2007年观察到的南方毛颚类种群被认为是由太平洋水通过白令海峡运输的。由于1991年楚科奇海和2007年白令海的原始种群存在差异，这两年的差异可能是地区差异造成的。随着北极变暖，与本研究中的2007年相似的水平分布模式将更加明显。
In oceans worldwide, chaetognaths are the second most dominant zooplankton taxa and have vital transfer roles between herbivores and higher trophic organisms. Despite the chaetognaths’ importance, little is known regarding their ecology in the Chukchi Sea, where recent ice reduction is prominent in the Arctic Ocean. We made comparisons of the chaetognath abundance, biomass, community structure (total length and gonadal maturation) and feeding impacts between the years 1991 and 2007. Within the chaetognath community,Parasagitta eleganswas the abundant species, andEukrohnia hamataonly occurred in the southern region in 2007. Yearly differences were detected in chaetognath abundance, biomass, total length and gonadal maturation. All of these parameters were greater and more advanced in 1991 than in 2007. The most prominent yearly differences were in the horizontal distributions of chaetognaths, primarily in the northern region in 1991 and the southern region in 2007. The southern chaetognath populations observed in 2007 were considered to be transported by the Pacific water through the Bering Strait. Because of the differences in the original populations between the Chukchi Sea in 1991 and the Bering Sea in 2007, differences in these two years may be due to regional differences. As the Arctic warms, the horizontal distribution pattern, similar with 2007 in this study, will be more pronounced.