Park, J-H; Matzner, E: Detrital control on the release of dissolved organic nitrogen (DON) and dissolved inorganic nitrogen (DIN) from the forest floor under chronic N deposition, Environmental Pollution, 143, 178-185 (2006) | |
Abstract: The role of detrital quantity and quality in forest floor N leaching was investigated in a litter manipulation experiment at a deciduous forest under chronic N deposition. Dissolved inorganic nitrogen (DIN) comprised the bulk of nitrogen leaching from the control except a short period following autumn litterfall. The dominance of DIN was strengthened by litter exclusion, whereas the addition of glucose or fresh litter led to a small increase in dissolved organic nitrogen (DON) and either a temporary or gradual reduction in NO3− release, respectively. Changes in soluble organic C and microbial C in the forest floor implied that increased availability of C sources might have enhanced microbial immobilization of DIN, either temporarily following glucose application or over the longer term following litter addition. The results suggest that detrital quantity and quality can play a crucial role in determining the balance between DIN and DON in N-enriched forest soils. Detrital quantity and quality play a crucial role in regulating the release of DON and DIN from the forest floor under chronic N deposition. Keywords: C limitation; Dissolved inorganic nitrogen; Dissolved organic nitrogen; Forest floor; N saturation |
Antrittsvorlesung: |
---|
Mi. 22.05.2024 Funktionelle Pilzökologie: Diversität und Prozesse auf unterschiedlichen Skalen |
BayCEER-Kolloquium: |
Do. 06.06.2024 Tracking plant diversity dynamics on islands over thousands of years |
Mo. 10.06.2024 Arsenic biogeochemistry from paddy soil to rice grain |
Do. 13.06.2024 Seeing the forest beneath the trees: Mycorrhizal fungi as trait integrators of ecosystem processes |
Ökologisch-Botanischer Garten: |
Mi. 29.05.2024 Führung | "Grüne Apotheke: Heilpflanzen" |