Abstract
Summary Rates of tree mortality are increasing globally, with implications for forests and climate. Yet, how and why these trends vary globally remain unknown. Developing a comprehensive assessment of global tree mortality will require systematically integrating data from ground‐based long‐term forest monitoring with large‐scale remote sensing. We surveyed the metadata from 466 865 forest monitoring plots across 89 countries and five continents using questionnaires and discuss the potential to use these to estimate tree mortality trends globally. Our survey shows that the area monitored has increased steadily since 1960, but we also identify many regions with limited ground‐based information on tree mortality. The integration of existing ground‐based forest inventories with remote sensing and modelling can potentially fill those gaps, but this requires development of technical solutions and agreements that enable seamless flows of information from the field to global assessments of tree mortality. A truly global monitoring effort should promote fair and equitable collaborations, transferring funding to and empowering scientists from less wealthy regions. Increasing interest in forests as a natural climate solution, the advancement of new technologies and world‐wide connectivity means that now a global monitoring system of tree mortality is not just urgently needed but also possible.
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Claims 4
Claim · model-written summary
The area monitored for tree mortality has increased steadily since 1960.
Verbatim
e0“Rates of tree mortality are increasing globally”
e1“Our survey shows that the area monitored has increased steadily since 1960”
Claim · model-written summary
Many regions have limited ground-based information on tree mortality.
Verbatim
e0“Rates of tree mortality are increasing globally”
e2“we also identify many regions with limited ground‐based information on tree mortality”
Claim · model-written summary
Integrating ground-based forest inventories with remote sensing and modelling can potentially fill the gaps in global tree mortality information.
Verbatim
e0“Rates of tree mortality are increasing globally”
e3“The integration of existing ground‐based forest inventories with remote sensing and modelling can potentially fill those gaps”
Claim · model-written summary
A global tree mortality monitoring effort should promote fair and equitable collaborations.
Verbatim
e0“Rates of tree mortality are increasing globally”
e4“A truly global monitoring effort should promote fair and equitable collaborations”