• Monday, Jan 17, 2022
  • Last Update : 03:32 am

Study: Human activity threatens species survival

  • Published at 02:39 pm February 2nd, 2021
Int'l-Study-Human activity threatens species survival
File Photo: Men walk past a dead Olive Ridley sea turtle washed ashore at Pattinapakkam beach, in Chennai on December 26, 2020 AFP

Most species have increased their travel distances by 70% due to human influence

Human activities such as farming and construction are threatening the survival of scores of wild species by forcing them to travel more to avoid mankind's impact, research showed on Monday.

According to the United Nations' biodiversity panel, more than three quarters of land and 40% of Earth's oceans have already been "severely degraded" by humans.

Its landmark biodiversity assessment in 2019 drew on a large body of research into how human activities are impacting nature.

But there have been relatively few studies looking at specific species and how human influence is changing their behaviour. 

Researchers in Australia looked at the impact of activities such as roads, tourism, recreation, hunting, shipping, and fishing on 167 species, from the 0.05-gram sleepy orange butterfly to the two-ton Great White shark.

They found that most species had increased the distance they travel due to human influence -- by 70% on average. 

In a third of species, movement had either increased or decreased by half, according to the study published in the journal Nature Ecology & Evolution. 

"This tells us that humans have widespread impacts on animal movement, but in many cases these are going undetected and unaddressed," lead author Tim Doherty, from the University of Sydney, told AFP. 

"In everyday life, we generally only see animals in the wild for short periods and don't get a proper understanding of how they move around and use space."

'Cascading impacts'

Doherty said that since many species, including most mammals, spend nearly all their energy on hunting for food and finding mates, the additional energy required to relocate away from humans was an unwelcome survival challenge.

"However, animals will often move further in response to disturbance to ensure their survival, for example by seeking shelter, finding food," he said.

"Some species are able to cope with these changes better than others."

Of the taxonomic groups studied, birds and insects moved the most on average in order to avoid coming into contact with human activity. 

The study warned of "cascading impacts" to natural processes such as pollination if such displacements continued apace.

The authors said they had documented a "global restructuring of animal movement, with potentially profound impacts on populations, species and ecosystem processes."

They called for better preservation of natural habitats through increasing protected areas and managing construction and tourism, as well as seasonal curbs on hunting during species' breeding periods.

50
Facebook 50
blogger sharing button blogger
buffer sharing button buffer
diaspora sharing button diaspora
digg sharing button digg
douban sharing button douban
email sharing button email
evernote sharing button evernote
flipboard sharing button flipboard
pocket sharing button getpocket
github sharing button github
gmail sharing button gmail
googlebookmarks sharing button googlebookmarks
hackernews sharing button hackernews
instapaper sharing button instapaper
line sharing button line
linkedin sharing button linkedin
livejournal sharing button livejournal
mailru sharing button mailru
medium sharing button medium
meneame sharing button meneame
messenger sharing button messenger
odnoklassniki sharing button odnoklassniki
pinterest sharing button pinterest
print sharing button print
qzone sharing button qzone
reddit sharing button reddit
refind sharing button refind
renren sharing button renren
skype sharing button skype
snapchat sharing button snapchat
surfingbird sharing button surfingbird
telegram sharing button telegram
tumblr sharing button tumblr
twitter sharing button twitter
vk sharing button vk
wechat sharing button wechat
weibo sharing button weibo
whatsapp sharing button whatsapp
wordpress sharing button wordpress
xing sharing button xing
yahoomail sharing button yahoomail