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Challenges in the Quest for Keystones
Mary E. Power is a professor in the Department of Integrative Biology, University of California, Berkeley, CA 94720. David Tilman is a professor in the Department of Ecology, Evolution, and Behavior,
The impact of the shadow effect on the two methods most commonly used in applied population ecology to estimate the size of closed populations: Lincoln-Petersen and multiple-recapture estimators in program CAPTURE are evaluated.
The One‐Migrant‐per‐Generation Rule in Conservation and Management
It is suggested that a minimum of I and a maximum of 10 migrants per generation would be an appro- priate general rule of thumb for genetic purposes, bearing in mind that fctctors other than genetics influence the ideal level of connectivity.
The Keystone-Species Concept in Ecology and ConservationManagement and policy must explicitly consider the complexity of interactions in natural systems
The term keystone species has enjoyed an enduring popularity in the ecological literature since its introduction by Robert T. Paine in 1969 and it is implicit that these species are exceptional, relative to the rest of the community, in their importance.
What Is Missing in Amphibian Decline Research: Insights from Ecological Sensitivity Analysis
Two types of ecological sensitivity analysis were used to determine which vital rates have the strongest influence on the population dynamics of western toads, red-legged frogs, and common frogs that have declined in all or portions of their ranges.
Life Stage Simulation Analysis: Estimating Vital-Rate Effects on Population Growth for Conservation
We developed a simulation method, known as life-stage simulation analysis (LSA) to measure potential effects of uncertainty and variation in vital rates on population growth (λ) for purposes of
Conservation of Wildlife Populations: Demography, Genetics, and Management
The Big Picture: Human population dynamics meets applied population biology meets Applied population biology, and the simplest way to describe and project population growth: exponential and geometric change.
Sensitivity analysis to guide population recovery : Prairie-chickens as an example
Calculation of elasticities in matrix population models is a formal type of sensitivity analysis that is used increasingly to guide recovery of declining populations. Results presumably allow
Emerging Issues in Population Viability Analysis
It is concluded that PVA is a powerful tool in conservation biology for comparing alternative research plans and relative extinction risks among species, but caution is suggested in its use.
Managing Multiple Vital Rates To Maximize Greater Sage Grouse Population Growth
Sensitivity analyses suggest that, in contrast to most other North American galliforms, female survival is as important for population growth as chick survival and more important than nest success.