Biogeochemical consequences

What are the biogeochemical consequences of anthropogenic activities in the Amazon (that is, how do these activities alter the natural functioning of stream... 

The continued construction of hydroelectric dams and expansion of agricultural and urban areas adds urgency to increasing our ability to forecast biogeochemical consequences of such developments in the Amazon basin. Applications of limnological understanding to timber management in flooded forests, to fisheries, to conservation of aquatic biodiversity, to control of waterborne disease vectors and to amelioration of... 

Puhrman, J. A., and Capone, D. G. (1991). Possible biogeochemical consequences of ocean fertilization. Limnology and Oceanography 36, 1951—1959. 

Fu, F. X., Zhang, Y., Leblanc, K., Sanudo-Wilhelmy, S. A., and Hutchins, D. A. (2005a). The biological and biogeochemical consequences of phosphate scavenging onto phytoplankton cell surfaces. Limnol. Oceanogr. 50, 1459—1472. 

Cloud P. E. (1976) Beginnings of biospheric evolution and their biogeochemical consequences. Paleobiol. 2, 351-387. 

The identification of biogeochemical consequences of carbon, nitrogen, sulfnr, oxygen and other biophilic elements incorporation into biomass is recognized as an isotope fractionation or anomaly. When an element exists as a mixture of stable isotopes, as in the case of C, H, S, N, and 0, biochemical and chemical transformations... 

Sulfur and oxygen are in the same column of the periodic table. List their chemical similarities and differences and consider the biogeochemical consequences of each. 

Rontani J.-F., Bonin P. (2000) Aerobic bacterial metabolism of phytol in seawater effect of particulate association on an abiotic intermediate step and its biogeochemical consequences. Org. Geochem. 31, 489—96. 

Trees in Grasslands Biogeochemical Consequences of Woody Plant Expansion... 

It is often taken for granted that the oxygen content of the air is nearly constant at ca. 20% of the atmospheric volume, that most of the liquid water on the planet is aerobic (i.e. contains O2), and that most water has pH values relatively close to neutral" (close to 7). However, these circumstances are not mere coincidences but are in fact consequences of the interaction of key global biogeochemical cycles. For instance, the pH of rainwater is often determined by the relative amounts of ammonia and sulfuric acid cycled through the atmosphere, a clear example of interaction between the nitrogen and sulfur cycles. 

It is also often taken for granted that many of the Earth s subsystems are exposed to free oxygen (O2), leading to a range of one-way reactions of reduced materials (such as organic carbon or metal sulfides) to an oxidized form. As pointed out many times in earlier chapters, the oxidation-reduction status of the planet is the consequence of the dynamic interactions of biogeochemical cycles. As is the case with the acid-base balances, there is considerable sensitivity to perturbations of "redox" conditions, sometimes dramatically as in the case of bodies of water that suddenly become anaerobic because of eutrophication. Another extreme... 

System 18. aquatic plants and their biological reactions, endemic diseases (XII) aquatic animals, including bentos, plankton, bottom sediment invertebrates, fishes, amphibians, mammals, vertebrates, their biological reactions and endemic diseases (VIII). Bioconcentration is the most typical and important consequence of biogeochemical migration of many chemical species in aquatic ecosystems. 

As a consequence of intensive application of mineral fertilizers, nitrogen and phosphorus biogeochemical provinces have been formed in many regions, for instance, in Central and South East Asia, East Europe, etc. 

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