The challenge of managing key supporting ecosystem services in complex land tenure/land use systems-the C cycle in Mexican semiarid grasslands

摘要：

Introduction The grassland biome covers 20％ of the arid/semiarid region in Northern Mexico.Bouteloua gracilis is a keystone species with respect to providing key ecosystem services of these grasslands.Most grassland occurs on communal land,which lacks sustainable livestock management causing severe plant cover reduction and soil erosion,in turn jeopardizes the cycling of nutrients and water,i.e.critical supporting ecosystem services responsible for the functioning of the natural and human systems of this region.Seventy percent of primary productivity is allocated belowground,thus grassland soils represent significant carbon (C) stores.The C storage is important both in the local context for the functioning of the production systems of subsistence small houshold communities and in the global context for regulating the global climate system.

关键词： overgrazing soil carbon dry land development paradigm

作者: Elisabeth Huber-Sannwald Tulio A rredondo Moreno JosuéDelgado Balbuena Monica Ribeiro Palacios

作者单位: Instituto Potosino de Investigacion Cientificay Tecnologica,Caminoala Presa San Jose 2055,Col.Lomas 4ta Seccion,San Luis Potosi,S.L.P.,Mexico

会议类型: 国际会议

会议名称: 2008世界草地与草原大会

会议地点: 呼和浩特

会议语种:英文

在线出版日期: 2008-06-29（万方平台首次上网日期，不代表论文的发表时间）