Wednesday, 20 February 2019

On the land, one-quarter of vertebrates die because of humans


Our species has 'disproportionate effect' on others, scientists say
Date:  February 11, 2019
Source:  SUNY College of Environmental Science and Forestry
Humans have a "disproportionately huge effect" on the other species of vertebrates that share Earth's surface with us, causing more than 25 percent of the deaths among an array of species all over the globe, according to a recently published study.
A team of scientists from the SUNY College of Environmental Science and Forestry (ESF) in Syracuse, New York, and the U.S. Department of Agriculture analyzed the deaths of 42,755 animals that were reported in 1,114 published studies. They found that 28 percent of the animals' deaths were directly caused by humans.
The study was published in January in the journal Global Ecology and Biogeography.
"We all know humans can have a substantial effect on wildlife. That we are only one among over 35,000 species of terrestrial vertebrates worldwide yet responsible for more than one-fourth of their deaths provides perspective on how large our effect actually is," said co-author Jerrold L. Belant, the Camp Fire Conservation Fund professor at ESF. "And that's just direct causes. When you also consider urban growth and other land use changes that reduce habitat, it becomes clear humans have a disproportionate effect on other terrestrial vertebrates."
Belant conducted the study with Jacob E. Hill, another ESF faculty member, and Travis L. DeVault of the USDA Animal and Plant Health Inspection Service.



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