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首页> 外文期刊>Marine biology >Synergistic Effects Of Ultraviolet Radiation And Conditions At Low Tide On Egg Masses Of Limpets (benhamina Obliquata And Siphonaria Australis) In New Zealand
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Synergistic Effects Of Ultraviolet Radiation And Conditions At Low Tide On Egg Masses Of Limpets (benhamina Obliquata And Siphonaria Australis) In New Zealand

机译：紫外线辐射和低潮条件对新西兰小羽扇豆（benhamina obliquata和南洋槐）卵重的协同效应

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摘要

The effects of ultraviolet radiation (UVR), desiccation and conditions in tidal pools on embryonic survival were examined for two common pulmonate limpets that lay intertidal benthic egg masses on rocky shores in New Zealand: Benhamina obliquata and Siphonaria australis. Field surveys and manipulative experiments were conducted between December 2006 and September 2007 in the Wellington region of New Zealand (41°17'S, 174°47'E). Egg mass deposition sites in the field were species-specific: B. obliquata deposited eggs primarily in shaded crevices, whereas S. australis predominantly deposited egg masses in the sun and in tidal pools. For both species, however, embryonic mortality was greater in egg masses that had been in full sun compared to shade. For S. australis, there was also high mortality in egg masses in tidal pools or desiccated compared to those that remained submerged in flowing seawater at low tide. In outdoor experiments, embryonic mortality was also always greatest for egg masses exposed to full sun, and lowest for those in shaded treatments. Mortality was also higher if egg masses were in simulated tidal pools, and for S. australis, if desiccated, compared to those submerged in flowing seawater. Periods of particularly sunny conditions with high temperatures also resulted in higher overall mortality. Finally, egg masses of both species that were initially deposited in the shade had greater mortality in response to subsequent UV exposure compared to egg masses initially deposited in full sun. Results from this study suggest that the egg masses of these two species are highly vulnerable to UVR, as well as other intertidal stressors. Embryos of both of these species may be at risk of high mortality particularly during summer when extreme conditions of UV intensity and high temperature coincide with low tide cycles.
机译：考察了在新西兰多岩石的海岸上放置潮间带底栖鱼卵的两种常见的肺毛帽贝：紫外线（UVR），潮汐池的干燥和条件对胚胎存活的影响：Benhamina obliquata和南极虹吸管（Siphonaria australis）。在2006年12月至2007年9月之间，在新西兰惠灵顿地区（北纬41°17'，东经174°47'）进行了现场调查和操纵实验。田间卵的质量沉积位点是特定物种的：B。obliquata主要在阴影缝隙中沉积卵，而S. australis主要在阳光和潮汐池中沉积卵块。然而，对于两个物种来说，在阳光充足的情况下，与阴影相比，鸡蛋的胚胎死亡率更高。与低潮时仍浸没在流动海水中的潮汐池相比，南极链球菌在潮池或干燥的卵团中的死亡率也很高。在户外实验中，胚胎的死亡率对于暴露于充足阳光下的卵块也总是最大的，对于阴影处理的卵子的死亡率最低。如果将卵块放在模拟的潮汐池中，那么死亡率也要更高，而如果将南澳大利亚的沙门氏菌干燥，则死亡率要高于淹没在海水中的卵。高温特别晴天的时期也导致更高的总死亡率。最后，与最初在全日照下沉积的卵块相比，最初沉积在阴凉处的两种卵块均具有更高的死亡率，以应对随后的紫外线照射。这项研究的结果表明，这两个物种的卵团以及其他潮间带应激源极易受到紫外线辐射的影响。这两个物种的胚胎都有高死亡率的危险，尤其是在夏天，此时紫外线强度和高温的极端条件与低潮周期相吻合。

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  • 来源
    《Marine biology》 |2009年第4期|p.579-587|共9页
  • 作者

    Janine Russell; Nicole E. Phillips;

  • 作者单位

    School of Biological Sciences and Coastal Ecology Laboratory, Victoria University of Wellington, P.O. Box 600, Wellington, New Zealand;

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  • 正文语种 eng
  • 中图分类 环境生物学;
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