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首页> 外文期刊>Aquatic Sciences >Critical regions: A GIS-based model of marine productivity hotspots
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Critical regions: A GIS-based model of marine productivity hotspots

机译:关键区域:基于GIS的海洋生产力热点模型

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Marine productivity hotspots can be defined as areas of high chlorophyll concentration and low temperature distribution. Here we demonstrate how Geographic Information Systems (GIS) can be used to define areas of high productivity and we use fishery data to verify model results and reveal areas of potential fishery locations. We develop a GIS model based on spatial data integration between monthly satellite imagery of Advanced Very High Resolution Radiometer (AVHRR) sea surface temperature (SST) and Sea-viewing Wide Field-of-view Sensor (SeaWiFS) chlorophyll concentration (Chl-a) for Eastern Mediterranean waters. Data are analyzed for the production of climatology and mapping of anomaly distribution in these environmental parameters. The geographic distributions of anomalies are spatially integrated to map areas of combined persistent environmental anomaly of below average SST and above average Chl-a (lowSST/highChl-a) indicating marine productivity hotspots and potential fish feeding aggregation regions. A preliminary comparison of surveyed fisheries production data for small pelagic fish and pelagic cephalopods to lowSST/highChl-a areas is performed for the period from December 1997 to November 2001, revealing potential spatial associations among fishery resources and productivity hotspots in terms of unexploited regions as well as overexploited fishing grounds that could be characterized as candidate marine protected areas.
机译:海洋生产力热点可以定义为高叶绿素浓度和低温分布的区域。在这里,我们演示了如何使用地理信息系统(GIS)来定义高产区域,并且我们使用渔业数据来验证模型结果并揭示潜在渔业位置的区域。我们基于先进的超高分辨率辐射计(AVHRR)的每月卫星图像海面温度(SST)和海景宽视野传感器(SeaWiFS)叶绿素浓度(Chl-a)之间的空间数据集成开发了GIS模型地中海东部水域。在这些环境参数中分析了气候产生和异常分布图的数据。异常的地理分布在空间上进行了整合,以绘制出低于平均SST和高于平均Chl-a(lowSST / highChl-a)的持续存在的环境异常组合区域,这些区域指示了海洋生产力的热点和潜在的鱼类摄食聚集区。对1997年12月至2001年11月期间小中上层鱼类和中上层头足类鱼类与低SST / highChl-a区域的渔业生产数据进行了初步比较,揭示了渔业资源和生产力热点之间潜在的空间联系,即未开发区域为以及过度开采的渔场,这些渔场可被视为候选海洋保护区。

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