Edith B. Allen

TL;DR: In the western United States vast acreages of land are exposed to low levels of atmospheric nitrogen (N) deposition, with interspersed hotspots of elevated N deposition downwind of large, expanding metropolitan centers or large agricultural operations.

TL;DR: In this article, the authors review direct and indirect environmental impacts of utility-scale solar energy (USSE) development, including impacts on biodiversity, land-use and land-cover change, soils, water resources, and human health.

TL;DR: It is demonstrated that N enrichment impacts mycorrhizal allocation across a wide range of grassland ecosystems, and relative allocation to arbuscules, coils, and extraradical hyphae was generally reduced by N enrichment.

TL;DR: In this article, the authors evaluated arbuscular mycorrhizal (AM) species diversity and abundance in nine locations along an anthropogenic nitrogen deposition gradient in coastal sage scrub (CSS) vegetation in southern California.

TL;DR: In this article, the authors synthesize current research relating atmospheric N deposition to effects on terrestrial and freshwater ecosystems in the United States, and to estimate associated empirical N critical loads, defined as the input of a pollutant below which no detrimental ecological effects occur over the long-term according to present knowledge.