Primary Convener:
Lin Zhang, Texas A&M University Corpus Christi

Convener:
Wei Qin, University of Illinois at Urbana-Champaign
Xin Sun, University of Pennsylvania
Weiyi Tang, University of South Florida St. Petersburg

Early Career Convener:
Charlotte Lee, Woods Hole Oceanographic Institution

Chair:
Lin Zhang, Texas A&M University Corpus Christi
Wei Qin, University of Illinois at Urbana-Champaign
Xin Sun, Princeton University
Charlotte Lee, Woods Hole Oceanographic Institution

Nitrogen (N) cycling in aquatic ecosystems—both marine and freshwater—is fundamental to ecosystem productivity, biogeochemical fluxes, and food web structure. At the base of these systems, primary producers assimilate inorganic N through both autotrophic and mixotrophic pathways, converting it organic N, predominantly in the form of proteins and amino acids (AAs), which serve as the primary carriers of N as it moves through the food webs. Chemoautotrophic microorganisms also contribute significantly by driving redox transformations of N, connecting the N cycle to carbon, oxygen, and greenhouse gas dynamics.This session invites research that advances our understanding of the sources, transformations, and ecological consequences of N cycling in aquatic environments. We welcome studies using a range of tools—from stable isotope analysis to molecular biology and numerical modeling—to trace N pathways, reconstruct past biogeochemical conditions, or assess contemporary ecosystem responses to anthropogenic and climatic perturbations.

Index Terms
0454 Isotopic composition and chemistry
0469 Nitrogen cycling
1041 Stable isotope geochemistry
1050 Marine geochemistry

Cross-Listed:
PP - Paleoceanography and Paleoclimatology
OS - Ocean Sciences
EP - Earth and Planetary Surface Processes
GC - Global Environmental Change

Suggested Itineraries:
Biochemistry

Neighborhoods:
3. Earth Covering