Forest regions

Rowe, J. S. Forest Regions of Canada Can. For. Serv., Dept. Fisheries and the Environment Ottawa, Ont. Canada, 1972. 

Edible mushrooms are a significant element of the diet of the local population, and therefore represent a serious source of internal exposure to irradiation. Between 30% and 60% of the local population of Ukrainian Polissya regularly consume forest food products (Strand et al., 1996a), and a close correlation has been established between their consumption and i Cs load (Jacob and Likhtarev, 1996 Strand et al. 1996b). The contribution of forest food products to the internal exposure dose of the population in the forested region varies widely - from 12%-40% of the entire population to 50%-95% in some critical groups (Balonov et al., 1996 ... 

For the inhabitants of the exclusion zone, situated in a forested region without well-developed economic and social infrastructures, it is of interest to estimate the relative contributions to internal exposure of forest food (berries and mushrooms) and conventional agricultural food (potatoes and milk). Some specialist studies have assumed that forest food represents only a small part of the diet of inhabitants of the exclusion zone, but we would suggest that in fact, it plays a major role. Typically, the consumption of forest food contributes 50% of the internal exposure dose, while for some critical population groups, it can exceed 80%. The definition of the spatial variation in pollution, the prevailing ecological conditions, and the diet should allow a scientifically-based prediction to be made of the internal exposure dose to the local population, and will help to identify the major risk factors within a certain time period following the Chernobyl catastrophe. 

Field studies suggest that the nitrate radical reaction can also be a major contributor to isoprene decay at night, as well as contributing to the formation of organic nitrates in air. For example, Starn et al. (1998b) found that when the product of N02 and 03 (which form N03) was high in a forested region in the southeastern United States, isoprene often decayed rapidly at dusk. This reaction of N03 with isoprene was estimated to be the major sink for N03 under some conditions in this area. 

Soils found primarily in cool and humid forested regions, Spodosols have subsurface accumulations of amorphous materials, mainly iron and aluminum oxides. These soils are usually strongly leached, blit can be used for crop support with addition of lime and fertilizer,... 

Montagnini, F., A. Fanzeres, and S. G. da Vinha. 1S>94. Studies on restoration ecology in the Atlantic Forest region of Bahia, Brazil. Interciencia 19 323-330. 

For the purpose of this chapter, we will first examine how human activities affect these fluxes, estimating the relative importance of the various anthropogenic fluxes of equation (2) for Brazilian Amazonia the landscape unit for our estimates is therefore the entire original forested region (Table 8.2). Then, we will demonstrate how extractive reserves and extractivist activities are related to these broader anthropogenical-ly induced fluxes. 

Molion (1975) employed climatological data (average charts of wind and specific humidity seasonal values) and the method of Penman (1963) to estimate that about 52% of the rain falling on the region was lost through the river. Similarly Villa Nova et al. (1976) applied Penman s method adapted to forested regions by Shiau and Davar (1973) and calculated that evaporation represented 54%, and 46% of rainfall was lost to the river. 

Shiau S.V. and Davar K.S., Modified Penman method for potential evapotranspiration from forest regions. Journal of Hydrology , 18, 349-365 (1973). 

Stober I. and Bucher K. (1999) Deep groundwater in the crystalline basement of the Black Forest region. Appl. Geochem. 14, 237-254. 

The white-handed titi (C. torquatus) and the dusky titi (C. moloch) occupy the same forested region of the upper Amazon. The dusky titi lives along rivers and in wet forests, while the white-handed titi lives on higher ground. The white-handed titi likes heights so much that it sleeps on the branches of the tall emergent trees that stand above the high canopy of the rain forest, several hundred feet above the forest floor. 

There are two species of squirrel monkeys, the smallest of the New World monkeys. The common squirrel monkey Saimiri sciureus) lives throughout most of South America s rain forest region. The red-backed squirrel monkey (5. oerstedii) occurs only in Panama and Costa Rica in the middle levels of the forest, where they eat primarily fruit, though they also use their narrow, sharply pointed teeth to devour small insects. Some authorities regard the red-backed squirrel monkey as a subspecies of the common squirrel monkey. 

Beautiful color photo of a cluster of mature P. cyanescens taken in the Black Forest region of Germany s Southwest in Early November. 

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