Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Mohammed A. Kalkhan"'
Autor:
Mohammed A. Kalkhan
Publikováno v:
Societal Dimensions of Environmental Science ISBN: 9781315166827
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1cc5269f8dfb73aa4a5075a304b1dbe3
https://doi.org/10.1201/9781315166827-2
https://doi.org/10.1201/9781315166827-2
Publikováno v:
Diversity and Distributions. 13:379-388
Geospatial statistical modelling and thematic maps have recently emerged as effective tools for the management of natural areas at the landscape scale. Traditional methods for the collection of field data pertaining to questions of landscape were dev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e675fca603afd9cd4570e71ab6bdcb1
https://doi.org/10.1111/j.1472-4642.2007.00333.x
https://doi.org/10.1111/j.1472-4642.2007.00333.x
Publikováno v:
Applied Soil Ecology. 35:622-634
Rocky Mountain National Park (RMNP), Colorado, USA, contains a diversity of plant species. However, many exotic plant species have become established, potentially impacting the structure and function of native plant communities. Our goal was to quant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::726e42639c4c39100d44f5049fbdcffe
https://doi.org/10.1016/j.apsoil.2006.09.009
https://doi.org/10.1016/j.apsoil.2006.09.009
Autor:
N. Thompson Hobbs, Mark R. Campbell, Daniel J. Manier, Mohammed A. Kalkhan, Robin M. Reich, David M. Theobald
Publikováno v:
Landscape Ecology. 20:1-17
Invasion of grasslands by woody plants has been identified as a key indicator of changes in ecosystem structure and function in arid and semi-arid rangelands throughout the world. We investigated changes in the balance between woody and herbaceous co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ee1772184e76d11984bc80d06360443
https://doi.org/10.1007/s10980-004-3987-4
https://doi.org/10.1007/s10980-004-3987-4
Autor:
Yuka Otsuki, Cynthia A. Villa, Lisa D. Schell, Thomas J. Stohlgren, Kelly A. Rimar, Michelle Lee, Mohammed A. Kalkhan, Geneva W. Chong
Publikováno v:
Environmental Management. 29:566-577
Basic information on where nonnative plant spe- cies have successfully invaded is lacking. We assessed the vulnerability of 22 vegetation types (25 sets of four plots in nine study areas) to nonnative plant invasions in the north- central United Stat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c775847505dcd65a45dab4e50f5f0df9
https://doi.org/10.1007/s00267-001-0006-2
https://doi.org/10.1007/s00267-001-0006-2
Publikováno v:
Landscape Ecology. 17:341-354
We determined changes in willow (Salixspp.) cover in two valleys of the eastern slope of Rocky Mountain National Park,Colorado, USA, and related these changes to suspected causative factors. Changes in vegetation were inferred from digital maps gener
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19a7d14223322b650628d81faad5d48e
https://doi.org/10.1023/a:1020530710891
https://doi.org/10.1023/a:1020530710891
Publikováno v:
Environmental Monitoring and Assessment. 64:591-605
Land managers need better techniques to assess exotic plant invasions. We used the cross-correlation statistic, IYZ, to test for the presence of spatial cross-correlation between pair- wise combinations of soil characteristics, topographic variables,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::196825f6174080ca98de18dcc3ccbd06
https://doi.org/10.1023/a:1006329707198
https://doi.org/10.1023/a:1006329707198
Autor:
Gregory J. Newman, Thomas J. Stohlgren, Kelly A. Bull, Lisa D. Schell, Geneva W. Chong, Yuka Otsuki, Mohammed A. Kalkhan, Michael A. Bashkin, Yowhan Son, Dan Binkley
Publikováno v:
Ecological Monographs. 69:25-46
Some theories and experimental studies suggest that areas of low plant spe- cies richness may be invaded more easily than areas of high plant species richness. We gathered nested-scale vegetation data on plant species richness, foliar cover, and freq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed57052b9940f08e3f70b3eaf98d36f3
https://doi.org/10.1890/0012-9615(1999)069[0025:epsihs]2.0.co
https://doi.org/10.1890/0012-9615(1999)069[0025:epsihs]2.0.co
Publikováno v:
International Journal of Remote Sensing. 19:2049-2060
Double sampling was used to provide a cost efficient estimate of the accuracy of a Landsat Thematic Mapper (TM) classification map of a scene located in the Rocky Mountain National Park, Colorado. In the first phase, 200 sample points were randomly s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ee7c92f120daa3d094030e66579b493
https://doi.org/10.1080/014311698214857
https://doi.org/10.1080/014311698214857
Publikováno v:
Ecological Applications. 7:1064-1074
Only a small portion of any landscape can be sampled for vascular plant diversity because of constraints of cost (salaries, travel time between sites, etc.). Often, the investigator decides to reduce the cost of creating a vegetation map by increasin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f5785c4f67ac76d0e32af23df1b080a
https://doi.org/10.1890/1051-0761(1997)007[1064:msopde]2.0.co
https://doi.org/10.1890/1051-0761(1997)007[1064:msopde]2.0.co