Nitrogen Deposition Effects on Temperate Forest Lichens and Trees
Nitrogen is emitted from agricultural activities and fossil fuel combustion to the atmosphere, where it is a major source of air pollution that impacts both ecosystems and humans. While increased nitrogen deposition in forests can stimulate growth of some species, nitrogen availability in excess of biological needs has also been associated with reduced productivity and increased mortality. To better understand deleterious nitrogen deposition effects on lichens and trees in temperate forests, researchers reviewed the underlying mechanisms at cellular, individual, and ecosystem levels. Authors identified knowledge gaps regarding nitrogen deposition and mechanisms of impact to lichens and trees, and point out the effects of nitrogen deposition separated for lichen, leaf and aboveground tissues, and belowground tissues and processes. These insights can aid in developing predictions of how organisms respond to either increases or decreases in nitrogen deposition.
Carter, T., Clark, C., Fenn, M.E., Jovan, S., Perakis, S.S., Riddell, J., Schaberg, P.G., Hastings, M., 2017, Mechanisms of nitrogen deposition effects on temperate forest lichens and trees: Ecosphere, v. 8, no. 3, p. e01717, http://dx.doi.org/10.1002/ecs2.1717. [Details]