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首页> 外文期刊>Polar biology >MicroNESS: an innovative opening-closing multinet for under pack-ice zooplankton sampling
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MicroNESS: an innovative opening-closing multinet for under pack-ice zooplankton sampling

机译：MicroNESS：一种用于浮冰下浮游动物采样的创新的开-关多网

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摘要

Quantitative sampling of zooplankton communities from ice-covered waters presents many technical and logistic difficulties. Currently available techniques enable only vertical tows through relatively small ice holes, and the filtered volumes are generally low. For these reasons, we developed and tested Micro-Net Environmental Sampling System (MicroNESS), an innovative small-sized opening-closing multinet device carried by a ROV for horizontal and oblique sampling of the under-ice zooplankton community. MicroNESS design ensures a filtration efficiency close to 90 % due to the relevant filtration open area ratio (similar to 4) and exhibited only limited effects of clogging and avoidance for optimal speed of 0.35 ms(-1) and towing duration not longer than 14 min with mean filtered volumes in the order of 11 m(3). MicroNESS was successfully tested in Terra Nova Bay (Antarctica). A total of 96 tows were carried out to sample the zooplankton in the waters below the 2.6-m-thick pack ice, far from the ice hole, at selected depths (3.5, 4.5, 5.0, 6.0, 7.0, 10.0 and 20.0 m). Overall, more than 70,000 specimens were identified, mostly copepod taxa, which showed a size range from the small Stephos longipes nauplius stage I (0.11 mm) to the large adult females of Calanoides acutus (4.8 mm). The comparison among the ice-associated copepod communities collected by MicroNESS and those of three traditional sampling techniques showed that MicroNESS can provide useful insights about changes in composition, biomass and particle size structure of this key plankton component, especially on a short timescale during ice melting.
机译：从冰雪覆盖的水中对浮游动物群落进行定量采样存在许多技术和后勤方面的困难。当前可用的技术仅使垂直的丝束能够通过相对较小的冰孔，并且过滤后的体积通常较小。出于这些原因，我们开发并测试了Micro-Net环境采样系统（MicroNESS），这是一种由ROV携带的创新型小型开合多网设备，可对冰下浮游动物群落进行水平和倾斜采样。由于相关的过滤开口面积比（类似于4），MicroNESS设计可确保过滤效率接近90％，并且仅表现出有限的堵塞和避免效果，最佳速度为0.35 ms（-1），拖曳时间不超过14分钟平均过滤体积为11 m（3）。 MicroNESS已在Terra Nova Bay（南极洲）成功测试。在2.6 m厚的冰块以下，远离冰洞的水域中，在选定的深度（3.5、4.5、5.0、6.0、7.0、10.0和20.0 m）下，共进行了96次拖缆采样，以对浮游动物进行采样。 。总体而言，已鉴定出70,000多个标本，其中大部分为co足类类群，其大小范围从小型Stephos longipes幼虫阶段（0.11毫米）到大型成年雌性Calanoides acutus（4.8毫米）。 MicroNESS收集的与冰相关的pe足类群落与三种传统采样技术的比较表明，MicroNESS可以提供​​关于该关键浮游生物成分的组成，生物量和粒径结构变化的有用见解，尤其是在融冰过程中的短时间内。

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  • 来源
    《Polar biology》 |2015年第12期|2035-2046|共12页
  • 作者

    Guglielmo L.; Arena G.; Brugnano C.; Guglielmo R.; Granata A.; Minutoli R.; Sitran R.; Zagami G.; Bergamasco A.;

  • 作者单位

    CNR, Sect Messina, Inst Coastal Marine Environm IAMC CNR, I-98122 Messina, Italy;

    CNR, Sect Messina, Inst Coastal Marine Environm IAMC CNR, I-98122 Messina, Italy;

    CNR, Sect Messina, Inst Coastal Marine Environm IAMC CNR, I-98122 Messina, Italy;

    Zool Stn Anton Dohrn, Lab Benthos Ecol, I-80077 Naples, Italy;

    CNR, Sect Messina, Inst Coastal Marine Environm IAMC CNR, I-98122 Messina, Italy;

    CNR, Sect Messina, Inst Coastal Marine Environm IAMC CNR, I-98122 Messina, Italy;

    CNR, Sect Messina, Inst Coastal Marine Environm IAMC CNR, I-98122 Messina, Italy;

    CNR, Sect Messina, Inst Coastal Marine Environm IAMC CNR, I-98122 Messina, Italy;

    CNR, Sect Messina, Inst Coastal Marine Environm IAMC CNR, I-98122 Messina, Italy;

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  • 正文语种 eng
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  • 关键词

    Multinet; Pack-ice; Zooplankton; Horizontal sampling; Antarctica;

    机译：Multinet;Pack-ice;Zooplankton;水平采样;南极洲;

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