scholarly journals Evaluating vital rate contributions to greater sage‐grouse population dynamics to inform conservation

Ecosphere ◽  
2016 ◽  
Vol 7 (3) ◽  
Author(s):  
David K. Dahlgren ◽  
Michael R. Guttery ◽  
Terry A. Messmer ◽  
Danny Caudill ◽  
Robert Dwayne Elmore ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Vital Rate ◽  
Sage Grouse

scholarly journals Sage‐Grouse Population Dynamics are Adversely Affected by Overabundant Feral Horses

2021 ◽  
Vol 85 (6) ◽  
pp. 1132-1149
Author(s):  
Peter S. Coates ◽  
Shawn T. O'neil ◽  
Diana A. MuÑoz ◽  
Ian A. Dwight ◽  
John C. Tull
Keyword(s):  
Population Dynamics ◽  
Sage Grouse ◽  
Feral Horses

Greater Sage-Grouse Population Dynamics and Probability of Persistence

2011 ◽  
pp. 292-379 ◽  
Author(s):  
Edward O. Garton ◽  
John W. Connelly ◽  
Jon S. Horne ◽  
Christian A. Hagen ◽  
Ann Moser ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Sage Grouse

scholarly journals Patterns in Greater Sage-grouse population dynamics correspond with public grazing records at broad scales

2017 ◽  
Vol 27 (4) ◽  
pp. 1096-1107 ◽  
Author(s):  
Adrian P. Monroe ◽  
Cameron L. Aldridge ◽  
Timothy J. Assal ◽  
Kari E. Veblen ◽  
David A. Pyke ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Sage Grouse

scholarly journals Size-by-environment interactions: a neglected dimension of species’ responses to environmental variation

2018 ◽  
Author(s):  
Andrew T. Tredennick ◽  
Brittany J. Teller ◽  
Peter B. Adler ◽  
Giles Hooker ◽  
Stephen P. Ellner
Keyword(s):  
Population Dynamics ◽  
Functional Form ◽  
Survival Rates ◽  
Vital Rate ◽  
Vital Rates ◽  
Size Dependent ◽  
Fluctuating Environments ◽  
The Impact ◽  
The Relationship

AbstractIn both plant and animal systems, size can determine whether an individual survives and grows under different environmental conditions. However, it is less clear whether and when size-dependent responses to the environment affect population dynamics. Size-by-environment interactions create pathways for environmental fluctuations to influence population dynamics by allowing for negative covariation between sizes within vital rates (e.g., small and large individuals have negatively covarying survival rates) and/or size-dependent variability in a vital rate (e.g., survival of large individuals varies less than small individuals through time). Whether these phenomena affect population dynamics depends on how they are mediated by elasticities (they must affect the sizes and vital rates that matter) and their projected impacts will depend on model functional form (the impact of reduced variance depends on the relationship between the environment and vital rate). We demonstrate these ideas with an analysis of fifteen species from five semiarid plant communities. We find that size-by-environment interactions are common but do not impact long-term population dynamics. Size-by-environment interactions may yet be important for other species. Our approach can be applied to species in other ecosystems to determine if and how size-by-environment interactions allow them to cope with, or exploit, fluctuating environments.

scholarly journals An integrated modeling approach to estimating Gunnison sage‐grouse population dynamics: combining index and demographic data

2014 ◽  
Vol 4 (22) ◽  
pp. 4247-4257 ◽  
Author(s):  
Amy J. Davis ◽  
Mevin B. Hooten ◽  
Michael L. Phillips ◽  
Paul F. Doherty
Keyword(s):  
Population Dynamics ◽  
Demographic Data ◽  
Integrated Modeling ◽  
Sage Grouse ◽  
Modeling Approach

scholarly journals The Importance of Environmental Variability and Transient Population Dynamics for a Northern Ungulate

2020 ◽  
Vol 8 ◽  
Author(s):  
Sophie L. Gilbert ◽  
Kris J. Hundertmark ◽  
Mark S. Lindberg ◽  
David K. Person ◽  
Mark S. Boyce
Keyword(s):  
Population Dynamics ◽  
Growth Rates ◽  
Environmental Variability ◽  
Black Bear ◽  
Vital Rate ◽  
Transient Dynamics ◽  
Elasticity Analysis ◽  
Fawn Survival ◽  
Management Actions ◽  
Female Survival

The pathways through which environmental variability affects population dynamics remain poorly understood, limiting ecological inference and management actions. Here, we use matrix-based population models to examine the vital rate responses to environmental variability and individual traits, and subsequent transient dynamics of the population in response to the environment. Using Sitka black-tailed deer (Odocoileus hemionus sitkensis) in Southeast Alaska as a study system, we modeled effects of inter-annual process variance of covariates on female survival, pregnancy rate, and fetal rate, and summer and winter fawn survival. To examine the influence of environmental variance on population dynamics, we compared asymptotic and transient perturbation analysis (elasticity analysis, a life-table response experiment, and transience simulation). We found that summer fawn survival was primarily determined by black bear (Ursus americanus) predation and was positively influenced by mass at birth and female sex. Winter fawn survival was determined by malnutrition in deep-snow winters and was influenced by an interaction between date of birth and snow depth, with late-born fawns at greater risk in deep-snow winters. Adult female survival was the most influential vital rate based on classic elasticity analysis, however, elasticity analysis based on process variation indicated that winter and summer fawn survival were most variable and thus most influential to variability in population growth. Transient dynamics produced by non-stable stage distributions produced realized annual growth rates different from predicted asymptotic growth rates in all years, emphasizing the importance of winter perturbations to population dynamics of this species.

Sign in / Sign up

Export Citation Format

Share Document