Directions For Questions
The following passage explains the challenges
facing a population of trees and possible solutions.
Today, oaks are plagued with problems. There is
lack of regeneration in populations of certain spe-
cies. 4.010 such as the acorn weevil and the filbert
tne worm eat away at acorns and prevent
germination.By undermining the root systems of
seedlings andsaplings, ground squirrels, gophers,
and other small mammals often prevent these
young plants fromreaching tree size. Severe
diseases such as suddenoak death, kill many adult
oaks. Many mature oaks are having a tough time
withesuppression. Inthe past, with light surface fires,
the oaks had been able to maintain a stronghold
where other plantswere not able to compete and
died out. Now oaks are being toppled by trees that
have a higher toler-ance for shade and are not
fire-resistant; earliersuch trees would have been
killed when Native Americans set fires.Given all of
these challenges, the "old-growth" oaksthe large
old valley oaks, Garry oaks, coast live oaks, and
canyon live oaks that have huge girthand large
canopiesmay become a thing of the past. These
oaks in particular are important becausethere are
often more terrestrial vertebrates living in mature
oak stands than in seedling and sapling areas. This
prevalence of animals occurs becausethe large
crowns of such oaks provide cover and feeding
sites for a large variety of wildlife.The University of
California has embarked on an ambitious and
necessary research program calledthe Integrated
Hardwood Range ManagementProgram to explore
the significant causes of oak decline and offer
varied solutions. These includeinvestigating the use
of grassing regimes that are compatible with oak
seedling establishment reveg-etating sites with
native grasses to facilitate bettergermination of oak
seedling& documenting insectsand pathogens that
attack oaks, and exploring the ways that native
people managed oaks in the past. Scientists at the
Pacific Northwest Research Stationin Olympia,
Washington, and at Redwood NationalPark in
northern California are reintroducing theburning
practices of Native American& When used in Garry
oak ecosystems, fires keep Douglas firs from
encroaching on the oaks and promotethe growth of
wildflowers that are important foodplants. Further
investigations about these firepractices may be
essential in figuring out how to maintain oaks in the
western landscape today, given that the fires
address many of the factors that arenow causing
oak declinefrom how to eliminateinsect pests of
acorns to how to maintain an openstructure in oak
groves.Ecological restoration, the traditional
approach to woodland maintenance, refers to
humansintervening on a very limited time scale to
bringback plants and animals known to have
historicallyexisted in an area. The decline of oaks,
one of the most significant plants to Native
Americans, shows us that humans may play an
integral part in therestoration of oak areas. While
animals such as jayshave been recognized as
crucial partners in oakwell-being, human actions
through the eons may also have been key to the
oaks' flourishing.Sudden oak death, for example,
although ofexotic origin, may be curtailed locally by
thinningaround coastal oaks and tan oaks and
setting lightsurface fires, simulating ancient fire
managementpractices of Native Americans.
Indigenous shrubs and trees that grow in
association with oaksare hosts to the sudden oak
death pathogen. Bylimiting the growth of these
shrubs, burning thatmimics earlier Native American
ways may reduce opportunities for disease agents
to jump fromother plants to oak trees. With a more
open envi-ronment, it may be harder for sudden
oak death tospread.The oak landscapes that we
inherited, which still bear the marks of former
Native Americaninteractions, demand a new kind of
restoration thatcomplements other forms of
ecological restoration.This new kind of restoration
could be called eth-nobotanical restoration, defined
as re-establishing the historic plant communities of a
given areaand restoring indigenous harvesting,
vegetationmanagement, and cultivation practices
(seedbear-ing, burning, pruning, sowing, tilling, and
weeding)necessary to maintain these communities in
the long term.Thus, this kind of restoration is not
only aboutrestoring plants, but also about restoring
the humanplace within nature. Ethnobotanical
restoration isviewed not as a process that can be
completed, but rather as a continuous interaction
between people and plants, as both of their fates
are intertwined ina region. Using oaks (through
harvesting acornsand making products from all parts
of the tree) andhuman intervention (by thinning tree
populations and lighting light fires) may offer us
ways to benefi-cially co-exist while improving the
long-term healthand well-being of the remarkable
oak.
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