NYS Department of Environmental Conservation
Grass Carp-Yaphank Lakes
•Impact on
Target Plant Species- milfoil-
low; fanwort- moderate
•Impact on
Native Plant Species-
–Lower Lake coontail- low; bladderwort-
moderate
–Upper Lake worts, pondweed-high;
naiads,
floating pondweed- moderate;
lilies-
low;
•Impact on
Native Animal Species- low
if low stocking rate
•Post-Treatment
Plant Coverage
–Lower Lake- f (stocking rate); expected
low
–Upper Lake- f (stocking rate); expected
moderate
•Water quality
changes some turbidity
release
nutrients / algal bloom ?
•Ecological
impacts loss of spawning
grounds
loss
of cover
•Downstream
impacts significant if fish
escape
nutrient
release downstream
•Potential for
regrowth high (assuming
native plant rebound)
•Recreational
Impacts During Treatment loss
of fishing edge after treatment
•Likelihood of
Suboptimal Results moderate
to high (especially Upper)