Ecosystems mineralization

The atmospheric deposition of lead was 190 g/ha/yr and this value was connected with declining of leaded petrol use in USA from 1975. The mineral soil and forest floor were the major pools of Pb in the ecosystem. Mineral soil pools (<2 mm size fraction) are generally the largest element pools for the HBEF, however this includes relatively unreactive soil minerals. Deposition and accumulation of Pb in the forest floor have been the focus of a number of investigations. It has been shown that at... 

Trinchera, A., F. Pinzari and A. Benedetti (2001), Should we be able to define soil quality before restoring it Use of soil quality indicators in Mediterranean ecosystems . Mineral Biotechnology, Vol. 13, pp. 13-18. 

Consider a lake with a smaU watershed in a forest ecosystem. The forest and vegetation can be considered as an acid concentrator. SO2, NO2, and acid aerosol are deposited on vegetation surfaces during dry periods and rainfalls they are washed to the soil floor by low-pH rainwater. Much of the acidity is neutralized by dissolving and mobilizing minerals in the soil. Aluminum, calcium, magnesium, sodium, and potassium are leached from the soil into surface waters. The ability of soils to tolerate acidic deposition is very dependent on the alkalinity of the soil. The soil structure in the... 

The changes in spatial distribution of mineral resources and the morphological and physiological characteristics of the dominant plants have an effect on key ecosystem processes by affecting the timing of growth and... 

DeBano, LF. Assessing the effects of management actions on soils and mineral cycling in mediterranean ecosystems. In Conrad, C.E. Oechel, W.C., Tech. Coordinators. Proc. of the Symposium on Dynamics and Management of Mediterranean-Type Ecosystems, June 22-26, 1981, San Diego CA. Gen. Tech. Rep. PSW-58, USDA For. Serv. Pac. SW For. and Range Exp. Sta. Berkeley, CA, 1982. pp 345-350. 

An appropriate mineral medium supplemented with the organic compound that is to be studied is inoculated with a sample of water, soil, or sediment. In studies of the environmental fate of a xenobiotic in a specific ecosystem, samples are generally taken from the area putatively contaminated with the given compound so that a degree of environmental relevance is automatically incorporated. Attention has, in addition been directed to pristine environments, and the issues of adaptation or preexposure have already been discussed. 

Mineralization and immobilization in the rhizosphere are processes that are probably suitable to enable us to estimate ecosystem performance—e.g., productivity, stability, resilience. To properly answer this question, we should understand how differences in plant species may affect below-ground subsystems and what is the functional significance of diversity of. soil organisms. 

Frissel, M. J., Ed. "Cycling of mineral nutrients in agricultural ecosystem". Elsevier Scientific Publ. Co New York, 1978. 

If we are to describe evolution of the geological/biological ecosystem then we must have a way of estimating the time of appearance of various physical and chemical objects, including organisms. The best method we have of dating depends on studies of minerals. The so-called geological periods (Table 1.8), have to be obtained... 

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