خيارات البحث
النتائج 1 - 10 من 13
Erosion effects of air pollution on needle surfaces.
1986
Karhu M. | Huttunen S.
Forest health research on a natural air pollution gradient in the San Bernardino Mountains, Southern California
2002
Arbaugh, M.J. | Alonso, R. | Bytnerowicz, A. (USDA Forest Service, Riverside (USA). Pacific Southwest Research Station)
Toxic effects of photochemical smog on ponderosa and Jeffrey pines in the San Bernardino Mountains were discovered in the 1950s. It was revealed that ozone is the main cause of foliar injury manifested as chlorotic mottle and premature needle senescence. Various morphological, physiological and biochemical alterations in the affected plants have been reported over a period of about 40 years of multidisciplinary research. Recently, the focus of research has shifted from studying the effects of ozone to multiple pollutant effects. Recent studies have indicated that the combination of ozone and nitrogen may alter biomass allocation in pines towards that of deciduous trees, accelerate litter accumulation and increase carbon sequestration rates in heavily polluted forests
اظهر المزيد [+] اقل [-]Photochemical oxidant pollution and vegetation: effects of mixtures of gases, fog and particles
1989
Olszyk, D.M. | Bytnerowicz, A. | Takemoto, B.K. (Statewide Air Pollution Research Center, University of California, Riverside, CA 92521 (USA))
Nitrogen deposition in California forests: a review
1996
Bytnerowicz, A. | Fenn, M.E. (Pacific Southwest Research Station, USDA-Forest Service, Forest Fire Laboratory, 4955 Canyon Crest Drive, Riverside, CA 92507 (USA))
Effects of simulated acid rain and ozone on foliar chemistry of field-grown Pinus ponderosa seedlings and mature trees
1996
Momen, B. | Helms, J.A. (Department of Environmental Science, University of California, Berkeley, California 94720 (USA))
Seasonal and annual distribution of organic contaminants in marine sediments from Elkhorn Slough, Moss Landing Harbor and nearshore Monterey Bay, California
1993
Rice, D.W. | Seltenrich, C.P. | Spies, R.B. | Keller, M.L. (Lawrence Livermore National Laboratory, Livermore, CA 94550 (USA))
Nitrate reductase activity as an indicator of ponderosa pine response to atmospheric nitrogen deposition in the San Bernardino mountains
1996
Krywult, M. | Karolak, A. | Bytnerowicz, A. (W. Szafer Institute of Botany, Polish Academy of Sciences, ul. Lubicz 46, 31-512, Cracow (Poland))
Yield loss assessments for cultivars of broccoli, lettuce, and onion exposed to ozone
1990
Temple, P.J. | Jones, T.E. | Lennox, R.W. (Statewide Air Pollution Research Center, University of California, Riverside, CA 92521 (USA))
Dissipation of s-triazines and thiocarbamates from soil as related to soil moisture content
1990
Singh, G. | Spenser, W.F. | Cliath, M.M. | Genuchlen, M.Th. van (USDA-ARS, Dep. Soil and Environmental Sci., Univ. Calfornia, Riverside, California 92521 (USA))
Pollen germination is impeded by tap water
1990
Hoffmann, F. | Martin, B.A. | Sibley, R.B. | Tsay, S.S. (Department of Developmental and Cell Biology, University of California, Irvine, CA 92717 (USA))
