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• 1. [Article] Aquatic Plant Surveys in the Bureau of Land Management, Medford District, 2010-2011

  The introduction of invasive aquatic plant species (IAPS) can cause significant ecological and economic harm. IAPS can displace native aquatic plant species, impair recreation, and degrade water quality. ...

  Citation × Citation Citation Abstract Copy Title: Aquatic Plant Surveys in the Bureau of Land Management, Medford District, 2010-2011 Author: Sytsma, Mark D., Miller, Rich, Morgan, Vanessa Year: 2011 The introduction of invasive aquatic plant species (IAPS) can cause significant ecological and economic harm. IAPS can displace native aquatic plant species, impair recreation, and degrade water quality. Early detection of new invasions can improve chances for successful eradication or containment to reduce the risk of IAPS spread. The Oregon Department of Agriculture (ODA) lists the most egregious offenders as “Noxious Weeds” which are defined as plants classified by the Oregon State Weed Board that are injurious to public health, agriculture, recreation, wildlife, or any public or private property (ODA 2011). Several IAPS classified as noxious have been detected within the Medford District of the Bureau of Land Management (BLM) in Southern Oregon including yellow floating heart (Nymphoides peltata) and yellow flag iris (Iris pseudacorus). During the summers of 2010 and 2011, IAPS surveys were conducted at selected reservoirs, lakes, and river boat launches within the Medford District to determine the extent of IAPS infestations as well as the distributions of native aquatic plant species. This report summarizes results of the surveys and provides recommendations for management of IAPS within the Medford District. Observations of any invasive aquatic animal species such as New Zealand mudsnails (Potamopyrgus antipodarum) are also reported. Title: Aquatic Plant Surveys in the Bureau of Land Management, Medford District, 2010-2011 Author: Sytsma, Mark D., Miller, Rich, Morgan, Vanessa Year: 2011 The introduction of invasive aquatic plant species (IAPS) can cause significant ecological and economic harm. IAPS can displace native aquatic plant species, impair recreation, and degrade water quality. Early detection of new invasions can improve chances for successful eradication or containment to reduce the risk of IAPS spread. The Oregon Department of Agriculture (ODA) lists the most egregious offenders as “Noxious Weeds” which are defined as plants classified by the Oregon State Weed Board that are injurious to public health, agriculture, recreation, wildlife, or any public or private property (ODA 2011). Several IAPS classified as noxious have been detected within the Medford District of the Bureau of Land Management (BLM) in Southern Oregon including yellow floating heart (Nymphoides peltata) and yellow flag iris (Iris pseudacorus). During the summers of 2010 and 2011, IAPS surveys were conducted at selected reservoirs, lakes, and river boat launches within the Medford District to determine the extent of IAPS infestations as well as the distributions of native aquatic plant species. This report summarizes results of the surveys and provides recommendations for management of IAPS within the Medford District. Observations of any invasive aquatic animal species such as New Zealand mudsnails (Potamopyrgus antipodarum) are also reported. Close

• 2. [Article] OSMB Final Report: Task 5. Zebra and Quagga Mussel Early-Detection Monitoring in High Risk Oregon Waters

  Neither zebra nor quagga mussels (Dreissena polymorpha and D. rostriformis bugensis, respectively) were detected by Portland State University (PSU) during their early detection sampling in Oregon water ...

  Citation × Citation Citation Abstract Copy Title: OSMB Final Report: Task 5. Zebra and Quagga Mussel Early-Detection Monitoring in High Risk Oregon Waters Author: Wells, Steve W., Sytsma, Mark Year: 2014 Neither zebra nor quagga mussels (Dreissena polymorpha and D. rostriformis bugensis, respectively) were detected by Portland State University (PSU) during their early detection sampling in Oregon water bodies during 2013. PSU conducted sampling for planktonic larvae, juvenile, and adult mussels at nine Oregon water bodies during the July to August period coinciding with water temperatures favorable for mussel spawning. A total of 113 plankton samples were collected and over 1.6 million liters of lake water were filtered through 63-μm mesh nets during plankton sample collection. The greatest sampling effort occurred in East Lake, Prineville Reservoir, and Paulina Lake; these water bodies were identified as high risk for both mussel establishment and introduction according to Wells et al. (2009). The sampling effort, however, was fairly uniform amongst the targeted water bodies, and sampling also occurred in Upper Klamath Lake, Howard Prairie Lake, Hyatt Reservoir, Emigrant Lake, Ochoco Reservoir, and Lake Billy Chinook. Non-native invertebrates and macrophytes were opportunistically collected during Dreissena spp. sampling in 2013. Corbicula fluminea (Asian clam) straight-hinge juveniles were collected in plankton samples from East Lake and Howard Prairie Lake. Potamopyrgus antipodarum (New Zealand mud snails) were collected in Lake Billy Chinook. Radix auricularia (big-ear radix) snails were collected in Hyatt Reservoir, Lake Billy Chinook and Paulina Lake. Orconectes neglectus (ringed crayfish) were collected in Hyatt Reservoir. Potamogeton crispus (curly leaf pondweed) were collected in Howard Prairie Lake, Hyatt Reservoir, Lake Billy Chinook, and Upper Klamath Lake. Most of these collections were not the first detections for these species in these locations; however, to the authors’ knowledge, the following represent first detections: R. auricularia in Hyatt Reservoir and Paulina Lake, O. neglectus in Hyatt Reservoir and C. fluminea in Howard Prairie Lake. Title: OSMB Final Report: Task 5. Zebra and Quagga Mussel Early-Detection Monitoring in High Risk Oregon Waters Author: Wells, Steve W., Sytsma, Mark Year: 2014 Neither zebra nor quagga mussels (Dreissena polymorpha and D. rostriformis bugensis, respectively) were detected by Portland State University (PSU) during their early detection sampling in Oregon water bodies during 2013. PSU conducted sampling for planktonic larvae, juvenile, and adult mussels at nine Oregon water bodies during the July to August period coinciding with water temperatures favorable for mussel spawning. A total of 113 plankton samples were collected and over 1.6 million liters of lake water were filtered through 63-μm mesh nets during plankton sample collection. The greatest sampling effort occurred in East Lake, Prineville Reservoir, and Paulina Lake; these water bodies were identified as high risk for both mussel establishment and introduction according to Wells et al. (2009). The sampling effort, however, was fairly uniform amongst the targeted water bodies, and sampling also occurred in Upper Klamath Lake, Howard Prairie Lake, Hyatt Reservoir, Emigrant Lake, Ochoco Reservoir, and Lake Billy Chinook. Non-native invertebrates and macrophytes were opportunistically collected during Dreissena spp. sampling in 2013. Corbicula fluminea (Asian clam) straight-hinge juveniles were collected in plankton samples from East Lake and Howard Prairie Lake. Potamopyrgus antipodarum (New Zealand mud snails) were collected in Lake Billy Chinook. Radix auricularia (big-ear radix) snails were collected in Hyatt Reservoir, Lake Billy Chinook and Paulina Lake. Orconectes neglectus (ringed crayfish) were collected in Hyatt Reservoir. Potamogeton crispus (curly leaf pondweed) were collected in Howard Prairie Lake, Hyatt Reservoir, Lake Billy Chinook, and Upper Klamath Lake. Most of these collections were not the first detections for these species in these locations; however, to the authors’ knowledge, the following represent first detections: R. auricularia in Hyatt Reservoir and Paulina Lake, O. neglectus in Hyatt Reservoir and C. fluminea in Howard Prairie Lake. Close