Accession Number : ADA436874


Title :   Exotic Annual Grasses in Western Rangelands: Predicting Resistance and Resilience of Native Ecosystems to Invasion (Draft)


Descriptive Note : Final technical rept.


Corporate Author : GEOLOGICAL SURVEY RESTON VA


Personal Author(s) : Belnap, Jayne ; Evans, R D ; Phillips, Susan L ; Reheis, Merith ; Reynolds, Rich ; Sanford, Robert ; Webb, Bruce


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a436874.pdf


Report Date : 22 Apr 2004


Pagination or Media Count : 236


Abstract : Bromus tectorum (hereafter referred to as Bromus) is a non-native annual grass from the Mediterranean region that arrived in the United States in the late 19th century and soon spread throughout the western states. Bromus now dominates millions of hectares of low- and mid-elevation landscapes. Where this occurs, native plant and animal diversity is reduced and sometimes extirpated, fire frequencies are increased, community productivity is decreased, and soil biota and nutrient cycles are altered. This has led to many research efforts to understand the impact of Bromus on native ecosystems and to identify ways to prevent invasion and/or to restore invaded landscapes.


Descriptors :   *PREDICTIONS , *RESISTANCE , *ECOSYSTEMS , *RESILIENCE , *GRASSES , TABLES(DATA) , FIRE SAFETY , SOIL SCIENCE


Subject Categories : Environmental Health and Safety
      Soil Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE