HOME >> BIOLOGY >> NEWS
Fragmentation may be linked to local amphibian extinctions

Habitat fragmentation is a primary threat to amphibians worldwide, and new research suggests one of the reasons why. Experimental evidence for three species shows that fragmentation may hinder the dispersal of juvenile amphibians, which could contribute to population declines.

"Habitat fragmentation is likely to reduce dispersal rates between local populations of these three species," say Betsie Rothermel and Raymond Semlitsch of the University of Missouri in Columbia in the October issue of Conservation Biology.

Dispersal of juvenile amphibians is critical to maintaining populations of pond-breeding species. Local populations of these amphibians naturally die out frequently but are replenished by juveniles from other ponds (adults rarely switch breeding sites). "Interpond dispersal is the means by which declining populations may be rescued or recolonized following extinction," say the researchers. However, little is known about how habitat disturbance affects the dispersal of juvenile amphibians.

Rothermel and Semlitsch studied the movements of three types of juvenile amphibians (spotted salamander, small-mouthed salamander and American toad) in the 127-ha C.W. Green Conservation Area in Boone County, Missouri. In the midwestern U.S., much of the land around amphibian breeding sites has been converted from forest to cropland or pasture. The researchers collected amphibian eggs in the wild, raised them in tanks, transferred the larvae to artificial pools on the edges between forest and old fields, and then studied their movements during the first two months after metamorphosis.

While small-mouthed salamanders showed no preference for forest or old field, the researchers found that the other two species studied moved farther into the forest than into old fields. Spotted salamanders moved almost eight times farther and toads moved more than three times farther (spotted salamanders moved 43 vs. 5 feet in the forest and old field, respe
'"/>

Contact: Betsie Rothermel
bbrd7b@mizzou.edu
573-882-1421
Society for Conservation Biology
24-Sep-2002


Page: 1 2

Related biology news :

1. Fragmentation can make seedlings wimpy
2. Fragmentation may limit songbird sex lives
3. Fragmentation linked to stress in birds
4. Fewer Songbirds May Be Result Of Forest Fragmentation Across The American South, New Study Suggests
5. Fragmentation Of Tropical Forests Can Create "Genetic Bottleneck," According To New University Of Georgia Study
6. Genetic mutations linked to the practice of burning coal in homes in China
7. Enzyme maintaining chromosome ends is linked to bone cancer recurrence, decreased survival
8. Protein involved in childhood disorder linked to cancer
9. Mouse study shows NPAS3 and NPAS1 genes may be linked to psychosis
10. Gene linked to cleft lip and palate identified
11. Schizophrenia gene variant linked to risk traits

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/29/2017)...  higi, the health IT company that operates the ... , today announced a Series B investment from ... The new investment and acquisition accelerates higi,s strategy to ... population health activities through the collection and workflow integration ... collects and secures data today on behalf of over ...
(Date:3/27/2017)... 2017  Catholic Health Services (CHS) has been ... (HIMSS) Analytics for achieving Stage 6 on the ... In addition, CHS previously earned a place in ... electronic medical record (EMR). "HIMSS Analytics ... EMR usage in an outpatient setting.  This recognition ...
(Date:3/24/2017)... Mar 24, 2017 Research and Markets has ... Market Analysis & Trends - Industry Forecast to 2025" report ... ... at a CAGR of around 15.1% over the next decade to ... report analyzes the market estimates and forecasts for all the given ...
Breaking Biology News(10 mins):
(Date:4/25/2017)... ... , ... Leaders of Quorum Review IRB and Kinetiq , ... this week’s Association of Clinical Research Professionals (ACRP) 2017 Meeting & Expo ... "We are excited to present subject matter expertise on topics that impact the global ...
(Date:4/21/2017)... Austin, TX (PRWEB) , ... April 21, 2017 , ... ... more than a year, Formaspace is pleased to introduce it to top lab design ... Carolina. Formaspace CEO Jeff Turk and VP of Industrial Design and Engineering Greg Casey ...
(Date:4/21/2017)... ... 2017 , ... Frederick Innovative Technology Center, Inc. (FITCI), a ... technology start-ups, is hosting “Celebration Friday” (a festive gathering highlighting client success stories) ... and networking at 3:30 p.m. at FITCI’s 4539 Metropolitan Court location, off English ...
(Date:4/20/2017)... , April 20, 2017  Eli Lilly and Company ... data evaluating galcanezumab for the prevention of migraine at ... will take place April 22-28, 2017, in ... four abstracts at AAN, including safety and patient outcomes ... associated with a reduction in monthly migraine headache days ...
Breaking Biology Technology:
Cached News: