HOME >> BIOLOGY >> NEWS
Does tropical biodiversity increase as rainforest area expands during global warming?

"Plant diversity seems to increase when tropical forests cover large areas. Shrinking ecosystems may experience biodiversity loss lasting for millions of years." Carlos Jaramillo, at the Smithsonian Tropical Research Institute (STRI), and colleagues seek explanations for the longest Central and South America pollen record, published in the March 31, 2006 issue of the journal Science.

"Jaramillo's intriguing findings provide an evolutionary perspective on a modern crisis," William Laurance of STRI and the Biological Dynamics of Forest Fragments project in Brazil comments, "They suggest that the rapid contemporary loss and fragmentation of rainforests will lead to striking, long-term biodiversity declines."

Jaramillo et al. used cores drilled through 5km of rock in eastern Colombia and western Venezuela to get at the fossil pollen record in a sequence of samples representing 10 to 82 million years before present. Then they correlated pollen diversity with global temperature estimates for the middle part of that sequence (20-65 mybp).

"We found that pollen diversity tracks global temperature through time over millions of years. Diversity increases as the planet warms and decreases as it cools. The mystery is that even when global temperatures vary enormously, average temperatures in the tropics don't change much, so why do we see global temperature patterns reflected in tropical plant diversity?" Jaramillo proposes that changes in area drive speciation and extinction in the tropics.

"There is good correlation between area and number of species: more area implies more species. During global warming, tropical areas expand and diversity goes up, the opposite happens during global cooling. If this is the case, fragmentation of modern tropical forest could be equated to a global cooling period, because forested areas are shrinking dramatically, resulting in plummeting diversity in the forests that remain."

Authors:
'"/>

Contact: Carlos Jaramillo
jaramilloc@si.edu
20-278-620-948-089
Smithsonian Tropical Research Institute
30-Mar-2006


Page: 1 2

Related biology news :

1. New study warns limited carbon market puts 20 percent of tropical forest at risk
2. Satellite survey links tropical park fires with poverty and corruption
3. Northern forests less effective than tropical forests in reducing global warming
4. Research finds evidence tropical cyclones have climate-control role
5. Brazil demonstrating that reducing tropical deforestation is key win-win global warming solution
6. Drought sensitivity shapes species distribution patterns in tropical forests
7. Scientists: As rainfall changes, tropical plants may acclimate
8. Drought limits tropical plant distributions, scientists at the Smithsonian report
9. Madagascan tropical forests return thanks to better management and well-defined ownership
10. Microfossils unravel climate history of tropical Africa
11. Soil nutrients shape tropical forests, large-scale study indicates

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


(Date:9/15/2018)... ... September 14, 2018 , ... The first ever production picosecond-domain laser with a ... and purple tattoo inks - often the colors most resistant to laser removal. , ... of the American Society for Laser Medicine and Surgery, Inc. (ASLMS) investigated the safety ...
(Date:9/12/2018)... Fla. (PRWEB) , ... September 12, 2018 , ... ... and intuitive spine fusion solutions announced today it has received 510(k) clearance from ... Pedicle Screw complementing its TowerLOX® MIS Pedicle Screw System. , TowerLOX-EXT MIS Extended ...
(Date:8/31/2018)... ... August 30, 2018 , ... R3 Stem Cell, the nation's ... new clients. The freezers are very convenient for practices to maintain regenerative biologics ... of amniotic and umbilical cord tissue. They are stored at -80 degrees Celsius, ...
Breaking Biology News(10 mins):
(Date:9/22/2018)... and WESTMINSTER, Colo. (PRWEB) , ... ... ... and Flagship Biosciences are excited to announce a strategic venture. The synergistic ... digital pathology platform provides complimentary and comprehensive biomarker profiling to empower clinical ...
(Date:9/13/2018)... ... 2018 , ... Asymmetrex’s director, James L. Sherley, M.D., Ph.D., asks ... if we didn’t have the means to measure the number of drug molecules in ... And that is what’s holding up progress in stem cell medicine.” , “Can you ...
(Date:9/7/2018)... ... September 05, 2018 , ... Now available on live stream, ... held on Sept. 19, 2018. With a panel of industry leaders from Harvard, Cornell, ... will reveal industry insights from experts in the field. Register today to be ...
(Date:9/1/2018)... ... August 31, 2018 , ... Rudina Thanasi, ... of a proprietary biofield energy treated nutraceutical supplement used in combating inflammation and ... response and blood, as well as, organ-specific inflammation. The reported data is as ...
Breaking Biology Technology:
Cached News: