Due to federal, state, and local regulations pertaining to clean water and salmon recovery, stream health and water quality are major concerns in the Pacific Northwest of the United States. An integral component of mo...Due to federal, state, and local regulations pertaining to clean water and salmon recovery, stream health and water quality are major concerns in the Pacific Northwest of the United States. An integral component of most riparian rehabilitation efforts is the effective establishment of preferred vegetation. We conducted arthropod surveys in representative disturbed and rehabilitated riparian buffers directly adjacent to apple orchards and grape vineyards in the Lower Yakima Valley near Prosser, Benton County, Washington State USA. Objectives of the study were to determine whether densities of select predatory and pest taxa changed with distance from the waterway and to test whether densities differed among disturbed, rehabilitated, or pristine riparian buffers. The studies suggest that populations of some beneficial arthropods, including spiders and ground beetles, were higher in the presence of exotic flowering plant species. In the riparian environments surveyed, more native woody plant species were found adjacent to the waterway, and this apparent stability appears to have had a positive effect on beneficial arthropods. Concurrently, data indicated that some exotic, flowering species of plants may be preferred over native plant species as hosts to certain arthropod pests. These plants tend to persist in degraded riparian buffers and at the interface of riparian habitats and cultivated areas, whereas native plant species are predominant in pristine or properly maintained and rehabilitated buffers.展开更多
基金The authors would like thank S. Schveilbein and R. Wight for technical assistance G. Reisenauer and R. Aldridge for statistical assistance+2 种基金 B. Parker for plant identification assistance C. Looney for arthropod identification assistance and S. O＇Neal for editorial feedback. The authors are grateful to Olson Brothers Inc. for the use of their property. The authors would like to acknowledge the National Science Foundation Center for Integrated Pest Management, The Washington State Tree Fruit Research Commission, and the Washington State Commission on Pesticide Registration for financial support.
文摘Due to federal, state, and local regulations pertaining to clean water and salmon recovery, stream health and water quality are major concerns in the Pacific Northwest of the United States. An integral component of most riparian rehabilitation efforts is the effective establishment of preferred vegetation. We conducted arthropod surveys in representative disturbed and rehabilitated riparian buffers directly adjacent to apple orchards and grape vineyards in the Lower Yakima Valley near Prosser, Benton County, Washington State USA. Objectives of the study were to determine whether densities of select predatory and pest taxa changed with distance from the waterway and to test whether densities differed among disturbed, rehabilitated, or pristine riparian buffers. The studies suggest that populations of some beneficial arthropods, including spiders and ground beetles, were higher in the presence of exotic flowering plant species. In the riparian environments surveyed, more native woody plant species were found adjacent to the waterway, and this apparent stability appears to have had a positive effect on beneficial arthropods. Concurrently, data indicated that some exotic, flowering species of plants may be preferred over native plant species as hosts to certain arthropod pests. These plants tend to persist in degraded riparian buffers and at the interface of riparian habitats and cultivated areas, whereas native plant species are predominant in pristine or properly maintained and rehabilitated buffers.
