'On average, wildlife populations tracked by scientists shrank by nearly 70% between 1970 and 2018, a recent assessment by WWF and the Zoological Society of London found.'
Climatic changes render terrestrial habitats inhospitable too. In Australia, in the 2019-2020 fire season, around 10 million hectares of forestland was destroyed, killing more than 1 billion animals and displacing 3 billion others. For southeastern Australia,These losses are happening not just in land-based habitats but also out at sea. Coral reefs and vibrant underwater forests are some of the most threatened ecosystems in the world.
Despite these bright spots, the overall outlook remains gloomy. Even after discounting the extremes, the downward trend persists. “After we removed 10 percent of the complete data set, we still see declines of about 65 percent,” Robin Freeman, an author of the report and senior researcher at ZSL, said in a statement.
Often, habitat loss, overexploitation and climate change compound the risk. Even in cases where a changing climate proves favorable, the multitude of threats can prove insurmountable. Take bumblebees, for example. Some species, likeas average temperatures rise. But an assessment of 66 bumblebee species documented declining numbers because of pesticide and herbicide use.
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