ITMN Online seminar with Craig D. Allen June 22 (5 pm CEST)
by Henrik Hartmann
Dear all,
The International Tree Mortality Network, an initiative of the IUFRO
task force on monitoring trends and patterns in global tree mortality,
continues the online seminar series join on *June 22, 5 pm CEST*, with:
*Dr. Craig D. Allen*
*Title: The global emergence of hotter-drought drivers of forest
disturbance tipping points*
_Abstract:_ Current research is presented on global-scale patterns and
trends of forest responses to increasingly hotter droughts, particularly
extensive tree mortality and forest die-offs involving a range of
interactive disturbances (e.g., water stress, insect outbreaks,
high-severity wildfire). Diverse cross-scale observations and empirical
findings increasingly indicate that amelioration of hotter-drought
stress via fertilization of photosynthesis from elevated atmospheric CO2
concentrations may soon be overwhelmed by heat and accelerated
atmospheric drought. These findings highlight some current challenges in
realistically projecting the future of global forest ecosystems (and
their associated carbon pools and fluxes) with process-based Earth
system models. In particular there is substantial evidence that forests
dominated by larger, older trees may be disproportionately vulnerable to
increased growth stress and mortality under hotter-drought conditions.
The fates of these old trees in response to global change are of vital
importance, given that they are essential as: a) disproportionately
large carbon sinks; b) among the most biodiverse and rare terrestrial
ecosystems; c) irreplaceable archives of environmental history; and d)
venerated for many cultural reasons. Key scientific uncertainties that
impede modeling progress are outlined, and examples of promising
empirical modeling approaches are illustrated.
_Bio:_ Craig D. Allen is an adjunct professor in the Department of
Geography & Environmental Studies at the University of New Mexico. He
recently retired as a research ecologist and founding leader of the New
Mexico Landscapes Field Station for the U.S. Geological Survey, based at
Bandelier National Monument in the Jemez Mountains of northern New
Mexico, where he has conducted ecological research since 1981. Craig
conducts place-based, long-term research on the ecology and
environmental history of southwestern US landscapes, and the responses
of western US mountain ecosystems and forests globally to climate
change, with many international collaborations. Since 1986 his office
has been co-located with land managers at Bandelier National Monument
where he continues to collaboratively volunteer, reflecting his
commitment to provide scientific and technical support to diverse land
management agencies, Native American tribes, and governmental and
non-governmental organizations. Craig received B.S. and M.S. degrees in
Geography from the University of Wisconsin-Madison, and a Ph.D. in
Wildland Resource Science (forest & landscape ecology, conservation
biology) from the University of California-Berkeley. He is an elected
fellow of the Ecological Society of America (ESA) and the American
Association for the Advancement of Science (AAAS).
*Please register for the Zoom Webinar: *
https://zoom.us/webinar/register/8116233165351/WN_ge7sLbEyS16YUUA5FAJ9Ig
<https://zoom.us/webinar/register/8116233165351/WN_ge7sLbEyS16YUUA5FAJ9Ig>
Note that the talks might be recorded.
*
*
*Previous seminars:*
Seminar # 1: Matt Hansen - Global forest monitoring using satellite data
https://youtu.be/snUSGNb9bAQ <https://youtu.be/snUSGNb9bAQ>
Seminar # 2: Flavia Costa - Tree mortality in the Amazon
https://youtu.be/5wmzX9ldn4Q <https://youtu.be/5wmzX9ldn4Q>
Seminar #3: Belinda Medlyn
https://youtu.be/T6S9VKklbyc <https://youtu.be/T6S9VKklbyc>
Seminar #4: Nate McDowell
https://youtu.be/vdAXQ8CibKA <https://youtu.be/vdAXQ8CibKA>
Seminar #5: Lisa Hülsmann
https://youtu.be/Yzsa0p7lq7c <https://youtu.be/Yzsa0p7lq7c>
*Visit us at:*
https://www.tree-mortality.net/ <https://www.tree-mortality.net/>
https://www.iufro.org/science/task-forces/tree-mortality-patterns/
<https://www.iufro.org/science/task-forces/tree-mortality-patterns/>
---
Dr. (habil.) Henrik Hartmann
Group leader
Plant Allocation
MPI for Biogeochemistry
Hans Knöll Str. 10
07745 Jena, Germany
Contact:hhart@bgc-jena.mpg.de <mailto:hhart@bgc-jena.mpg.de>
Phone:+49.3641.576294
Mobile:+49.171.8188273
Website:
https://www.bgc-jena.mpg.de/bgp/index.php/HenrikHartmann/HenrikHartmann
<https://www.bgc-jena.mpg.de/bgp/index.php/HenrikHartmann/HenrikHartmann>
*Initiatives*:
International Tree Mortality Network
https://www.tree-mortality.net/ <https://www.tree-mortality.net/>
IUFRO Task Force on monitoring of global tree mortality patterns and trends
https://www.iufro.org/science/task-forces/tree-mortality-patterns/
<https://www.iufro.org/science/task-forces/tree-mortality-patterns/>
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2 years, 10 months
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