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• 1. [Article] Predator Exclosures, Predator Removal, and Habitat Improvement Increase Nest Success of Snowy Plovers in Oregon, USA

  Management to increase reproductive success is commonly used to aid recovery of threatened and endangered species. The Western Snowy Plover (Charadrius nivosus nivosus) breeds from coastal Washington, ...

  Citation × Citation Citation Abstract Copy Title: Predator Exclosures, Predator Removal, and Habitat Improvement Increase Nest Success of Snowy Plovers in Oregon, USA Author: Dinsmore, Stephen J., Lauten, David J., Castelein, Kathleen J., Gaines, Eleanor P., Stern, Mark A. Year: 2014 Management to increase reproductive success is commonly used to aid recovery of threatened and endangered species. The Western Snowy Plover (Charadrius nivosus nivosus) breeds from coastal Washington, USA, to Baja California, Mexico, and in disjunct interior sites. The Pacific coast population is federally listed as Threatened; habitat loss and nest loss to a suite of terrestrial and avian predators are thought to be primary factors limiting population growth in this species. In coastal Oregon, USA, a consortium of state and federal management agencies deployed nest exclosures on active Snowy Plover nests, initiated a lethal predator management program, and conducted local-scale habitat management in an effort to boost local productivity. During 1990–2009, we monitored 1,951 Snowy Plover nests at 9 sites with varying treatments. We examined the effectiveness of 3 types of nest exclosures (large, small, and outfitted with electric wire), predator removal, and habitat management on nest survival. Habitat management to remove invasive grasses and provide more suitable nesting substrate more than doubled nest survival. Predator management or use of any of the 3 types of exclosures also affected nest survival. There appeared to be no additional benefit to using both approaches, but the biological relevance of these findings is unclear because of site differences in treatments applied. Importantly, these management techniques only affected nesting success; their effect on other contributions to population viability (e.g., fledging success) was not correlated with nesting success. This long-term study illustrates the short-term benefits and tradeoffs of using nest exclosures, predator management, and habitat restoration to improve nesting success. Although we gained broader insight into the relative efficacy of common management techniques to improve avian nesting success, we cannot yet determine how improved nest success contributes to population growth. Title: Predator Exclosures, Predator Removal, and Habitat Improvement Increase Nest Success of Snowy Plovers in Oregon, USA Author: Dinsmore, Stephen J., Lauten, David J., Castelein, Kathleen J., Gaines, Eleanor P., Stern, Mark A. Year: 2014 Management to increase reproductive success is commonly used to aid recovery of threatened and endangered species. The Western Snowy Plover (Charadrius nivosus nivosus) breeds from coastal Washington, USA, to Baja California, Mexico, and in disjunct interior sites. The Pacific coast population is federally listed as Threatened; habitat loss and nest loss to a suite of terrestrial and avian predators are thought to be primary factors limiting population growth in this species. In coastal Oregon, USA, a consortium of state and federal management agencies deployed nest exclosures on active Snowy Plover nests, initiated a lethal predator management program, and conducted local-scale habitat management in an effort to boost local productivity. During 1990–2009, we monitored 1,951 Snowy Plover nests at 9 sites with varying treatments. We examined the effectiveness of 3 types of nest exclosures (large, small, and outfitted with electric wire), predator removal, and habitat management on nest survival. Habitat management to remove invasive grasses and provide more suitable nesting substrate more than doubled nest survival. Predator management or use of any of the 3 types of exclosures also affected nest survival. There appeared to be no additional benefit to using both approaches, but the biological relevance of these findings is unclear because of site differences in treatments applied. Importantly, these management techniques only affected nesting success; their effect on other contributions to population viability (e.g., fledging success) was not correlated with nesting success. This long-term study illustrates the short-term benefits and tradeoffs of using nest exclosures, predator management, and habitat restoration to improve nesting success. Although we gained broader insight into the relative efficacy of common management techniques to improve avian nesting success, we cannot yet determine how improved nest success contributes to population growth. Close

• 2. [Article] Factors Affecting Snowy Plover Chick Survival in a Managed Population

  Understanding survival of precocial chicks in the period immediately following hatching has important conservation implications because population growth is often sensitive to post-hatching survival. We ...

  Citation × Citation Citation Abstract Copy Title: Factors Affecting Snowy Plover Chick Survival in a Managed Population Author: Dinsmore, Stephen J., Gaines, Eleanor P., Pearson, Scott F., Lauten, David J., Castelein, Kathleen J. Year: 2017 Understanding survival of precocial chicks in the period immediately following hatching has important conservation implications because population growth is often sensitive to post-hatching survival. We studied federally threatened Western Snowy Plover (Charadrius nivosus nivosus) broods at the northern limit of their range in coastal Oregon (n ¼ 1,157) and Washington (n ¼ 84) from 1991 to 2011 in an attempt to understand seasonal, annual, and spatial patterns of chick survival. In Oregon, plover chick survival increased with age, varied between sites, and was greater at sites with predator management. The mean probability of surviving from hatch to fledging at 28 days of age in Oregon was 0.57 (95% CI: 0.50, 0.63). In Washington, where predator management was not employed, we conducted separate analyses using individually banded and unbanded chicks and results indicated that survival generally increased with chick age. The mean estimated probability of surviving from hatch to fledging at 28 days of age in Washington was 0.27 (95% CI: 0.20, 0.35) for individually banded chicks when perfect detection was assumed. This probability increased to 0.67 (95% CI: 0.41, 0.83) when we analyzed unbanded chicks and included detection probability. Our findings confirm the importance of considering age effects in the survival of Snowy Plover chicks and raise questions about the validity of assuming perfect detection of plover chicks during brood checks. This work also highlights the benefit of predator management on chick survival. Title: Factors Affecting Snowy Plover Chick Survival in a Managed Population Author: Dinsmore, Stephen J., Gaines, Eleanor P., Pearson, Scott F., Lauten, David J., Castelein, Kathleen J. Year: 2017 Understanding survival of precocial chicks in the period immediately following hatching has important conservation implications because population growth is often sensitive to post-hatching survival. We studied federally threatened Western Snowy Plover (Charadrius nivosus nivosus) broods at the northern limit of their range in coastal Oregon (n ¼ 1,157) and Washington (n ¼ 84) from 1991 to 2011 in an attempt to understand seasonal, annual, and spatial patterns of chick survival. In Oregon, plover chick survival increased with age, varied between sites, and was greater at sites with predator management. The mean probability of surviving from hatch to fledging at 28 days of age in Oregon was 0.57 (95% CI: 0.50, 0.63). In Washington, where predator management was not employed, we conducted separate analyses using individually banded and unbanded chicks and results indicated that survival generally increased with chick age. The mean estimated probability of surviving from hatch to fledging at 28 days of age in Washington was 0.27 (95% CI: 0.20, 0.35) for individually banded chicks when perfect detection was assumed. This probability increased to 0.67 (95% CI: 0.41, 0.83) when we analyzed unbanded chicks and included detection probability. Our findings confirm the importance of considering age effects in the survival of Snowy Plover chicks and raise questions about the validity of assuming perfect detection of plover chicks during brood checks. This work also highlights the benefit of predator management on chick survival. Close

• 3. [Article] Snowy Plover Buried Alive by Wind-blown Sand

  Brief description of an encounter with a Snowy Plover discovered at a nest site near the mouth of Tahkenitch Creek in Douglas County, Oregon. The plover was buried up to its neck in sand, presumably caused ...

  Citation × Citation Citation Abstract Copy Title: Snowy Plover Buried Alive by Wind-blown Sand Author: Farrar, J. Daniel, Kotaich, Adam A., Lauten, David J., Castelein, Kathleen A., Gaines, Eleanor P. Year: 2012 Brief description of an encounter with a Snowy Plover discovered at a nest site near the mouth of Tahkenitch Creek in Douglas County, Oregon. The plover was buried up to its neck in sand, presumably caused by high winds. The article describes the authors' efforts to resuscitate the plover. Title: Snowy Plover Buried Alive by Wind-blown Sand Author: Farrar, J. Daniel, Kotaich, Adam A., Lauten, David J., Castelein, Kathleen A., Gaines, Eleanor P. Year: 2012 Brief description of an encounter with a Snowy Plover discovered at a nest site near the mouth of Tahkenitch Creek in Douglas County, Oregon. The plover was buried up to its neck in sand, presumably caused by high winds. The article describes the authors' efforts to resuscitate the plover. Close

• 4. [Article] Report on Wintering Western Snowy Plovers at Coos Bay North Spit and Impacts to Plovers from The North Jetty Repair Project, Winter 2009

  The Western Snowy Plover (Charadrius alexandrinus nivosus) breeds along the coast of the Pacific Ocean in California, Oregon, and Washington and at alkaline lakes in the interior of the western United ...

  Citation × Citation Citation Abstract Copy Title: Report on Wintering Western Snowy Plovers at Coos Bay North Spit and Impacts to Plovers from The North Jetty Repair Project, Winter 2009 Author: Lauten, David J., Castelein, Kathleen J., Gaines, Eleanor P. Year: 2009 The Western Snowy Plover (Charadrius alexandrinus nivosus) breeds along the coast of the Pacific Ocean in California, Oregon, and Washington and at alkaline lakes in the interior of the western United States (Page et al. 1991). Loss of habitat, predation pressures, and disturbance have caused the decline of the coastal population of Snowy Plovers and led to the listing of the Pacific Coast Population of Western Snowy Plovers as Threatened on March 5, 1993 (U.S. Fish and Wildlife Service 1993). Oregon Western Snowy Plovers are known to winter along the coast of Oregon as well as migrate to other wintering locations, mainly in California (Lauten et al. 2001, ORNHIC unpublished data). Previous winter surveys along the Oregon coast (Oregon Department of Fish and Wildlife, unpublished data, ORNHIC unpublished data) have documented the locations of wintering Snowy Plovers. Coos Bay North Spit (CBNS) is one location where plovers are known to winter. During the winter of 2008-2009, Army Corp of Engineers (ACOE) contracted Kerr Contractors, Inc. to complete repairs on the North Jetty of the Coos River. ACOE consulted with U.S. Fish and Wildlife Service (USFWS) regarding impacts to sensitive species including Western Snowy Plover. ACOE contracted Oregon Natural Heritage Information Center (ORNHIC) to complete two Snowy Plover surveys prior to jetty repair work, two plover surveys per week during repair work, and two plover surveys post repair work to document any potential impacts to wintering plovers. In winter, plovers tend to spend much of their time roosting along the high tide wrack line, but also spend time foraging, often on the wet sand near the surf (ORHIC, unpublished data). At CBNS, winter Snowy Plover survey data has shown that plovers will roost and feed on the beach north of the North Jetty, but also spend time roosting on the South Spoil and Habitat Restoration Areas (HRAs) east of the foredune. Large 20-ton dump trucks and other large equipment were used to haul material to the North Jetty. Vehicles used the foredune road that bisects the HRAs. Our objectives were to survey and monitor Snowy Plovers on the beach, HRAs, and South Spoil, to document the number of plovers using the area and any impacts or disturbance to the plovers during the North Jetty repair project. Title: Report on Wintering Western Snowy Plovers at Coos Bay North Spit and Impacts to Plovers from The North Jetty Repair Project, Winter 2009 Author: Lauten, David J., Castelein, Kathleen J., Gaines, Eleanor P. Year: 2009 The Western Snowy Plover (Charadrius alexandrinus nivosus) breeds along the coast of the Pacific Ocean in California, Oregon, and Washington and at alkaline lakes in the interior of the western United States (Page et al. 1991). Loss of habitat, predation pressures, and disturbance have caused the decline of the coastal population of Snowy Plovers and led to the listing of the Pacific Coast Population of Western Snowy Plovers as Threatened on March 5, 1993 (U.S. Fish and Wildlife Service 1993). Oregon Western Snowy Plovers are known to winter along the coast of Oregon as well as migrate to other wintering locations, mainly in California (Lauten et al. 2001, ORNHIC unpublished data). Previous winter surveys along the Oregon coast (Oregon Department of Fish and Wildlife, unpublished data, ORNHIC unpublished data) have documented the locations of wintering Snowy Plovers. Coos Bay North Spit (CBNS) is one location where plovers are known to winter. During the winter of 2008-2009, Army Corp of Engineers (ACOE) contracted Kerr Contractors, Inc. to complete repairs on the North Jetty of the Coos River. ACOE consulted with U.S. Fish and Wildlife Service (USFWS) regarding impacts to sensitive species including Western Snowy Plover. ACOE contracted Oregon Natural Heritage Information Center (ORNHIC) to complete two Snowy Plover surveys prior to jetty repair work, two plover surveys per week during repair work, and two plover surveys post repair work to document any potential impacts to wintering plovers. In winter, plovers tend to spend much of their time roosting along the high tide wrack line, but also spend time foraging, often on the wet sand near the surf (ORHIC, unpublished data). At CBNS, winter Snowy Plover survey data has shown that plovers will roost and feed on the beach north of the North Jetty, but also spend time roosting on the South Spoil and Habitat Restoration Areas (HRAs) east of the foredune. Large 20-ton dump trucks and other large equipment were used to haul material to the North Jetty. Vehicles used the foredune road that bisects the HRAs. Our objectives were to survey and monitor Snowy Plovers on the beach, HRAs, and South Spoil, to document the number of plovers using the area and any impacts or disturbance to the plovers during the North Jetty repair project. Close

• 5. [Article] The Distribution and reproductive success of the Western Snowy Plover along the Oregon Coast - 2012

  This report represents ORBIC's he 23rd year of monitoring the distribution, abundance, and productivity of Snowy Plovers along the Oregon coast during the breeding season. In cooperation with federal and ...

  Citation × Citation Citation Abstract Copy Title: The Distribution and reproductive success of the Western Snowy Plover along the Oregon Coast - 2012 Author: Castelein, Kathleen A., Kotaich, Adam A., Lauten, David J., Farrar, J. Daniel, Gaines, Eleanor P. This report represents ORBIC's he 23rd year of monitoring the distribution, abundance, and productivity of Snowy Plovers along the Oregon coast during the breeding season. In cooperation with federal and state agencies, plover management has focused on habitat restoration and maintenance at breeding sites, non-lethal and lethal predator management, and management of human related disturbances to nesting plovers. Title: The Distribution and reproductive success of the Western Snowy Plover along the Oregon Coast - 2012 Author: Castelein, Kathleen A., Kotaich, Adam A., Lauten, David J., Farrar, J. Daniel, Gaines, Eleanor P. This report represents ORBIC's he 23rd year of monitoring the distribution, abundance, and productivity of Snowy Plovers along the Oregon coast during the breeding season. In cooperation with federal and state agencies, plover management has focused on habitat restoration and maintenance at breeding sites, non-lethal and lethal predator management, and management of human related disturbances to nesting plovers. Close

• 6. [Article] The distribution and reproductive success of the Western Snowy Plover along the Oregon coast - 2013

  Research report submitted by the Oregon Biodiversity Information Center, part of the Institute for Natural Resources. Report submitted to the Coos Bay District - Bureau of Land Management, U.S. Fish and ...

  Citation × Citation Citation Abstract Copy Title: The distribution and reproductive success of the Western Snowy Plover along the Oregon coast - 2013 Author: Farrar, J. Daniel, Gaines, Eleanor P., Breyer, Melissa F., Castelein, Kathleen A., Lauten, David J. Research report submitted by the Oregon Biodiversity Information Center, part of the Institute for Natural Resources. Report submitted to the Coos Bay District - Bureau of Land Management, U.S. Fish and Wildlife Service, Oregon Department of Fish and Wildlife, Oregon Parks and Recreation Department. Title: The distribution and reproductive success of the Western Snowy Plover along the Oregon coast - 2013 Author: Farrar, J. Daniel, Gaines, Eleanor P., Breyer, Melissa F., Castelein, Kathleen A., Lauten, David J. Research report submitted by the Oregon Biodiversity Information Center, part of the Institute for Natural Resources. Report submitted to the Coos Bay District - Bureau of Land Management, U.S. Fish and Wildlife Service, Oregon Department of Fish and Wildlife, Oregon Parks and Recreation Department. Close

• 7. [Article] Rare, Threatened and Endangered Species of Oregon

  Extinction is a natural process. Today, however, plant and animal species are disappearing world-wide at an accelerated pace. Based on current trends, half of the species on earth will be extinct within ...

  Citation × Citation Citation Abstract Copy Title: Rare, Threatened and Endangered Species of Oregon Author: Kagan, James S., Vrilakas, Sue, Gaines, Eleanor P., Alton, Cliff, McArthur, Fern, Walsh, Kuuipo, Scheuering, Eric, Christy, John A., Hak, Jon, Tobalske, Claudine, Weiland, Annie, Koloszar, Theresa, Oregon Natural Heritage Information Center Year: 2004 Extinction is a natural process. Today, however, plant and animal species are disappearing world-wide at an accelerated pace. Based on current trends, half of the species on earth will be extinct within the next 100 years. The major cause of this phenomenon is large-scale destruction of native habitats, which has increased since European settlement began in the mid 1800's - in Oregon and throughout the New World. Once lost, a species can never be recovered, and there is no way of knowing how useful it may have been. We do know that human beings and many of their industries depend on plant and animal products. About 50% of all pharmaceuticals have a natural component as an active ingredient, yet less than one percent of the world's species have been chemically analyzed and tested. Many invertebrates and plants contain undescribed and highly functional compounds. Limnanthes floccosa subsp. grandiflora, or wooly meadow-foam, a rare plant that grows in southwest Oregon, has been recently found to produce a hybrid with the more common member of the genus, Limnanthes alba. This hybrid grows well in the poorly drained soils of the Willamette Valley and produces a valuable oil used for soaps, plastic and rubber production. In addition, the new hybrid meadow-foam does not require the field burning necessary for other crops. This species, and many other Oregon natives, will be lost without intervention. The purpose of this publication is to provide land managers, owners and interested parties with a list of those species in Oregon which are in greatest jeopardy. Title: Rare, Threatened and Endangered Species of Oregon Author: Kagan, James S., Vrilakas, Sue, Gaines, Eleanor P., Alton, Cliff, McArthur, Fern, Walsh, Kuuipo, Scheuering, Eric, Christy, John A., Hak, Jon, Tobalske, Claudine, Weiland, Annie, Koloszar, Theresa, Oregon Natural Heritage Information Center Year: 2004 Extinction is a natural process. Today, however, plant and animal species are disappearing world-wide at an accelerated pace. Based on current trends, half of the species on earth will be extinct within the next 100 years. The major cause of this phenomenon is large-scale destruction of native habitats, which has increased since European settlement began in the mid 1800's - in Oregon and throughout the New World. Once lost, a species can never be recovered, and there is no way of knowing how useful it may have been. We do know that human beings and many of their industries depend on plant and animal products. About 50% of all pharmaceuticals have a natural component as an active ingredient, yet less than one percent of the world's species have been chemically analyzed and tested. Many invertebrates and plants contain undescribed and highly functional compounds. Limnanthes floccosa subsp. grandiflora, or wooly meadow-foam, a rare plant that grows in southwest Oregon, has been recently found to produce a hybrid with the more common member of the genus, Limnanthes alba. This hybrid grows well in the poorly drained soils of the Willamette Valley and produces a valuable oil used for soaps, plastic and rubber production. In addition, the new hybrid meadow-foam does not require the field burning necessary for other crops. This species, and many other Oregon natives, will be lost without intervention. The purpose of this publication is to provide land managers, owners and interested parties with a list of those species in Oregon which are in greatest jeopardy. Close

• 8. [Article] Rare, Threatened and Endangered Plants and Animals of Oregon

  Extinction is a natural process. Today, however, plant and animal species are disappearing world-wide at an accelerated pace. Based on current trends, half of the species on earth will be extinct within ...

  Citation × Citation Citation Abstract Copy Title: Rare, Threatened and Endangered Plants and Animals of Oregon Author: Kagan, James S., Vrilakas, Sue, Gaines, Eleanor P., Alton, Cliff, Popper, Ken, Stern, Mark A., Scheuering, Eric, Christy, John A., Finnerty, Mary, Hak, Jon, Tovar, Anthony A., Murray, Michael, Tobalske, Claudine, Oregon Natural Heritage Program Year: 2001 Extinction is a natural process. Today, however, plant and animal species are disappearing world-wide at an accelerated pace. Based on current trends, half of the species on earth will be extinct within the next 100 years. The major cause of this phenomenon is large-scale destruction of native habitats, which has increased since European settlement began in the mid 1800's - in Oregon and throughout the New World. Once lost, a species can never be recovered, and there is no way of knowing how useful it may have been. We do know that human beings and many of their industries depend on plant and animal products. About 50% of all pharmaceuticals have a natural component as an active ingredient, yet less than one percent of the world's species have been chemically analyzed and tested. Many invertebrates and plants contain undescribed and highly functional compounds. Limnanthes floccosa subsp. grandiflora, or wooly meadow-foam, a rare plant that grows in southwest Oregon, has been recently found to produce a hybrid with the more common member of the genus, Limnanthes alba. This hybrid grows well in the poorly drained soils of the Willamette Valley and produces a valuable oil used for soaps, plastic and rubber production. In addition, the new hybrid meadow-foam does not require the field burning necessary for other crops. This species, and many other Oregon natives, will be lost without intervention. The purpose of this book is to provide land managers, owners and interested parties with a list of those species in Oregon which are in greatest jeopardy. Title: Rare, Threatened and Endangered Plants and Animals of Oregon Author: Kagan, James S., Vrilakas, Sue, Gaines, Eleanor P., Alton, Cliff, Popper, Ken, Stern, Mark A., Scheuering, Eric, Christy, John A., Finnerty, Mary, Hak, Jon, Tovar, Anthony A., Murray, Michael, Tobalske, Claudine, Oregon Natural Heritage Program Year: 2001 Extinction is a natural process. Today, however, plant and animal species are disappearing world-wide at an accelerated pace. Based on current trends, half of the species on earth will be extinct within the next 100 years. The major cause of this phenomenon is large-scale destruction of native habitats, which has increased since European settlement began in the mid 1800's - in Oregon and throughout the New World. Once lost, a species can never be recovered, and there is no way of knowing how useful it may have been. We do know that human beings and many of their industries depend on plant and animal products. About 50% of all pharmaceuticals have a natural component as an active ingredient, yet less than one percent of the world's species have been chemically analyzed and tested. Many invertebrates and plants contain undescribed and highly functional compounds. Limnanthes floccosa subsp. grandiflora, or wooly meadow-foam, a rare plant that grows in southwest Oregon, has been recently found to produce a hybrid with the more common member of the genus, Limnanthes alba. This hybrid grows well in the poorly drained soils of the Willamette Valley and produces a valuable oil used for soaps, plastic and rubber production. In addition, the new hybrid meadow-foam does not require the field burning necessary for other crops. This species, and many other Oregon natives, will be lost without intervention. The purpose of this book is to provide land managers, owners and interested parties with a list of those species in Oregon which are in greatest jeopardy. Close

• 9. [Article] Report on wintering western snowy plovers at Coos Bay north spit and impacts to plovers from the North Jetty repair project, winter 2009

  coast of the Pacific Ocean in California, Oregon, and Washington and at alkaline lakes in the interior of the western United States (Page et al. 1991). Loss of habitat, predation pressures, and disturbance ...

  Citation × Citation Citation Abstract Copy Title: Report on wintering western snowy plovers at Coos Bay north spit and impacts to plovers from the North Jetty repair project, winter 2009 Author: Institute for Natural Resources, Castelein, Kathleen A., Gaines, Eleanor P., Lauten, David J., Oregon Natural Heritage Information Center coast of the Pacific Ocean in California, Oregon, and Washington and at alkaline lakes in the interior of the western United States (Page et al. 1991). Loss of habitat, predation pressures, and disturbance have caused the decline of the coastal population of Snowy Plovers and led to the listing of the Pacific Coast Population of Western Snowy Plovers as Threatened on March 5, 1993 (U.S. Fish and Wildlife Service 1993). Oregon Western Snowy Plovers are known to winter along the coast of Oregon as well as migrate to other wintering locations, mainly in California (Lauten et al. 2001, ORNHIC unpublished data). Previous winter surveys along the Oregon coast (Oregon Department of Fish and Wildlife, unpublished data, ORNHIC unpublished data) have documented the locations of wintering Snowy Plovers. Coos Bay North Spit (CBNS) is one location where plovers are known to winter. During the winter of 2008-2009, Army Corp of Engineers (ACOE) contracted Kerr Contractors, Inc. to complete repairs on the North Jetty of the Coos River. ACOE consulted with U.S. Fish and Wildlife Service (USFWS) regarding impacts to sensitive species including Western Snowy Plover. ACOE contracted Oregon Natural Heritage Information Center (ORNHIC) to complete two Snowy Plover surveys prior to jetty repair work, two plover surveys per week during repair work, and two plover surveys post repair work to document any potential impacts to wintering plovers. Title: Report on wintering western snowy plovers at Coos Bay north spit and impacts to plovers from the North Jetty repair project, winter 2009 Author: Institute for Natural Resources, Castelein, Kathleen A., Gaines, Eleanor P., Lauten, David J., Oregon Natural Heritage Information Center coast of the Pacific Ocean in California, Oregon, and Washington and at alkaline lakes in the interior of the western United States (Page et al. 1991). Loss of habitat, predation pressures, and disturbance have caused the decline of the coastal population of Snowy Plovers and led to the listing of the Pacific Coast Population of Western Snowy Plovers as Threatened on March 5, 1993 (U.S. Fish and Wildlife Service 1993). Oregon Western Snowy Plovers are known to winter along the coast of Oregon as well as migrate to other wintering locations, mainly in California (Lauten et al. 2001, ORNHIC unpublished data). Previous winter surveys along the Oregon coast (Oregon Department of Fish and Wildlife, unpublished data, ORNHIC unpublished data) have documented the locations of wintering Snowy Plovers. Coos Bay North Spit (CBNS) is one location where plovers are known to winter. During the winter of 2008-2009, Army Corp of Engineers (ACOE) contracted Kerr Contractors, Inc. to complete repairs on the North Jetty of the Coos River. ACOE consulted with U.S. Fish and Wildlife Service (USFWS) regarding impacts to sensitive species including Western Snowy Plover. ACOE contracted Oregon Natural Heritage Information Center (ORNHIC) to complete two Snowy Plover surveys prior to jetty repair work, two plover surveys per week during repair work, and two plover surveys post repair work to document any potential impacts to wintering plovers. Close

• 10. [Article] The Distribution and Reproductive Success of the Western Snowy Plover along the Oregon Coast - 2010

  From 8 April – 27 September 2010 we monitored the distribution, abundance and productivity of the federally Threatened Western Snowy Plover (Charadrius alexandrinus nivosus) along the Oregon coast. From ...

  Citation × Citation Citation Abstract Copy Title: The Distribution and Reproductive Success of the Western Snowy Plover along the Oregon Coast - 2010 Author: Lauten, David J., Castelein, Kathleen J., Farrar, J. Daniel, Kotaich, Adam A., Gaines, Eleanor P. Year: 2010 From 8 April – 27 September 2010 we monitored the distribution, abundance and productivity of the federally Threatened Western Snowy Plover (Charadrius alexandrinus nivosus) along the Oregon coast. From north to south, we surveyed and monitored plover activity at Sutton Beach, Siltcoos River estuary, the Dunes Overlook, North Tahkenitch Creek, Tenmile Creek, Coos Bay North Spit, Bandon Beach, New River, and Floras Lake. Our objectives for the Oregon coastal population in 2010 were to: 1) estimate the size of the adult Snowy Plover population, 2) locate plover nests, 3) continue selective use of mini-exclosures (MEs) to protect nests from predators and evaluate whether exclosure use can be reduced, 4) determine nest success, 5) determine fledging success, 6) monitor brood movements, 7) collect general observational information about predators, and 8) evaluate the effectiveness of predator management. We observed an estimated 232-236 adult Snowy Plovers; a minimum of 175 individuals was known to have nested. The adult plover population was the highest estimate recorded since monitoring began in 1990. We monitored 261 nests in 2010, the highest number of nests since monitoring began in 1990. Overall Mayfield nest success was 25%. Exclosed nests (n = 67) had a 72% apparent nest success rate, and unexclosed nests (n = 194) had a 23% apparent nest success rate. Nest failures were attributed to unknown depredation (24%), unknown cause (17%), one-egg nests (15%), rodent depredation (14%), abandonment (12%), wind/weather (5%), corvid depredation (5%), mammalian depredation (4%), wave overwash (2%), infertility (2%), and adult depredation (1%). We monitored 94 broods, including two from unknown nests, and documented a minimum of 80 fledglings. Overall brood success was 55%, fledging success was 33%, and 0.90 fledglings per male were produced. Continued predator management, habitat improvement and maintenance, and management of recreational activities at all sites are recommended to achieve recovery goals. Title: The Distribution and Reproductive Success of the Western Snowy Plover along the Oregon Coast - 2010 Author: Lauten, David J., Castelein, Kathleen J., Farrar, J. Daniel, Kotaich, Adam A., Gaines, Eleanor P. Year: 2010 From 8 April – 27 September 2010 we monitored the distribution, abundance and productivity of the federally Threatened Western Snowy Plover (Charadrius alexandrinus nivosus) along the Oregon coast. From north to south, we surveyed and monitored plover activity at Sutton Beach, Siltcoos River estuary, the Dunes Overlook, North Tahkenitch Creek, Tenmile Creek, Coos Bay North Spit, Bandon Beach, New River, and Floras Lake. Our objectives for the Oregon coastal population in 2010 were to: 1) estimate the size of the adult Snowy Plover population, 2) locate plover nests, 3) continue selective use of mini-exclosures (MEs) to protect nests from predators and evaluate whether exclosure use can be reduced, 4) determine nest success, 5) determine fledging success, 6) monitor brood movements, 7) collect general observational information about predators, and 8) evaluate the effectiveness of predator management. We observed an estimated 232-236 adult Snowy Plovers; a minimum of 175 individuals was known to have nested. The adult plover population was the highest estimate recorded since monitoring began in 1990. We monitored 261 nests in 2010, the highest number of nests since monitoring began in 1990. Overall Mayfield nest success was 25%. Exclosed nests (n = 67) had a 72% apparent nest success rate, and unexclosed nests (n = 194) had a 23% apparent nest success rate. Nest failures were attributed to unknown depredation (24%), unknown cause (17%), one-egg nests (15%), rodent depredation (14%), abandonment (12%), wind/weather (5%), corvid depredation (5%), mammalian depredation (4%), wave overwash (2%), infertility (2%), and adult depredation (1%). We monitored 94 broods, including two from unknown nests, and documented a minimum of 80 fledglings. Overall brood success was 55%, fledging success was 33%, and 0.90 fledglings per male were produced. Continued predator management, habitat improvement and maintenance, and management of recreational activities at all sites are recommended to achieve recovery goals. Close