Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Projets de développement → Projets de recherche pour le Développement → 2022 → DETERMINANTS OF RANGELAND RECOVERY AFTER EXTREME DROUGHT : FOUNDATIONAL UNDERSTANDING OF DROUGHT LEGACIES AND CLIMATE TO INFORM MANAGEMENT

United States Department of Agriculture (USDA) 2022

DETERMINANTS OF RANGELAND RECOVERY AFTER EXTREME DROUGHT : FOUNDATIONAL UNDERSTANDING OF DROUGHT LEGACIES AND CLIMATE TO INFORM MANAGEMENT

Rangeland Drought Recovery

United States Department of Agriculture (USDA) National Institute of Food and Agriculture

Titre : DETERMINANTS OF RANGELAND RECOVERY AFTER EXTREME DROUGHT : FOUNDATIONAL UNDERSTANDING OF DROUGHT LEGACIES AND CLIMATE TO INFORM MANAGEMENT

Identification : 1027649

Pays : Etats Unis

Durée : START : 01 JAN 2022 // TERM : 31 DEC 2025

Résumé
Drought reduces forage and livestock production across some portion of rangelands every year in the US, and more extreme droughts, thosethat last for several years, are expected to become more common in the future. Because recovery of rangelandsafter extreme drought may require many years, understanding what determines how rapidly rangelands recover after drought is necessary to better manage livestock grazing during the recovery period. Our research is focused on understanding drought recovery in the dry grasslands of the central US.To increase our understanding, we will conduct a Drought Recovery Experiment in which we study how alterations in ecosystems during drought affect their recovery after drought. We will also vary rainfall in the years after drought to determine how the climate during recovery affects recovery.Our research meets an important USDAgoal of conducting research that focuses on improvement of ecosystem health and productivity in managed systems that are currently under stress. Overall, we expect to provide new knowledge that isnecessary to manage for healthy US rangelands in the future, particularly in response to more frequent and extremedrought.

Objectifs
Our research is focused on post-drought recovery in the semi-arid shortgrass steppe and is designed to provide the foundational knowledge necessary to sustainably manage for healthy US rangelands in the future. We will conduct a Drought Recovery Experiment, building on an existing 4-yr extreme drought study, to quantify the effects of drought legacies - alterations in ecosystems during drought that affect functioning after drought - on rangeland recovery. Our major goals are : 1) determine how drought legacies affect recovery of forage productivity, carbon cycle processes, and other ecosystem services ; 2) assess how precipitation amount in the years after drought affects recovery, and 3) examine how drought legacies and precipitation amounts influence management decisions to return livestock to these grasslands.

Financement total : $649,672

Performing Institution : COLORADO STATE UNIVERSITY
Investigator : Knapp, A. ; Smith, ME, DI. ; Felton, AN, J.

Présentation : USDA (NIFA)

Page publiée le 23 novembre 2021