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Global mapping reveals increase in lacustrine algal blooms over the past decade
Hou, X.; Feng, L.; Dai, Y.; Hu, C.; Gibson, L.; Tang, J.; Lee, Z.; Wang, Y.; Cai, X.; Liu, J.; Zheng, Y.; Zheng, C. (2022). Global mapping reveals increase in lacustrine algal blooms over the past decade. Nature Geoscience 15(2): 130-134. https://dx.doi.org/10.1038/s41561-021-00887-x
In: Nature Geoscience. Nature Publishing Group: London. ISSN 1752-0894; e-ISSN 1752-0908
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Marien/Kust; Zoet water
Auteurs  Top 
  • Hou, X.
  • Feng, L.
  • Dai, Y.
  • Hu, C.
  • Gibson, L.
  • Tang, J.
  • Lee, Z.
  • Wang, Y.
  • Cai, X.
  • Liu, J.
  • Zheng, Y.
  • Zheng, C.
Abstract
    Algal blooms constitute an emerging threat to global inland water quality, yet their spatial and temporal distribution at the global scale remains largely unknown. Here we establish a global bloom database, using 2.91 million Landsat satellite images from 1982 to 2019 to characterize algal blooms in 248,243 freshwater lakes, representing 57.1% of the global lake area. We show that 21,878 lakes (8.8%) spread across six continents have experienced algal blooms. The median bloom occurrence of affected lakes was 4.6%, but this frequency is increasing; we found increased bloom risks in the 2010s, globally (except for Oceania). The most pronounced increases were found in Asia and Africa, mostly in developing countries that remain reliant on agricultural fertilizer. As algal blooms continue to expand in scale and magnitude, this baseline census will be vital towards future risk assessments and mitigation efforts.
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