Tree stems from wetland, floodplain and upland forests can produce and emit methane (CH
4). Tree CH 4 stem emissions have high spatial and temporal variability, but there is no
consensus on the biophysical mechanisms that drive stem CH 4 production and emissions.
Here, we summarize up to 30 opportunities and challenges for stem CH 4 emissions
research, which, when addressed, will improve estimates of the magnitudes, patterns and
drivers of CH 4 emissions and trace their potential origin. We identified the need:(1) for both …

Tree stems from wetland, floodplain and upland forests can produce and emit methane
(CH4). Tree CH4 stem emissions have high spatial and temporal variability, but there is no
consensus on the biophysical mechanisms that drive stem CH4 production and emissions.
Here, we summarize up to 30 opportunities and challenges for stem CH4 emissions
research, which when addressed will improve estimates of magnitudes, patterns, drivers and
trace the potential origin of CH4 emissions. We identified the need (i) for both long-term high …