Nitrogen Addition Affects Ecosystem Carbon Exchange by Regulating Plant Community Assembly and Altering Soil Properties in an Alpine Meadow on the Qinghai-Tibetan Plateau.

ABSTRACT: Nitrogen (N) deposition can affect the global ecosystem carbon balance. However, how plant community assembly regulates the ecosystem carbon exchange in response to the N deposition remains largely unclear, especially in alpine meadows. In this study, we conducted a manipulative experiment to examine the impacts of N (ammonium nitrate) addition on ecosystem carbon dioxide (CO₂) exchange by changing the plant community assembly and soil properties at an alpine meadow site on the Qinghai-Tibetan Plateau from 2014 to 2018. The N-addition treatments were N0, N7, N20, and N40 (0, 7, 20, and 40 kg N ha^-1year^-1) during the plant growing season. The net ecosystem CO₂ exchange (NEE), gross ecosystem productivity (GEP), and ecosystem respiration (ER) were

SUBMITTER: Han L 

PROVIDER: S-EPMC9234307 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature