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首页> 外文期刊>International Journal of Marine Science >The Nutrient and Carbon Dynamics that Mutually Benefit Coral and Seagrass in Mixed Habitats under the Influence of Groundwater at Bise Coral Reef, Okinawa, Japan
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The Nutrient and Carbon Dynamics that Mutually Benefit Coral and Seagrass in Mixed Habitats under the Influence of Groundwater at Bise Coral Reef, Okinawa, Japan

机译：日本冲绳碧色珊瑚礁在地下水影响下的混合生境中的珊瑚和海草互惠互利的营养和碳动态

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摘要

The coral species, Montipora digitata and seagrass, Thalassia hemprichii , co-inhabit the southern portion of the reef moat in Bise, Okinawa, Japan. To elucidate the biogeochemical relationship between coral and seagrass in mixed communities of the coral reef ecosystem, the carbon metabolisms and the inorganic nitrogen flux rates were estimated in various reef habitats. We used benthic chambers to investigate sandy, seagrass, coral-seagrass mixed communities, coral, and acorn worm habitats. Relatively high concentrations of nitrate and nitrite ions (NOx) were observed in all habitats due to coastal groundwater inflow. The uptake rate constant of NOx was the highest in the coral-seagrass habitat and was significantly different from the rate constant in the seagrass habitat, indicating that seagrass benefits from co-inhabitation with coral. Dissolution of CaCO3 was observed in the seagrass and coral-seagrass communities. This decline in basal coral carbonate substrate may contribute to increased fragmentation and dispersal of the coral habitat. On a biogeochemical scale, the coral-seagrass relationship benefits the seagrass in terms of NOx availability and benefits the coral in terms of carbonate dissolution, increasing fragmentation, and furthering habitat development.
机译：在日本冲绳县比色市，珊瑚物种Montipora digitata和海草Thalessia hemprichii共同栖息在暗礁护城河的南部。为了阐明珊瑚礁生态系统混合社区中珊瑚与海草之间的生物地球化学关系，估计了各种珊瑚礁生境中的碳代谢和无机氮通量率。我们使用底栖室调查了沙质，海草，珊瑚-海草混合群落，珊瑚和橡子虫的栖息地。由于沿海地下水的流入，在所有生境中都观察到较高浓度的硝酸根和亚硝酸根离子（NO x ）。 NO x 的吸收速率常数在珊瑚-海草栖息地中最高，并且与海草栖息地中的速率常数显着不同，表明海草得益于与珊瑚的同居。在海草和珊瑚-海草群落中观察到了CaCO 3 的溶解。基础珊瑚碳酸盐基质的这种减少可能有助于增加珊瑚栖息地的破碎和扩散。从生物地球化学的角度来看，珊瑚-海草的关系从NO x 的可获得性方面使海草受益，从碳酸盐溶解，增加破碎化和促进栖息地发展方面使珊瑚受益。

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