Featured Research

from universities, journals, and other organizations

Presence of human settlements has negative impact on tiger connectivity

Date:
November 6, 2013
Source:
Public Library of Science
Summary:
Human settlements and roads place greater barriers on tiger dispersal than distance.

Human settlements and roads place greater barriers on tiger dispersal than distance, according to new research published November 6th in the open-access journal PLOS ONE, by Uma Ramakrishnan and colleagues at the National Center for Biological Sciences in India.

Related Articles


Many tigers currently live in small protected areas in India, and their future survival depends on increasing the connectivity between these areas via "tiger corridors." In addition to overall distance, there are a number of factors that might limit this connectivity, including features of the landscape such as roads, availability of tiger habitat, and human habitation.

In this study, the authors used genetic approaches combined with landscape ecology to study tiger dispersals between six protected areas in Central India. They address two main questions; whether tiger populations in Central India are connected over long distances, and which landscape features, if any, affect this connectivity. By sampling tiger scat for DNA across a wide range of areas and analyzing the genetic information of parents and offspring, they found evidence for long-range tiger dispersal of over 650 km between protected areas, which is much longer than previously found. They next analyzed this data in the context of landscape features, and found that this long-range connectivity is negatively impacted by the size and location of urban settlements and road density, but not affected by distance between populations.

From a conservation perspective, these findings suggest that urbanization and unplanned development will reduce connectivity for tiger populations in Central India. To help maintain the connectivity and survival of tigers, management strategies should consider the effects of these features of the landscape. Ramakrishnan expands, "We used landscape genetic approaches based on fecal DNA from protected areas in the Central Indian landscape to reveal that tigers are dispersing much longer distances than has been previously recorded. Additionally, our analyses reveal that human footprints on the landscape (roads, settlements) negatively impact connectivity between populations."


Story Source:

The above story is based on materials provided by Public Library of Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. Aditya Joshi, Srinivas Vaidyanathan, Samrat Mondol, Advait Edgaonkar, Uma Ramakrishnan. Connectivity of Tiger (Panthera tigris) Populations in the Human-Influenced Forest Mosaic of Central India. PLoS ONE, 2013; 8 (11): e77980 DOI: 10.1371/journal.pone.0077980

Cite This Page:

Public Library of Science. "Presence of human settlements has negative impact on tiger connectivity." ScienceDaily. ScienceDaily, 6 November 2013. <www.sciencedaily.com/releases/2013/11/131106202249.htm>.
Public Library of Science. (2013, November 6). Presence of human settlements has negative impact on tiger connectivity. ScienceDaily. Retrieved February 1, 2015 from www.sciencedaily.com/releases/2013/11/131106202249.htm
Public Library of Science. "Presence of human settlements has negative impact on tiger connectivity." ScienceDaily. www.sciencedaily.com/releases/2013/11/131106202249.htm (accessed February 1, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Sunday, February 1, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Nanoscale Sensor Could Help Wine Producers and Clinical Scientists

Nanoscale Sensor Could Help Wine Producers and Clinical Scientists

Reuters - Innovations Video Online (Jan. 30, 2015) A nanosensor that mimics the oral effects and sensations of drinking wine has been developed by Danish and Portuguese researchers. Jim Drury saw it in operation. Video provided by Reuters
Powered by NewsLook.com
Dog-Loving Astronaut Wins Best Photo of 2015

Dog-Loving Astronaut Wins Best Photo of 2015

Buzz60 (Jan. 30, 2015) Retired astronaut and television host, Leland Melvin, snuck his dogs into the NASA studio so they could be in his official photo. As Mara Montalbano (@maramontalbano) shows us, the secret is out. Video provided by Buzz60
Powered by NewsLook.com
U.S. Wants to Analyze DNA from 1 Million People

U.S. Wants to Analyze DNA from 1 Million People

Reuters - US Online Video (Jan. 30, 2015) The U.S. has proposed analyzing genetic information from more than 1 million American volunteers to learn how genetic variants affect health and disease. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Rarest Cat on Planet Caught Attacking Monkeys on Camera

Rarest Cat on Planet Caught Attacking Monkeys on Camera

Buzz60 (Jan. 30, 2015) An African Golden Cat, the rarest large cat on the planet was recently caught on camera by scientists trying to study monkeys. The cat comes out of nowhere to attack those monkeys. Patrick Jones (@Patrick_E_Jones) has the rest. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins