|
|
Annual Aquatic Macro-Invertebrate Collection
|
|
Every year Salmon Brook Watershed Association joins with
other groups around the state to collect and survey for aquatic
macro-invertebrates. These stream-bottom dwelling insect
nymphs are excellent indicators of stream health due to their
sensitivity to pollution. Two sites are typically used by the SBWA;
one at Bryan's Landing off of Canal Road and one at Salmon Brook
Park. We generally hope for enough volunteers for at least six to
eight people at each site. Each day consists of a couple of stream
kicks, gently disturbing the stream bottom to catch the disturbed
organisms in nets. Volunteers on land then identify and count the
different species. Aquatic macro-invertebrates are the juvenile
forms of such insects as stoneflies, mayflies, dragonflies, caddis
flies, water pennies and water striders. The overall data as well as
some samples are then turned over to the CT Department of
Environmental Protection to be examined. The combined results
from similar collections that were undertaken by other groups
around the state will give the DEP an idea of the overall health of
the Connecticut River System. Past results have indicated very
healthy streams and tributaries throughout Granby and the
Farmington Valley. Some volunteers have participated in years
past and some are usually new to the event, but everyone has a
great time. Plenty of healthy critters were found at both sites last
year in all shapes and sizes including juvenile mayflies, water
pennies, and stoneflies. Check out some pictures from years past
on our PHOTOS page.
|
|
|
|
|