Zobrazeno 1 - 10
of 378
pro vyhledávání: '"Douglas H. Johnson"'
Publikováno v:
Global Ecology and Conservation, Vol 46, Iss , Pp e02629- (2023)
Recent declines of grassland bird populations in North America are linked to habitat loss and fragmentation associated with agricultural practices. One tool used to conserve soil, water and wildlife habitat on agricultural fields is the U.S. Departme
Externí odkaz:
https://doaj.org/article/9a729729fada421b9e807170ca9d95f7
Autor:
Jake M. Ferguson, Laura Jiménez, Aislyn A. Keyes, Austen Hilding, Michael A. McCartney, Katherine St. Clair, Douglas H. Johnson, John R. Fieberg
Publikováno v:
PeerJ, Vol 11, p e15528 (2023)
Abundance surveys are commonly used to estimate plant or animal densities and frequently require estimating detection probabilities to account for imperfect detection. The estimation of detection probabilities requires additional measurements that ta
Externí odkaz:
https://doaj.org/article/dfe999ca9c8e4a43ae666d57c04d4f7e
Autor:
Lisa H. Elliott, Annie M. Bracey, Gerald J. Niemi, Douglas H. Johnson, Thomas M. Gehring, Erin E. Gnass Giese, Giuseppe E. Fiorino, Robert W. Howe, Gregory J. Lawrence, Christopher J. Norment, Douglas C. Tozer, Lawrence D. Igl
Publikováno v:
Ecosphere, Vol 14, Iss 5, Pp n/a-n/a (2023)
Abstract Species often exhibit regionally specific habitat associations, so habitat association models developed in one region might not be accurate or even appropriate for other regions. Three programs to survey wetland‐breeding birds covering (re
Externí odkaz:
https://doaj.org/article/5e4640080c59428892a76638d8444d1e
Autor:
Jay E. Diffendorfer, Jessica C. Stanton, Julie A. Beston, Wayne E. Thogmartin, Scott R. Loss, Todd E. Katzner, Douglas H. Johnson, Richard A. Erickson, Matt D. Merrill, Margo D. Corum
Publikováno v:
Ecosphere, Vol 12, Iss 6, Pp n/a-n/a (2021)
Abstract A central challenge in applied ecology is understanding the effect of anthropogenic fatalities on wildlife populations and predicting which populations may be particularly vulnerable and in greatest need of management attention. We used thre
Externí odkaz:
https://doaj.org/article/2f25c8c6905e402a8a46d2d3c274f5c2
Publikováno v:
PeerJ, Vol 8, p e9089 (2020)
Ecological data often violate common assumptions of traditional parametric statistics (e.g., that residuals are Normally distributed, have constant variance, and cases are independent). Modern statistical methods are well equipped to handle these com
Externí odkaz:
https://doaj.org/article/6bd6d0258e7f48cb938b14dc8afa0e12
Autor:
Kevin W. Heist, Tim S. Bowden, Jake Ferguson, Nathan A. Rathbun, Erik C. Olson, Daniel C. Nolfi, Rebecca Horton, Jeffrey C. Gosse, Douglas H. Johnson, Michael T. Wells
Publikováno v:
Movement Ecology, Vol 6, Iss 1, Pp 1-14 (2018)
Abstract Background Millions of flying migrants encounter the Great Lakes and other large water bodies on long-distance flights each spring and fall, but quantitative data regarding how they traverse these obstacles are limited. Shorelines are known
Externí odkaz:
https://doaj.org/article/cf30ab08f50b45729b34feacf2af321d
Autor:
Hannu Pöysä, Jukka Rintala, Douglas H. Johnson, Jukka Kauppinen, Esa Lammi, Thomas D. Nudds, Veli‐Matti Väänänen
Publikováno v:
Ecology and Evolution, Vol 6, Iss 19, Pp 7004-7014 (2016)
Abstract Density dependence, population regulation, and variability in population size are fundamental population processes, the manifestation and interrelationships of which are affected by environmental variability. However, there are surprisingly
Externí odkaz:
https://doaj.org/article/67a068fdcc8c49c5a2abe0ec1a8a5b10
Publikováno v:
Human-Wildlife Interactions, Vol 10, Iss 1 (2017)
Three recent publications have estimated the number of birds killed each year by wind energy facilities at 2012 build-out levels in the United States. The 3 publications differ in scope, methodology, and resulting estimates. We compare and contrast c
Externí odkaz:
https://doaj.org/article/1d58476873fe4c20916a23d0afe2d066
Publikováno v:
Avian Conservation and Ecology, Vol 14, Iss 1, p 14 (2019)
Conservationists have long been concerned about population declines among both woodland and grassland birds, especially those that require extensive areas of a preferred habitat type and avoid mixed habitats. Of the two groups, grassland species have
Externí odkaz:
https://doaj.org/article/34fc8c2454fc4bc8877caa92a2522d2f
Publikováno v:
Avian Conservation and Ecology, Vol 11, Iss 2, p 1 (2016)
There is persistent interest in understanding responses of passerine birds to habitat fragmentation, but research findings have been inconsistent and sometimes contradictory in conclusions about how birds respond to characteristics of sites they occu
Externí odkaz:
https://doaj.org/article/02da91f272284f30bf951579ea10a3e2