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Aquatic Invasive Plant Surveys in the BLM Medford District During 2012
Center for Lakes and Reservoirs Publications and Presentations
  • Rich Miller, Portland State University
  • Vanessa Morgan, Portland State University
  • Mark D. Sytsma, Portland State University
Document Type
Report
Publication Date
4-1-2013
Subjects
  • Invasive species,
  • Aquatic ecology -- Research -- United States,
  • Environmental monitoring -- Pacific Northwest
Abstract
Aquatic plant surveys were conducted at 22 waterbodies located within the Bureau of Land Management’s Medford District during the summer of 2012. Sites included eleven lakes, ponds or reservoirs and six reaches along the Rogue and Applegate Rivers. Five sampling areas surveyed during 2010 and 2011 were revisited to determine the extent of known non-native species infestations, positively identify rare species, or verify the absence of an expected non-native species. Plant specimens were collected at up to 50 sites at each waterbody using plant rakes or by observation. The non-native submersed species curly leaf pondweed (Potamogeton crispus) and Eurasian x northern watermilfoil (Myriophyllum sibiricum x spicatum) were widespread throughout the District. Eurasian watermilfoil (Myriophyllum spicatum) was present at two sites. Emergent non-native aquatic species included parrotsfeather (Myriophyllum aquaticum), yellow flag iris (Iris pseudacorus), purple loosestrife (Lythrum salicaria), reed canary grass (Phalaris arundinaceae), floating primrose-willow (Ludwigia peploides) and slender waternymph (Najas gracillima).
Description

Report to the Bureau of Land Management

Persistent Identifier
http://archives.pdx.edu/ds/psu/16276
Citation Information
Rich Miller, Vanessa Morgan and Mark D. Sytsma. "Aquatic Invasive Plant Surveys in the BLM Medford District During 2012" (2013)
Available at: http://works.bepress.com/mark_sytsma/60/