Nitrogen cycling and dynamic analysis of man made larch forest ecosystem

1995 ◽  
Vol 168-169 (1) ◽  
pp. 391-397 ◽  
Author(s):  
Shirong Liu
Keyword(s):  
Dynamic Analysis ◽  
Nitrogen Cycling ◽  
Forest Ecosystem ◽  
Larch Forest

Changes in soil nitrogen cycling in a northern temperate forest ecosystem during succession

2014 ◽  
Vol 121 (3) ◽  
pp. 471-488 ◽  
Author(s):  
L. E. Nave ◽  
J. P. Sparks ◽  
J. Le Moine ◽  
B. S. Hardiman ◽  
K. J. Nadelhoffer ◽  
...  
Keyword(s):  
Nitrogen Cycling ◽  
Soil Nitrogen ◽  
Forest Ecosystem ◽  
Temperate Forest ◽  
Soil Nitrogen Cycling ◽  
Temperate Forest Ecosystem

scholarly journals Modeling of Nitrogen Dynamics in an Austrian Alpine Forest Ecosystem on Calcareous Soils: A Scenario-Based Risk Assessment under Changing Environmental Conditions

2007 ◽  
Vol 7 ◽  
pp. 159-165 ◽  
Author(s):  
Friedl Herman ◽  
Stefan Smidt ◽  
Klaus Butterbach-Bahl ◽  
Michael Englisch ◽  
Ernst Gebetsroither ◽  
...  
Keyword(s):  
Nitrogen Cycling ◽  
Nitrate Leaching ◽  
Forest Ecosystem ◽  
Calcareous Soils ◽  
Forest Productivity ◽  
Balance Model ◽  
Emission Rates ◽  
Nitrogen Input ◽  
Alpine Forest ◽  
The Individual

We modeled the behavior of an Austrian alpine forest ecosystem on calcareous soils under changing climate and atmospheric nitrogen deposition scenarios. The change of nitrate leaching, emission rates of nitrogen compounds, and forest productivity were calculated using four process-oriented models for the periods 1998–2002 and 2048–2052. Each model reflects with high detail a segment of the ecosystem: PnET-N-DNDC (photosynthesis-evapotranspiration-nitrification-denitrification-decomposition; shortterm nitrogen cycling), BROOK90 (water balance for small and homogenous forest watersheds), HYDRUS (water flux in complex and heterogenous soils), and PICUS v1.3 (forest productivity). The nitrogen balance model (NBM) combines the individual results into a comprehensive picture and extends the specific values beyond the limits of the individual models. The evaluation of the findings was outlined with TRACE, a model enabling a long-term prognosis of nitrogen cycling in annual time steps.Temperature increase and nitrogen input are influenced by various components and processes of the forest ecosystem. An increase of the temperature of 2.5°C led to an enhancement of the N2O emission rates and affected the mineralization and the nitrification rates with the consequence of increased nitrate leaching into the subsoil. Enhanced nitrogen input also showed notable effects on nitrate leaching.

Calcium constrains plant control over forest ecosystem nitrogen cycling

Ecology ◽  
2011 ◽  
Vol 92 (11) ◽  
pp. 2035-2042 ◽  
Author(s):  
Peter M. Groffman ◽  
Melany C. Fisk
Keyword(s):  
Nitrogen Cycling ◽  
Forest Ecosystem ◽  
Plant Control

scholarly journals Ozone Fluxes to a Larch Forest Ecosystem at the Timberline in the Italian Alps

10.5772/56282 ◽  
2013 ◽  
Author(s):  
Giacomo Gerosa ◽  
Angelo Finco ◽  
Antonio Negri ◽  
Riccardo Marzuoli ◽  
Gerhard Wieser
Keyword(s):  
Forest Ecosystem ◽  
Larch Forest ◽  
Italian Alps ◽  
Ozone Fluxes

scholarly journals Carbon and Nitrogen Stocks in Three Types of Larix gmelinii Forests in Daxing’an Mountains, Northeast China

Forests ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 305 ◽  
Author(s):  
Ruihan Xiao ◽  
Xiuling Man ◽  
Beixing Duan
Keyword(s):  
Soil Carbon ◽  
Forest Ecosystem ◽  
Forest Ecosystems ◽  
Larch Forest ◽  
Larix Gmelinii ◽  
Carbon And Nitrogen ◽  
Ledum Palustre ◽  
Nitrogen Stock ◽  
Daxing’An Mountains ◽  
Carbon And Nitrogen Stocks

Studying carbon and nitrogen stocks in different types of larch forest ecosystems is of great significance for assessing the carbon sink capacity and nitrogen level in larch forests. To evaluate the effects of the differences of forest type on the carbon and nitrogen stock capacity of the larch forest ecosystem, we selected three typical types of larch forest ecosystems in the northern part of Daxing’an Mountains, which were the Rhododendron simsii-Larix gmelinii forest (RL), Ledum palustre-Larix gmelinii forest (LL) and Sphagnum-Bryum-Ledum palustre-Larix gmelinii forest (SLL), to determine the carbon and nitrogen stocks in the vegetation (trees and understories), litter and soil. Results showed that there were significant differences in carbon and nitrogen stocks among the three types of larch forest ecosystems, showing a sequence of SLL (288.01 Mg·ha−1 and 25.19 Mg·ha−1) > LL (176.52 Mg·ha−1 and 14.85 Mg·ha−1) > RL (153.93 Mg·ha−1 and 10.00 Mg·ha−1) (P < 0.05). The largest proportions of carbon and nitrogen stocks were found in soils, accounting for 83.20%, 72.89% and 64.61% of carbon stocks and 98.61%, 97.58% and 96.00% of nitrogen stocks in the SLL, LL and RL, respectively. Also, it was found that significant differences among the three types of larch forest ecosystems in terms of soil carbon and nitrogen stocks (SLL > LL > RL) (P < 0.05) were the primary reasons for the differences in the ecosystem carbon and nitrogen stocks. More than 79% of soil carbon and 51% of soil nitrogen at a depth of 0–100 cm were stored in the upper 50 cm of the soil pool. In the vegetation layer, due to the similar tree biomass carbon and nitrogen stocks, there were no significant differences in carbon and nitrogen stocks among the three types of larch forest ecosystems. The litter carbon stock in the SLL was significantly higher than that in the LL and RL (P < 0.05), but no significant differences in nitrogen stock were found among them (P > 0.05). These findings suggest that different forest types with the same tree layer and different understory vegetation can greatly affect the carbon and nitrogen stock capacity of the forest ecosystem. This indicates that understory vegetation may have significant effects on the carbon and nitrogen stocks in soil and litter, which highlights the need to consider the effects of understory in future research into the carbon and nitrogen stock capacity of forest ecosystems.

Carbon fluxes and their response to environmental variables in a Dahurian larch forest ecosystem in northeast China

2008 ◽  
Vol 19 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Hui-min Wang ◽  
Nobuko Saigusa ◽  
Yuan-gang Zu ◽  
Wen-jie Wang ◽  
Susumu Yamamoto ◽  
...  
Keyword(s):  
Forest Ecosystem ◽  
Environmental Variables ◽  
Northeast China ◽  
Carbon Fluxes ◽  
Larch Forest ◽  
Dahurian Larch
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