|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)|
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
The impact of trees on soil organic carbon dynamics in the Subarctic - Priming effects and microbial N mining
Investigating communal pathogen defense and its role in social evolution
- folgt -
- folgt -
Why Science Communication?
Stoichiometric controls of C and N cycling
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
Picky carnivorous plants?