desertification; nonlinear dynamics; threshold behavior; cross-scale interactions; cascading events; ecosystem indicators and vegetation dynamics; geomorphology and wind; ecohydrology; animal interactions; factors affecting primary production; animal-induced soil disturbances; direct and indirect consumer effects; vertebrate and invertebrate population dynamics; grazing effects on ecosystem structure and function; biodiversity and ecosystem
The overall goal of the Jornada Basin LTER (JRN) program is to quantify the key factors and processes that control ecosystem dynamics and biotic patterns in Chihuahuan Desert landscapes. These landscapes are representative of many arid and semiarid ecosystems of the world where dramatic changes in vegetation structure and ecosystem processes have occurred over the past several centuries. These changes in ecosystem state are often interpreted as “desertification”, the broad-scale conversion of perennial grasslands to dominance by xerophytic woody plants and the associated loss of soils and biological resources, including biodiversity. The JRN LTER has been investigating desertification processes since 1982. Significant advances in understanding the causes and consequences of desertification have been made at specific spatial scales and for certain environmental conditions.
The Jornada Basin Long Term Ecological Research Program (JRN LTER) has been investigating desertification processes since 1982. Significant progress has been made in understanding the causes and consequences of desertification, although key questions remain unresolved, including (1) How do we integrate diverse observations about flora, fauna, soils, hydrology, climate, and human populations across spatial and temporal scales to improve our ability to understand current and historic patterns and dynamics? (2) How do processes interact across a range of scales and under different conditions to drive desertification dynamics and constrain the conservation of biological resources? (3) How can we use knowledge of desertification dynamics to more effectively promote the conservation of biological resources and the recovery of grasslands? This integration is the focus of current LTER studies.