scholarly journals Refining the role of phenology in regulating gross ecosystem productivity across European peatlands

2019 ◽  
Vol 26 (2) ◽  
pp. 876-887 ◽  
Author(s):  
Franziska Koebsch ◽  
Oliver Sonnentag ◽  
Järvi Järveoja ◽  
Mikko Peltoniemi ◽  
Pavel Alekseychik ◽  
...  
Keyword(s):  
Ecosystem Productivity ◽  
Gross Ecosystem Productivity

Ecological responses of Stipa steppe in Inner Mongolia to experimentally increased temperature and precipitation. 4. Carbon exchange

2018 ◽  
Vol 40 (2) ◽  
pp. 159 ◽  
Author(s):  
Luomeng Chao ◽  
Zhiqiang Wan ◽  
Yulong Yan ◽  
Rui Gu ◽  
Yali Chen ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Air Temperature ◽  
Inner Mongolia ◽  
Ecosystem Respiration ◽  
Block Design ◽  
Net Ecosystem Exchange ◽  
Carbon Exchange ◽  
Ecosystem Productivity ◽  
Temperature And Precipitation ◽  
Gross Ecosystem Productivity

Aspects of carbon exchange were investigated in typical steppe east of Xilinhot city in Inner Mongolia. Four treatments with four replicates were imposed in a randomised block design: Control (C), warming (T), increased precipitation (P) and combined warming and increased precipitation (TP). Increased precipitation significantly increased both ecosystem respiration (ER) and soil respiration (SR) rates. Warming significantly reduced the ER rate but not the SR rate. The combination of increased precipitation and warming produced an intermediate response. The sensitivity of ER and SR to soil temperature and air temperature was assessed by calculating Q10 values: the increase in respiration for a 10°C increase in temperature. Q10 was lowest under T and TP, and highest under P. Both ER and SR all had significantly positive correlation with soil moisture. Increased precipitation increased net ecosystem exchange and gross ecosystem productivity, whereas warming reduced them. The combination of warming and increased precipitation had an intermediate effect. Both net ecosystem exchange and gross ecosystem productivity were positively related to soil moisture and negatively related to soil and air temperature. These findings suggest that predicted climate change in this region, involving both increased precipitation and warmer temperatures, will increase the net ecosystem exchange in the Stipa steppe meaning that the ecosystem will fix more carbon.

Remote sensing of tundra gross ecosystem productivity and light use efficiency under varying temperature and moisture conditions

2010 ◽  
Vol 114 (3) ◽  
pp. 481-489 ◽  
Author(s):  
K.F Huemmrich ◽  
J.A. Gamon ◽  
C.E. Tweedie ◽  
S.F. Oberbauer ◽  
G. Kinoshita ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Light Use Efficiency ◽  
Ecosystem Productivity ◽  
Gross Ecosystem Productivity ◽  
Use Efficiency ◽  
Moisture Conditions

scholarly journals The influence of balanced and imbalanced resource supply on biodiversity–functioning relationship across ecosystems

2016 ◽  
Vol 371 (1694) ◽  
pp. 20150283 ◽  
Author(s):  
Aleksandra M. Lewandowska ◽  
Antje Biermann ◽  
Elizabeth T. Borer ◽  
Miguel A. Cebrián-Piqueras ◽  
Steven A. J. Declerck ◽  
...  
Keyword(s):  
Ecosystem Functioning ◽  
Structural Equation ◽  
Meta Analysis ◽  
Experimental Studies ◽  
Equation Model ◽  
Ecosystem Productivity ◽  
Multiple Resources ◽  
Lower Productivity ◽  
Geographical Regions

Numerous studies show that increasing species richness leads to higher ecosystem productivity. This effect is often attributed to more efficient portioning of multiple resources in communities with higher numbers of competing species, indicating the role of resource supply and stoichiometry for biodiversity–ecosystem functioning relationships. Here, we merged theory on ecological stoichiometry with a framework of biodiversity–ecosystem functioning to understand how resource use transfers into primary production. We applied a structural equation model to define patterns of diversity–productivity relationships with respect to available resources. Meta-analysis was used to summarize the findings across ecosystem types ranging from aquatic ecosystems to grasslands and forests. As hypothesized, resource supply increased realized productivity and richness, but we found significant differences between ecosystems and study types. Increased richness was associated with increased productivity, although this effect was not seen in experiments. More even communities had lower productivity, indicating that biomass production is often maintained by a few dominant species, and reduced dominance generally reduced ecosystem productivity. This synthesis, which integrates observational and experimental studies in a variety of ecosystems and geographical regions, exposes common patterns and differences in biodiversity–functioning relationships, and increases the mechanistic understanding of changes in ecosystems productivity.

scholarly journals Response of gross ecosystem productivity, light use efficiency, and water use efficiency of Mongolian steppe to seasonal variations in soil moisture

2008 ◽  
Vol 113 (G1) ◽  
pp. n/a-n/a ◽  
Author(s):  
Sheng-Gong Li ◽  
Werner Eugster ◽  
Jun Asanuma ◽  
Ayumi Kotani ◽  
Gombo Davaa ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Water Use Efficiency ◽  
Water Use ◽  
Seasonal Variations ◽  
Light Use Efficiency ◽  
Ecosystem Productivity ◽  
Gross Ecosystem Productivity ◽  
Use Efficiency

scholarly journals NATURAL REGENERATION OF CONIFEROUS FORESTS OF THE LOWER ANGARA REGION AFTER THE FIRES OF VARYING INTENSITY

ÈKOBIOTEH ◽  
2020 ◽  
Vol 3 (3) ◽  
pp. 536-539
Author(s):  
S.V. Zhila ◽  
◽  
G.A. Ivanova ◽  
Keyword(s):  
Forest Ecosystem ◽  
Natural Regeneration ◽  
Forest Ecosystems ◽  
Qualitative Assessment ◽  
Coniferous Forests ◽  
Ecosystem Productivity ◽  
Environmental Processes ◽  
Global Environmental ◽  
Coniferous Plantations

The issue of forest ecosystem productivity and stability of Siberia has not lost its relevance today. The study of this issue is directly related to the assessment of the role of forest ecosystems in global environmental processes. Every year on the territory of Siberia there are thousands of fires, most of which falls on the light coniferous plantations. In connection with what was shown in the quantitative and qualitative assessment of post-natural resumption after fires of different intensity.

scholarly journals Soil respiration of a Moso bamboo forest significantly affected by gross ecosystem productivity and leaf area index in an extreme drought event

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5747 ◽  
Author(s):  
Yuli Liu ◽  
Guomo Zhou ◽  
Huaqiang Du ◽  
Frank Berninger ◽  
Fangjie Mao ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Soil Respiration ◽  
Soil Temperature ◽  
Leaf Area Index ◽  
Leaf Area ◽  
Moso Bamboo ◽  
Drought Event ◽  
Ecosystem Productivity ◽  
Area Index ◽  
Gross Ecosystem Productivity

Moso bamboo has large potential to alleviate global warming through carbon sequestration. Since soil respiration (Rs) is a major source of CO2 emissions, we analyzed the dynamics of soil respiration (Rs) and its relation to environmental factors in a Moso bamboo (Phllostachys heterocycla cv. pubescens) forest to identify the relative importance of biotic and abiotic drivers of respiration. Annual average Rs was 44.07 t CO2 ha−1 a−1. Rs correlated significantly with soil temperature (P < 0.01), which explained 69.7% of the variation in Rs at a diurnal scale. Soil moisture was correlated significantly with Rs on a daily scale except not during winter, indicating it affected Rs. A model including both soil temperature and soil moisture explained 93.6% of seasonal variations in Rs. The relationship between Rs and soil temperature during a day showed a clear hysteresis. Rs was significantly and positively (P < 0.01) related to gross ecosystem productivity and leaf area index, demonstrating the significance of biotic factors as crucial drivers of Rs.

The Phenology of Gross Ecosystem Productivity and Ecosystem Respiration in Temperate Hardwood and Conifer Chronosequences

2009 ◽  
pp. 59-85 ◽  
Author(s):  
Asko Noormets ◽  
Jiquan Chen ◽  
Lianhong Gu ◽  
Ankur Desai
Keyword(s):  
Ecosystem Respiration ◽  
Ecosystem Productivity ◽  
Gross Ecosystem Productivity

Effect of Drought-Induced Salinization on Wetland Methane Emissions, Gross Ecosystem Productivity, and Their Interactions

Ecosystems ◽  
2019 ◽  
Vol 23 (3) ◽  
pp. 675-688 ◽  
Author(s):  
Samuel D. Chamberlain ◽  
Kyle S. Hemes ◽  
Elke Eichelmann ◽  
Daphne J. Szutu ◽  
Joseph G. Verfaillie ◽  
...  
Keyword(s):  
Methane Emissions ◽  
Ecosystem Productivity ◽  
Gross Ecosystem Productivity
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