Woodland - Winter 2019 - 11

Lutz, a research assistant professor
of environmental studies at
Dartmouth.
In the U.S. alone, maple syrup
production was valued at $141
million in 2017 according to the
U.S. Department of Agriculture. As
for world share, the Federation of
Québec Maple Syrup Producers
reported in 2017 that Canada is
home to 80 percent of world maple

syrup production of which 72
percent is produced in Québec, and
20 percent is produced in the U.S.
The researchers call for additional
studies on climate change and
maple syrup production, which
can help maple syrup producers,
forest managers and policymakers
prepare for changes that are already
impacting a multimillion-dollar
industry.
A

ISTOCK.COM/JASONONDREICKA

how past changes in minimum and
maximum temperatures affected
sap flow at each of the sites. They
created a model that predicted the
timing for optimal sap flow based on
historical temperature data pertaining
to the freeze-thaw days, actual
sap collection from their fieldwork,
and monthly climate. To calculate
projections on how climate change
will affect maple syrup production,
the team used climate models based
on the RCP 8.5 carbon emissions
scenario, which follows current
emissions trends.
The study found that most sap
collection seasons were 45 days
or fewer and that the middle of the
sugar maple tapping season tended
to fall in March or later for threequarters of the sites.
According to modeling projections,
by the end of the century, the
team found that tapping season is
projected to be, on average, one
month earlier. In addition, it is likely
that by 2100, Virginia and Indiana
will barely be able to produce any
sap while production in Québec will
be considerably enhanced. Of the
states in the study, New Hampshire
and Vermont (not one of the sample
sites but for which climate data was
analyzed) are likely to be the least
affected but will still experience
decreases in syrup production.
By the end of the century, most of
the areas containing sugar maples
in the U.S. are projected to see
decreases in maple syrup production
while areas in northern Ontario and
Québec may see moderate to large
increases in production. In addition,
the concentration of sap sugar is
likely to become lower and more
variable (28-36% lower across the
modeled sites).
"As the climate gets warmer,
the sugar maple tapping season
will shrink and will get closer to
a December date. Maple syrup
producers may want to consider
adapting their technologies and
collection logistics in advance, so
that they are prepared for how
climate change is going to affect
production," said co-author David

HOW BATS RELOCATE IN RESPONSE TO TREE LOSS
SOURCE: WILEY

Identifying how groups of animals select where to live is important for
understanding social dynamics and for management and conservation.
In a recent Journal of Wildlife Management study, researchers examined
the movement of a maternity colony of big brown bats as a response to
naturally occurring tree loss.
The colony began moving to a new patch of forest approximately
seven kilometers away when cumulative loss of trees, over three years,
in the old patch reached 18%. Most bats roosted in the new patch by
year four, when cumulative loss of roost trees reached 46%.
The authors noted that to maintain high densities of suitable roost
trees for bats, management plans must retain live and dead trees in
multiple stages of growth and decay.
"This is the first time that the movement of bats in response to a
natural loss of roost trees has been documented. Our work suggests
that general patterns for how bats respond to loss of roost trees may
exist across bat species and forest types," said lead author Kristin
Bondo, MSc, PhD, of the University of Regina, in Canada.
A

Winter 2019 * WOODLAND 11


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Woodland - Winter 2019

Table of Contents for the Digital Edition of Woodland - Winter 2019

OVERSTORY
FORESTS AND FAMILIES
FOREST INTERACTIONS Seedlings
2019 Outstanding Tree Farmers of the Year
Giving Back for the Forests of Tomorrow
Policies And Partnerships Go Hand In Hand For Strong Forests
TOOLS AND RESOURCES
Woodland - Winter 2019 - Intro
Woodland - Winter 2019 - cover1
Woodland - Winter 2019 - cover2
Woodland - Winter 2019 - 3
Woodland - Winter 2019 - OVERSTORY
Woodland - Winter 2019 - 5
Woodland - Winter 2019 - FORESTS AND FAMILIES
Woodland - Winter 2019 - 7
Woodland - Winter 2019 - 8
Woodland - Winter 2019 - 9
Woodland - Winter 2019 - FOREST INTERACTIONS Seedlings
Woodland - Winter 2019 - 11
Woodland - Winter 2019 - 12
Woodland - Winter 2019 - 13
Woodland - Winter 2019 - 14
Woodland - Winter 2019 - 15
Woodland - Winter 2019 - 16
Woodland - Winter 2019 - 17
Woodland - Winter 2019 - 18
Woodland - Winter 2019 - 19
Woodland - Winter 2019 - 2019 Outstanding Tree Farmers of the Year
Woodland - Winter 2019 - 21
Woodland - Winter 2019 - 22
Woodland - Winter 2019 - 23
Woodland - Winter 2019 - 24
Woodland - Winter 2019 - 25
Woodland - Winter 2019 - Giving Back for the Forests of Tomorrow
Woodland - Winter 2019 - 27
Woodland - Winter 2019 - 28
Woodland - Winter 2019 - 29
Woodland - Winter 2019 - 30
Woodland - Winter 2019 - Policies And Partnerships Go Hand In Hand For Strong Forests
Woodland - Winter 2019 - 32
Woodland - Winter 2019 - 33
Woodland - Winter 2019 - 34
Woodland - Winter 2019 - 35
Woodland - Winter 2019 - TOOLS AND RESOURCES
Woodland - Winter 2019 - 37
Woodland - Winter 2019 - 38
Woodland - Winter 2019 - cover3
Woodland - Winter 2019 - cover4
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