Environmental Assessment
Volume C-4.2
Slurry Pipeline
Fauna
Ambatovy Project
106
January 2006
Residual Impact Classification
Residual impacts as a result of indirect effects are provided in Table 4.2-6.
Table 4.2-6 Residual Impact Classification for Fauna due to Indirect Habitat Loss
Taxon
Direction Magnitude Geographic
Extent
Duration
Reversibility Frequency Environmental
Consequence
Issue: Sensory Disturbance – Noise
species using
vocalization for
breeding
negative
low
local
short-term
reversible
low
negligible
wary species
negative
low
local
short-term
reversible
low
negligible
other species
neutral to
negative
negligible
local
short-term
reversible
low
negligible
Issue: Edge Effects
azonal
neutral
n/a
n/a
n/a
n/a
n/a
n/a
transitional
negative
low
local
long-term
reversible
low
low
degraded zonal forest
negative
moderate
local
long-term
reversible
low
moderate
primary zonal forest
negative
low
local
long-term
reversible
low
low
marsh edge
neutral
n/a
n/a
n/a
n/a
n/a
n/a
wetlands
negative
low
local
medium to
long-term
reversible
low
low
water
negative
low
local
medium to
long-term
reversible
low
low
coastal shrubland/
grassland complex
(a)
negative
low
local
long-term
reversible
low
low
faunal species
negative
low
local
medium-
term
reversible
low
low
(a)
Includes beach ridge habitat type.
n/a = Not applicable (neutral impacts not rated).
Sensory Disturbance
Noise
The environmental consequence of project-generated noise is negative and
negligible for potentially affected species because the noise levels are predicted
to be low, occur primarily during construction and only affect the local area.
Project-related noise effects will be very low and infrequent during operations
and removed at closure.
Edge Effects
Dust, Invasive Species and Changes in Microclimate
The environmental consequence of edge effects due to dust, invasive species
encroachment and changes in microclimate is negative and moderate for
degraded zonal forest because the magnitude of the indirect habitat loss is
moderate and the duration is long-term because it will last until the habitat is
