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首页> 外文期刊>ICES Journal of Marine Science >Comparison of mechanical disturbance in soft sediments due to tickler-chain SumWing trawl vs. electro-fitted PulseWing trawl
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Comparison of mechanical disturbance in soft sediments due to tickler-chain SumWing trawl vs. electro-fitted PulseWing trawl

机译：挠性链式SumWing拖网与电安装的PulseWing拖网导致的软沉积物中的机械扰动比较

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摘要

Tickler-chain SumWing and electrode-fitted PulseWing trawls were compared to assess seabed impacts. Multi-beam echo sounder (MBES) bathymetry confirmed that the SumWing trawl tracks were consistently and uniformly deepened to 1.5 cm depth in contrast to 0.7 cm following PulseWing trawling. MBES backscatter strength analysis showed that SumWing trawls (3.11 dB) flattened seabed roughness significantly more than PulseWing trawls (2.37 dB). Sediment Profile Imagery (SPI) showed that SumWing trawls (mean, SD) homogenised the sediment deeper (3.4 cm, 0.9 cm) and removed more of the oxidised layer than PulseWing trawls (1 cm, 0.8 cm). The reduced PulseWing trawling impacts allowed a faster re-establishment of the oxidised layer and micro-topography. Particle size analysis suggested that SumWing trawls injected finer particles into the deeper sediment layers (approximate to 4 cm depth), while PulseWing trawling only caused coarsening of the top layers (winnowing effect). Total penetration depth (mean, SD) of the SumWing trawls (4.1 cm, 0.9 cm) and PulseWing trawls (1.8 cm, 0.8 cm) was estimated by the depth of the disturbance layer and the layer of mobilized sediment (SumWing = 0.7 cm; PulseWing trawl = 0.8 cm). PulseWing trawls reduced most of the mechanical seabed impacts compared to SumWing trawls for this substrate and area characteristics.
机译：比较了Tickler链SumWing和带电极的PulseWing拖网，以评估海床的影响。多波束回声测深仪（MBES）测深仪证实，SumWing拖网轨道被一致且均匀地加深到1.5 cm深度，而PulseWing拖网之后则为0.7 cm。 MBES背向散射强度分析表明，SumWing拖网（3.11 dB）使海底粗糙度变平，明显大于PulseWing拖网（2.37 dB）。泥沙剖面图像（SPI）显示，SumWing拖网（均值，SD）比PulseWing拖网（1 cm，0.8 cm）更深（3.4 cm，0.9 cm）使沉积物更均匀，并去除了更多的氧化层。减少的PulseWing拖网拖曳影响可以更快地重建氧化层和微形貌。粒度分析表明，SumWing拖网将更细的颗粒注入了较深的沉积层（约4 cm深），而PulseWing拖网仅导致顶层变粗（风选效应）。 SumWing拖网（4.1 cm，0.9 cm）和PulseWing拖网（1.8 cm，0.8 cm）的总穿透深度（平均值，SD）通过扰动层和动员沉积物层的深度估算（SumWing = 0.7 cm; PulseWing拖网= 0.8厘米）。与SumWing拖网相比，PulseWing拖网减少了大多数机械海底冲击，因为该底材和区域特性如此。

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  • 来源
    《ICES Journal of Marine Science》 |2019年第1期|312-329|共18页
  • 作者

    Depestele Jochen; Degrendele Koen; Esmaeili Moosa; Ivanovic Ana; Kroger Silke; ONeill Finbarr G.; Parker Ruth; Polet Hans; Roche Marc; Teal Lorna R.; Vanelslander Bart; Rijnsdorp Adriaan D.;

  • 作者单位

    Flanders Res Inst Agr Fisheries & Food ILVO, Fisheries Res Grp, Ankerstr 1, B-8400 Oostende, Belgium;

    Fed Publ Serv Econ, Energy Continental Shelf, North Gate 4B26,Koning Albert II Laan 16, B-1000 Brussels, Belgium;

    Univ Aberdeen, Sch Engn, Fraser Noble Bldg, Aberdeen AB24 3UE, Scotland;

    Univ Aberdeen, Sch Engn, Fraser Noble Bldg, Aberdeen AB24 3UE, Scotland;

    Ctr Environm Fisheries & Aquaculture Sci Cefas, Lowestoft Lab, Pakefield Rd, Lowestoft NR33 0HT, Suffolk, England;

    Tech Univ Denmark, Natl Inst Aquat Resources DTU AQUA, Willemoesvej 2, DK-9850 Hirtshals, Denmark;

    Ctr Environm Fisheries & Aquaculture Sci Cefas, Lowestoft Lab, Pakefield Rd, Lowestoft NR33 0HT, Suffolk, England;

    Flanders Res Inst Agr Fisheries & Food ILVO, Fisheries Res Grp, Ankerstr 1, B-8400 Oostende, Belgium;

    Fed Publ Serv Econ, Energy Continental Shelf, North Gate 4B26,Koning Albert II Laan 16, B-1000 Brussels, Belgium;

    Wageningen UR, Wageningen Marine Res, POB 68, NL-1970 AB Ijmuiden, Netherlands;

    Flanders Res Inst Agr Fisheries & Food ILVO, Fisheries Res Grp, Ankerstr 1, B-8400 Oostende, Belgium;

    Wageningen UR, Wageningen Marine Res, POB 68, NL-1970 AB Ijmuiden, Netherlands;

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  • 关键词

    beam trawl; biogeochemistry; habitat impacts; particle size distribution; penetration depth; pulse trawl; seafloor integrity; sediment resuspension;

    机译：束拖网;生物地球化学;栖息地撞击;粒径分布;穿透深度;脉冲拖网;海底完整性;沉积物悬浮;

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