Northern Bobwhite (Colinus virginianus)

Brennan, Leonard A.; Hernández, Fidel; Williford, Damon

doi:10.2173/tbna.397.p

Cited by 23 publications

(27 citation statements)

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“…Our annual survival estimate derived from weekly survival for radio‐marked bobwhite (10.6%) was within the range of other published bobwhite studies (Brennan et al 2020, Sandercock et al 2008). However, our seasonal and sex‐specific survival estimates generally differed from those reported in the literature.…”

Section: Discussionsupporting

confidence: 87%

Estimating harvest rate and the effects of hunting pressure on northern bobwhite survival

et al. 2020

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Section: Discussionsupporting

confidence: 87%

Estimating harvest rate and the effects of hunting pressure on northern bobwhite survival

et al. 2020

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“…For northern bobwhite, annual grain drought clearly drives survival (Hernández et al, ), reproduction (Guthery, Koerth, & Smith, ; Hernández et al, ), and abundance (Bridges, Peterson, Silvy, Smeins, & Ben Wu, ; Lusk, Guthery, Peterson, & Demaso, ), although the relationship between precipitation and population size is not always a clear, linear trend (Guthery et al, ; see Parent et al, ). Northern bobwhite, dickcissel, and horned lark depend heavily on plant material as an important food resource (Brennan, Hernandez, & Wáiford, ; Temple, ; Beason, , respectively). Drought can dampen vegetation vigor (Gu et al, ; Ji & Peters, ), delay seed germination (Dornbos, Mullen, & Shibles, ), decrease aboveground net primary productivity (Hoover, Knapp, & Smith, ), decrease herbaceous plant species richness and cover (Copeland et al, ), and cause plant mortality (Breshears et al, ).…”

Section: Discussionmentioning

confidence: 99%

Species‐specific and temporal scale‐dependent responses of birds to drought

Cady

O’Connell

Loss

et al. 2019

Global Change Biology

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Global climate change is increasing the frequency and intensity of weather extremes, including severe droughts in many regions. Drought can impact organisms by inhibiting reproduction, reducing survival and abundance, and forcing range shifts. For birds, considering temporal scale by averaging drought‐related variables over different time lengths (i.e., temporal grains) captures different hydrologic attributes which may uniquely influence food supplies, vegetation greenness/structure, and other factors affecting populations. However, studies examining drought impacts on birds often assess a single temporal grain without considering that different species have different life histories that likely determine the temporal grain of their drought response. Furthermore, while drought is known to influence bird abundance and drive between‐year range shifts, less understood is whether it causes within‐range changes in species distributions. Our objectives were to (a) determine which temporal grain of drought (if any) is most related to bird presence/absence and whether this response is species specific; and (b) assess whether drought alters bird distributions by quantifying probability of local colonization and extinction as a function of drought intensity. We used North American Breeding Bird Survey data collected over 16 years, generalized linear mixed models, and dynamic occupancy models to meet these objectives. Different bird species responded to drought at different temporal grains, with most showing the strongest signal at annual or near‐annual grains. For all drought‐responsive species, increased drought intensity at any temporal grain always correlated with decreased occupancy. Additionally, colonization/extinction analyses indicated that one species, the dickcissel (Spiza americana), is more likely to colonize novel areas within the southern/core portion of its range during drought. Considering drought at different temporal grains, along with hydrologic attributes captured by each grain, may better reveal mechanisms behind drought impacts on birds and other organisms, and therefore improve understanding of how global climate change impacts species and the landscapes they inhabit.

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“…Th e northern bobwhite is an economically important gamebird in the southern and central United States (Brennan 1999). It is associated with early successional vegetation, making use of agricultural fi elds, grasslands, grass-shrub rangelands, park-like pine forests and mixed pine-hardwood forests.…”

Section: Natural Historymentioning

confidence: 99%

Multiscale habitat suitability index models for priority landbirds in the Central Hardwoods and West Gulf Coastal Plain/Ouachitas Bird Conservation Regions

Tirpak¹,

Jones-Farrand²,

Thompson³

et al. 2009

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Ecoregional conservation planning for priority landbirds requires methods that explicitly link populations to habitat conditions at multiple scales. We developed Habitat Suitability Index (HSI) models to assess habitat quality for 40 priority bird species in the Central Hardwoods and West Gulf Coastal Plain/Ouachitas Bird Conservation Regions. The models incorporated both site and landscape environmental variables derived from one of six nationally consistent datasets: ecological subsections from the National Ecological Unit Hierarchy, National Land Cover Dataset, National Elevation Dataset, National Hydrography Dataset, State Soil Geographic Database, and Forest Inventory and Analysis data. We initially defi ned potential habitat for each species from unique landform, landcover, and successional age class combinations. Species-specifi c environmental variables identifi ed from the literature were used to refi ne initial habitat estimates. We verifi ed models by comparing subsection-level HSI scores and Breeding Bird Survey (BBS) abundance via Spearman rank correlation. To validate models, we developed generalized linear models that predicted BBS abundance as a function of HSI score and Bird Conservation Region. We considered models that included a signifi cant (P ≤ 0.100) positive coefficient on the BBS predictor to be valid and useful for conservation planning.

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Northern Bobwhite (Colinus virginianus)

Cited by 23 publications

References 0 publications

Estimating harvest rate and the effects of hunting pressure on northern bobwhite survival

Estimating harvest rate and the effects of hunting pressure on northern bobwhite survival

Species‐specific and temporal scale‐dependent responses of birds to drought

Multiscale habitat suitability index models for priority landbirds in the Central Hardwoods and West Gulf Coastal Plain/Ouachitas Bird Conservation Regions

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