Study on The Relationship between Vegetation Index And Bird Diversity in Beidagang Wetland

Abstract

Abstract Birds are an important part of wetland ecosystem. With the development of urbanization, bird vegetation is destroyed seriously, threatening bird diversity. In view of this, this paper studied the dynamic changes of NDVI (Normalized Difference Vegetation Index) and three bird diversity indexes (Shannon-Wiener index, Simpson index, Pielou index), and explored the relationship between the two, based on the wetland bird survey data and Landsat 8 remote sensing images from 2015 to 2019 in Beidagang Wetland. The results showed that: Although the growth condition of wetland plants changed from poor to better due to the ecological water rehydration measures adopted in the later period, the three indexes leveled off except in 2018. Spearman correlation analysis showed that Shannon-Wiener index was highly negatively correlated with NDVI, and slightly negatively correlated with Simpson index and Pielou index, indicating that NDVI in Beidagang Wetland had much less impact on bird diversity than other habitat factors, and could not play a leading role.