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首页> 外文期刊>Polar biology >The temporal variability of the macrofauna at the deep-sea observatory HAUSGARTEN (Fram Strait, Arctic Ocean)
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The temporal variability of the macrofauna at the deep-sea observatory HAUSGARTEN (Fram Strait, Arctic Ocean)

机译：深海天文台豪斯加滕（北冰洋弗拉姆海峡）大型动物的时间变化

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摘要

Regular biological observations of the deep sea bottom fauna are very important for understanding the role benthic biota plays in ocean ecosystems. Temporal variability in macrobenthos structure is usually studied in terms of general community characteristics including density, biomass and diversity. In this investigation, we also focused on the species composition and their individual characteristics in terms of temporal dynamics. The deep-sea macrofauna was studied based on the material collected in the Eastern Fram Strait during two expeditions in July-August 2003 and July 2012. Stations were taken at depths of about 2500 m at the deep-sea observatory using the USNEL box corer (0.25 m(2)). Three stations at varying distances were sampled in 2003 (three cores per station). In 2012, the same stations were resampled with an additional station taken close to the central HAUSGARTEN permanent sampling site (one core per station). No significant changes in the total density and biomass were found between the two sampling events. However, the density of several common species has changed significantly (e.g. densities of Mendicula ockelmanni and Chaetozone cf. jubata have increased). Four species out of total 64 were unique for the 2003 samples, while six species out of 52 were unique for 2012 samples. The absence of several particular species in the samples from the different years is estimated to be not random: the number of samples required to find these species was less than the number of samples collected. The differences in time between the very same stations exceeded the inner spatial heterogeneity of each of the three stations. However, the spatial heterogeneity within the scale of 20-25 km exceeded the temporal differences.
机译：定期对深海海底动物进行生物学观察对于了解底栖生物在海洋生态系统中的作用非常重要。通常根据包括密度，生物量和多样性在内的总体群落特征研究大型底栖动物的时间变异性。在这项调查中，我们还关注了物种组成及其在时间动态方面的个体特征。根据2003年7月至8月和2012年7月两次远征中在东部弗拉姆海峡收集的材料对深海大型动物群进行了研究。使用USNEL盒式取芯器在深海天文台拍摄了约2500 m的深度站（ 0.25 m（2））。 2003年对三个距离不同的站点进行了采样（每个站点三个核心）。 2012年，对这些站点进行了重新采样，并在靠近HAUSGARTEN中央永久采样站点（每个站点一个核心）的位置增加了一个站点。在两次采样之间未发现总密度和生物量的显着变化。但是，几种常见物种的密度已发生了显着变化（例如，曼地拉克曼克蒂曼（Medicula ockelmanni）和查特宗（Chaetozone）比尤巴塔的密度有所增加）。 2003年的样本中共有64种中的4种是唯一的，而2012年的样本中有52种中的6种是唯一的。估计来自不同年份的样本中没有几种特定的物种并不是随机的：发现这些物种所需的样本数量少于收集的样本数量。同一站点之间的时间差超过了三个站点中每个站点的内部空间异质性。但是，在20-25 km范围内的空间异质性超过了时间差异。

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  • 来源
    《Polar biology》 |2019年第3期|527-540|共14页
  • 作者

    Vedenin A.; Mokievsky V.; Soltwedel T.; Budaeva N.;

  • 作者单位

    Russian Acad Sci, PP Shirshov Inst Oceanol, Nakhimovsky Pr 36, Moscow 117997, Russia;

    Russian Acad Sci, PP Shirshov Inst Oceanol, Nakhimovsky Pr 36, Moscow 117997, Russia;

    Helmholtz Zentrum Polar & Meeresforsch, Alfred Wegener Inst, Handelshafen 12, D-27570 Bremerhaven, Germany;

    Russian Acad Sci, PP Shirshov Inst Oceanol, Nakhimovsky Pr 36, Moscow 117997, Russia|Univ Bergen, Univ Museum Bergen, Dept Nat Hist, POB 7800, N-5020 Bergen, Norway;

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  • 正文语种 eng
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  • 关键词

    Arctic; Benthic communities; Fram Strait; Deep Sea; Temporal variability;

    机译：北极;底栖社区;弗拉姆海峡;深海;时间变异性;

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