William Link, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 44
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Filter Total Items: 128
The North American Breeding Bird Survey 1966–2011: Summary analysis and species accounts The North American Breeding Bird Survey 1966–2011: Summary analysis and species accounts
The North American Breeding Bird Survey is a roadside, count-based survey conducted by volunteer observers. Begun in 1966, it now is a primary source of information on spatial and temporal patterns of population change for North American birds. We analyze population change for states, provinces, Bird Conservation Regions, and the entire survey within the contiguous United States and...
Authors
John R. Sauer, William A. Link, Jane E. Fallon, Keith L. Pardieck, David J. Ziolkowski
Population size, survival, growth, and movements of Rana sierrae Population size, survival, growth, and movements of Rana sierrae
Based on 2431 captures of 757 individual frogs over a 9-yr period, we found that the population of R. sierrae in one meadow–stream complex in Yosemite National Park ranged from an estimated 45 to 115 adult frogs. Rana sierrae at our relatively low elevation site (2200 m) grew at a fast rate (K = 0.73–0.78), had high overwintering survival rates (44.6–95%), lived a long time (up to 16 yr)...
Authors
Gary M. Fellers, Patrick M. Kleeman, David A. W. Miller, Brian J. Halstead, William A. Link
On thinning of chains in MCMC On thinning of chains in MCMC
1. Markov chain Monte Carlo (MCMC) is a simulation technique that has revolutionised the analysis of ecological data, allowing the fitting of complex models in a Bayesian framework. Since 2001, there have been nearly 200 papers using MCMC in publications of the Ecological Society of America and the British Ecological Society, including more than 75 in the journal Ecology and 35 in the...
Authors
William A. Link, Mitchell J. Eaton
Evaluating the demographic buffering hypothesis with vital rates estimated for Weddell seals from 30years of mark-recapture data Evaluating the demographic buffering hypothesis with vital rates estimated for Weddell seals from 30years of mark-recapture data
1. Life‐history theory predicts that those vital rates that make larger contributions to population growth rate ought to be more strongly buffered against environmental variability than are those that are less important. Despite the importance of the theory for predicting demographic responses to changes in the environment, it is not yet known how pervasive demographic buffering is in...
Authors
J.J. Rotella, William A. Link, T. Chambert, G.E. Stauffer, R.A. Garrott
Analysis of the North American Breeding Bird Survey using hierarchical models Analysis of the North American Breeding Bird Survey using hierarchical models
We analyzed population change for 420 bird species from the North American Breeding Bird Survey (BBS) using a hierarchical log-linear model and compared the results with those obtained through route-regression analysis. Survey-wide trend estimates based on the hierarchical model were generally more precise than estimates from the earlier analysis. No consistent pattern of differences...
Authors
John R. Sauer, William Link
Estimating age from recapture data: Integrating incremental growth measures with ancillary data to infer age-at-length Estimating age from recapture data: Integrating incremental growth measures with ancillary data to infer age-at-length
Estimating the age of individuals in wild populations can be of fundamental importance for answering ecological questions, modeling population demographics, and managing exploited or threatened species. Significant effort has been devoted to determining age through the use of growth annuli, secondary physical characteristics related to age, and growth models. Many species, however...
Authors
Mitchell J. Eaton, William A. Link
Science and Products
Filter Total Items: 44
No results found.
Filter Total Items: 128
The North American Breeding Bird Survey 1966–2011: Summary analysis and species accounts The North American Breeding Bird Survey 1966–2011: Summary analysis and species accounts
The North American Breeding Bird Survey is a roadside, count-based survey conducted by volunteer observers. Begun in 1966, it now is a primary source of information on spatial and temporal patterns of population change for North American birds. We analyze population change for states, provinces, Bird Conservation Regions, and the entire survey within the contiguous United States and...
Authors
John R. Sauer, William A. Link, Jane E. Fallon, Keith L. Pardieck, David J. Ziolkowski
Population size, survival, growth, and movements of Rana sierrae Population size, survival, growth, and movements of Rana sierrae
Based on 2431 captures of 757 individual frogs over a 9-yr period, we found that the population of R. sierrae in one meadow–stream complex in Yosemite National Park ranged from an estimated 45 to 115 adult frogs. Rana sierrae at our relatively low elevation site (2200 m) grew at a fast rate (K = 0.73–0.78), had high overwintering survival rates (44.6–95%), lived a long time (up to 16 yr)...
Authors
Gary M. Fellers, Patrick M. Kleeman, David A. W. Miller, Brian J. Halstead, William A. Link
On thinning of chains in MCMC On thinning of chains in MCMC
1. Markov chain Monte Carlo (MCMC) is a simulation technique that has revolutionised the analysis of ecological data, allowing the fitting of complex models in a Bayesian framework. Since 2001, there have been nearly 200 papers using MCMC in publications of the Ecological Society of America and the British Ecological Society, including more than 75 in the journal Ecology and 35 in the...
Authors
William A. Link, Mitchell J. Eaton
Evaluating the demographic buffering hypothesis with vital rates estimated for Weddell seals from 30years of mark-recapture data Evaluating the demographic buffering hypothesis with vital rates estimated for Weddell seals from 30years of mark-recapture data
1. Life‐history theory predicts that those vital rates that make larger contributions to population growth rate ought to be more strongly buffered against environmental variability than are those that are less important. Despite the importance of the theory for predicting demographic responses to changes in the environment, it is not yet known how pervasive demographic buffering is in...
Authors
J.J. Rotella, William A. Link, T. Chambert, G.E. Stauffer, R.A. Garrott
Analysis of the North American Breeding Bird Survey using hierarchical models Analysis of the North American Breeding Bird Survey using hierarchical models
We analyzed population change for 420 bird species from the North American Breeding Bird Survey (BBS) using a hierarchical log-linear model and compared the results with those obtained through route-regression analysis. Survey-wide trend estimates based on the hierarchical model were generally more precise than estimates from the earlier analysis. No consistent pattern of differences...
Authors
John R. Sauer, William Link
Estimating age from recapture data: Integrating incremental growth measures with ancillary data to infer age-at-length Estimating age from recapture data: Integrating incremental growth measures with ancillary data to infer age-at-length
Estimating the age of individuals in wild populations can be of fundamental importance for answering ecological questions, modeling population demographics, and managing exploited or threatened species. Significant effort has been devoted to determining age through the use of growth annuli, secondary physical characteristics related to age, and growth models. Many species, however...
Authors
Mitchell J. Eaton, William A. Link