A Comparison of Salt Marsh Construction Costs with the Value of Exported Shrimp Production
A Comparison of Salt Marsh Construction Costs with the Value of Exported Shrimp Production
复制标题
盐沼建设成本与出口虾产值的比较
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
C. Liese
中科院分区：
文献类型：
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作者：
T. Minello;L. Rozas;P. Caldwell;C. Liese
对虾支持墨西哥湾北部宝贵的渔业，虾的生产力与沿海盐沼有关。美国得克萨斯州加尔维斯顿湾湿地的持续流失导致了各种盐沼恢复项目的发展。这些人工湿地往往试图模仿区域内的自然沼泽景观特征，并融入沼泽边缘，因为沼泽边缘对渔业生产似乎很重要。我们估计了其中9个人工湿地的对虾生产价值，并与项目建设成本进行了比较，项目建设成本在9,555美元到45,311美元之间。−1(2007年美国)人工湿地的虾年总产量在228万公斤/公顷−1到318万公斤/公顷−1之间。在调整自然死亡率和预期由沼泽取代开阔水域的产量后，人工湿地使虾的年产量增加了9000万到146万公斤/公顷−1。根据加尔维斯顿湾捕捞的虾的出船价格，这9个湿地的虾产量的年价值在425亿美元到690亿美元/公顷−1之间。就建设成本而言，沼泽梯田项目和用附近沉积物建造的小型沼泽岛的对虾产量高于用疏浚沙建造的沼泽岛。
Penaeid shrimp support valuable fisheries in the northern Gulf of Mexico, and shrimp productivity has been linked to coastal salt marshes. Continuing wetland loss in Galveston Bay, Texas (USA) has led to the development of various salt marsh restoration projects. These constructed wetlands often attempt to mimic natural marsh landscape characteristics within the region and incorporate marsh edge, because marsh edge appears important for fishery production. We estimated the value of shrimp production from nine of these constructed wetlands for comparison with project construction costs that ranged between $9,555 and $45,311 ha−1 (2007 U.S.) Overall annual shrimp production attributable to the constructed wetlands ranged from 228 to 318 kg ha−1. After adjusting for natural mortality and production expected from open water replaced by marsh, the constructed marshes contributed an enhanced annual shrimp production between 90 and 146 kg ha−1. The annual value of this shrimp production from the nine wetlands ranged from $425 to $690 ha−1, based on the ex-vessel price of shrimp harvested in Galveston Bay. In relation to construction costs, shrimp production was higher for marsh terracing projects and small marsh islands built with nearby sediment than for marsh islands built with dredged sand.