References of "Kutsch, W. L"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailField measurements of soil respiration: Principles and constraints, potentials and limitations of different methods
Pumpanen, J.; Longdoz, Bernard ULiege; Kutsch, W. L.

in Kutsch, Werner; Bahn, Michael; Heinemeyer, Andreas (Eds.) Soil Carbon Dynamics: An Integrated Methodology (2010)

INTRODUCTION Soil respiration is a major component in the carbon balance of terrestrial ecosystems and has been measured in the field for more than eight decades. In this chapter, we will describe the ... [more ▼]

INTRODUCTION Soil respiration is a major component in the carbon balance of terrestrial ecosystems and has been measured in the field for more than eight decades. In this chapter, we will describe the measurement of soil CO2 efflux at the soil surface that can be considered as equivalent to soil CO2 production when integrated over long time periods (week, month or season). At shorter time scales the transport of CO2 may uncouple the soil CO2 efflux from its production inside the soil. Different methods have been developed to measure this efflux. These methods can affect the object being measured by disturbing the biochemical processes involved in CO2 production, the physical properties influencing CO2 movement towards the soil surface, or by changing the environmental conditions in the soil. Therefore, soil respiration measurements in the field are one of the most difficult among the ecosystem flux measurements. So far, no single method has been established as the standard but comparisons, which give important indications on their accuracy, have been performed. The choice of the measurement methodology is not limited to that of a measurement system. The experimenter has to elaborate a protocol depending on the temporal and spatial scales studied. In this chapter, we will describe the most commonly used methodologies for measuring soil CO2 efflux and present their history, principles and constraints (Section 2.2). © Cambridge University Press 2009. [less ▲]

Detailed reference viewed: 26 (2 ULiège)
Full Text
Peer Reviewed
See detailInfluence of spring and autumn phenological transitions on forest ecosystem productivity
Richardson, A. D.; Black, T. A.; Ciais, P. et al

in Philosophical Transactions of the Royal Society B: Biological Sciences (2010), 365(1555), 3227-3246

We use eddy covariance measurements of net ecosystem productivity (NEP) from 21 FLUXNET sites (153 site-years of data) to investigate relationships between phenology and productivity (in terms of both NEP ... [more ▼]

We use eddy covariance measurements of net ecosystem productivity (NEP) from 21 FLUXNET sites (153 site-years of data) to investigate relationships between phenology and productivity (in terms of both NEP and gross ecosystem photosynthesis, GEP) in temperate and boreal forests. Results are used to evaluate the plausibility of four different conceptual models. Phenological indicators were derived from the eddy covariance time series, and from remote sensing and models. We examine spatial patterns (across sites) and temporal patterns (across years); an important conclusion is that it is likely that neither of these accurately represents how productivity will respond to future phenological shifts resulting from ongoing climate change. In spring and autumn, increased GEP resulting from an 'extra' day tends to be offset by concurrent, but smaller, increases in ecosystem respiration, and thus the effect on NEP is still positive. Spring productivity anomalies appear to have carry-over effects that translate to productivity anomalies in the following autumn, but it is not clear that these result directly from phenological anomalies. Finally, the productivity of evergreen needleleaf forests is less sensitive to phenology than is productivity of deciduous broadleaf forests. This has implications for how climate change may drive shifts in competition within mixed-species stands. © 2010 The Royal Society. [less ▲]

Detailed reference viewed: 12 (1 ULiège)
Full Text
Peer Reviewed
See detailManagement effects on European cropland respiration
Eugster, W.; Moffat, A. M.; Ceschia, E. et al

in Agriculture, Ecosystems & Environment (2010), 139

Detailed reference viewed: 65 (7 ULiège)
Full Text
Peer Reviewed
See detailThe net biome production of full crop rotations in Europe
Kutsch, W. L.; Aubinet, Marc ULiege; Buchmann, N. et al

in Agriculture, Ecosystems & Environment (2010), 139

Detailed reference viewed: 44 (7 ULiège)