HOME >> BIOLOGY >> NEWS
Tropical tree distribution could have implications for forest management, conservation

The sheer diversity of tropical forests -- where 130 acres can contain as many as 1,100 tree species and 366,000 individual trees -- has long clouded the basic ecological question of whether tropical trees of the same species are "aggregated" or dispersed randomly across the landscape. A census of six large plots of 25 to 52 hectares (60 to 130 acres) in five South American and Asian countries is described in this week's Science and shows most tropical trees are aggregated, or clumped. The size of the data set should help end decades of debate on this subject, according to Patrick Baker, co-author and doctoral student at the University of Washington's College of Forest Resources.

The findings have implications for environmental decision-makers interested in such things as designing nature reserves, selecting native trees to reforest degraded areas and determining biologically sustainable harvest rates for timber, Baker says, "provided researchers can next determine if there are key mechanisms that drive these patterns."

The notion that species were widely dispersed dominated theoretical tropical ecology from 1853 until 1979 when Stephen Hubbell, another co-author on this week's Science paper, published results contrary to popular wisdom based on work at a 13-hectare plot in Costa Rica. Hubbell's results have been the subject of debate since then.

Much larger plots from Panama, Malaysia, Thailand, India and Sri Lanka have now been surveyed in work funded mainly by the National Science Foundation and the MacArthur Foundation, and coordinated through the Center for Tropical Forest Science, a part of the Smithsonian Tropical Research Institute.

Nearly every species was aggregated when scientists considered trees of 1 cm or more in diameter, according to calculations by the paper's lead author Richard Condit of the Center for Tropical Forest Science. Rare species were substantially more aggregated than common species at all but one site. Clumping
'"/>

Contact: Sandra Hines
shines@u.washington.edu
206-543-2580
University of Washington
24-May-2000


Page: 1 2

Related biology news :

1. Tropical legume could be alternative hay/forage crop for Texas
2. Tropical deforestation and global warming
3. Arthropods of Tropical Forests
4. Tropical Science for the 21st Century
5. A Magic Web: The Tropical Forest of Barro Colorado
6. Ira Rubinoff honored by the Association for Tropical Biology
7. Tropical forests under surveillance
8. Tropical scientists find fewer species than expected
9. Sessions on bioterrorism featured at Tropical Medicine Meeting
10. Tropical glaciers formed while earth was giant snowball
11. Chemistry in the Amazon: Tropical birds, Amazonian tribespeople derive medicinal benefits from insects, plants

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


(Date:6/3/2016)... 3, 2016 Das ... Nepal hat ein 44 ... geprägter Kennzeichen, einschließlich Personalisierung, Registrierung und IT-Infrastruktur, ... Produktion und Implementierung von Identitätsmanagementlösungen. Zahlreiche renommierte ... Januar teilgenommen, aber Decatur wurde als konformste ...
(Date:6/2/2016)... -- Perimeter Surveillance & Detection Systems, Biometrics ... Support & Other Service  The latest report ... analysis of the global Border Security market . ... $17.98 billion in 2016. Now: In November ... software and hardware technologies for advanced video surveillance. ...
(Date:5/20/2016)... , May 20, 2016  VoiceIt is ... partnership with VoicePass. By working together, ... experience.  Because VoiceIt and VoicePass take slightly different ... engines increases both security and usability. ... excitement about this new partnership. "This ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... UAS ... the launch of their brand, UP4™ Probiotics, into Target stores nationwide. The company, ... proud to add Target to its list of well-respected retailers. This list includes ...
(Date:6/23/2016)... -- Houston Methodist Willowbrook Hospital has signed a ... serve as their official health care provider. As ... provide sponsorship support, athletic training services, and most ... athletes and families. "We are excited ... to bring Houston Methodist quality services and programs ...
(Date:6/23/2016)... 2016   EpiBiome , a precision microbiome engineering ... debt financing from Silicon Valley Bank (SVB). The financing ... advance its drug development efforts, as well as purchase ... "SVB has been an incredible strategic partner to us ... bank would provide," said Dr. Aeron Tynes Hammack ...
(Date:6/23/2016)... , June 23, 2016 Apellis ... Phase 1 clinical trials of its complement C3 ... single and multiple ascending dose studies designed to ... (PD) of subcutaneous injection in healthy adult volunteers. ... (SC) either as a single dose (ranging from ...
Breaking Biology Technology:
Cached News: