G. M. Berntson

TL;DR: In the US, nitrogen deposition remains relatively constant in the northeastern United States and is increasing in the Southeast and the West (Fenn et al. as mentioned in this paper, 2003), while acid acid deposition is increasing.

TL;DR: This paper reported responses of two different forest ecosystems to 9 years (1988-96) of chronic nitrogen (N) additions at the Harvard Forest, Petersham, Massachusetts, in six equal monthly doses.

TL;DR: In this article, the authors investigated how chronic nitrogen addition affects needle morphology, nitrogen metabolism (or partitioning) photosynthetic capacity and foliage productivity and found that the increase in leaf N is not accompanied by a greater capacity for carbon assimilation in the high N treatment.

TL;DR: The kinetics of NO3− immobilization in two temperate forest soils exposed to a range of experimental N deposition demonstrate that immobilization of N, which exhibits rapid kinetics, may play an important part in regulating the N retention capacity of forests in response to N deposition and suggest that current models which include only the slower phase of N immobilization may be inaccurate representations of N ignition processes in soils.

TL;DR: Differences between the biochemical and stomatal response to elevated carbon dioxide and nitrogen indicate that within mixed stands, individual plant responses do not fully characterize community response.