Navigation Links
Live fast, die young true for forests too

Trees in the world¹s most productive forests -- forests that add the most new growth each year -- also tend to die young, according to a U.S. Geological Survey (USGS) study published in a recent issue of the journal Ecology Letters. This discovery could help scientists predict how forests will respond to ongoing and future environmental changes.

"One implication of this fast turnover rate is that the world¹s most productive forests may be those likely to respond most quickly to such things as climatic change," said Nate Stephenson, a USGS research ecologist in Three Rivers, Calif., and lead author of the article.

"You can view a forest like a bank account," said Stephenson. "As long as deposits and withdrawals are similar, your balance remains stable. But if the deposits or withdrawals are disrupted, the balance changes."

In productive forests, such as tropical forests growing on rich soils, the rates of both "deposits" (tree births) and "withdrawals" (tree deaths) are high. But if tree births suddenly stopped, or if tree death rates doubled, the numbers of trees in these forests would be halved in just 30 years.

In contrast, said Stephenson, in less productive forests, such as coniferous forests growing at high latitudes, the same changes could take more than a century to occur.

Another implication of the study is that environmental changes considered beneficial to forests may bring about unexpected forest changes. "Most attention so far has been given to things that stress forests, like increased drought," said USGS scientist Phil van Mantgem, the study's co-author.

"Less attention has been given to the consequences of changes that can increase forest vigor or productivity, like increased rainfall."

Environmental changes that increase productivity of a given forest could lead to more rapid turnover of trees, decreasing the average age of trees. In the long run, such changes might affect wildlife populations th at prefer younger or older forests, said van Mantgem.

Stephenson and van Mantgem pointed out that increased dominance by younger trees could also lead to changes in the amount of carbon stored in forests, though the direction and magnitude of such potential changes are currently unknown and require more research. Atmospheric carbon dioxide, a heat-trapping gas implicated in climatic warming, increases as carbon storage in forests decreases, and decreases as carbon storage in forests increases. Information regarding such potential changes is therefore needed to reduce uncertainties in predicting future climatic changes.


'"/>

Source:United States Geological Survey


Related biology news :

1. Second messenger NAADP shows fast, dose-related impact on satiety cycle
2. High rates of sexually transmitted infections found in young drug users
3. Sharp older brains are not the same as younger brains
4. For some young fish, early gene expression is a clear harbinger of fated lifestyle
5. Thinner and younger
6. Even fish dont swim well when theyre young!
7. Life and death in the hippocampus: what young neurons need to survive
8. Wild meerkats school their young
9. PET imaging shows young smokers quick benefit of quitting
10. In young mice, gregariousness seems to reside in the genes
11. U.N. mulls the protection of Earths forests
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/3/2017)... , Feb. 3, 2017 A new ... Identity Strategy Partners, LLP (IdSP) . Designed to fill ... the complex identity market, founding partners Mark Crego ... 35 combined years just in identity expertise that span ... and non-profit leadership. The Crego-Kephart combined expertise has a ...
(Date:2/1/2017)... 2017 IDTechEx Research, a leading provider of ... the availability of a new report, Sensors for Robotics: Technologies, ... Reading ... ... Source: IDTechEx Report "Sensors for Robotics: Technologies, Markets and Forecasts 2017-2027: ...
(Date:1/26/2017)... -- Acuity Market Intelligence today released the 2017 "Ten ... characterizes 2017 as a "breakout" year for biometrics ... new understanding of the potential benefits these technologies ... are often perceived as threats to privacy and ... Acuity Market intelligence. "However, taken together these technologies ...
Breaking Biology News(10 mins):
(Date:2/24/2017)... NY (PRWEB) , ... February 24, 2017 , ... FireflySci, ... Founded in late 2014, FireflySci had the goal of bringing their powerful ... goal continues to shape the path that FireflySci is going on as they add ...
(Date:2/24/2017)... 2017  OncoSec Medical Incorporated ("OncoSec") (NASDAQ: ONCS), a ... Key Opinion Leader event to highlight new clinical data ... presentation at the upcoming 2017 ASCO-SITC Immuno-Oncology Symposium and ... be held in-person and via live webcast on Tuesday, ... PST at the Lotte New York Palace Hotel in ...
(Date:2/23/2017)... ... 2017 , ... BellBrook Labs is formalizing a significant expansion ... biochemical analyses critical for Lead Discovery. The company’s Lead Discovery Services will ... inhibitor potency and selectivity, mechanism of action, and inhibitor residence times on drug ...
(Date:2/23/2017)... -- In Atlanta, it seems everyone has a chance to express ... an expressive and dynamic community unlike any other. The businesses ... it. With their newest salon in ... carry on that tradition with a unique, fresh approach to ... is the newest of 13 nationwide locations, each of them ...
Breaking Biology Technology: