Composition, density and specimen sizes of pelagic polychaete assemblages were analyzed in the Southern Adriatic Sea. The study was based on finely stratified vertical (0-1100 m) and spatial sampling (17 stations) representing spring conditions. Holoplanktonic polychaetes were distributed in both neritic and pelagic waters, although the highest densities were observed along the Otranto Channel. Analysis of the size frequency distribution revealed a trend with depth only for some species. Spatial distribution of holoplanktonic polychaete density was not related to bottom depth, being the organisms mainly concentrated in the epipelagic layer (0-100 m). The most abundant species showed maximum values below or within the thermocline and within the Deep Chlorophyll Maximum or just above it. Relations between polychaete presence and the underlying oceanographic mechanisms regulating the circulation in the Otranto Channel were discussed. The presence of several non-determined polychaete larvae (e.g. Syllidae) in the pelagic waters at 800-1100 m depths suggests the importance of the role of Levantine waters as main actual and potential carrier of species in the area, though a relevant contribution comes also from North Adriatic dense waters through deep spilling and cascading in the Southern Adriatic pit. These findings increase the knowledge on holoplanktonic polychaetes ecology within the South Adriatic Sea, and represent significant data in the monitoring of changes in biodiversity.

译文

:在亚得里亚海南部分析了远洋多毛鱼类组合的组成,密度和标本大小。该研究基于精细分层的垂直(0-1100μm)和代表春季条件的空间采样(17个站)。尽管在奥特朗托海峡沿岸观察到最高密度,但在浮游和上层水域中都分布有全浮游多毛类。对大小频率分布的分析揭示了仅某些物种具有深度的趋势。整体浮游多毛鱼类密度的空间分布与海底深度无关,因为其生物主要集中在上层(0-100μm)。最丰富的物种在热跃线以下或之内以及在深叶绿素最大值之内或刚好在其之上显示最大值。讨论了多壳类动物的存在与调节Otranto海峡环流的潜在海洋学机制之间的关系。在上层水域深度为800-1100 m的水中存在几个未定的多壳幼体(例如西丽科),这表明黎凡特水作为该地区物种的主要实际和潜在载体的作用很重要,尽管也做出了相关贡献从北亚得里亚海的稠密水域经过南亚得里亚海的深坑溢流和级联。这些发现增加了对南亚得里亚海内整体浮游多毛类生态学的了解,并代表了监测生物多样性变化的重要数据。

+1
+2
100研值 100研值 ¥99课程
检索文献一次
下载文献一次

去下载>

成功解锁2个技能,为你点赞

《SCI写作十大必备语法》
解决你的SCI语法难题!

技能熟练度+1

视频课《玩转文献检索》
让你成为检索达人!

恭喜完成新手挑战

手机微信扫一扫,添加好友领取

免费领《Endnote文献管理工具+教程》

微信扫码, 免费领取

手机登录

获取验证码
登录