Home' Island Sun : ISN 101615 Contents ISLAND SUN - OCTOBER 16, 2015
703 Tarpon Bay Rd, Sanibel, FL (239) 472-3022
Have an insurance question?
Call our office today
for a new Auto
We are HERE
for all your insurance needs
Call our office today
for a new Auto
Email: firstname.lastname@example.org • www.gregweglarz.com
State Certified General Contractor License # CGC A05420
One Builder Serving Sanibel & Captiva for over 35 years
• Custom Residential Construction
• Remodeling Projects
• Design Team with Construction Drawings
• Plans Through Completion of Project
submitted by Shirley Jewell
Abig shout out
and thank-you to
SCCF Education Director,
for stepping in as our
guest speaker last Friday
morning, when the
scheduled speaker had to cancel. Her
topic presented some scientific facts about
the influences the moon and the sun have
on our tides.
Somewhere around third grade, most
of us learn about the moon’s gravita-
tional pull on the large bodies of water
here on Earth, causing our ocean tides
to rise and fall. That’s about the only
thing I knew before Anders explained
some other variables that factor into the
tides. She definitely had more to present
to us on the topic. Hopefully I get some
of this right, beginning with the fact that
the sun’s gravitational pull is also part of
the process but not as strong of a pull,
since the sun is 380 times farther away
from the Earth. As the Earth rotates, the
moon orbits our planet. The distance
between the Earth and moon changes
slightly during rotation and the strength
of the gravitational pull on Earth also
changes. The gravitational pull causes our
oceans to bulge out in the direction of the
moon, and on the opposite side of Earth,
another bulge occurs because the Earth
is being pulled toward the moon. The
ocean bulges create our tides. High tide
when the pull is greatest. Now add to this
land mass and breaks in large landmasses,
inlets, bays, rivers, estuaries, etc. Add
positioning of the Earth in its rotation, dis-
tance from the equator, and topography
of the landmasses, weather and currents.
Now we’re talking.
Here on Sanibel, the water masses
originate in the transition region of the
Loop Current and the Florida Current.
“The Loop Current is an ocean current
that transports warm Caribbean water
through the Yucatan Channel between
Cuba and Mexico. The current flows
northward into the Gulf of Mexico, then
loops southeastward just south of the
Florida Keys (where it is called the Florida
Current), and then just west of the west-
ernmost Bahamas. Here, the waters of
the Loop Current flow northward along
the U.S . coast and becomes the Gulf
Stream.” – www.wunderground.com
The ebb and flow of the tides in and
out play an important role in our ecosys-
tem. High tides bring nourishing sediment
and sea life into the estuaries.
“Estuaries are coastal areas where
freshwater mixes with ocean water that is
delivered by the tides. Estuaries are home
to biologically diverse and unique plant
and animal communities.” – Encyclopedia.
High tides bring in nutrients that create
food for our fish, birds and other wildlife.
Shallow water pools provide nursery areas
for fish and shellfish. Mangrove areas
thrive along our island estuaries where
many birds breed and nest.
Birds plan their feeding patterns on the
tides. Long-legged and taller birds have a
longer feeding timeframe when the water
is deeper and as the tide goes out; shorter
legged birds feed in shallower water. Tides
provide transport for organisms that begin
life protected in the shallow areas of our
estuaries and when mature use the tide to
transport them out to the sea. Seagrasses
are pollinated by water flow. Tides affect
coastal shorelines in many ways: loss
of beach sand and changing shorelines.
Seashells are distributed along our shore-
lines, so much so that Sanibel and Captiva
are called the Shell Islands, known for the
best shelling in the world.
When the sea level is rising or falling,
water is flowing to and from the ocean.
This flow causes currents called tidal cur-
rents. Tides enter San Carlos Bay through
three narrow water passageways under
the Causeway Bridge and one in Red Fish
Pass. Depending on water flow restric-
tions and wind tide, times can reach dif-
ferent locations within our area and with
as much as three hours difference. High
tides drive ocean waters to our shores and
along with wind drives currents through
our water passageways and when the tide
recedes causing low tide, it leaves sedi-
ment behind providing nutriments that our
environment and wildlife thrive on.
“Limitless and immortal, the waters
are the beginning and end of all things on
earth.” – Heinrich Zimmer, historian.
The Sanibel-Captiva Rotary Club
meets at 7 a.m. on Friday mornings at
The Community House, 2173
Periwinkle Way on Sanibel. Guests are
From page 39
the tendrils, too. It often volunteers in
yards after birds deposit the seeds. It
will grow in just about any condition.
Plant any one of these native spe-
cies and it will remind you to stop and
notice the small wonders all around us
Sources: Everglades Wildflowers by
Roger L. Hammer, A Gardener’s Guide
to Florida’s Native Plants by Rufino
Osorio, Native Florida Plants by Robert
G. Haehle and Joan Brookwell, The
Shrubs and Woody Vines of Florida by
Gil Nelson, floridata.com, fnps.org, and
Plant Smart explores the diverse
flora of South Florida.
photo courtesy of SCCF
Be part of the Million Mile Movement!
powered by Fit Nation
For more information, visit www.HealthyLee.com
The journey of a million miles begins with
a single step...
Take a step toward healthier living by joining Healthy Lee’s Million
Mile Movement! We’re challenging Lee County to get more active by
moving 1,000,000 miles in 90 days.
Whether you’re walking, running, biking or swimming, register for
this community-wide challenge for FREE at www.HealthyLee.com
and begin logging your “movement” today.
The Million Mile Movement is part of Healthy Lee’s mission
to empower and inspire the people of Lee County to make
healthy lifestyle choices through education and action.
October 1 - December 29
Links Archive ISN 100915 ISN 102315 Navigation Previous Page Next Page