Navigation Links
Climate change and evolution of Cross River gorillas
Date:4/4/2011

Two species of gorillas live in central equatorial Africa. Divergence between the Western gorillas (Gorilla gorilla) and Eastern gorillas (Gorilla beringei) began between 0.9 and 1.6 million years ago and now the two species live several hundred kilometres apart. An international team of researchers including Olaf Thalmann of the University of Turku in Finland and Linda Vigilant of the Max Planck Institute for Evolutionary Anthropology in Germany found that the divergence of Western lowland gorillas and the critically endangered Cross River gorillas (Gorilla gorilla diehli) occurred more recently, about 17,800 years ago, during the Pleistocene era (BMC Evolutionary Biology, April 01, 2011).

An evolutionary model of the two subspecies of Western gorillas was generated using microsatellite genotyping of living gorillas and 100-year-old museum specimens. This data showed that, although Cross River gorillas diverged from Western lowland gorillas about 17,800 years ago, the two subspecies continued to interbreed intermittently. Olaf Thalmann and his co-authors suggest that climate change during the Pleistocene era caused the forests to expand, permitting the Western gorillas to expand their range. When the forest contracted again the gorillas were separated into two populations which began to diverge. Successive rounds of climate change resulted in periods when the two subspecies could interbreed followed by repeated episodes of isolation of the Cross River population.

The model indicates that gene flow finally stopped between the two subspecies approximately 420 years ago. Over the last 320 years there has been a 60% decrease in the numbers of Cross River gorillas causing a loss of genetic diversity within the population. Thalmann said, "The number of Cross River gorillas has continued to decrease, probably due to anthropogenic pressure, such as destruction of their habitat or hunting by humans. There are thought to be fewer than 300 individuals left."

He continued, "It is unclear what effect this loss of genetic diversity will have on the long term viability of Cross River gorillas. But, given that this bottleneck occurred so recently, it is possible that if the population was allowed to expand the loss of diversity could be stopped."


'/>"/>

Contact: Sandra Jacob
jacob@eva.mpg.de
49-341-355-0122
Max-Planck-Gesellschaft
Source:Eurekalert  

Related biology news :

1. Epidemiological study demonstrates climate change effects on forests
2. Some populations of Fraser River salmon more likely to survive climate change: UBC study
3. Antarctic icebergs play a previously unknown role in global carbon cycle, climate
4. Uncertain future for Joshua trees projected with climate change
5. Conservationists develop coral stress test to identify reefs of hope in climate change era
6. Intervention offers best chance to save species endangered by climate change
7. Plasticity of plants helps them adapt to climate change
8. Water for an integrative climate paradigm
9. Colloquium on Interdisciplinary Climate Science, March 31-April 2
10. Mapping human vulnerability to climate change
11. Diversifying crops may protect yields against a more variable climate
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Climate change and evolution of Cross River gorillas
(Date:4/13/2017)... India , April 13, 2017 According to ... Proofing, Identity Authentication, Identity Analytics, Identity Administration, and Authorization), Service, Authentication Type, ... MarketsandMarkets™, the IAM Market is expected to grow from USD 14.30 Billion ... Growth Rate (CAGR) of 17.3%. ... MarketsandMarkets ...
(Date:4/6/2017)... Forecasts by Product Type (EAC), ... End-Use (Transportation & Logistics, Government & Public Sector, Utilities ... Generation Facility, Nuclear Power), Industrial, Retail, Business Organisation (BFSI), ... you looking for a definitive report on the $27.9bn ... ...
(Date:4/3/2017)... 3, 2017  Data captured by IsoCode, ... detected a statistically significant association between the ... treatment and objective response of cancer patients ... predict whether cancer patients will respond to ... well as to improve both pre-infusion potency testing ...
Breaking Biology News(10 mins):
(Date:7/24/2017)... ... July 24, 2017 , ... ... Soulstring, today announced that the stock market news outlet had initiated coverage ... diagnostic testing that screens and identifies exposure, progression and risk analysis from ...
(Date:7/20/2017)... ... July 20, 2017 , ... Dr. Asher Kimchi, Founder and Chairman ... the 2017 IAC Awards at the 22nd World Congress on Heart Disease held in ... faculty to receive the Distinguished Fellowship Awards. , Dr. Asher Kimchi, together with Co-Chairmen ...
(Date:7/20/2017)... (PRWEB) , ... July 20, 2017 , ... ... multi-part seminar on digital pathology and artificial intelligence Tuesday, July 25, during the ... Alexander Baras from Johns Hopkins Medicine. , Baras, Associate Director of Pathology ...
(Date:7/20/2017)... NV (PRWEB) , ... July 20, 2017 , ... ... real solution to make clinical trial sites and study participants truly unified. TrialKit, ... regulatory compliant (FDA 21 CFR Part 11) research studies entirely on mobile devices. ...
Breaking Biology Technology: