scholarly journals Influence of olfactory and visual cover on nest site selection and nest success for grassland-nesting birds

2017 ◽  
Vol 7 (16) ◽  
pp. 6247-6258 ◽  
Author(s):  
Dillon T. Fogarty ◽  
R. Dwayne Elmore ◽  
Samuel D. Fuhlendorf ◽  
Scott R. Loss
The Condor ◽  
2021 ◽  
Vol 123 (1) ◽  
Author(s):  
Christopher R Anthony ◽  
Christian A Hagen ◽  
Katie M Dugger ◽  
R Dwayne Elmore

Abstract Temperature at fine spatial scales is an important driver of nest site selection for many avian species during the breeding season and can influence nest success. Sagebrush (Artemisia spp.) communities have areas with high levels of vegetation heterogeneity and high thermal variation; however, fire removes vegetation that provides protection from predators and extreme environmental conditions. To examine the influence of microclimates on Greater Sage-Grouse (Centrocercus urophasianus) nest site selection and nest success in a fire-affected landscape, we measured black bulb temperature (Tbb) and vegetation attributes (e.g., visual obstruction) at 3 spatial scales (i.e. nest bowl, microsite, and landscape) in unburned and burned areas. Nest bowls exhibited greater buffering of Tbb than both nearby microsites and the broader landscape. Notably, nest bowls were warmer in cold temperatures, and cooler in hot temperatures, than nearby microsites and the broader landscape, regardless of burn stage. Nest survival (NS) was higher for nests in unburned areas compared to nests in burned areas (unburned NS = 0.43, 95% confidence interval [CI]: 0.33–0.54; burned NS = 0.24, 95% CI: 0.10–0.46). The amount of bare ground was negatively associated with NS, but effects diminished as the amount of bare ground reached low levels. Shrub height and visual obstruction were positively associated with NS during the entire study period, whereas minimum Tbb had a weaker effect. Our findings demonstrate that thermoregulatory selection by Greater Sage-Grouse at nest sites had marginal effects on their NS. However, given that increases in vegetation structure (e.g., shrub height) provide thermal refuge and increase NS, vegetation remnants or regeneration in a post-fire landscape could be critical to Greater Sage-Grouse nesting ecology.


Bird Study ◽  
2016 ◽  
Vol 64 (1) ◽  
pp. 30-36 ◽  
Author(s):  
Nikolas P. Bertholdt ◽  
Jennifer A. Gill ◽  
Rebecca A. Laidlaw ◽  
Jennifer Smart

The Condor ◽  
2017 ◽  
Vol 119 (1) ◽  
pp. 85-97 ◽  
Author(s):  
Heather R. McFarland ◽  
Steve Kendall ◽  
Abby N. Powell

2008 ◽  
Vol 79 (1) ◽  
pp. 24-31 ◽  
Author(s):  
Thais M. Aguilar ◽  
Raphael I. Dias ◽  
Ailton C. Oliveira ◽  
Regina H. Macedo

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Auriel M. V. Fournier ◽  
Joseph D. Lancaster ◽  
Aaron P. Yetter ◽  
Christopher S. Hine ◽  
Tyler Beckerman ◽  
...  

The Condor ◽  
2003 ◽  
Vol 105 (2) ◽  
pp. 373-378 ◽  
Author(s):  
Dana K. Kellett ◽  
Ray T. Alisauskas ◽  
Katherine R. Mehl

Abstract We investigated factors influencing nest success in King Eiders (Somateria spectabilis) at Karrak Lake, Nunavut, Canada, during 1995–2001. Island-nesting King Eiders had higher nest success (range 30–89%) than that reported for mainland-nesting populations, and nested at much higher densities (46–198 nests km−2) than on mainland, where they were detected infrequently (usually <1 nest km−2). Predation was the main cause of nest failure, and King Eider nest success was greater on isolated islands (smaller islands, and larger islands farther from the mainland) that were presumably less accessible to mammalian predators. King Eiders did not derive protection from predators by nesting near gulls (Larus spp.) and Arctic Terns (Sterna paradisaea). Selección del Sitio de Nidificación, Asociaciones Interespecíficas y Éxito de Nidificación de Somateria spectabilis Resumen. Investigamos los factores que influencian el éxito de nidificación de Somateria spectabilis en Karrak Lake, Nunavut, Canada, durante 1995–2001. Los individuos que nidifican en las islas presentaron un mayor éxito de nidificación (entre 30–89%) que el reportado para las poblaciones que nidifican en el continente, y anidaron a una mayor densidad que en el continente, donde se detectaron infrecuentemente (usualmente <1 nido km−2). La depredación fue la principal causa de fracaso, y el éxito de nidificación de S. spectabilis fue mayor en islas grandes y pequeñas más alejadas del continente, las que presumiblemente se encontraban menos accesibles a mamíferos depredadores. Somateria spectabilis no obtuvo protección contra depredadores al nidificar cerca de gaviotas (Larus spp.) y gaviotines Sterna paradisaea.


Sign in / Sign up

Export Citation Format

Share Document