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首页> 外文期刊>Marine biology >Spatiotemporal variations in rocky intertidal malacofauna throughout Japan in the 1970s and 1980s
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Spatiotemporal variations in rocky intertidal malacofauna throughout Japan in the 1970s and 1980s

机译：1970年代和1980年代全日本的岩质潮间带马拉科动物的时空变化

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摘要

Spatial and temporal variations of benthic fauna over a wide region (> 1,000 km) that includes complex ocean currents have seldom been quantitatively studied. The present study revealed malacofaunal variations on Japanese rocky shores affected by the Soya, Tsushima, Oyashio, and Kuroshio currents, and in the Inland Sea. On 29 shores in seven regions in these sea areas, previous researchers have recorded the number of molluscs in quadrats in spring and summer of 1978 and 1984-1986. Reanalyses of these records revealed the following patterns. (1) Shore-to-shore variation in malacofauna was correlated with shore-to-shore geographical distance less clearly for more southern regions. This might show that in southern regions many taxa with low relative abundance are haphazardly recorded on some shores and blur the effect of shore-to-shore distance on malacofaunal dissimilarity. (2) Region-to-region variation in malacofauna was significantly correlated with region-to-region geographical distance. This suggests the influences of environments and paleontological events specific to each current surrounding each region. (3) The pattern of dissimilarity between the Inland Sea and the other sea areas greatly changed from the 1970s to 1980s. This was due in part to the following density fluctuations on some shores in the Inland Sea: increases in the non-indigenous mussel Mytilus galloprovincialis, cultured oyster Crassostrea gigas, and littorinid Littorina brevicula reportedly abundant in sheltered areas; and decreases in the littorinid Nodilittorina radiata reportedly abundant in exposed areas and muricid gastropods Thais spp. showing imposex. This suggests an increase of anthropogenic perturbations during the study period in the Inland Sea which is surrounded by large cities and ports.
机译：很少对包括复杂洋流在内的宽阔区域（> 1,000 km）底栖动物的时空变化进行定量研究。本研究揭示了在受到大豆，对马，大潮和黑潮的影响的日本多岩石海岸以及内陆海域的甲流。在这些海域七个区域的29个海岸上，先前的研究人员已经记录了1978年春夏季和1984-1986年四方类动物的软体动物数量。对这些记录的重新分析显示出以下模式。 （1）在南部地区，疟疾动物的岸到岸变化与岸到地理距离的相关性不太明显。这可能表明，在南部地区，一些沿海地区偶然记录了许多相对丰度较低的分类单元，并且模糊了岸对岸距离对乳腺植物相异性的影响。 （2）马拉科动物的区域间差异与区域间地理距离显着相关。这表明环境和古生物学事件对每个区域周围每个特定电流的影响。 （3）内陆海域与其他海域之间的差异模式从1970年代到1980年代发生了巨大变化。这部分是由于内海一些海岸的以下密度波动造成的：据报道，在庇护区内非本地贻贝贻贝Mytilus galloprovincialis，养殖牡蛎Crassostrea gigas以及沿海滨tor Littorina brevicula数量增加。据报道，在裸露的地区和鼠类腹足类动物Thais spp中，丰富的littorinid Nodilittorina radiata有所减少。显示强加。这表明在研究期间，被大城市和港口包围的内陆海域的人为扰动有所增加。

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  • 来源
    《Marine biology》 |2007年第1期|p.61-70|共10页
  • 作者

    Takeo Kurihara;

  • 作者单位

    Ishigaki Tropical Station, Seikai National Fisheries Research Institute, Ishigaki Island, Okinawa 907-0451, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境生物学;
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