Atmospheric particulate matter (PM) is a heterogeneous material. Though regulated as un-
speciated mass, it exerts most effects on vegetation and ecosystems by virtue of the mass …

Dry deposition can account for a large portion of the removal of trace chemicals from the
troposphere. Resistance schemes used in modeling often perform quite well in daytime …

Atmospheric nitrogen (N) deposition is a recognized threat to plant diversity in temperate
and northern parts of Europe and North America. This paper assesses evidence from field …

Spatial patterns and temporal trends of nitrogen (N) and phosphorus (P) deposition are
important for quantifying their impact on forest carbon (C) uptake. In a first step, we modeled …

Human activities have greatly altered the nitrogen (N) cycle, accelerating the rate of N
fixation in landscapes and delivery of N to water bodies. To examine relationships between …

Some 60% of coastal rivers and bays in the US have been moderately to severely degraded
by nutrient pollution. Both nitrogen (N) and phosphorus (P) contribute to the problem …

Rates of key soil processes involved in recycling of nutrients in forests are governed by
temperature and moisture conditions and by the chemical and physical nature of the litter …

Plants in urban ecosystems are exposed to many pollutants and higher temperatures, CO2
and nitrogen deposition than plants in rural areas,,,,. Although each factor has a detrimental …

Environmental problems in coastal ecosystems can sometimes be attributed to excess
nutrients flowing from upstream watersheds into estuarine settings. This nutrient over …

Humans have altered the global and regional cycles of nitrogen more than any other
element. Alteration of N cycling patterns and processes in forests is one potentially negative …