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首页> 外文期刊>Estuarine Coastal and Shelf Science >Stable isotopes reveal the importance of saltmarsh-derived nutrition for two exploited penaeid prawn species in a seagrass dominated system
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Stable isotopes reveal the importance of saltmarsh-derived nutrition for two exploited penaeid prawn species in a seagrass dominated system

机译：稳定的同位素揭示了海草为主的系统中盐沼来源的营养对于两种对虾的开发对虾的重要性

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摘要

Estuaries represent highly important nursery habitats for a range of species, with refuge and nutrition being two key benefits derived from estuaries. Quantifying these benefits provides us with a means for enhancing fisheries productivity. Metapenaeus macleayi (School Prawn) and Penaeus plebejus (Eastern King Prawn) are two commercially and recreationally important species in New South Wales that utilise estuarine nurseries throughout their life history. In this study, stable isotopes of carbon, nitrogen and sulfur were used to determine the proportional contribution of primary producers to prawn nutrition in Brisbane Water (NSW). Both the saltmarsh grass Sporobolus virginicus and seagrass Zostera muelleri were found to support a high trophic contribution to prawns (up to 53% and 40%, respectively). The contributions of other primary producers such as mangroves, fine benthic organic matter (FBOM) and C-3 saltmarsh plants were generally found to be much lower (0.7-15%). Such findings are generally consistent with patterns observed in other south-east Australian estuaries, however such a dominant role of saltmarsh in the presence of seagrass is a novel finding. These results highlight linkages between habitats of conservation concern and highly valuable fisheries species, and the benefit of using sulfur as an additional marker in Bayesian mixing models examining estuarine food webs.
机译：河口是一系列物种的重要托儿所栖息地，避难和营养是河口带来的两个主要好处。量化这些收益为我们提供了提高渔业生产力的手段。 Metapenaeus macleayi（学校虾）和Penaeus plebejus（东部大虾）是新南威尔士州两个在商业和休闲上都很重要的物种，它们在整个生命历史中都利用河口苗圃。在这项研究中，使用碳，氮和硫的稳定同位素确定布里斯班水域（NSW）中初级生产者对虾营养的比例贡献。发现盐沼草Sporobolus virginicus和海草Zostera muelleri都对虾具有很高的营养贡献（分别高达53％和40％）。通常发现，其他主要生产者（例如红树林，精细底栖有机物（FBOM）和C-3盐沼植物）的贡献要低得多（0.7-15％）。这种发现通常与在澳大利亚东南部其他河口观察到的模式一致，但是盐沼在海草存在下的这种主导作用是一个新颖的发现。这些结果凸显了保护方面的栖息地与极具价值的渔业物种之间的联系，以及在检查河口食物网的贝叶斯混合模型中使用硫作为附加标记物的好处。

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