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:7/9/2019)... ... July 09, 2019 , ... ... Genetic Research into its incubator program. The founder and CEO of Tx Genetic, ... the lives of those suffering from epithelial connective tissue disorders. , “We are ...
(Date:6/25/2019)... ... June 25, 2019 , ... ActX has launched a ... available from 23andMe, customers can get access to professionally reviewed genetic screening similar ... 23andMe Ancestry and Health + Ancestry customers., With the ActX + 23andMe service, ...
(Date:6/16/2019)... ... June 14, 2019 , ... ... lecture at the fifth annual Neodent World Congress. Attended by thousands of dental ... and latest advancements in the world of dentistry. The three-day event featured a ...
Breaking Biology News(10 mins):
(Date:6/11/2019)... , ... June 10, 2019 , ... ... its distribution network with the appointment of Biofeedback Tech Ltd as ... systems are an essential part of many therapeutic treatments and clinical assessment protocols ...
(Date:6/11/2019)... ... June 10, 2019 , ... ... will add 80 of its scientific journals to DeepDyve’s rental service for peer-reviewed ... DeepDyve’s continually expanding library of more than 20 million articles, sourced from more ...
(Date:6/11/2019)... ... June 11, 2019 , ... Veterinary Regenerative Medicine company, ... , has announced that their GMP facility for cell production is now approved ... This is an important milestone for VetStem as it expands into contract ...
(Date:6/6/2019)... ... June 05, 2019 , ... WCCT Global, Inc ... device industries, announced today that they will be receiving 3 awards at the 2019 ... WCCT received 2 awards in the categories of overall Quality and Compatibility (Access to ...
Breaking Biology Technology:
Cached News: