Chytrid Causes Collapse of Anuran Species Richness - Dendroboard
Dendroboard

Go Back   Dendroboard > Dart Frogs > Frognet Feed > Frogroom
Register Blogs FAQ Calendar Mark Forums Read Advertise

Support Our Sponsors
No Threads to Display.

facebook

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 11-16-2010, 04:40 PM
Senior Member
 
Join Date: Sep 2008
Posts: 3,023
Thanks: 0
Thanked 11 Times in 11 Posts
Default Chytrid Causes Collapse of Anuran Species Richness



"Amphibians are declining worldwide, but these declines have been particularly dramatic in tropical mountains, where high endemism and vulnerability to an introduced fungal pathogen, Batrachochytrium dendrobatidis (Bd), is associated with amphibian extinctions. We surveyed frogs in the Peruvian Andes in montane forests along a steep elevational gradient (12003700 m). We used visual encounter surveys to sample stream-dwelling and arboreal species and leaf-litter plots to sample terrestrial-breeding species. We compared species richness and abundance among the wet seasons of 1999, 2008, and 2009. Despite similar sampling effort among years, the number of species (46 in 1999) declined by 47% between 1999 and 2008 and by 38% between 1999 and 2009. When we combined the number of species we found in 2008 and 2009, the decline from 1999 was 36%. Declines of stream-dwelling and arboreal species (a reduction in species richness of 55%) were much greater than declines of terrestrial-breeding species (reduction of 20% in 2008 and 24% in 2009). Similarly, abundances of stream-dwelling and arboreal frogs were lower in the combined 20082009 period than in 1999, whereas densities of frogs in leaf-litter plots did not differ among survey years. These declines may be associated with the infection of frogs with Bd. B. dendrobatidis prevalence correlated significantly with the proportion of species that were absent from the 2008 and 2009 surveys along the elevational gradient. Our results suggest Bd may have arrived at the site between 1999 and 2007, which is consistent with the hypothesis that this pathogen is spreading in epidemic waves along the Andean cordilleras. Our results also indicate a rapid decline of frog species richness and abundance in our study area, a national park that contains many endemic amphibian species and is high in amphibian species richness."

Batrachochytrium dendrobatidis and the Collapse of Anuran Species Richness and Abundance in the Upper Manu National Park, Southeastern Peru. Conservation Biology 5th November 2010. doi 10.1111/j.1523-1739.2010.01604.x






More...
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
New species of poison dart frog found - sister species of terribilis luckyfrog Science & Conservation 17 03-28-2010 05:21 AM
Choosing a species/your favorite species discussion visionteacher Beginner Discussion 17 08-03-2009 03:55 PM
More on chytrid feeds Frogroom 0 06-05-2009 08:50 AM
New species discovered & and chytrid related news... Dendro Dave Science & Conservation 3 01-07-2008 12:33 AM
Let's see some other anuran vivarium pics Rain_Frog The Lounge 18 10-25-2005 02:11 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 06:24 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.