Sensitivity and reliability of diatom metrics and guilds in detecting the impact of urbanization on streams

The impact of land use changes on stream biota is the major concern of aquatic biodiversity conservation in the context of the rapid global population growth

Evance Omondi Mbao

2020

Scholarcy highlights

  • The impact of land use changes on stream biota is the major concern of aquatic biodiversity conservation in the context of the rapid global population growth
  • The impact of urbanization on benthic diatoms has not been well understood in China
  • In the hope of promoting the understanding of this issue, a research program is designed to examine the responses of selected diatom metrics to urbanization in the Qiantang River Basin
  • The study identifies a total of 143 taxa belonging to 34 genera and 20 families, with an average of 32 taxa per site
  • Watershed land use and nutrients explain 55% of the variation in TDI
  • A total of three metrics and two guilds respond to urbanization significantly, and their variations are explained more by land uses at watershed scale than by those at local scale
  • The results of the study highlight the sensitive responses of diatom metrics and guilds to urbanization, which may provide effective tools in the assessment of urbanization impact on streams in China

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