Navigation Links
From tropics to poles: Study reveals diversity of life in soils
Date:10/18/2011

Microscopic animals that live in soils are as diverse in the tropical forests of Costa Rica as they are in the arid grasslands of Kenya, or the tundra and boreal forests of Alaska and Sweden.

That conclusion is found in research results published today in the journal Proceedings of the National Academy of Sciences.

Scientists have generally accepted that a wider range of species can be found above ground at the equator than at the Earth's poles.

But this study proves for the first time that the same rules don't apply to the nematodes, mites and springtails living underground.

The team of National Science Foundation- (NSF) funded ecologists includes Tiehang Wu and Jim Garey at the University of South Florida, Diana Wall at Colorado State University, Ed Ayres now at Neon Inc. in Colorado, and Richard Bardgett at the University of Lancaster in the United Kingdom.

"Scientist E.O. Wilson noted that the key to understanding Earth's biodiversity lies in exploration of its smallest life forms," said Matt Kane, program director in NSF's Division of Environmental Biology, which funded the research.

"Important affirmation of this idea is provided in this global study of animals, in which the significance of belowground biodiversity is revealed."

This is the first comprehensive molecular analysis--at nearly a species resolution--of the global distribution of soil animals across a broad range of ecosystems from the tropics to the poles.

Soil samples were taken from 11 sites around the world, including tropical forest in Costa Rica, arid grassland in Kenya, warm temperate forest in New Zealand, shrub steppe of Argentina and tundra and boreal forest of Alaska and Sweden.

Through DNA testing, researchers found that each location had a diversity of soil animals, but that each ecosystem is unique with its own soil animals--illustrating an "amazing diversity of species" that had never been discovered before, said Garey.

"On average, 96 percent of our identified soil animals were found at only a single location, suggesting that most soil animals have restricted distributions, or in other words, they are endemic," said Wall.

"This challenges the long-held view that these smaller animals are widely distributed. However, unlike most above-ground organisms, there was no indication that latitude made a difference in soil animal diversity."

"Mites and roundworms dominate soil ecology and contribute to the breakdown and cycling of nutrients in the soil," Garey said. "These animals are essential to the proper functioning of the soil ecosystem in natural and farmlands."

The researchers also examined how the global distribution of soil animals relates to factors such as climate, soil nutrient levels and aboveground biodiversity.

Results showed that sites with greater aboveground biodiversity appeared to have lower diversity beneath in soils.

The main factors explaining this low soil animal diversity at sites with high aboveground diversity were high levels of soil inorganic nitrogen availability and lower pH compared with other sites.

Some sites with high animal biodiversity, like the Kenyan grassland site, are considered more at risk due to land use and population increase.


'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert  

Related biology news :

1. Mangroves among the most carbon-rich forests in the tropics
2. Stranglers of the tropics -- and beyond
3. Why are vines overtaking the American tropics?
4. Flower power makes tropics cooler, wetter
5. Scripps launches whole genome sequencing study to find root causes of idiopathic diseases
6. Virginia Tech biomedical engineers announce child football helmet study
7. Study identifies molecules used by certain species of seaweed to harm corals
8. UGA study suggests key to avoiding ankle re-injury may be in the hips and knees
9. Genetic study of cave millipedes reveals isolated populations and ancient divergence between species
10. Study shows that new DNA test to identify Down syndrome in pregnancy is ready for clinical use
11. Study shows unexpected effect of climate change on body size for many different species
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
From tropics to poles: Study reveals diversity of life in soils
(Date:6/22/2016)... ANGELES , June 22, 2016 /PRNewswire/ ... identity management and verification solutions, has partnered ... edge software solutions for Visitor Management, Self-Service ... provides products that add functional enhancements ... partnership provides corporations and venues with an ...
(Date:6/21/2016)... British Columbia , June 21, 2016 /PRNewswire/ ... appointed to the new role of principal product ... been named the director of customer development. Both ... NuData,s chief technical officer. The moves reflect NuData,s ... teams in response to high customer demand and ...
(Date:6/16/2016)... 16, 2016 The global ... to reach USD 1.83 billion by 2024, according ... Inc. Technological proliferation and increasing demand in commercial ... to drive the market growth.      ... The development of advanced multimodal techniques for biometric ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... June 27, 2016   Ginkgo Bioworks , a ... engineering, was today awarded as one of the ... the world,s most innovative companies. Ginkgo Bioworks is ... the real world in the nutrition, health and ... directly with customers including Fortune 500 companies to ...
(Date:6/24/2016)... Epic Sciences unveiled a liquid biopsy ... PARP inhibitors by targeting homologous recombination deficiency (HRD) ... test has already been incorporated into numerous clinical ... Over 230 clinical trials are investigating ... PARP, ATM, ATR, DNA-PK and WEE-1. Drugs targeting ...
(Date:6/24/2016)... ... , ... Researchers at the Universita Politecnica delle Marche in Ancona combed medical ... mesothelioma. Their findings are the subject of a new article on the Surviving Mesothelioma ... in the blood, lung fluid or tissue of mesothelioma patients that can help point ...
(Date:6/23/2016)... ... June 23, 2016 , ... UAS LifeSciences, one ... of their brand, UP4™ Probiotics, into Target stores nationwide. The company, which has ... add Target to its list of well-respected retailers. This list includes such fine ...
Breaking Biology Technology: