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首页> 外文会议>Remote sensing for agriculture, ecosystems, and hydrology XV >Correlation between the habitats productivity and species richness (amphibians and reptiles) in Portugal, through remote sensed data
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Correlation between the habitats productivity and species richness (amphibians and reptiles) in Portugal, through remote sensed data

机译：通过遥感数据，葡萄牙的栖息地生产力与物种丰富度（两栖动物和爬行动物）之间的相关性

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摘要

Several biogeographic theories propose that the species richness depends on the structure and ecosystems diversity. The habitat productivity, a surrogate for these variables, can be evaluated through satellite imagery, namely using vegetation indexes (e.g. NDVI). We analyzed the correlation between species richness (from the Portuguese Atlas of Amphibians and Reptiles) and NDVI (from Landsat, MODIS, and Vegetation images). The species richness database contains more than 80000 records, collected from bibliographic sources (at 1 or 10 km of spatial resolution) and fieldwork sampling stations (recorded with GPS devices). Several study areas were chosen for Landsat images (three subsets), and all Portugal for MODIS and Vegetation images. The Landsat subareas had different climatic and habitat characteristics, located in the north, center and south of Portugal. Different species richness datasets were used depending on the image spatial resolution: data with metric resolution were used for Landsat, and with 1 km resolution, for MODIS and Vegetation images. The NDVI indexes and all the images were calculated/processed in an open source software (Quantum GIS). Several plug-ins were applied in order to automatize several procedures. We did not find any correlation between the species richness of amphibians and reptiles (not even after separating both groups by species of Atlantic and Mediterranean affinity) and the NDVI calculated with Landsat, MODIS and Vegetation images. Our results may fail to find a relationship because as the species richness is not correlated with only one variable (NDVI), and thus other environmental variables must be considered.
机译：一些生物地理学理论认为，物种丰富度取决于结构和生态系统多样性。可以通过卫星图像（即使用植被指数（例如NDVI））评估栖息地生产力，作为这些变量的替代指标。我们分析了物种丰富度（来自葡萄牙两栖动物和爬行动物图集）与NDVI（来自Landsat，MODIS和植被图像）之间的相关性。物种丰富度数据库包含超过80000条记录，这些记录是从书目来源（空间分辨率为1或10 km）和野外采样站（使用GPS设备记录的）收集的。为Landsat影像（三个子集）选择了几个研究区域，为MODIS和植被影像选择了整个葡萄牙。 Landsat分区具有不同的气候和栖息地特征，位于葡萄牙的北部，中部和南部。根据图像空间分辨率使用不同的物种丰富度数据集：Landsat使用公制分辨率的数据，而MODIS和植被图像使用分辨率为1 km的数据。 NDVI索引和所有图像均在开源软件（Quantum GIS）中进行了计算/处理。应用了几个插件以使多个过程自动化。我们没有发现两栖动物和爬行动物的物种丰富度（即使在按大西洋和地中海亲和性物种将两组分开后也没有）与用Landsat，MODIS和植被图像计算出的NDVI之间没有任何相关性。我们的结果可能找不到关系，因为物种丰富度不仅与一个变量（NDVI）不相关，因此必须考虑其他环境变量。

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  • 会议地点 Dresden(DE)
  • 作者

    A. C. Teodoro; N. Sillero; S. Alves; L. Duarte;

  • 作者单位

    Dep. of Geosciences, Environment and Land Planning, Faculty of Sciences, University of Porto, Rua Campo Alegre, 4169-007, Porto, Portugal,Geo-Space Sciences Research Centre, Faculty of Sciences, University of Porto, Rua Campo Alegre, 4169-007, Porto, Portugal;

    Geo-Space Sciences Research Centre, Faculty of Sciences, University of Porto, Rua Campo Alegre, 4169-007, Porto, Portugal;

    Dep. of Geosciences, Environment and Land Planning, Faculty of Sciences, University of Porto, Rua Campo Alegre, 4169-007, Porto, Portugal;

    Dep. of Geosciences, Environment and Land Planning, Faculty of Sciences, University of Porto, Rua Campo Alegre, 4169-007, Porto, Portugal,Geo-Space Sciences Research Centre, Faculty of Sciences, University of Porto, Rua Campo Alegre, 4169-007, Porto, Portugal;

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  • 正文语种 eng
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  • 关键词

    NDVI; Amphibians and Reptiles; MODIS; Landsat. Vegetation; Correlation analysis;

    机译：NDVI；两栖动物和爬行动物； MODIS; Landsat。植被;相关分析;

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