Dissolved nitrous oxide and emission relating to denitrification across the Poyang Lake aquatic continuum

Copyright © 2016. Published by Elsevier B.V..

Most aquatic ecosystems contribute elevated N2O to atmosphere due to increasing anthropogenic nitrogen loading. To further understand the spatial heterogeneity along an aquatic continuum from the upriver to wetland to lake to downriver, the study was conducted on spatial variations in N2O emission along Poyang Lake aquatic continuum during the flood season from 15 July 2013 to 10 August 2013. The results showed the N2O concentrations, the ratio of N2O/dinitrogen (N2) gases production, N2O emission and denitrification rates ranged from 0.10 to 1.11μgN/L, -0.007% to 0.051%, -9.73 to 127μgN/m2/hr and 1.33×104 to 31.9×104μgN2/m2/hr, respectively, across the continuum. The average N2O concentrations, the ratio of N2O/N2 and N2O emission was significantly lower in wetlands as compared to the rivers and lake (p<0.01). The significantly high denitrification rate and low N2O emission together highlighted that most N2O can be converted into N2 via near complete denitrification in the Poyang Lake wetlands. Our study suggests that the wetlands might impact N2O budget in an integrated aquatic ecosystems. Moreover, N2O emission from different aquatic ecosystem should be considered separately when quantifying the regional budget in aquatic ecosystem.

Medienart:

E-Artikel

Erscheinungsjahr:

2017

Erschienen:

2017

Enthalten in:

Zur Gesamtaufnahme - volume:52

Enthalten in:

Journal of environmental sciences (China) - 52(2017) vom: 01. Feb., Seite 130-140

Sprache:

Englisch

Beteiligte Personen:

Wang, Huaxin [VerfasserIn]
Zhang, Lu [VerfasserIn]
Yao, Xiaolong [VerfasserIn]
Xue, Bin [VerfasserIn]
Yan, Weijin [VerfasserIn]

Links:

Volltext

Themen:

Air Pollutants
Denitrification
Dinitrogen gas
Journal Article
K50XQU1029
Natural wetlands
Nitrogen
Nitrous Oxide
Nitrous oxide gas
Poyang Lake

Anmerkungen:

Date Completed 24.03.2017

Date Revised 24.03.2017

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.jes.2016.03.021

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM269455418