Zobrazeno 1 - 10
of 58
pro vyhledávání: '"John C. Zasada"'
Publikováno v:
Forest Ecology and Management. 256:2110-2120
We examined spatial aspects of harvesting impacts on aspen regeneration at 25 sites in northern Minnesota. These sites had been clearcut or partially harvested 4–11 years ago. At each site, residual overstory, which was composed of trees other than
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c58ed09ea788579b83984a645b4e7a0c
https://doi.org/10.1016/j.foreco.2008.07.037
https://doi.org/10.1016/j.foreco.2008.07.037
Autor:
John C. Zasada, Kamal J.K. Gandhi, Steven A. Katovich, Daniel W. Gilmore, Steven J. Seybold, William J. Mattson
Publikováno v:
Forest Ecology and Management. 256:1104-1123
We studied the short-term effects of a catastrophic windstorm and subsequent salvage-logging and prescribed-burning fuel-reduction treatments on ground beetle (Coleoptera: Carabidae) assemblages in a sub-boreal forest in northeastern Minnesota, USA.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d999f6958e9742a2dc79a48f5f4080b
https://doi.org/10.1016/j.foreco.2008.06.011
https://doi.org/10.1016/j.foreco.2008.06.011
Publikováno v:
Forest Ecology and Management. 199:219-230
Both forest harvesting and browsing by white-tailed deer (Odocoileus virginianus Zimmerman) affect the composition and structure of forest vegetation throughout the eastern deciduous forest in the United States. We studied their affect and their inte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0f190d4fbe0126ca2e923a68502893a
https://doi.org/10.1016/j.foreco.2004.05.044
https://doi.org/10.1016/j.foreco.2004.05.044
Publikováno v:
The Forestry Chronicle. 78:539-549
A white pine (Pinus strobus L.) stand at the western margin of the species range, approximately 125 years of age at present, was thinned in 1953 from 33.5 m2 ha-1 to target residual basal areas of 18.4, 23.0, 27.5, and 32.1 m2 ha-1 . Repeated measure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22367f78f0a3e049425773031227e968
https://doi.org/10.5558/tfc78539-4
https://doi.org/10.5558/tfc78539-4
Autor:
John C. Zasada, Russel S. Ramsewak, Sorimuthu Murugesan, William J. Mattson, Muraleedharan G. Nair
Publikováno v:
Journal of Agricultural and Food Chemistry. 49:5852-5856
Five compounds, 1-5, were isolated from the seed hexane extract of Dirca palustris. Compounds 1-3 were triglycerides, and 4 and 5 were linoleic and oleic acids, respectively. Compounds 1-3 were not biologically active; however, 4 (linoleic acid) and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c2bbcb5b647588c44018a2280fefe66a
https://doi.org/10.1021/jf010806y
https://doi.org/10.1021/jf010806y
Salmonberry and salal annual aerial stem production: the maintenance of shrub cover in forest stands
Publikováno v:
Canadian Journal of Forest Research. 31:1629-1638
Annual sprouting of aerial stems and ramets enables populations of salmonberry (Rubus spectabilis Pursh), salal (Gaultheria shallon Pursh), and probably other forest shrubs to maintain dense covers (>20 000 stems/ha). We studied annual stem productio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a457bc45699e25e8d60086274c7729f
https://doi.org/10.1139/x01-081
https://doi.org/10.1139/x01-081
Publikováno v:
The Forestry Chronicle. 77:525-532
Quaking aspen (Populus tremuloides Michx.) is a remarkable species that performs several significant ecological roles throughout its range while at the same time is facing ever-increasing harvesting pressure. Although its full product potential remai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::45a216fd6f9954454f613b2ad363fb64
https://doi.org/10.5558/tfc77525-3
https://doi.org/10.5558/tfc77525-3
Publikováno v:
Agricultural and Forest Meteorology. 106:331-336
The thermal environment of clear-cut, partially cut, and uncut forest sites in northern Wisconsin are examined for a warm year and a cool year. Temperatures at 0.5 m above and 0.05m below ground, as well as base 5 degree C heat sums are computed for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::692b9eb02862fcce7f17132c616a7bf3
https://doi.org/10.1016/s0168-1923(00)00220-3
https://doi.org/10.1016/s0168-1923(00)00220-3
Publikováno v:
The Forestry Chronicle. 76:743-746
With a current yearly output of $241 million per year nontimber forest products (NTFP) contribute significantly to the welfare of rural and First Nations communities in Canada. Maple sap products, wild mushrooms and wild fruits are the most important
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e970fcac9c1c1ee9bbe573597629f0aa
https://doi.org/10.5558/tfc76743-5
https://doi.org/10.5558/tfc76743-5
Autor:
David L. DeWitt, John C. Zasada, William G. Mattson, Muraleedharan G. Nair, Russel S. Ramsewak
Publikováno v:
Journal of Natural Products. 62:1558-1561
Five novel phenolic glycosides (1-5) were isolated from the MeOH extract of the dried twigs of Dirca palustris, as confirmed by their (1)H NMR, (13)C NMR, and MS data. Compounds 1-3 were not active against cyclooxygenase I (COX-I), but compound 4 (20
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3d99e42affc406c1cd408f1aabfeb46
https://doi.org/10.1021/np9903595
https://doi.org/10.1021/np9903595