One of the important consequences of the climatic changes is the potential danger of increasing the concentrations of some pollutants, which may cause damages to humans, animals and plants. Therefore, it is worthwhile to study carefully the impact of future climate changes on the high pollution levels. The major topic of the discussion in this paper is the increase of some ozone levels in Bulga...

BACKGROUND Many theoretical researches predicted that the larch species would decrease drastically in China under future climatic changes. However, responses of the structural and compositional changes of Gmelin larch (Larix gmelinii var. gmelinii) forests to climatic changes have rarely been reported. METHODOLOGY/PRINCIPAL FINDINGS Field survey was conducted to examine the structures and com...

Recent efforts to project vegetation responses to climatic warming have emphasized the tight linkages between climate and vegetation distribution. Here we provide several examples indicating that the direct effects of climatic warming on boreal vegetation can be qualitatively different than the indirect effects mediated by climatic responses of herbivores. These herbivore-mediated vegetation re...

Nutrition and physical performance 113 I have to repeat again, and apologize for, my inability to give much indication of the effect of ageing on total daily energy expenditure. We have, however, seldom found much obvious difference between the mean values for comparable populations ; the mean energy output of sedentary men aged about 60 we have measured as about 2600 kcal/day, which is similar...

Faunal elements are groups of species with similar contemporary distributional patterns and may represent an historical association. It is hypothesized that members of a faunal element will respond similarly to environmental conditions. Since the mid-1960s the central plains has experienced cool, mesic (cryomesic) conditions. The distributional limits of members of the Boreal faunal element in ...

The complex phenomenon of decline in European oak is currently triggered by changing climatic conditions and their consequences like heavy rains, local floods and pest development. Especially, pathogens from Phytophthora genus profit from soil saturation with water. They are alien invasive species, which attack and severely damage fine roots. In drought conditions occurring in the subsequent ye...

Small rural coastal communities located in Atlantic Canada are vulnerable to the effects of climate and environmental changes. Major storms have impounded the coastline, causing much physical damage and affecting the socioeconomics of these communities that are composed of an aging population. The current study relays findings based on interviews completed in 2011–2012, following the 2010 winte...

Nitrous oxide (N2O) is an important greenhouse gas that is presently increasing at a rate of 0.25 percent per year. Records measured along two ice cores from Summit in Central Greenland provide information about variations in atmospheric N2O concentration in the past. The record covering the past millennium reduces the uncertainty regarding the preindustrial concentration. Records covering the ...

Both the prevalence and severity of respiratory allergic diseases such as bronchial asthma have increased in recent years. Among the factors implicated in this "epidemic" are indoor and outdoor airborne pollutants. Urbanisation with its high levels of vehicle emissions and Westernised lifestyle parallels the increase in respiratory allergy in most industrialised countries, and people who live i...

28 We use the GEOS-Chem chemical transport model combined with the GISS general 29 circulation model to calculate the aerosol direct and indirect (warm cloud) radiative 30 forcings from US anthropogenic sources over the 1950-2050 period, based on historical 31 emission inventories and future projections from the IPCC A1B scenario. The aerosol 32 simulation is evaluated with observed spatial dis...