Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Christine G. Niwa"'
Publikováno v:
Ecoscience. 13:44-55
We investigated herbaceous richness and cover in relation to fire season and severity, and other variables, five growing seasons following prescribed fires. Data were collected from six stands consisting of three randomly applied treatments: no burn,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bfa45052ad8ff7c3969a688280134573
https://doi.org/10.2980/1195-6860(2006)13[44:sasopb]2.0.co
https://doi.org/10.2980/1195-6860(2006)13[44:sasopb]2.0.co
Autor:
Robert W. Peck, Christine G. Niwa
Publikováno v:
Environmental Entomology. 34:646-655
Microarthropod densities within late-successional coniferous forests thinned 16–41 yr before sampling were compared with adjacent unthinned stands to identify longer term effects of thinning on this community. Soil and forest floor layers were samp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6424b3f47f9dad3e42ae573528312229
https://doi.org/10.1603/0046-225x-34.3.646
https://doi.org/10.1603/0046-225x-34.3.646
Publikováno v:
Pedobiologia. 49:109-118
Summary We studied the composition of a litter detrital community in a temperate coniferous forest using stable isotopes of nitrogen and carbon. Samples of mineral soil, bulk litter material, macroarthropods and understory plants were collected from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ebf7264908d52993f657b322ed4bd54
https://doi.org/10.1016/j.pedobi.2004.09.002
https://doi.org/10.1016/j.pedobi.2004.09.002
Autor:
Andrew Youngblood, M. Taratoot, Roger D. Ottmar, J.D. McIver, Paul W. Adams, L. D. Kellogg, E.S. Drews, Bruce R. Hartsough, J.A. Doyal, T. Torgersen, Christine G. Niwa, R. Peck
Publikováno v:
Western Journal of Applied Forestry. 18:238-249
Fuel reduction by mechanical thinning and removal was studied in mixed-conifer stands in northeastern Oregon between 1995 and 1997. A single-grip harvester was coupled with either a forwarder or a skyline yarding system, and operational economics, fu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f1c6efb8f52c37f199f678f1a487803
https://doi.org/10.1093/wjaf/18.4.238
https://doi.org/10.1093/wjaf/18.4.238
Publikováno v:
Environmental Entomology. 30:993-998
The kairomonal responses of Thanasimus undatulus (Say), Enoclerus sphegeus F., and Temnochila chlorodia (Mannerheim) to semiochemicals used by Dendroctonus pseudotsugae Hopkins, D. rufipennis Kirby, D. brevicomis LeConte, D. ponderosae Hopkins, and I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d13f80affdabbdfa4a5515b357f6a3a
https://doi.org/10.1603/0046-225x-30.6.993
https://doi.org/10.1603/0046-225x-30.6.993
Publikováno v:
The Canadian Entomologist. 132:345-351
Synthetic sex pheromones released in a loblolly pine, Pinus taeda L. (Pinaceae), seed orchard interfered with the ability of male coneworm moths, Dioryctria Zeller spp. (Lepidoptera: Pyralidae), to locate traps baited with sex pheromones or live fema
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0274574129805e52cc1e66b6e90de29a
https://doi.org/10.4039/ent132345-3
https://doi.org/10.4039/ent132345-3
Autor:
Christine G. Niwa
Publikováno v:
Journal of Economic Entomology. 88:955-958
Four colors and 3 types of colored sticky panels were tested for effectiveness in monitoring adults of Megastigmus spennotrophus Wachtl. Panels (gold Rebell) were used to catch chalcids in 44 seed orchard blocks over a 4-yr period. Although the relat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d0251f6d333d809d3f94b9d656bac4a
https://doi.org/10.1093/jee/88.4.955
https://doi.org/10.1093/jee/88.4.955
Autor:
L. L. Sower, Christine G. Niwa
Publikováno v:
Environmental Entomology. 21:1410-1413
Chemical analyses and field bioassays were conducted to identify major components of the sex pheromone of the southwestern pine tip moth, Rhyacionia neomexicana (Dyar). E-9-dodecenyl acetate was the most abundant pheromone component in gland washes,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fc257fca5b3a85c4dac24e2cff772452
https://doi.org/10.1093/ee/21.6.1410
https://doi.org/10.1093/ee/21.6.1410
Autor:
David L. Overhulser, Christine G. Niwa
Publikováno v:
Journal of Economic Entomology. 85:2323-2328
An exclusion study was done in Oregon to determine the incidence of Megastigmus spermotrophus Wachtl in unfertilized Douglas-fir, Pseudotsuga menziesii (Mirbel) Franco, seed. Larvae were detected in seeds of cones, from which pollen was excluded, fro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::482215c207b5dda6194777dcb57fa512
https://doi.org/10.1093/jee/85.6.2323
https://doi.org/10.1093/jee/85.6.2323
Autor:
Darrell W. Ross, Christine G. Niwa
Publikováno v:
Western Journal of Applied Forestry. 12:52-54
Pheromone baits for the Douglas-fir beetle were applied alone and in combination with the antiaggregation pheromone, 3-methylcyclohex-2-en-1-one (MCH), to test potential treatments for creating snags to improve wildlife habitat. All baited trees were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10952fdb5fa532ae62fcde89682f31c9
https://doi.org/10.1093/wjaf/12.2.52
https://doi.org/10.1093/wjaf/12.2.52