Effect on Terrestrial Ecosystems
|A botanical assessment
undertaken by Land care research indicates the red / silver
beech forest through which the track will be built alongside
the penstock is typical of such forest in the region and is
present in many DOC reserves. The lake Matiri shoreline has
64% beech forest on steep slopes and 36% shallow sloping herbaceous
vegetation which has in the past been extensively grazed by
cattle and is now dominated by naturalized species. No rare
or threatened species have been identified in the area.
During construction of the scheme some vegetation will be removed
from the bush forest area and heavy machinery operating in the
environment will cause some damage. New Zealand Energy will
work closely with the Department of Conservation to limit the
extent of disturbance to an acceptable and practical minimum.
Typical bush section of proposed track and penstock route.
|Where practical New
Zealand Energy will replace trees and shrubs removed during
construction of the access track, penstock line, powerhouse
and tailrace. Humus and duff material will be stockpiled during
initial vegetation clearance and replaced on exposed areas of
soil such as cut batters in order to ensure rapid reinstatement
of native plant cover.
|Typical Lake Matiri shoreline with
beech forest on steep slopes.
||Typical Lake Matiri shoreline with
shallow sloping herbaceous vegetation.
|As lake Matiri will
be operated within the natural lake level but with the average
mean level slightly raised, a possible result is that the herbaceous
vegetation zone (comprising mainly adventive rushes) may simply
move "up slope" a little. The overall effect on shoreline
vegetation is expected to be negligible.