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首页> 外文期刊>Estuarine Coastal and Shelf Science >Salinity disturbance affects faunal community composition and organic matter on a restored Crassostrea virginica oyster reef
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Salinity disturbance affects faunal community composition and organic matter on a restored Crassostrea virginica oyster reef

机译：盐度干扰会影响粪便群落的成分和有机物在恢复的鲫鱼牡蛎礁

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摘要

Ecological restoration has become a widely recognized tool to ameliorate the effects of habitat loss. Half Moon Reef, once a highly-productive 2 km(2) Crassostrea virginica oyster reef in Matagorda Bay, Texas, was harvested to depletion in the early 20th century. In 2014, a 0.23 km(2) reef complex was created using limestone and concrete substrates to restore oyster populations-one of the largest contiguous oyster reef restoration efforts in the U.S. In the three years post-construction, two large freshwater inflow events provided a unique opportunity to determine the effects of prolonged salinity reductions ( 10) on oyster reef faunal community composition and organic matter quality. Oyster size generally increased over the 3-year study period, enhancing habitat provision for reef fauna. Reef-resident and reef-associated species metrics (abundance, biomass, diversity, and species richness) were positively correlated with salinity. Following a large salinity reduction (from similar to 26 to similar to 9) one year post-construction, the reef-resident faunal community shifted from dominance by small gastropods to larger and more resilient crustaceans. A second, lower magnitude salinity reduction two years post-construction did not elicit the same biotic response. Reef-associated fauna showed no patterns related to distance from the reef (13 m vs. 150 m), indicating limited influence of the restored oyster reef on fauna outside of the physical reef structure. Salinity decreases were associated with C-13-depletion of suspended particulate organic matter, whereas no change in isotopic composition was observed for surface sediment organic matter. Carbon/chlorophyll a and carbonitrogen ratios of suspended particulate organic matter indicate the quality of organic matter was higher following low salinity events, likely due to increased autochthonous production facilitated by pulses of freshwater inflow. Oysters assimilated nearly equal proportions of surface sediment organic matter and suspended particulate organic matter. It is important to understand the effects of salinity variability for the effective management of coastal restoration projects because freshwater inflow has a major influence on coastal ecosystems.
机译：生态恢复已成为一种广泛认可的工具来改善栖息地损失的影响。曾经是德克萨斯州马塔尔达湾的高度富有成效的2公里（2）克斯索斯特雷·奥斯特·珊瑚礁，在20世纪初收获耗尽耗尽率。 2014年，使用石灰石和混凝土基板创建了0.23公里的珊瑚礁综合体，以恢复牡蛎种群 - 在建造后三年美国最大的连续牡蛎礁恢复努力之一，提供了两个大型淡水流入事件独特的机会，确定延长盐度减少（<10）对牡蛎礁群落组成和有机物质质量的影响。牡蛎大小一般在3年的研究期间增加，加强了礁石动物的栖息地规定。 Reef-Resident和Reef相关的物种度量（丰富，生物量，多样性和物种丰富性）与盐度正相关。在建设后一年的大盐度减少（从类似于26〜类似于9）时，珊瑚礁驻地群社区从小型胃脂群中转向更大，更具弹性的甲壳类动物。第二次，较低幅度盐度减少两年后施工后不引出相同的生物反应。珊瑚礁相关的动物没有与珊瑚礁（13米与150米）的距离有关的模式，表明恢复的牡蛎礁对物理礁结构之外的固定牡蛎礁的有限影响。盐度降低与悬浮的颗粒有机物的C-13耗竭有关，而观察到表面沉积物有机物质没有同位素组合物的变化。悬浮颗粒状有机物质的碳/叶绿素A和碳/氮比表明，在低盐度事件的情况下，有机物质的质量较高，这可能由于淡水流入脉冲伴随着增加的自加起来的制作而导致。牡蛎同化了几乎等于表面沉积物有机物质和悬浮颗粒的有机物的比例。重要的是要了解盐度可变性对沿海修复项目的有效管理的影响，因为淡水流入对沿海生态系统产生了重大影响。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2019年第15期|106267.1-106267.13|共13页
  • 作者

    Marshall Danielle Aguilar; Lebreton Benoit; Palmer Terence; De Santiago Kevin; Pollack Jennifer Beseres;

  • 作者单位

    Texas A&M Univ Corpus Christi Dept Life Sci 6300 Ocean Dr Unit 5860 Corpus Christi TX 78412 USA|Louisiana State Univ Sch Renewable Nat Resources Agr Ctr Baton Rouge LA 70803 USA;

    Univ La Rochelle CNRS UMR Littoral Environm & Soc Inst Littoral & Environm 2 Rue Olympe Gouges F-17000 La Rochelle France;

    Texas A&M Univ Corpus Christi Dept Life Sci 6300 Ocean Dr Unit 5860 Corpus Christi TX 78412 USA|Texas A&M Univ Corpus Christi Harte Res Inst Gulf Mexico Studies 6300 Ocean Dr Unit 5869 Corpus Christi TX 78412 USA;

    Texas A&M Univ Corpus Christi Dept Life Sci 6300 Ocean Dr Unit 5860 Corpus Christi TX 78412 USA|Lake Pontchartrain Basin Fdn 8001 Lakeshore Dr New Orleans LA 70124 USA;

    Texas A&M Univ Corpus Christi Dept Life Sci 6300 Ocean Dr Unit 5860 Corpus Christi TX 78412 USA|Texas A&M Univ Corpus Christi Harte Res Inst Gulf Mexico Studies 6300 Ocean Dr Unit 5869 Corpus Christi TX 78412 USA;

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  • 正文语种 eng
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  • 关键词

    Estuary; Food web; Freshwater inflow; Gulf of Mexico; Habitat restoration; Stable isotopes;

    机译：河口;食物网;淡水流入;墨西哥湾;栖息地恢复;稳定同位素;

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