Carbon and nutrient deposition in a Mediterranean seagrass (Posidonia oceanica) meadow
Carbon and nutrient deposition in a Mediterranean seagrass (Posidonia oceanica) meadow
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DOI：
10.4319/lo.2002.47.1.0023
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发表时间：
2002-01-01
影响因子：
4.5
通讯作者：
Middelburg, JJ
中科院分区：
文献类型：
--
作者：
Gacia, E;Duarte, CM;Middelburg, JJ
对西班牙东北部大洋草甸下沉积物中碳(C)、氮(N)和磷(P)的年沉积通量进行了估算，阐明了沉积物质的来源和去向。碳的年沉降量为198gCm(-2)yr(-2)，其中72%来自Seston，28%来自P.Ocean碎屑。氮(13.4g Nm(-2)yr(-1))和磷(2.01gPm(-2)yr(-1))的沉积通量较差，但与支持海洋对虾生长所需的营养输入相当。沉积物中的再矿化只返回15.6gCm(-2)yr(-1)，净积累碳182gCm(-2)yr(-1)。我们的结果表明，地中海沿岸的海洋对虾草甸是有机碳净埋藏的重要场所，来自沉积的海藻颗粒和海草碎屑。
The annual depositional flux of carbon (C), nitrogen (N), and phosphorous (P) to the sediments under a northeast Spain Posidonia oceanica meadow was evaluated, and the sources and fate of the material deposited elucidated. The annual deposition of carbon represented 198 g C m(-2) yr(-2), 72% of which was derived from the seston and 28% from P. oceanica detritus. The depositional flux was poor in nitrogen (13.4 g N m(-2) yr(-1)) and phosphorous (2.01 g P m(-2) yr(-1)), although comparable to the nutrient inputs required to support the growth of P. oceanica. Remineralization in the sediment only returned 15.6 g C m(-2) yr(-1), yielding a net carbon accumulation of 182 g C m(-2) yr(-1). Our results show that in the Mediterranean littoral P. oceanica meadows are important sites of net organic carbon burial, derived from sedimented sestonic particles and seagrass detritus.