خيارات البحث
النتائج 131 - 140 من 306
Species and ecosystem level bioindicators of airborne pollution: an analysis of two major studies
1981
Grodzinski, W. (Jagiellonian Univ., Krakow (Poland). Dept. of Animal Ecology) | Yorks, T.P. (Colorado State Univ., Fort Collins, CO (USA). Natural Resource Ecology Lab.)
Bioindication of air pollution effects has received considerable attention in recent years. It has been almost entirely focused on individual species and relatively little notice has been given to ecosystem level process and function monitors. Longterm research projects in the Niepolomice Forest in southern Poland and the Colstrip area in southeast Montana, U.S.A., were analyzed for both organismic and system level indicators and monitors for SO, trace elements, and fluoride pollution originating in nearby coal-fired industrial processes. Species of lichens exhibited changes in morphology and survival and pine species exhibited pollutant accumulation in needles at both sites. Declines in Scots pine growth in Poland of up to 20% were compared with declines in western wheatgrass rhizome biomass in Montana to illustrate system wide effects on primary productivity. Directly observable declines in decomposition rate were noted for both sites at higher pollution levels and tied to system wide occurrences of nutrient deficiency and toxicant buildup in soil pools. Pollutant increases in deer antler composition, changes in grasshopper dietary patterns, and lichen density and health were postulated to have system level implications as well
اظهر المزيد [+] اقل [-]Groundwater resources
1981
Mandel, S. (Samuel) | Shiftan, Z. L.
[Contamination of cattle products by pesticides with a high residual power]
1981
Siebald S, E. (Instituto de Investigaciones Agropecuarias, Osorno (Chile). Estacion Experimental Remehue)
[Lead contamination in leaf vegetables]
1981
Guerrero V, J. (Universidad de Santiago (Chile). Escuela Tecnologica. Dept. Tecnologias Agropecuarias)
[Contribution of the Institute of Agricultural Research to the problem of environmental pollution [Research Institutions, Chile]]
1981
Novoa, R.
[Tailings and outflows of large copper mineral processing plants. Environmental impact]
1981
Merino B, R.
Tree rings and air pollution: a case study of Pinus monophylla growing in east-central Nevada
1981
Thompson, M.A. (Lab. Tree-Ring Res., Univ. Arizona, Tucson AZ 85721 (USA))
Wastewater treatment and disposal: engineering and ecology in pollution control.
1981
Arceivala S. J.
Heavy metal pollution in soils of Japan
1981
Kitagishi, Kakuzō | Yamane, Ichirō | 北岸, 確三(1919-) | 山根, 一郎(1920-)
