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

Summary: Plant-animal interactions affecting plant establishment
and persistence on revegetated rangeland
The role of ungulate grazing in shaping rangeland ecosystems is
well known relative to other important plant-animal interactions
such as pollination, seed dispersal, granivory, and belowground
herbivory. Successful rangeland revegetation may be enhanced by
strategies that favor certain groups of animals and discourage
others. Many perennial forbs and shrubs require animals for suc-
cessful pollination, reproduction, and subsequent maintenance of
species on a site; however, pollination biology of many rangeland
plants and pollinator abundances at potential revegetation sites are
largely unknown. Granivory may be significant in some locations
and planning and design of revegetation areas may be improved by
implementing principles of seed escape mechanisms, such as preda-
tor satiation, seed escape in space (low perimeter-to-area ratio for
revegetation site), and seed escape in time (synchronous or stag-
gered timing for nearby revegetation sites). Seedling establishment
may be associated with invertebrate population levels which need


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


Collections: Environmental Sciences and Ecology