John H. Angell
University of Massachusetts Boston
7 Papers
83 Citations
John H. Angell is an academic researcher from University of Massachusetts Boston. The author has contributed to research in topics: Salt marsh & Denitrification. The author has an hindex of 5, co-authored 7 publications.
Chat about Author
Papers
Nutrient enrichment induces dormancy and decreases diversity of active bacteria in salt marsh sediments.
Patrick J. Kearns,John H. Angell,Evan M. Howard,Linda A. Deegan,Rachel H. R. Stanley,Jennifer L. Bowen,Jennifer L. Bowen +6 more
TL;DR: The results suggest that perturbations to salt marshes can drastically alter active microbial communities, however these communities may remain resilient by protecting total diversity through increased dormancy.
Long‐term fertilization alters the relative importance of nitrate reduction pathways in salt marsh sediments
Xuefeng Peng,Xuefeng Peng,Qixing Ji,John H. Angell,Patrick J. Kearns,Patrick J. Kearns,Hannah J. Yang,Jennifer L. Bowen,Jennifer L. Bowen,Bess B. Ward +9 more
TL;DR: In this article, the authors examined the effect of nutrient enrichment on salt marsh sediments and determined rates of nitrification, denitrification, and dissimilatory nitrate reduction to ammonium (DNRA) using sediment slurry incubations with 15 N labeled ammonium or nitrate tracers under oxic headspace.
38
Long-term nutrient addition differentially alters community composition and diversity of genes that control nitrous oxide flux from salt marsh sediments
TL;DR: The results suggest that both norB and nosZ containing microbes are affected by fertilization and that the Great Sippewissett Marsh may harbor distinct clades of novel denitrifying microorganisms that are responsible for both the production and removal of N 2 O.
37
Community Composition of Nitrous Oxide-Related Genes in Salt Marsh Sediments Exposed to Nitrogen Enrichment
John H. Angell,Xuefeng Peng,Qixing Ji,Ian Craick,Amal Jayakumar,Patrick J. Kearns,Bess B. Ward,Jennifer L. Bowen +7 more
TL;DR: In this paper, a profile of microbial communities and communities of micro-organisms containing specific nitrogen cycling genes that encode several enzymes (amoA, norB, nosZ) related to nitrous oxide flux from salt marsh sediments was generated.
Long-Term Fertilization Alters Nitrous Oxide Cycling Dynamics in Salt Marsh Sediments.
TL;DR: In this paper, the impact of long-term fertilization on nitrogen cycling processes with a focus on N2O dynamics in a New England salt marsh was examined, and it was found that both nitrification and denitrification contribute to net nitrogen oxide production in fertilized sediments.
12