The phenology of gross ecosystem production in a macroalga and seagrass canopy is driven by seasonal temperature

2020 ◽  
Vol 68 (4) ◽  
pp. 298-312
Author(s):  
Kenjiro Hinode ◽  
Peeraporn Punchai ◽  
Mako Saitsu ◽  
Gregory N. Nishihara ◽  
Yukio Inoue ◽  
...  
Keyword(s):  
Seasonal Temperature ◽  
Gross Ecosystem Production ◽  
Ecosystem Production

Comparisons between PnET-Day and eddy covariance based gross ecosystem production in two Northern Wisconsin forests

2008 ◽  
Vol 148 (2) ◽  
pp. 247-256 ◽  
Author(s):  
Soung-Ryoul Ryu ◽  
Jiquan Chen ◽  
Asko Noormets ◽  
Mary K. Bresee ◽  
Scott V. Ollinger
Keyword(s):  
Eddy Covariance ◽  
Gross Ecosystem Production ◽  
Ecosystem Production

scholarly journals Scaling gross ecosystem production at Harvard Forest with remote sensing: a comparison of estimates from a constrained quantum-use efficiency model and eddy correlation

1995 ◽  
Vol 18 (10) ◽  
pp. 1201-1213 ◽  
Author(s):  
R.H. WARING ◽  
B.E. LAW ◽  
M.L. GOULDEN ◽  
S.L. BASSOW ◽  
R.W. McCREIGHT ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Eddy Correlation ◽  
Gross Ecosystem Production ◽  
Harvard Forest ◽  
Ecosystem Production ◽  
Use Efficiency

scholarly journals Monitoring of carbon dioxide fluxes in a subalpine grassland ecosystem of the Italian Alps using a multispectral sensor

2014 ◽  
Vol 11 (3) ◽  
pp. 4729-4769 ◽  
Author(s):  
K. Sakowska ◽  
L. Vescovo ◽  
B. Marcolla ◽  
R. Juszczak ◽  
J. Olejnik ◽  
...  
Keyword(s):  
Vegetation Indices ◽  
Climatic Conditions ◽  
Grassland Ecosystem ◽  
Italian Alps ◽  
Carbon Dioxide Fluxes ◽  
Gross Ecosystem Production ◽  
Ecosystem Production ◽  
Edge Part ◽  
Spectral Vegetation Indices ◽  
Reflectance Measurements

Abstract. The study investigates the potential of a multispectral sensor for monitoring mean midday gross ecosystem production (GEPm) in a dynamic subalpine grassland ecosystem of the Italian Alps equipped with an eddy covariance flux tower. Reflectance observations were collected for five consecutive years by means of a multispectral radiometer system. Spectral vegetation indices were calculated from reflectance measurements at particular wavelengths. Different models based on linear regression and on multiple regression were developed to estimate GEPm. Chlorophyll-related indices including red-edge part of the spectrum in their formulation were the best predictors of GEPm, explaining most of its variability during the five consecutive years of observations characterized by different climatic conditions. Integrating mean midday photosynthetically active radiation into the model resulted in a general decrease in the accuracy of estimates. Also, the use of the reflectance approach instead of the VIs approach did not lead to considerably improved results in estimating GEPm.

scholarly journals Improving remote estimation of winter crops gross ecosystem production by inclusion of leaf area index in a spectral model

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5613 ◽  
Author(s):  
Radosław Juszczak ◽  
Bogna Uździcka ◽  
Marcin Stróżecki ◽  
Karolina Sakowska
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Spring Barley ◽  
Crop Productivity ◽  
Climatic Conditions ◽  
Area Index ◽  
Gross Ecosystem Production ◽  
Ecosystem Production ◽  
Winter Crops ◽  
Remote Estimation

The hysteresis of the seasonal relationships between vegetation indices (VIs) and gross ecosystem production (GEP) results in differences between these relationships during vegetative and reproductive phases of plant development cycle and may limit their applicability for estimation of croplands productivity over the entire season. To mitigate this problem and to increase the accuracy of remote sensing-based models for GEP estimation we developed a simple empirical model where greenness-related VIs are multiplied by the leaf area index (LAI). The product of this multiplication has the same seasonality as GEP, and specifically for vegetative periods of winter crops, it allowed the accuracy of GEP estimations to increase and resulted in a significant reduction of the hysteresis of VIs vs. GEP. Our objective was to test the multiyear relationships between VIs and daily GEP in order to develop more general models maintaining reliable performance when applied to years characterized by different climatic conditions. The general model parametrized with NDVI and LAI product allowed to estimate daily GEP of winter and spring crops with an error smaller than 14%, and the rate of GEP over- (for spring barley) or underestimation (for winter crops and potato) was smaller than 25%. The proposed approach may increase the accuracy of crop productivity estimation when greenness VIs are saturating early in the growing season.

scholarly journals A modeling approach for upscaling gross ecosystem production to the landscape scale using remote sensing data

2008 ◽  
Vol 113 (G3) ◽  
Author(s):  
Thomas Hilker ◽  
Nicholas C. Coops ◽  
Forrest G. Hall ◽  
T. Andrew Black ◽  
Baozhang Chen ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Remote Sensing Data ◽  
Landscape Scale ◽  
Gross Ecosystem Production ◽  
Sensing Data ◽  
Modeling Approach ◽  
Ecosystem Production

Short-term phosphorus addition increases soil respiration by promoting gross ecosystem production and litter decomposition in a typical temperate grassland in northern China

CATENA ◽  
2021 ◽  
Vol 197 ◽  
pp. 104952
Author(s):  
Jiayu Shi ◽  
Jirui Gong ◽  
Taoge-tao Baoyin ◽  
Qinpu Luo ◽  
Zhanwei Zhai ◽  
...  
Keyword(s):  
Soil Respiration ◽  
Litter Decomposition ◽  
Northern China ◽  
Temperate Grassland ◽  
Short Term ◽  
Phosphorus Addition ◽  
Gross Ecosystem Production ◽  
Ecosystem Production

Fluctuating water table affects gross ecosystem production and gross radiation use efficiency in a sedge-grass marsh

Hydrobiologia ◽  
2012 ◽  
Vol 692 (1) ◽  
pp. 57-66 ◽  
Author(s):  
J. Dušek ◽  
H. Čížková ◽  
S. Stellner ◽  
R. Czerný ◽  
J. Květ
Keyword(s):  
Water Table ◽  
Radiation Use Efficiency ◽  
Gross Ecosystem Production ◽  
Ecosystem Production ◽  
Use Efficiency ◽  
Radiation Use

Effects of leaf age and canopy structure on gross ecosystem production in a subtropical evergreen Chinese fir forest

2021 ◽  
Vol 310 ◽  
pp. 108618
Author(s):  
Qiaoli Wu ◽  
Conghe Song ◽  
Jinling Song ◽  
Jindi Wang ◽  
Shaoyuan Chen ◽  
...  
Keyword(s):  
Leaf Age ◽  
Canopy Structure ◽  
Chinese Fir ◽  
Gross Ecosystem Production ◽  
Ecosystem Production
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