Terrestrial ecosystem carbon dynamics and climate feedbacks

  title={Terrestrial ecosystem carbon dynamics and climate feedbacks},
  author={Martin Heimann and Markus Reichstein},
Recent evidence suggests that, on a global scale, terrestrial ecosystems will provide a positive feedback in a warming world, albeit of uncertain magnitude. 
Microbial mediation of carbon-cycle feedbacks to climate warming
A study based on a long-term manipulation experiment in a grassland ecosystem describes the microbial mechanisms controlling feedbacks to carbon and nutrient cycling under warming. The findings
Biogeochemistry: Soil carbon breakdown
Model projections of future climate are highly sensitive to the assumed response of organic matter decomposition to changes in temperature. Incubation experiments on North American soils suggest that
Carbon response to changing winter conditions in northern regions: current understanding and emerging research needs
Winter is an important period for ecological processes in northern regions; however, compared to other seasons, the impacts of winter climate on ecosystems are poorly understood. In this review we ...
Global nitrogen deposition and carbon sinks
Land and ocean carbon sinks play a critical role in determining atmospheric carbon dioxide levels. Nitrogen-induced increases in land and ocean sink strength are unlikely to keep pace with future
An Uncertain Future for Soil Carbon
A detailed knowledge of how carbon cycles through soils is crucial for predicting future atmospheric carbon dioxide concentrations.
Integrating plant-soil interactions into global carbon cycle models
1. Plant–soil interactions play a central role in the biogeochemical carbon (C), nitrogen (N) and hydrological cycles. In the context of global environmental change, they are important both in
Temperature sensitivity of decomposition in a boreal mixed mire in northern Sweden
Carbon accumulation in soils constitutes a significant sink for carbon. How the climate change with increasing temperatures will affect the soil carbon storage represents uncertainty of the predict
Climate extremes and the carbon cycle
The mechanisms and impacts of climate extremes on the terrestrial carbon cycle are explored, and a pathway to improve the understanding of present and future impacts ofClimate extremes onThe terrestrial carbon budget is proposed.
Ecological controls of rhizosphere processes and soil organic matter dynamics at a Sub-Arctic treeline
Rapid climate change in the Arctic and Sub-Arctic is causing vegetation change across large areas of tundra. Shrubs and trees are undergoing range expansions as part of an over-all trend of ‘greeni


The global carbon cycle: integrating humans, climate and the natural world.
This work is an assessment of the state of current knowledge of the carbon cycle by a group of leading experts. It gives an introductory overview of the carbon cycle and covers both biophysical and
Determinants of terrestrial ecosystem carbon balance inferred from European eddy covariance flux sites
Pioneering work in the last century has resulted in a widely accepted paradigm that primary production is strongly positively related to temperature and water availability such that the northern
Climate-carbon cycle feedback analysis: Results from the C
Eleven coupled climate–carbon cycle models used a common protocol to study the coupling between climate change and the carbon cycle. The models were forced by historical emissions and the
Europe-wide reduction in primary productivity caused by the heat and drought in 2003
An increase in future drought events could turn temperate ecosystems into carbon sources, contributing to positive carbon-climate feedbacks already anticipated in the tropics and at high latitudes.
Temperature sensitivity of soil carbon decomposition and feedbacks to climate change
This work has suggested that several environmental constraints obscure the intrinsic temperature sensitivity of substrate decomposition, causing lower observed ‘apparent’ temperature sensitivity, and these constraints may, themselves, be sensitive to climate.
Carbon in Amazon Forests: Unexpected Seasonal Fluxes and Disturbance-Induced Losses
Biometric observations confirmed the net loss of carbon but imply that it is a transient effect of recent disturbance superimposed on long-term balance, likely that carbon sequestration is lower than has been inferred from recent eddy covariance studies at undisturbed sites.
Rainfall Variability, Carbon Cycling, and Plant Species Diversity in a Mesic Grassland
The results show that projected increases in rainfall variability can rapidly alter key carbon cycling processes and plant community composition, independent of changes in total precipitation.
Carbon input to soil may decrease soil carbon content
It is commonly predicted that the intensity of primary production and soil carbon (C) content are positively linked. Paradoxically, many long-term field observations show that although plant litter
Indirect radiative forcing of climate change through ozone effects on the land-carbon sink
A significant suppression of the global land-carbon sink is found as increases in ozone concentrations affect plant productivity, and the resulting indirect radiative forcing by ozone effects on plants could contribute more to global warming than the direct radiativeforcing due to tropospheric ozone increases.
Nitrogen limitation constrains sustainability of ecosystem response to CO2
It is shown, after a six-year field study of perennial grassland species grown under ambient and elevated levels of CO2 and N, that low availability of N progressively suppresses the positive response of plant biomass to elevated CO2.