Know more

About cookies

What is a "cookie"?

A "cookie" is a piece of information, usually small and identified by a name, which may be sent to your browser by a website you are visiting. Your web browser will store it for a period of time, and send it back to the web server each time you log on again.

Different types of cookies are placed on the sites:

  • Cookies strictly necessary for the proper functioning of the site
  • Cookies deposited by third party sites to improve the interactivity of the site, to collect statistics

Learn more about cookies and how they work

The different types of cookies used on this site

Cookies strictly necessary for the site to function

These cookies allow the main services of the site to function optimally. You can technically block them using your browser settings but your experience on the site may be degraded.

Furthermore, you have the possibility of opposing the use of audience measurement tracers strictly necessary for the functioning and current administration of the website in the cookie management window accessible via the link located in the footer of the site.

Technical cookies

Name of the cookie

Purpose

Shelf life

CAS and PHP session cookies

Login credentials, session security

Session

Tarteaucitron

Saving your cookie consent choices

12 months

Audience measurement cookies (AT Internet)

Name of the cookie

Purpose

Shelf life

atid

Trace the visitor's route in order to establish visit statistics.

13 months

atuserid

Store the anonymous ID of the visitor who starts the first time he visits the site

13 months

atidvisitor

Identify the numbers (unique identifiers of a site) seen by the visitor and store the visitor's identifiers.

13 months

About the AT Internet audience measurement tool :

AT Internet's audience measurement tool Analytics is deployed on this site in order to obtain information on visitors' navigation and to improve its use.

The French data protection authority (CNIL) has granted an exemption to AT Internet's Web Analytics cookie. This tool is thus exempt from the collection of the Internet user's consent with regard to the deposit of analytics cookies. However, you can refuse the deposit of these cookies via the cookie management panel.

Good to know:

  • The data collected are not cross-checked with other processing operations
  • The deposited cookie is only used to produce anonymous statistics
  • The cookie does not allow the user's navigation on other sites to be tracked.

Third party cookies to improve the interactivity of the site

This site relies on certain services provided by third parties which allow :

  • to offer interactive content;
  • improve usability and facilitate the sharing of content on social networks;
  • view videos and animated presentations directly on our website;
  • protect form entries from robots;
  • monitor the performance of the site.

These third parties will collect and use your browsing data for their own purposes.

How to accept or reject cookies

When you start browsing an eZpublish site, the appearance of the "cookies" banner allows you to accept or refuse all the cookies we use. This banner will be displayed as long as you have not made a choice, even if you are browsing on another page of the site.

You can change your choices at any time by clicking on the "Cookie Management" link.

You can manage these cookies in your browser. Here are the procedures to follow: Firefox; Chrome; Explorer; Safari; Opera

For more information about the cookies we use, you can contact INRAE's Data Protection Officer by email at cil-dpo@inrae.fr or by post at :

INRAE

24, chemin de Borde Rouge -Auzeville - CS52627 31326 Castanet Tolosan cedex - France

Last update: May 2021

Menu Logo TULIP Nouveau bandeau tutelles EN

Home

Habitat loss can destabilize ecosystems

Habitat loss can destabilize ecosystems
A new international study published on May 24 in Nature Communications shows the consequences for biodiversity of the loss of natural habitats. The study led by researchers from the SETE (UMR CNRS/UPS) suggests that biological communities respond to the destruction of their habitats prior to species extinctions. It shows that the way human activities destroy habitat for biodiversity is a key factor to understanding the effects of that loss on the stability and functioning of biological communities.

This study poses the question of whether putting the focus solely on species diversity may overlook other aspects related to the responses of biological communities.

Daniel Montoya, researcher at the Theoretical and Experimental Ecology Station in Moulis, France, and leader of this study, explained to us: “Human actions challenge nature in many ways. Ecologists and practitioners tend to assess the impact of human activities on biodiversity only by measuring the extinction rates of species. However, biodiversity comprises elements other than single species, such as the interactions among species and their stability over time and space.”

“These additional, sometimes overlooked properties are key for the functioning of ecosystems”, he added. “They are the missed component of biodiversity loss that accompanies or precede species extinctions”.

Interactions between species are lost faster than the species themselves

Despite biodiversity changes beyond species extinctions being previously reported, the authors of this study did not expect the substantial changes that habitat loss imposes on the stability of natural communities. Their results support theoretical and empirical findings showing that interactions among species are lost faster than the species themselves. In addition, they suggest that habitat loss affects the stability of biological communities, that is, the temporal and spatial variability of population biomasses. The magnitude of these responses is mediated by changes in how dominant species interact with each other within the remaining habitat.

This study also found that the way habitat is lost is key for the response of biodiversity. Natural habitats can be destroyed randomly or in a clustered way – for example, by the construction of a road or the creation of new urban areas. The spatial configuration of the loss differentially constraints the mobility of individual animals, which further impacts biodiversity and the stability of populations in the remaining fragments of intact habitat. This leads them to question the way habitat is destroyed in real landscapes around the world. The authors showed that it depends on the spatial scale we are looking at. They explored several scenarios of habitat loss and their results suggests that community responses are approximately gradual and predictable.

This study also relates with recent research exploring changes in local diversity fostered by global change, currently under a hot debate. “We suggest that, irrespective of a positive, negative or neutral change in local diversity, the spatial pattern of habitat loss largely influences the structure and dynamics of biodiversity in very different, contrasting way” said M. Lurgi (Swansea University, U.K), co-author in the study.

Finally, these results can help environmental science and policy maker. The researchers suggests that conservation efforts focusing on alleviating the effects of natural habitat loss would benefit from including several aspects of community structure and stability, in addition to species persistence, into assessment and management plans, and urge for the integration of the type of spatial configuration of habitat loss into conservation planning, as it can strongly determine the response of communities.

See also

Chris McWilliams, Miguel Lurgi, Jose M. Montoya, Alix Sauve, and Daniel Montoya. The Stability of Multitrophic Communities under Habitat Loss. Nature Communications, online publication: 24-MAY-2019, DOI: 10.1038/s41467-019-10370-2.

Note: Daniel Montoya is available for additional comment in Spanish, French or English at: (+33) (0)6 73 36 04 87 or daniel.montoya@sete.cnrs.fr