Vegetation Clearing
MassWildlife's
Upland Program is attempting to reclaim early-successional habitats
throughout the state by setting back succession on many abandoned
field areas using machines such as the Brontosaurus, T-rex and other
landclearing machines. The Brontosaurus and the T-rex, two appropriately
named machines, can efficiently mulch or "eat" a standing tree up
to six inches in diameter. Tree shears, machines that grip and snip
trees off at the stump and lay them in piles, handle what the others
can't.
Landclearing
companies are generally contracted to perform this work. Even though
much clearing does take place, not all trees and shrubs are cut
from a project area. Many trees and shrubs that provide valuable
food and cover for wildlife are specifically retained. Some of these
include dogwoods, viburnums, serviceberry, cherries, and various
oaks, among others. However, invasive exotic plants are specifically
targeted for control.
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Many
shrubs and trees such as serviceberry (left) are retained for
the wildilfe food and cover resources that they provide. However,
invasive exotic plants, including asiatic bittersweet (right),
are specifically targeted for control.
Invasive Exotic
Plant Control
Invasive
exotic plants are those that have been purposefully or unintentionally
introduced into an area where they are not native. Aldo Leopold,
father of wildlife management in this country once said, "Good or
bad is not a matter of species, it is a matter of numbers." This
certainly holds true for invasive exotic plants. There are approximately
900 introduced plant species in Massachusetts. Most are benign and
are enjoyed by many as landscape and garden plants. However, others
spread rapidly, become difficult to control or eradicate, and degrade
our natural communities by outcompeting native species for resources.
European and glossy buckthorn, multiflora rose, Asiatic bittersweet,
autumn olive, and purple loosestrife are just a few examples of
invasive exotic species that are causing ecological damage throughout
the state. In fact, invasive exotics have been implicated in contributing
to the decline of 42% of those species listed as threatened or endangered
by the US Fish and Wildlife Service.

This
old hayfield in western Massachusetts is dominated by glossy buckthorn
sprouts.
The
Upland Program strives to control invasive exotic plants on all
project sites. Various control options are weighed for each project
site. In most cases, herbicides are used since they provide the
most effective means of controling invasive exotic plants. Other,
non-chemical techniques will work in some instances (e.g., hand-pulling
of seedlings). However, when root systems become well developed,
techniques like pulling become less effective and can even contribute
to a worse invasion. Mature root systems are difficult to pull out
entirely. If root segments are left in the soil, they will often
times resprout. Additionally, the soil disturbance created after
pulling out a plant, creates a perfect bed for seeds of invasive
exotic plants to germinate. Check the "links"
and "references"
sections for more information on invasive exotic plants and how
to control them.
Herbicide applications are typically done by contractors licensed
and certified by the Massachusetts
Pesticide Bureau within the Department
of Food and Agriculture (MDFA). Only those herbicides approved
by the MDFA and the Massachusetts
Department of Environmental Protection for use in sensitive
areas are used. Sensitive areas include areas within 400 feet of
a public ground water supply well, within 100 feet of a public surface
water supply, within 50 feet of private water supplies, within 10
feet of surface waters and wetlands, and within agricultural and
habitated areas. All other federal, state, and local regulations
are also followed including the Wetlands
Protection Act.
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Photos by (in order of appearance):
Bill Byrne; remainder by Jim Oehler.


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