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首页> 外文期刊>Marine ecology progress series >Organic matter release by the dominant primary producers in a Caribbean reef lagoon: implication for in situ O_2 availability
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Organic matter release by the dominant primary producers in a Caribbean reef lagoon: implication for in situ O_2 availability

机译：加勒比礁泻湖中主要初级生产者释放的有机物：对原位O_2可用性的影响

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摘要

Coral reef lagoon benthic primary producers may control various processes important for ecosystem functioning, predominately via the release of organic matter, but comparative data are rare. This study therefore comparatively investigated the quantity of particulate and dissolved organic matter released by different benthic primary producers (seagrasses, macroalgae and sclerac-tinian corals) from the coral reef lagoon of Puerto Morelos, Mexican Caribbean. Microbial degrad-ability of the released organic matter was determined along with diurnal in situ measurements of O_2 concentrations at lagoon sites dominated by different primary producers. Particulate organic carbon (POC) release was highest for corals (8.2 ± 4.2 mg m~(-2) h~(-1)), followed by benthic algae (3.9 ± 0.7 mg m~(-2) h~(-1)) and seagrasses (3.1 ± 2.0 mg m~(-2) h~(-1)). Dissolved organic carbon (DOC) release rates were highest for seagrasses (15.8 ± 6.0 mg m~(-2) h~(-1)), followed by algae (1.9 ± 2.0 mg m~(-2) h~(-1)), whereas corals displayed net DOC uptake. Benthic algae-derived organic matter stimulated planktonic microbial O_2 consumption significantly more than seagrass- or coral-derived organic matter. In situ O_2 loggers revealed significantly lower average O_2 concentrations, particularly during the night, at algae-dominated sites compared to other benthic lagoon environments. This indicates effects of algae-derived organic matter on in situ O_2 availability. We therefore suggest that shifts in benthic primary producer dominance affect ecosystem functioning owing to differences in quantity, composition and microbial degradability of the released organic matter.
机译：珊瑚礁泻湖底栖初级生产者可能主要通过释放有机物来控制对生态系统功能重要的各种过程，但比较数据很少。因此，本研究比较了墨西哥加勒比海波多黎各莫雷洛斯港珊瑚礁泻湖中不同底栖初级生产者（海草，大型藻类和硬骨-锡尼珊瑚）释放的颗粒物和溶解有机物的数量。确定了释放有机物的微生物降解能力，并通过昼夜原位测量了不同初级生产者主导的泻湖中O_2的浓度。珊瑚的颗粒有机碳（POC）释放最高（8.2±4.2 mg m〜（-2）h〜（-1）），其次是底栖藻类（3.9±0.7 mg m〜（-2）h〜（-1）。 ）和海草（3.1±2.0 mg m〜（-2）h〜（-1））。海草的溶解有机碳（DOC）释放速率最高（15.8±6.0 mg m〜（-2）h〜（-1）），其次是藻类（1.9±2.0 mg m〜（-2）h〜（-1） ）），而珊瑚则显示出净DOC吸收。底栖藻类来源的有机物比浮游藻类或珊瑚来源的有机物刺激浮游微生物的O_2消耗显着更多。与其他底栖泻湖环境相比，原位O_2记录仪显示出藻类为主的地点的平均O_2浓度明显降低，尤其是在夜间。这表明藻类衍生的有机物对原位O_2可用性的影响。因此，我们建议，由于释放的有机物的数量，组成和微生物降解性的差异，底栖初级生产者主导地位的变化会影响生态系统的功能。

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  • 来源
    《Marine ecology progress series》 |2010年第23期|P.27-39|共13页
  • 作者

    Andreas F. Haas; Carin Jantzen; Malik S. Naumann; Roberto Iglesias-Prieto; Christian Wild;

  • 作者单位

    Coral Reef Ecology (CORE) Work Group, GeoBio-Center and Department of Earth & Environmental Science, Ludwig-Maximilians Universitat, Richard Wagner Strasse 10, 80333 Munich, Germany;

    rnCoral Reef Ecology (CORE) Work Group, GeoBio-Center and Department of Earth & Environmental Science, Ludwig-Maximilians Universitat, Richard Wagner Strasse 10, 80333 Munich, Germany Centre for Tropical and Marine Ecology (ZMT), Bremen, Germany;

    rnCoral Reef Ecology (CORE) Work Group, GeoBio-Center and Department of Earth & Environmental Science, Ludwig-Maximilians Universitat, Richard Wagner Strasse 10, 80333 Munich, Germany;

    rnReef Systems Unit, Instituto de Ciencias del Mar y Limnologia, Universidad Nacional Autonoma de Mexico, Apartado Postal 1152, Cancun QR 77500, Mexico;

    rnCoral Reef Ecology (CORE) Work Group, GeoBio-Center and Department of Earth & Environmental Science, Ludwig-Maximilians Universitat, Richard Wagner Strasse 10, 80333 Munich, Germany;

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  • 正文语种 eng
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  • 关键词

    organic matter; primary producer; caribbean reef lagoon; oxygen; coral; algae; seagrass;

    机译：有机物;主要生产者;加勒比礁礁湖;氧;珊瑚;藻类海草;

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