Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Old growth forest must no longer be ignored in carbon balances

15.09.2008
An international study involving a team from LSCE (CNRS-CEA-UVSQ) has revealed that ancient forests, which accumulate large quantities of carbon over the centuries, should be taken into account in global carbon balance assessments.

However, such old growth forests were not included in the Kyoto protocol. The results of this study are published in the 11 September 2008 edition of Nature.

In the carbon cycle, forests help to slow down the build-up of atmospheric carbon dioxide by absorbing this gas, thereby mitigating climate change. Specifically, forests use CO2 to synthesise the organic molecules that are stored in trees, and thereafter in organic soil matter and dead leaves, which decompose slowly. The ability of forests to fix carbon dioxide depends on the balance between the amounts removed from the atmosphere through photosynthesis and those released as a result of plant respiration.

In the late 1960's, an American scientist named Eugene Odum put forward the hypothesis that the carbon dioxide fixing and release rates in old growth forests, (i.e. woodland more than 150 years old) reached an equilibrium, rendering them neutral from a carbon balance perspective. Although little empirical evidence was produced in support of this hypothesis, it was nonetheless accepted by the vast majority of ecologists and "non-ecologists" alike. As a result, old growth forests were disregarded in the Kyoto protocol.

An international research team that includeds scientists from CEA's Laboratory of Climate and Environmental Science (LSCE - Laboratoire des Sciences du Climat et de l'Environnement) has compiled a new database using measurements made by the "CarboEurope" and "AmeriFlux" observatory networks, with the aim of accurately assessing Odum's hypothesis. "Old growth forests may actually still be accumulating carbon, in defiance of Odum's equilibrium hypothesis, explains Philippe Ciais, Deputy Director of LSCE, and co-author of the study.

More than 30% of the planet's total forested area is unmanaged primary forest, half of which is located in temperate regions in the northern hemisphere. The database established for this study reveals that these ancient forests fix between 0.8 and 1.8 billion tonnes of carbon each year, and that 15% of the total forest area that has until now been totally ignored in carbon balances is in fact responsible for at least 10% of all carbon sinking activity."

The study finds that ancient forests accumulate large quantities of carbon over the centuries, which might be released in case of accidental disturbance (e.g. fire, insects, disease, storms, extreme droughts, etc.). In conclusion, carbon balance assessments should take these old growth forests into account.

Julien Guillaume | alfa
Further information:
http://www.cnrs.fr

More articles from Ecology, The Environment and Conservation:

nachricht Bioinvasion on the rise
15.02.2017 | Universität Konstanz

nachricht Litter Levels in the Depths of the Arctic are On the Rise
10.02.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Impacts of mass coral die-off on Indian Ocean reefs revealed

21.02.2017 | Earth Sciences

Novel breast tomosynthesis technique reduces screening recall rate

21.02.2017 | Medical Engineering

Use your Voice – and Smart Homes will “LISTEN”

21.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>