2 edition of Influence of 2,3,7,8-tetrachlorodibenzo-p-dioxin on respiration in a forest floor and soil found in the catalog.
Influence of 2,3,7,8-tetrachlorodibenzo-p-dioxin on respiration in a forest floor and soil
Walter Beno Bollen
by Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station in [Portland, Or.]
Written in English
|Statement||Walter B. Bollen and Logan A. Norris.|
|Contributions||Norris, L. A., Pacific Northwest Forest and Range Experiment Station (Portland, Or.)., United States. Forest Service.|
|The Physical Object|
|Pagination||649-652 p ;|
|Number of Pages||652|
Most studies focused soil C quality change in forest floor, however, it remains unclear the effects of disturbance on C composition in mineral horizon, and specifically, if a difference exists between soil organic carbon (SOC) response to fire and harvest (Norris et al. ). forest floor (zero tension lysimeters) and at cm depth (Prenart suction lysimeters). Solutions are analyzed for ammonium, nitrate, phosphate, dissolved organic carbon (DOC) and dissolved organic nitrogen (DON). We also collect samples periodically to track changes in forest floor and soil organic matter and nutrient contents.
Sorption of 14C-labeled 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) to soils from water/methanol mixtures has been evaluated by batch shake testing. Uncontaminated soils from Times Beach, MO, were used in these experiments and ranged in fraction organic carbon (U+oc from to Volume fraction methanol in the liquid phase (U+s. While on a walk through a forest, you notice birds in trees, earthworms in the soil, and fungi on plant litter on the forest floor. Based on your observations, you conclude that each of these organisms occupies a different A) habitat. B) abiome. C) biosphere. D) biome. E) ecosystem.
2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a polychlorinated dibenzo-p-dioxin (sometimes shortened, though inaccurately, to simply 'dioxin') with the chemical formula C12 H 4 Cl 4 O TCDD is a colorless solid with no distinguishable odor at room temperature. It is usually formed as an unwanted product in burning processes of organic materials or as a side product in organic synthesis. The one with four chlorine atoms at positions 2, 3, 7 and 8 of the dibenzo-p- dioxin chemical structure is called 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD). It is a colorless solid with no known odor. 2,3,TCDD does not occur naturally nor is it intentionally manufactured by any industry, except as a reference standard.
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Influence of 2,3,7,8-Tetrachlorodibenzo-P-Dioxin on Respiration in a Forest Floor and Soil Walter B. Bollen and Logan A. Norris Forestry Sciences Laboratory, Pacific Northwest Forest and Range Experiment Station, Corvallis, Ore. Dioxin, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), one of the most toxic chemicals known, is an impurity.
Bull Environ Contam Toxicol. Jul;22() Influence of 2,3,7,8-tetrachlorodibenzo-p-dioxin on respiration in a forest floor and by: 6. Influence of 2,3,7,8-tetrachlorodibenzo-P-dioxin on respiration in a forest floor and soil. L.A. Influence of 2,3,7,8-tetrachlorodibenzo-P-dioxin on respiration in a forest floor and soil.
Bull. Environ. Contam. Toxicol. 22, Cited by: 6. 2,3,7,8‐tetrachlorodibenzo‐p‐dioxin exposure influence the expression of glutamate transporter GLT‐1 in C6 glioma cells via the Ca 2+ /protein kinase C pathway Jianya Zhao. Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, Nantong, Jiangsu, People's Republic of China Cited by: 2.
Influence of 2,3,7,8-Tetrachlorodibenzo-p-dioxin on the Antigen-Presenting Activity of Dendritic Cells. 2,3,7,8-Tetrachlorodibenzo-p-Dioxin (2,3,7,8,-TCDD) Hazard Summary 2,3,7,8-Tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) is formed as an unintentional by-product of incomplete combustion.
It may be released to the environment during the combustion of fossil fuels and wood, and during the incineration of municipal and industrial wastes.
The estimation of elimination rates of persistent compounds: a re-analysis of 2,3,7,8-tetrachlorodibenzo-p-dioxin levels in Vietnam veterans. Chemosphere 37(): It it useful to note that TCDD levels are strongly influenced by the age distribution of the population tested.
27 A Study of 2,3,7,8-Tetrachlorodibenzo-p-dioxin February The Blodgett Forest Environmental Monitoring Project - Final Report" BLACKBURN, A. B., M.D. "Review of the Effects of Agent Orange: A Psychiatric Perspective on the Controversy"; BOLLEN, W.
B., Norris, L. "Influence of 2,3,7,8-Tetrachlorodibenzo-p-Oioxin on Respiration in a Forest Floor and Soil" BONDERMAN, D. P., Mick, 0. L., Long, K. Soil respiration was estimated in immature aspen (Populus tremuloides Michx.
and P. grandidentata Michx.) ecosystems of eastern Ontario subjected to cutting and burning treatments in relation to vernal leaf respiration was measured as CO 2 evolved in situ using soda lime.
Respiration levels varied seasonally from a midsummer high of around mg CO 2 m −2 day −1. The mean soil respiration ranged from ± to ± μmol m –2 s –1, with an overall mean of ± μmol m –2 s –1 during the observation period. Soil respiration increased exponentially with 5-cm-depth soil temperature, generating a relatively high Q 10 value ().
Forest plantation, i.e., afforestation or reforestation, is an important silviculture and forest management practice around the world .Soil ecology of forest plantation plays an important role in several processes, e.g., improving nutrient cycling and soil fertility (N and P status) and forest productivity, and enhancing C sequestration, and has a potential impact in mitigating climate.
Get this from a library. Influence of 2,3,7,8-tetrachlorodibenzo-p-dioxin on respiration in a forest floor and soil. [Walter Beno Bollen; L A Norris; United States Pacific Northwest Forest and Experiment Station.; United States. Forest Service.]. Spatial and seasonal variation in soil respiration rates were investigated in a tropical dry forest in Thailand.
The spatial variation was examined at 50 points within a 2-ha plot in the forest floor during the dry and wet seasons. The seasonal and diurnal variations in soil respiration were measured at 16 and 5 points, respectively.
Jianya Zhao, Yan Zhang, Jianmei Zhao, Cheng Wang, Jiamin Mao, Ting Li, Xiaoke Wang, Xiaoke Nie, Shengyang Jiang, Qiyun Wu, 2,3,7,8‐tetrachlorodibenzo‐p‐dioxin exposure influence the expression of glutamate transporter GLT‐1 in C6 glioma cells via the Ca2+/protein kinase C pathway, Journal of Applied Toxicology, /jat, 36, Bollen W B, Norris L A.
Influence of 2,3,7,8-tetrachlorodibenzo-p-dioxin on respiration in a forest floor and soil. Bull Environ Contam Toxicol. ; – 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a colourless to white crystalline solid.
It belongs to the chlorinated dibenzo-p-dioxins (CDDs) group, which is a group of hydrocarbons that are similar in structure and occur as contaminants in chemical production, or as. Productivity and sustainability of tropical forest plantations greatly rely on regulation of ecosystem functioning and nutrient cycling, i.e., the link between plant growth, nutrient availability, and the microbial community structure.
So far, these interactions have never been evaluated in the Acacia and Eucalyptus forest planted on infertile soils in the Congolese coastal plains. Soil respiration was investigated in three loamy Orthic Luvisols (two arable, one forest soil), three sandy Haplic Podzols (also two arable, one forest soil) with a modified intersite method according to Lundegardh ().
The method allows characterization of the CO2-flux from the soil and interpretation of the different levels with regard to temperature, nutrient and air supply.
Forest floor litter production was measured seasonally (summer, winter and rainy) in 10 randomly placed 1 m 2 size quadrats adjacent to soil CO 2 efflux measurement in each OMA and OWA forest stands to evaluate impacts of forest floor litter on soil respiration.
Forest floor was separated in fresh leaves, partially decomposed leaves, twigs. Removal of dibenzofuran, dibenzo- p -dioxin, and 2-chlorodibenzo- p -dioxin (2-CDD) (10 ppm each) from soil microcosms to final concentrations in the parts-per-billion range was affected by the addition of Sphingomonas sp.
strain RW1. Rates and extents of removal were influenced by the density of RW1 organisms. For 2-CDD, the rate of removal was dependent on the content of soil organic matter. Effects of thinning on soil respiration and microbial respiration were examined over a 2-year period () in a coppice-originated European hornbeam (Carpinus betulus L.) stand in Istanbul.We measured soil CO, evolution rates with (S,) and without (S,) the forest floor litter and root respiration monthly in year-old loblolly pine (Pinus tueda L.) plantations during the fourth.2,3,7,8-Tetrachlorodibenzo-p-dioxin CAS No.
Known to be a human carcinogen First listed in the Second Annual Report on Carcinogens () Also known as dioxin, TCDD, or 2,3,7,8-TCDD O O Cl Cl Cl Cl Carcinogenicity 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is known to be a human carcinogen based on sufficient evidence of.