deposition fluxes for the array of dry-deposited gaseous and particulate forms of N, in addition to wet deposition Conventional throughfall collection methods are labor intensive and fog or cloudwater deposition of N. Determining the and analytically expensive to implement at broad scales. This study was conducted to test an alternative approach requiring infrequent sample deposition of these m...

Management activities alter the structure of many tropical forest stands which can be expected to influence the magnitude of canopy water fluxes. The objectives of this study were to determine throughfall, stemflow and rainfall interception in differently managed forest stands, and to relate the observed pattern of rainfall partitioning to stand structural characteristics. The study was conduct...

Atmospheric mercury deposition by wet and dry processes contributes mercury to terrestrial and aquatic systems. Factors influencing the amount of mercury deposited to boreal forests were identified in this study. Throughfall and open canopy precipitation samples were collected in 2005 and 2006 using passive precipitation collectors from pristine sites located across the Superior National Forest...

High air concentrations of ammonium were detected at low and high altitude sites in Sweden, Finland and Norway during the spring 2006, coinciding with polluted air from biomass burning in eastern Europe passing over central and northern Fennoscandia. Unusually high values for throughfall deposition of ammonium were detected at one low altitude site and several high altitude sites in north Swede...

Topographic and meteorological conditions make the Columbia River Gorge (CRG) an 'exhaust pipe' for air pollutants generated by the Portland-Vancouver metropolis and Columbia Basin. We sampled fog, bulk precipitation, throughfall, airborne particulates, lichen thalli, and nitrophytic lichen distribution. Throughfall N and S deposition were high, 11.5-25.4 and 3.4-6.7 kg ha(-1) over 4.5 months a...

Estimation of the canopy influence on atmospheric inputs iodine (I), selenium (Se) and caesium (Cs) in terrestrial ecosystems is an essential condition for appropriate biogeochemical models. However, processes involved rain composition modifications after its passage through forest have been barely studied these elements. We monitored I, Se Cs concentrations both rainfall throughfall fourteen F...

forest canopy rainfall interception loss (i), canopy water storage (s), and the ratio of mean evaporation to mean rainfall intensity () are important components of the water balance in arid and semi-arid climate zones. the goal of this project was to quantify i and s and to evaluate the gash interception model for rainfall interception in a mature semi-arid pinus eldarica medw afforestation pla...

Honeydew production by New Zealand beech scale insects (Ultracoelostoma spp., Hemiptera: Margarodidae) is widely considered to have a positive influence on native animal abundance and ecosystem functioning. As a first assessment of whether there is a positive relationship between honeydew throughfall and litter decomposition rates, we placed experimental litter bags in each of 10 high and 10 lo...

The legacy of long-term mining activities in Wanshan mercury (Hg) mining area (WMMA), Guizhou, China including a series of environmental issues related to Hg pollution. The spatial distribution of gaseous elemental mercury (Hg0) concentrations in ambient air were monitored using a mobile RA-915 Zeeman Mercury Analyzer during daytime and night time in May 2010. The data imply that calcines and m...

The aim of this study is to assess the canopy rainfall interception, surface detention storage, and soil moisture fluctuation in a micro-catchment coffee plantation. Field measurements were carried out using 15 funnel-type ordinary rain gauges an experimental area 30 m × measure passing through upper lower estimate interception throughfall. Rain placed at different locations account for variabi...