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Plant-plant interactions affecting plant establishment and persistence on revegetated rangeland
 

Summary: Plant-plant interactions affecting plant establishment and
persistence on revegetated rangeland
DAVID A. PYKE AND STEVE ARCHER
Abstract
Restoration and revegetattion of rangeland ecosystems is based
on knowledge of abiotic and biotic interactions that affect plant
establishment.Onceplants becomeautotropbic,interactionswithin
and between plant species may occur and these interactions may
range from antagonistic to mutualistic. This fullrangeof potential
interactions needs to be considered to ensure successful revegeta-
tion. At the intraspecificlevel,we propose the development and use
of density-yield diagrams for rangeland species. These diagrams
would be based on the self-thinning principle, that aboveground
biomass is related to plant density and to the dynamic process of
density-dependent mortality. The proposed approach would be
used to determine optimum seeding rates, and to predict future
biomass of revegetated rangeland. At the interspecificlevel, com-
petitive relationships of species used to reseedrangelands need to
be identif@l to enhance the probability that species will coexist
and thereby facilitate greaterspecies diversity on the site. A diver-

  

Source: Archer, Steven R. - Savanna/Woodland Ecology Lab., School of Natural Resources and the Environment, University of Arizona

 

Collections: Environmental Sciences and Ecology