Mourning Dove Population Trend Estimates from Call-Count and North American Breeding Bird Surveys

1994 ◽  
Vol 58 (3) ◽  
pp. 506 ◽  
Author(s):  
John R. Sauer ◽  
David D. Dolton ◽  
Sam Droege
Keyword(s):  
North American ◽  
Population Trend ◽  
Mourning Dove ◽  
Breeding Bird

scholarly journals Population trend status of Ontario’s forest birds

2009 ◽  
Vol 85 (2) ◽  
pp. 184-201 ◽  
Author(s):  
Peter J Blancher ◽  
R. Dean Phoenix ◽  
Debra S Badzinski ◽  
Michael D Cadman ◽  
Tara L Crewe ◽  
...  
Keyword(s):  
Agricultural Landscapes ◽  
Forest Birds ◽  
Population Trend ◽  
Individual Species ◽  
Population Declines ◽  
Breeding Bird ◽  
The North ◽  
Aerial Insectivore ◽  
Monitoring Reliability ◽  
Wide Scale

Recent population trends of Ontario’s forest birds were assessed by integrating results across 8 bird surveys to provide an estimate of trend status for all of Ontario, and for 2 forested regions of Ontario separately. Surveys with mid- and longterm trends were relied on most extensively in this assessment. Comparison of the first and second Breeding Bird Atlases was especially important for estimating trends in northern forests, but overall reliability of status assessments in the north was considered poor due to limited coverage and significant potential for bias. Trends of most forest birds were stable or positive at the Ontario-wide scale, with trends at least as positive as forest birds elsewhere in North America, and showing more positive trends overall than birds of agricultural landscapes. Nevertheless, individual species trends ranged from large declines to large increases, and several forest birds have been added to Species at Risk lists largely because of population declines. There were few differences in trend status among forest birds grouped by habitat association or migratory guild, although all 5 aerial insectivore species have declined. Better monitoring coverage of the boreal will be needed if improved reliability of trends is desired in the near future. Key words: Ontario, forest birds, boreal forest, population trend, bird surveys, monitoring reliability

Realized climate niche breadth varies with population trend and distribution in North American birds

2016 ◽  
Vol 25 (10) ◽  
pp. 1173-1180 ◽  
Author(s):  
Joel Ralston ◽  
William V. DeLuca ◽  
Richard E. Feldman ◽  
David I. King
Keyword(s):  
North American ◽  
Niche Breadth ◽  
Population Trend ◽  
Climate Niche

scholarly journals THE RELATIVE IMPORTANCE OF THREE SPECIFIC CLIMATIC FACTORS ON NORTH AMERICAN BREEDING BIRD SPECIES RICHNESS

2017 ◽  
Vol XLII-2/W7 ◽  
pp. 1455-1459
Author(s):  
M. Zhang ◽  
Y. Lin
Keyword(s):  
North American ◽  
Climatic Factors ◽  
Potential Evapotranspiration ◽  
Linear Regression Analysis ◽  
Bird Species ◽  
Migratory Species ◽  
Breeding Bird ◽  
Bird Species Richness ◽  
The North ◽  
Bird Richness

Understanding of the relationships between bird species and environment facilitates protecting avian biodiversity and maintaining nature sustaining. However, the effects of many climatic factors on bird richness have not been fully grasped. To fill this gap, this study investigated the relationships between the richness of three typical North American breeding bird species and three climatic factors at the monthly scale. Based on the North American Breeding Bird Survey (BBS) data during 1967–2014, the relationships between the numbers of Carolina wren, Cerulean warbler, and Red-bellied woodpecker and the three climatic factors of precipitation, vapor pressure, and potential evapotranspiration were examined using the method of Pearson linear regression analysis. The results indicated that the three climatic factors have correlations with the richness of the breeding bird species but in different modes, e.g., strong correlations for the non-migratory species but weak correlations for the migratory species.

scholarly journals North American Breeding Bird Survey status and trend estimates to inform a wide-range of conservation needs, using a flexible Bayesian hierarchical generalized additive model

2020 ◽  
Author(s):  
Adam C. Smith ◽  
Brandon P.M. Edwards
Keyword(s):  
Statistical Model ◽  
North American ◽  
Breeding Bird Survey ◽  
Breeding Bird ◽  
Bayesian Hierarchical ◽  
The North ◽  
Smooth Component ◽  
Bird Survey ◽  
Wide Range ◽  
Predictive Fit

ABSTRACTThe status and trend estimates derived from the North American Breeding Bird Survey (BBS), are critical sources of information for bird conservation. However, the estimates are partly dependent on the statistical model used. Therefore, multiple models are useful because not all of the varied uses of these estimates (e.g. inferences about long-term change, annual fluctuations, population cycles, recovery of once declining populations) are supported equally well by a single statistical model. Here we describe Bayesian hierarchical generalized additive models (GAM) for the BBS, which share information on the pattern of population change across a species’ range. We demonstrate the models and their benefits using data a selection of species; and we run a full cross-validation of the GAMs against two other models to compare predictive fit. The GAMs have better predictive fit than the standard model for all species studied here, and comparable predictive fit to an alternative first difference model. In addition, one version of the GAM described here (GAMYE) estimates a population trajectory that can be decomposed into a smooth component and the annual fluctuations around that smooth. This decomposition allows trend estimates based only on the smooth component, which are more stable between years and are therefore particularly useful for trend-based status assessments, such as those by the IUCN. It also allows for the easy customization of the model to incorporate covariates that influence the smooth component separately from those that influence annual fluctuations (e.g., climate cycles vs annual precipitation). For these reasons and more, this GAMYE model is a particularly useful model for the BBS-based status and trend estimates.LAY SUMMARYThe status and trend estimates derived from the North American Breeding Bird Survey are critical sources of information for bird conservation, but they are partly dependent on the statistical model used.We describe a model to estimate population status and trends from the North American Breeding Bird Survey data, using a Bayesian hierarchical generalized additive mixed-model that allows for flexible population trajectories and shares information on population change across a species’ range.The model generates estimates that are broadly useful for a wide range of common conservation applications, such as IUCN status assessments based on trends or changes in the rates of decline for species of concern; and the estimates have better or similar predictive accuracy to other models., and

scholarly journals On selection-regulated population dynamics in birds and mammals

2021 ◽  
Author(s):  
Lars Witting
Keyword(s):  
Growth Rate ◽  
Population Dynamics ◽  
Population Dynamic ◽  
North American ◽  
Dynamic Equilibrium ◽  
New Paradigm ◽  
Breeding Bird ◽  
The North ◽  
Dynamic Growth ◽  
Dynamic Growth Rate

I use the North American Breeding Bird Survey (Sauer et al. 2017) to construct 462 population trajectories with about 50 yearly abundance estimates each. Applying AIC model-selection, I find that selection-regulated population dynamics is 25,000 (95%:0.42-1.7e17) times more probable than density-regulated growth. Selection is essential in 94% of the best models explaining 82% of the population dynamics variance across the North American continent. Similar results are obtained for 111, 215, and 420 populations of British birds (BTO 2020), Danish birds (DOF 2020), and birds and mammals in the Global Population Dynamic Database (GPDD 2010). The traditional paradigm---that the population dynamic growth rate is a function of the environment, with maximal per-capita growth at low population densities, and sub-optimal reproduction from famine at carrying capacities with strong competition for limited resources---is not supported. Selection regulation generates a new paradigm where the world is green and individuals are selected to survive and reproduce at optimal levels at population dynamic equilibria with sufficient resources. It is only the acceleration of the population dynamic growth rate, and not the growth rate itself, that is determined by the density-dependent environment, with maximal growth occurring at the densities of the population dynamic equilibrium.

scholarly journals Use of North American Breeding Bird Survey data in avian conservation assessments

The Condor ◽  
2017 ◽  
Vol 119 (3) ◽  
pp. 594-606 ◽  
Author(s):  
Kenneth V. Rosenberg ◽  
Peter J. Blancher ◽  
Jessica C. Stanton ◽  
Arvind O. Panjabi
Keyword(s):  
Survey Data ◽  
North American ◽  
Breeding Bird Survey ◽  
Avian Conservation ◽  
Breeding Bird ◽  
Bird Survey ◽  
Conservation Assessments
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