Chestnut-collared Longspur (Calcarius ornatus)

Bleho, Barbara I.; Ellison, Kevin; Hill, Dorothy P.; Gould, Lorne K.

doi:10.2173/bna.288

Cited by 18 publications

(14 citation statements)

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“…In addition, new individuals may be unwilling to settle near turbines. We detected delayed displacement for Grasshopper Sparrow, Western Meadowlark, Bobolink, Upland Sandpiper, Clay‐colored Sparrow, and Chestnut‐collared Longspur, all of which exhibit breeding site fidelity (Hill & Gould ; Jones et al. ).…”

Section: Discussionmentioning

confidence: 92%

Effects of wind‐energy facilities on breeding grassland bird distributions

Shaffer

Buhl

2015

Conservation Biology

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The contribution of renewable energy to meet worldwide demand continues to grow. Wind energy is one of the fastest growing renewable sectors, but new wind facilities are often placed in prime wildlife habitat. Long-term studies that incorporate a rigorous statistical design to evaluate the effects of wind facilities on wildlife are rare. We conducted a before-after-control-impact (BACI) assessment to determine if wind facilities placed in native mixed-grass prairies displaced breeding grassland birds. During 2003-2012, we monitored changes in bird density in 3 study areas in North Dakota and South Dakota (U.S.A.). We examined whether displacement or attraction occurred 1 year after construction (immediate effect) and the average displacement or attraction 2-5 years after construction (delayed effect). We tested for these effects overall and within distance bands of 100, 200, 300, and >300 m from turbines. We observed displacement for 7 of 9 species. One species was unaffected by wind facilities and one species exhibited attraction. Displacement and attraction generally occurred within 100 m and often extended up to 300 m. In a few instances, displacement extended beyond 300 m. Displacement and attraction occurred 1 year after construction and persisted at least 5 years. Our research provides a framework for applying a BACI design to displacement studies and highlights the erroneous conclusions that can be made without the benefit of adopting such a design. More broadly, species-specific behaviors can be used to inform management decisions about turbine placement and the potential impact to individual species. Additionally, the avoidance distance metrics we estimated can facilitate future development of models evaluating impacts of wind facilities under differing land-use scenarios.

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Section: Discussionmentioning

confidence: 92%

Effects of wind‐energy facilities on breeding grassland bird distributions

Shaffer

Buhl

2015

Conservation Biology

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“…Elsewhere we have shown that litter depth is shorter near newer shallow gas wells, but this effect decreases as wells age, presumably because vegetation destroyed during well construction gradually regenerates over time [22]. Short vegetation and higher abundances of exotic grasses near wells [22, 39] may lead to lower availability of invertebrates and seeds [68–70], which are primary food sources for chestnut-collared longspurs during the breeding season [71–73]. Therefore, food availability may increase as residual effects of well construction decline over time.…”

Section: Discussionmentioning

confidence: 99%

Effects of shallow natural gas well structures and associated roads on grassland songbird reproductive success in Alberta, Canada

Yoo

Koper

2017

PLoS ONE

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Grassland songbird populations across North America have experienced dramatic population declines due to habitat loss and degradation. In Canada, energy development continues to fragment and disturb prairie habitat, but effects of oil and gas development on reproductive success of songbirds in North American mixed-grass prairies remains largely unknown. From 2010–2012, in southeastern Alberta, Canada, we monitored 257 nests of two ground-nesting grassland songbird species, Savannah sparrow (Passerculus sandwichensis) and chestnut-collared longspur (Calcarius ornatus). Nest locations varied with proximity to and density of conventional shallow gas well structures and associated roads in forty-two 258-ha mixed-grass prairie sites. We estimated the probabilities of nest success and clutch size relative to gas well structures and roads. There was little effect of distance to or density of gas well structure on nest success; however, Savannah sparrow experienced lower nest success near roads. Clutch sizes were lower near gas well structures and cattle water sources. Minimizing habitat disturbance surrounding gas well structures, and reducing abundance of roads and trails, would help minimize impacts on reproductive success for some grassland songbirds.

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“…Conversely, some habitat structure variables, such as litter depth, did not exhibit many changes beyond a single year of grazing, demonstrating that some elements of habitat structure are more sensitive to grazing duration. From a management perspective, this suggests that even a single year of grazing can alter habitat structure to promote the conservation of species at risk, such as chestnut-collared longspurs (Calcarius ornatus), a passerine species that prefers short vegetation and shallow litter depth (Hill and Gould, 1997).…”

Section: Discussionmentioning

confidence: 99%