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首页> 外文期刊>ICES Journal of Marine Science >Spatio-temporal models reveal subtle changes to demersal communities following the Exxon Valdez oil spill
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Spatio-temporal models reveal subtle changes to demersal communities following the Exxon Valdez oil spill

机译：时空模型揭示了埃克森·瓦尔迪兹（Exxon Valdez）漏油事件后海底社区的微妙变化

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摘要

Toxic pollutants such as crude oil have direct negative effects for a wide array of marine life. While mortality from acute exposure to oil is obvious, sub-lethal consequences of exposure to petroleum derivatives for growth and reproduction are less evident and sub-lethal effects in fish populations are obscured by natural environmental variation, fishing, and measurement error. We use fisheries independent surveys in the Gulf of Alaska to examine the consequences of the 1989 Exxon Valdez oil spill (EVOS) for demersal fish. We delineate areas across a range of exposure to EVOS and use spatio-temporal models to quantify the abundance of 53 species-groups over 31 years. We compare multiple community metrics for demersal fish in EVOS and Control areas. We find that areas more exposed to EVOS have more negative trends in total groundfish biomass than non-EVOS areas, and that this change is driven primarily by reductions in the abundance of the apex predator guild. We show no signature of increased variability or increased levels of synchrony within EVOS areas. Our analysis supports mild consequences of EVOS for groundfish communities, but suggests that long time-series and assessments of changes at the community level may reveal sub-lethal effects in marine communities.
机译：诸如原油之类的有毒污染物对各种海洋生物都有直接的负面影响。虽然急性暴露于石油的死亡率是显而易见的，但暴露于石油衍生物以促进生长和繁殖的亚致死后果却不那么明显，自然环境变化，捕捞和测量误差也掩盖了对鱼类种群的亚致死效应。我们使用阿拉斯加湾的渔业独立调查来研究1989年埃克森·瓦尔迪兹溢油（EVOS）对沉鱼的后果。我们划定了暴露在EVOS范围内的区域，并使用时空模型来量化31年中53个物种群体的丰度。我们比较了EVOS和控制区域中沉鱼的多个社区指标。我们发现，与非EVOS区域相比，暴露于EVOS区域的底栖鱼类总生物量具有更大的负向趋势，并且这种变化主要是由先端捕食者协会数量的减少引起的。我们没有显示出在EVOS区域内增加变异性或同步水平的迹象。我们的分析支持EVOS对底层鱼类群落造成的轻微后果，但表明长期的时间序列和对群落水平变化的评估可能揭示了海洋群落中的亚致死作用。

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  • 来源
    《ICES Journal of Marine Science》 |2018年第1期|287-297|共11页
  • 作者

    Shelton Andrew O.; Hunsicker Mary E.; Ward Eric J.; Feist Blake E.; Blake Rachael; Ward Colette L.; Williams Benjamin C.; Duffy-Anderson Janet T.; Hollowed Anne B.; Haynie Alan C.;

  • 作者单位

    NOAA, Conservat Biol Div, Northwest Fisheries Sci Ctr, Natl Marine Fisheries Serv, 2725 Montlake Blvd E, Seattle, WA 98112 USA;

    NOAA, Fish Ecol Div, Northwest Fisheries Sci Ctr, Natl Marine Fisheries Serv, 2032 SE OSU Dr, Newport, OR 97365 USA;

    NOAA, Conservat Biol Div, Northwest Fisheries Sci Ctr, Natl Marine Fisheries Serv, 2725 Montlake Blvd E, Seattle, WA 98112 USA;

    NOAA, Conservat Biol Div, Northwest Fisheries Sci Ctr, Natl Marine Fisheries Serv, 2725 Montlake Blvd E, Seattle, WA 98112 USA;

    Univ Calif Santa Barbara, Natl Ctr Ecol Anal & Synth, 735 State St Suite 300, Santa Barbara, CA 93101 USA;

    Univ Calif Santa Barbara, Natl Ctr Ecol Anal & Synth, 735 State St Suite 300, Santa Barbara, CA 93101 USA;

    Univ Alaska Fairbanks, Coll Fisheries & Ocean Sci, 17101 Point Lena Loop Rd, Juneau, AK 99801 USA;

    NOAA, Resource Assessment & Conservat Engn Div, Alaska Fisheries Sci Ctr, Natl Marine Fisheries Serv, 7600 Sand Point Way NE, Seattle, WA 98115 USA;

    NOAA, Resource Ecol & Fisheries Management Div, Alaska Fisheries Sci Ctr, Natl Marine Fisheries Serv, 7600 Sand Point Way NE, Seattle, WA 98115 USA;

    NOAA, Resource Ecol & Fisheries Management Div, Alaska Fisheries Sci Ctr, Natl Marine Fisheries Serv, 7600 Sand Point Way NE, Seattle, WA 98115 USA;

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  • 关键词

    Exxon Valdez; groundfish; spatio-temporal models; community analysis;

    机译：埃克森·瓦尔迪兹（Exxon Valdez）底层鱼类时空模型社区分析;

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