planeteviable.org 的前十大競爭對手

co2solidaire.org

Utilisez le Calculateur CO2 de CO2Solidaire pour calculer vos émissions carbone et les compenser en soutenant des projets solidaires.

cieau.com

RV le 5 décembre pour l’événement organisé par la @FP2E avec le concours du @Centre d’information sur l’eau

ceped.org

un laboratoire pluridisciplinaire de recherche au Sud et de formation au Nord et au Sud

idrc.ca

Get in touch, we’d love to hear from you! Please note that we do not accept or review unsolicited requests for funding. For information about our funding process or how to apply, please see our Funding page. For contact information and guidelines about application procedures, please see the specific announcements.

iaea.org

More than 3000 participants registered for the Agency’s 69th general conference in Vienna this week, with 10,500 people joining online. The conference decides the direction of the IAEA’s work for the coming year, as it seeks to promote peace, health and prosperity worldwide. Water was the focus of the Scientific Forum and highlighted how by studying water at an atomic level, we can better manage our global water resources for future generations. During the conference, the Director General also opened a new Visitor Centre at the IAEA’s laboratories in Lower Austria.

tel.archives-ouvertes.fr

Increasing drought caused by the ongoing climate change, and forest management by thinning that aims at mitigating its impact, may modify the current relationships between forest functions and drought intensity and preclude our ability to forecast future ecosystem responses. We used 15 yr of data from an experimental rainfall exclusion (−27% of rainfall) combined with thinning (−30% stand basal area) to investigate differences in the drought–function relationships for each component of above-ground net primary productivity (ANPP) and stand transpiration in a Mediterranean Quercus ilex stand. Rainfall exclusion reduced stand ANPP by 10%, mainly because of lowered leaf and acorn production, whereas wood production remained unaffected. These responses were consistent with the temporal sensitivity to drought among tree organs but revealed an increased allocation to wood. Thinning increased wood and acorn production and reduced the sensitivity of standing wood biomass change to drought. Rainfall exclusion and thinning lowered the intercept of the transpiration–drought relationship as a result of the structural constraints exerted by lower leaf and sapwood area. The results suggest that historical drought–function relationships can be used to infer future drought impacts on stand ANPP but not on water fluxes. Thinning can mitigate drought effects and reduce forest sensitivity to drought.