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首页> 外文期刊>Marine ecology progress series >Spatial variation in size and density of adult and post-settlement Semibalanus balanoides: effects of oceanographic and local conditions
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Spatial variation in size and density of adult and post-settlement Semibalanus balanoides: effects of oceanographic and local conditions

机译：成年和结算后Semibalanus balanoides的大小和密度的空间变化：海洋学和当地条件的影响

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摘要

Regional oceanographic processes are emerging as strong influences on growth and recruitment of intertidal species, with important consequences for populations. Yet local conditions such as wave exposure are also important. To disentangle these effects for the intertidal barnacle Semibalanus balanoides, we surveyed 259 sites around Scotland in July and August over 6 yr (from 2001 to 2006). Scaled digital photographs at 3 shore levels gave sizes and densities of juvenile and adult barnacles for comparison with wave fetch, remotely sensed chlorophyll a (chl a) concentration and seasonal sea surface temperature (SST). Patterns were also compared with site 'openness': the area of connected open sea < 30 km away. Patterns at the 3 shore levels were similar. Hierarchical partitioning (HP) showed that survey year had the biggest effect and improved the predictive power of other variables: wave fetch for adult and juvenile densities, chl a for juvenile size and openness for adult size. SST had little effect. Regression models selected using information theoretic measures included positive effects of chl a, varying among surveys, on average size of barnacles (R~2 from 0.5 to 0.6), and larger high shore barnacles in greater wave exposure. Population densities of adults and juveniles increased with wave fetch, with chl a only influencing density at high shore levels (R~2 from 0.1 to 0.4). Despite temporal and spatial variation in responses to chl a and wave fetch among surveys, relationships were consistent with growth and size in S. balanoides being limited by food supply, and increased recruitment and adult densities in increased wave exposure. Large-scale ecological patterns in this rocky intertidal species thus result from large-scale oceanographic effects on food concentration with habitat-scale wave-mediated effects on supply of food and larvae.
机译：区域海洋学过程正在对潮间带物种的生长和募集产生强烈影响，对人口产生重要影响。然而，诸如波浪暴露的局部条件也很重要。为了消除潮间带藤本植物Semibalanus balanoides的这些影响，我们在6年（2001年至2006年）的7月和8月对苏格兰周围的259个地点进行了调查。在3个海岸水平上按比例缩放的数码照片给出了幼年和成年藤壶的大小和密度，以便与海浪获取，遥感叶绿素a（chla）浓度和季节性海表温度（SST）进行比较。模式也与站点“开放性”进行了比较：相距30公里以内的相连公海区域。 3个岸平面的模式相似。分层划分（HP）显示，调查年份的影响最大，并提高了其他变量的预测能力：成人和青少年密度的波浪获取，青少年尺寸的chl a和成人尺寸的开放度。 SST影响不大。使用信息理论方法选择的回归模型包括chl a的正面影响（在调查中有所不同）对藤壶的平均大小（R〜2从0.5到0.6）以及较大的高岸藤壶在更大的波浪照射下。成年和未成年人的种群密度随海浪的获取而增加，而仅在高海岸水平（R〜2从0.1到0.4）影响密度。尽管在调查中对chl a和波浪获取的响应在时间和空间上有所变化，但关系仍与巴拉乃尼沙门氏菌的生长和大小受到食物供应的限制，以及增加的接触和成年人密度增加的波浪接触有关。因此，这种岩石潮间带物种的大规模生态模式是由于海洋学对食物浓度的影响以及栖息地尺度的波介导对食物和幼体供应的影响。

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  • 来源
    《Marine ecology progress series》 |2010年第398期|207-219|共13页
  • 作者

    M. T. Burrows; S. R. Jenkins; L. Robb; R. Harvey;

  • 作者单位

    Department of Ecology, Scottish Association for Marine Science, Scottish Marine Institute, Oban, Argyll, PA37 1QA, UK;

    School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, LL59 SAB, UK;

    rnDepartment of Ecology, Scottish Association for Marine Science, Scottish Marine Institute, Oban, Argyll, PA37 1QA, UK;

    rnDepartment of Ecology, Scottish Association for Marine Science, Scottish Marine Institute, Oban, Argyll, PA37 1QA, UK;

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  • 正文语种 eng
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  • 关键词

    phytoplankton; wave exposure; growth; recruitment; semibalanus balanoides;

    机译：浮游植物波暴露增长招聘;半b;

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