Environmental cues used by Greater Sage-Grouse to initiate altitudinal migration

Pratt, Aaron C.; Smith, Kurt T.; Beck, Jeffrey L.

doi:10.1642/auk-16-192.1

Cited by 25 publications

(25 citation statements)

References 56 publications

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“…, Pratt et al. ). Winter habitat typically includes lower elevation areas with continuous patches of sagebrush, lower snow depths, and gentle southerly‐facing slopes (Eng and Schladweiler , Doherty et al.…”

Section: Introductionmentioning

confidence: 99%

“…, Pratt et al. ). This suggests there may be trade‐offs among different migration strategies for sage‐grouse.…”

Section: Introductionmentioning

confidence: 99%

“…Inter-seasonal movement of sage-grouse is variable with some individuals moving large distances between breeding and winter habitats (Beck et al 2006, Bruce et al 2011, Fedy et al 2012, Pratt et al 2017. Winter habitat typically includes lower elevation areas with continuous patches of sagebrush, lower snow depths, and gentle southerlyfacing slopes (Eng and Schladweiler 1972, Doherty et al 2008, Carpenter et al 2010, Connelly et al 2011.…”

Section: Introductionmentioning

confidence: 99%

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Quantifying overlap and fitness consequences of migration strategy with seasonal habitat use and a conservation policy

et al. 2017

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2017. Quantifying overlap and fitness consequences of migration strategy with seasonal habitat use and a conservation policy. Ecosphere 8(11):e01991. 10. 1002/ecs2.1991 Abstract. Our study aimed to delineate seasonal habitats and assess differential fitness related to migration strategy and seasonal habitat use of greater sage-grouse (Centrocercus urophasianus, hereafter "sagegrouse"). In addition, we evaluated benefits gained for sage-grouse through the implementation of the Wyoming Core Area Strategy relative to protection of habitat and differences in nest, brood, and annual female survival. We compared the proportion of seasonal habitats that were within or outside Core Areas as delineated with 75% and 95% kernel density contours (KDE). The proportion of summer and winter habitats (95% KDE) that overlapped Core Areas was 0.69 of summer and 0.50 of winter habitat within a Core Area. We found no differences in nest or brood survival among migration strategies or within and outside Core Areas. However, females that did not migrate out of their respective winter habitat had lower risk of death, which highlighted year-round benefits of winter habitat. Females had lower risk of death during winter with the lowest risk occurring during winter in Core Areas. Higher temperature and lower snow water equivalent during the breeding season and fall were detrimental to female survival, whereas neither had an effect on winter survival. Although Core Areas encompassed a large proportion of winter habitat, our results indicate that Core Areas (as delineated) were not the most direct way to protect winter habitat for sage-grouse. During winter, sage-grouse gathered within habitat conducive to winter survival, indicating that disturbances within these winter habitats may have broad consequences for sage-grouse populations.

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Section: Introductionmentioning

confidence: 99%

“…, Pratt et al. ). This suggests there may be trade‐offs among different migration strategies for sage‐grouse.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantifying overlap and fitness consequences of migration strategy with seasonal habitat use and a conservation policy

et al. 2017

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“…These methods largely relied on spatial relationships between female habitat use during nesting and distance to known occupied leks (Holloran and Anderson , Coates et al ). The relationship between population indices and habitat use, however, remains unclear during winter, particularly when individuals and populations display unique movements to wintering areas that are disjunct from breeding habitats (Fedy et al , Smith et al , Pratt et al ). In cases where winter habitats are close to leks, we still lack a clear relationship between relative size of winter flocks and winter resource selection in the absence of intensive telemetry studies.…”

Section: Discussionmentioning

confidence: 99%

“…Yet the Core Area Strategy acknowledges that essential seasonal habitats may occur outside of Core Areas; these areas may be necessary to fulfill seasonal habitat requirements of sage‐grouse that breed in Core Areas (USFWS , State of Wyoming ). Sage‐grouse are a partially migratory species with many individuals within populations using spatially distinct breeding and winter habitats (Connelly et al , Dinkins et al , Pratt et al ). During winter, sage‐grouse generally require large expanses of sagebrush above snow in flatter terrain with few anthropogenic features (Doherty et al ; Carpenter et al ; Dzialak et al ; Smith et al , ; Holloran et al ).…”

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Approaches to delineate greater sage‐grouse winter concentration areas

2019

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The usefulness of protected areas as regulatory mechanisms to conserve wildlife populations relies on their ability to contain all seasonal habitats necessary for species persistence. Efficient conservation practices require understanding behavior and habitat needs of individual species and populations rather than simply relying on reserves of approximate size and configuration. Priority Areas of Conservation (PACs) have been delineated as protected areas based on known breeding habitat for greater sage‐grouse (Centrocercus urophasianus; sage‐grouse) throughout their range. These PACs include Core Areas designated in the Wyoming Sage‐grouse Executive Order; however, this order also indicated the need to identify winter concentration areas (WCAs; flocks ≥50 individuals) based on habitat features using validated resource selection functions (RSFs). We used aerial infrared videography to identify locations of wintering sage‐grouse in south‐central and southwest Wyoming, USA, to evaluate winter sage‐grouse habitat selection with individual‐based RSFs, RSFs based on WCAs, and relative flock size. We located 4,859 individuals comprising 132 flocks across our study area. Flocks occurred in Core Areas more than expected, but a biologically meaningful number of sage‐grouse flocks were located outside of Core Areas. Individual‐based RSFs contained useful predictors that were consistent with previous sage‐grouse winter habitat selection studies. Flock size and WCA models produced similar predictions to individual‐based RSF models. Individual‐based and WCA‐based RSF model predictions had a high degree of similarity, suggesting that identifying important winter habitats with individual‐based RSF modeling is useful for locating potential WCAs when information on flock sizes is not available. Our results and survey technique provide a potential framework for identifying sage‐grouse WCAs with implications for improving PAC protection of all seasonal habitats for sage‐grouse conservation. © 2019 The Wildlife Society.

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Evolution of altitudinal migration in passerines is linked to diet

Pageau

Vale

Menezes

et al. 2020

Ecology and Evolution

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Bird migration is typically associated with a latitudinal movement from north to south and vice versa. However, many bird species migrate seasonally with an upslope or downslope movement in a process termed altitudinal migration. Globally, 830 of the 6,579 Passeriformes species are considered altitudinal migrants and this pattern has emerged multiple times across 77 families of this order. Recent work has indicated an association between altitudinal migration and diet, but none have looked at diet as a potential evolutionary driver. Here, we investigated potential evolutionary drivers of altitudinal migration in passerines around the world by using phylogenetic comparative methods. We tested for evolutionary associations between altitudinal migration and foraging guild and primary habitat preference in passerines species worldwide. Our results indicate that foraging guild is evolutionarily associated with altitudinal migration, but this relationship varies across zoogeographical regions. In the Nearctic, herbivorous and omnivorous species are associated with altitudinal migration, while only omnivorous species are associated with altitudinal migration in the Palearctic. Habitat was not strongly linked to the evolution of altitudinal migration. While our results point to diet as a potentially important driver of altitudinal migration, the evolution of this behavior is complex and certainly driven by multiple factors. Altitudinal migration varies in its use (for breeding or molting), within a species, population, and even at the individual level. As such, the evolution of altitudinal migration is likely driven by an ensemble of factors, but this study provides a beginning framework for understanding the evolution of this complex behavior.

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Environmental cues used by Greater Sage-Grouse to initiate altitudinal migration

Cited by 25 publications

References 56 publications

Quantifying overlap and fitness consequences of migration strategy with seasonal habitat use and a conservation policy

Quantifying overlap and fitness consequences of migration strategy with seasonal habitat use and a conservation policy

Approaches to delineate greater sage‐grouse winter concentration areas

Evolution of altitudinal migration in passerines is linked to diet

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