Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


The forest, its biodiversity, and human intrusion

The forest is managed and used by humans to produce energy, build, regulate certain ecological processes (floods, erosion), provide recreational areas, etc.

It is also an important reservoir for biological diversity, a key element in tomorrow’s forest productivity. Cemagref’s “Forest, nature, and biodiversity” project, conducted as part of a partnership with the National Forestry Office (Office National des Forêts; ONF) and the Nature Reserves of France (Réserves Naturelles de France; RNF), aims to compare the biodiversity of harvested and unharvested forests to determine the response of biodiversity to forest harvesting. This approach, hitherto unheard of in France, should provide tools to better manage forest resources.

On the gene, species, or ecosystem scale, biological diversity is one of the factors the forest ecosystem uses to adapt to constricting global changes, particularly climate changes. While in this sense it can condition the very perpetuity of the forest, biodiversity can be profoundly modified by how the forest is managed. Notably because of the reduction in the quantity and quality of dead wood in harvested zones, 20%–40% of forest life forms dependent on this dead wood are today threatened with extinction in several European countries. In France, with a forest cover of 15.3 million hectares (27.1% of the land surface), forest bird populations may have diminished by 18% between 1989 and 2004.

- Establishing a “zero condition” for forest biodiversity in harvested forests

Taking biological diversity into account in sectorial policies and management choices is a priority outlined in the Convention on Biological Diversity, ratified by France in 1994. However, the tools and data necessary to quantify the impact of forest harvesting on biodiversity have not been sufficiently developed to date, especially given the high stakes involved. To offset this deficiency and test the relevant indicators, Cemagref scientists in Nogent-sur-Vernisson are developing a statistical approach based on field data measuring the response of the biodiversity in seven different groups of species (animals, plants, fungi) to forest harvesting. Conducted in collaboration with the ONF and the RNFs, the study compares harvested and unharvested zones:
- untouched by any human intervention for at least 20 years 1
- belonging to the same forest areas in metropolitan France, located in both the lowlands and the mountains. This project is a first in France, where there has been no comparative study of this size since the 1960s.

Within the Auberive-Chalmessin (Haute-Marne), Fontainebleau (Seine et Marne), and Ventron (Haut-Rhin) forest areas, 61 sample plots were chosen in spring 2008, then described in detail (quantity of dead wood, species composition, tree stand size, etc.). The inventory and analysis of the flora and fauna are continuing today, so that a true “zero condition” of biodiversity can be established by comparing harvested zones with those that have evolved naturally in each forest area. The moss, mushroom, vascular plant, insect, bird, and bat species are being inventoried by networks of naturalists from the ONF and the RNF as well as by Cemagref’s scientists. The field data will then be processed statistically and modeled. This work on the three forest areas forms a pilot project designed to validate the work methods. In the near future, Cemagref, the ONF and the RNF hope to extend this inventory to 20 forest areas and enlarge the project’s scientific partnerships.

- Indicators of the response to disturbances

By the end of the project, the comparison of harvested and unharvested forests should make it possible to identify the factor(s) that can best explain the variations in biodiversity observed: the harvesting itself, the structure of the forest stand, the quantity of dead wood (presence of cavities, microhabitats), and the characteristics of unharvested forests. The project therefore aims to test the relevance of the different indicators of sustainable forest management to determine the proportion of biodiversity that these indicators represent most faithfully, including the optimal intensity levels and management conditions. Integrating unharvested forests into the project will make it possible to demonstrate the effect of factors that could not have been considered in an analysis limited only to harvested forests.

Marie Signoret | alfa
Further information:

More articles from Ecology, The Environment and Conservation:

nachricht Invasive Insects Cost the World Billions Per Year
04.10.2016 | University of Adelaide

nachricht Malaysia's unique freshwater mussels in danger
27.09.2016 | The University of Nottingham Malaysia Campus

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: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Greater Range and Longer Lifetime

26.10.2016 | Power and Electrical Engineering

VDI presents International Bionic Award of the Schauenburg Foundation

26.10.2016 | Awards Funding

3-D-printed magnets

26.10.2016 | Power and Electrical Engineering

More VideoLinks >>>