Changes in the nitrogen budget of forest ecosystems under sustained reduction of inputs — analysis of state and prognoses based on a case study in a Norway spruce forest at Solling, Germany

2001 ◽  
pp. 910-911
Author(s):  
N. P. Lamersdorf ◽  
M. Bredemeier ◽  
F. Beese
Keyword(s):  
Norway Spruce ◽  
Forest Ecosystems ◽  
Nitrogen Budget ◽  
Spruce Forest ◽  
Sustained Reduction ◽  
Norway Spruce Forest

scholarly journals Relation of Chlorophyll Fluorescence Sensitive Reflectance Ratios to Carbon Flux Measurements of Montanne Grassland and Norway Spruce Forest Ecosystems in the Temperate Zone

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
Alexander Ač ◽  
Zbyněk Malenovský ◽  
Otmar Urban ◽  
Jan Hanuš ◽  
Martina Zitová ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Norway Spruce ◽  
Forest Ecosystems ◽  
Gross Primary Production ◽  
Imaging Spectroscopy ◽  
Fluorescence Emission ◽  
Net Ecosystem Exchange ◽  
Spruce Forest ◽  
Temporal Dimension ◽  
Norway Spruce Forest

We explored ability of reflectance vegetation indexes (VIs) related to chlorophyll fluorescence emission (, ) and de-epoxidation state of xanthophyll cycle pigments (PRI, calculated as ) to track changes in the CO2assimilation rate and Light Use Efficiency (LUE) in montane grassland and Norway spruce forest ecosystems, both at leaf and also canopy level. VIs were measured at two research plots using a ground-based high spatial/spectral resolution imaging spectroscopy technique. No significant relationship between VIs and leaf light-saturated CO2assimilation () was detected in instantaneous measurements of grassland under steady-state irradiance conditions. Once the temporal dimension and daily irradiance variation were included into the experimental setup, statistically significant changes in VIs related to tested physiological parameters were revealed. ΔPRI and Δ() of grassland plant leaves under dark-to-full sunlight transition in the scale of minutes were significantly related to (). In the daily course, the variation of VIs measured in one-hour intervals correlated well with the variation of Gross Primary Production (GPP), Net Ecosystem Exchange (NEE), and LUE estimated via the eddy-covariance flux tower. Statistical results were weaker in the case of the grassland ecosystem, with the strongest statistical relation of the index with NEE and GPP.

scholarly journals Assessing the Contrasting Effects of the Exceptional 2015 Drought on the Carbon Dynamics in Two Norway Spruce Forest Ecosystems

Atmosphere ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 988
Author(s):  
Caleb Mensah ◽  
Ladislav Šigut ◽  
Milan Fischer ◽  
Lenka Foltýnová ◽  
Georg Jocher ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Large Scale ◽  
Forest Ecosystems ◽  
Heat Waves ◽  
Ecosystem Respiration ◽  
Vapour Pressure Deficit ◽  
Climate Projections ◽  
Summer Drought ◽  
Spruce Forest ◽  
Norway Spruce Forest

The occurrence of extreme drought poses a severe threat to forest ecosystems and reduces their capability to sequester carbon dioxide. This study analysed the impacts of a central European summer drought in 2015 on gross primary productivity (GPP) at two Norway spruce forest sites representing two contrasting climatic conditions—cold and humid climate at Bílý Kr̆íz̆ (CZ-BK1) vs. moderately warm and dry climate at Rájec (CZ-RAJ). The comparative analyses of GPP was based on a three-year eddy covariance dataset, where 2014 and 2016 represented years with normal conditions, while 2015 was characterized by dry conditions. A significant decline in the forest GPP was found during the dry year of 2015, reaching 14% and 6% at CZ-BK1 and CZ-RAJ, respectively. The reduction in GPP coincided with high ecosystem respiration (Reco) during the dry year period, especially during July and August, when several heat waves hit the region. Additional analyses of GPP decline during the dry year period suggested that a vapour pressure deficit played a more important role than the soil volumetric water content at both investigated sites, highlighting the often neglected importance of considering the species hydraulic strategy (isohydric vs. anisohydric) in drought impact assessments. The study indicates the high vulnerability of the Norway spruce forest to drought stress, especially at sites with precipitation equal or smaller than the atmospheric evaporative demand. Since central Europe is currently experiencing large-scale dieback of Norway spruce forests in lowlands and uplands (such as for CZ-RAJ conditions), the findings of this study may help to quantitatively assess the fate of these widespread cultures under future climate projections, and may help to delimitate the areas of their sustainable production.

scholarly journals Water availability effect on transpiration of the Norway spruce forest stand: a case study

Beskydy ◽  
2013 ◽  
Vol 6 (1) ◽  
pp. 67-74
Author(s):  
R. Bužková ◽  
R. Pokorný
Keyword(s):  
Soil Water ◽  
Norway Spruce ◽  
Water Availability ◽  
Forest Stand ◽  
Spruce Forest ◽  
Production Potential ◽  
Stand Transpiration ◽  
Dry Conditions ◽  
Norway Spruce Forest

We have studied Norway spruce stand transpiration in socially differentitated forest in dense and sparse part. During dry conditions, codominant trees in forest sparse part transpired about 85 % of total stand transpiration and in forest dense 92 %. Forests socially differentitated and less dense has a better biomass production potential with exception of extremely low soil water availability.

The contribution of hydroxylamine content to spatial variability of N2O formation in soil of a Norway spruce forest

2016 ◽  
Vol 178 ◽  
pp. 76-86 ◽  
Author(s):  
Shurong Liu ◽  
Michael Herbst ◽  
Roland Bol ◽  
Nina Gottselig ◽  
Thomas Pütz ◽  
...  
Keyword(s):  
Spatial Variability ◽  
Norway Spruce ◽  
Spruce Forest ◽  
N2o Formation ◽  
Norway Spruce Forest

scholarly journals Former agriculture impacts on properties of Norway spruce forest

2011 ◽  
Vol 20 (3) ◽  
pp. 437 ◽  
Author(s):  
D. Kacalek ◽  
D. Dusek ◽  
J. Novak ◽  
M. Slodicak ◽  
J. Bartos ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Spruce Forest ◽  
Norway Spruce Forest

Uptake of 87Sr from microcline and biotite by ectomycorrhizal fungi in a Norway spruce forest

2006 ◽  
Vol 38 (8) ◽  
pp. 2487-2490 ◽  
Author(s):  
Håkan Wallander ◽  
David Hagerberg ◽  
Göran Åberg
Keyword(s):  
Norway Spruce ◽  
Ectomycorrhizal Fungi ◽  
Spruce Forest ◽  
Norway Spruce Forest

Seasonal and inter-annual variability of soil CO2 efflux in a Norway spruce forest over an eight-year study

2018 ◽  
Vol 256-257 ◽  
pp. 93-103 ◽  
Author(s):  
Manuel Acosta ◽  
Eva Darenova ◽  
Lenka Krupková ◽  
Marian Pavelka
Keyword(s):  
Norway Spruce ◽  
Soil Co2 Efflux ◽  
Co2 Efflux ◽  
Spruce Forest ◽  
Soil Co2 ◽  
Annual Variability ◽  
Norway Spruce Forest
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