As I could post more photos than you'd want to see of the salt marsh in my blog, I thought I might try to educate you about how special this environment is. This is a book I recently read and enjoyed. I always try to learn more about where I live. Now, to read something about allergies in the fall as my head is spinning...
Charles Seabrook, The
World of the Salt Marsh: Appreciating and Protecting the Tidal Marshes of the
Southeastern Atlantic Coast (Athens: University of Georgia Press, 2013),
397 pages including an index and notes
The
salt marsh is an amazing landscape that is often overlooked or taken for
granted. Per square foot, it is one of
the most productive areas on our planet and serves many functions: protecting
the inland areas from storms, providing recycling and cleansing services to the
water, and serving as a nursery for the oceans.
And everything must work together.
When the balance is lost, the marsh suffers and in the long term we
suffer.
I picked
up this book in an attempt to learn more about my new home.
Although I grew up near the marsh in North Carolina, I never really studied
it. Seabrook, a science reporter with the Atlanta Journal-Constitution,
is a native of Saint John's Island in South Carolina (one of the historic
African-American island communities--the Gullah-Geechee culture--that is found
in the islands along the Southeast Coast). In these pages, he does a
wonderful job of sharing the history and culture of those who live along the
marsh; informing us of the animals that depend on this terrain; explaining the
science, geology and hydrology that makes the marsh work, and presenting the
problems facing the salt marsh. Seabrook’s
area of study is the South Atlantic Blight (the shoreline from Cape Hatteras to
Cape Canaveral).
Seabrook explains the complexity of
the marsh. Twice a day, tides move in
and out, flushing the marsh with water and sea life only to withdraw it six
hours later in which marsh gives some of its riches back to the ocean. This cycle helps both marsh and the ocean,
but it is more complicated because fresh water is continually introduced from
the land. All of this, mixed in with
grass and snails, oysters and crabs, fish and animals, works together to efficiently
produce biomass and to cleanse out harmful elements that might destroy the
marsh or the oceans.
Seabrook shows, through examples,
how little changes can cause major problems. The building of a tidal gate in Savannah, designed to help keep the
shipping channels deeper, increased the salinity in the Savannah wetlands which
had been a fresh water preserve. The aftermath
was dead cypress and the end of wonderful stripe bass fishing as neither the
tree nor fish could take to the increase salinity. Other developments, such as
the Diamond Causeway (which I drive over several times a week), reduced the salinity
in the upper marsh and had an adverse impact on oysters and crabs which was one
of the reasons for the closing of a packing factory in Pinpoint. Another problem is the development along the estuaries
that feed into the marsh. As trees and
natural vegetation is replaced with concrete, asphalt, houses, along with the draining
that is needed for golf courses and parking lots, the amount of fresh water (often
tainted from oils) going into the marsh causes adversity for salt water
species, especially the important grass in salt water marshes. Contaminates such as mercury are even more
harmful as he shows in an example of a polluter in the Brunswick, Georgia. When the plant was finally shut down, the
owners and managers all received prison sentences for their role in flushing
large amounts of mercury into the river that has affect the animal life not
only around Brunswick but up and down the coastline.
Much of what Seabrook writes about
is loss. Turtles that die in nets,
shrimping that is having a harder time competing with factory farms in other
parts of the world, native cultures (or at least native for the last 400 years)
who are being forced out by developments.
But he also speaks of hope.
There have been odd groups that have come together to protect the marsh
and as we learn how valuable the marsh is, more people see the importance of
protecting it. I hope people read this
book and realize what a valuable asset the marsh is and truly appreciate it as
more than just a beautiful place from which to observe the rising or the
setting of the sun.
One range of numbers that Seabrook
mentions several places and which has me pondering my impact of living in this
area is 10-15%. It appears that when
hard surfaces covers more than 10-15% of the land feeding the estuaries that
feed the marsh, damage occurs to the saline balance (as well as an increase in
pollutants). With the increase in
development and the sprawl that is occurring all over the country, but
especially in the Southeast, in many places we have surpassed the threshold and
need to be very careful less the marsh disappears and we become more exposed
and lose an important source of food. Another fact that stuck with me is how special
this area is, in the center of the Atlantic Blight, with some of the highest
tides in the world. Tides here average
nearly nine feet which are a lot more than what I was used to where I grew up a
couple hundred miles north.
Yes, I recommend this book! However, I will note for my readers who are
in the Carolinas or Florida, that Seabrook primarily focuses on the marsh in
Georgia and the southern half of the South Carolina coast (south of
Charleston). I would have liked to have
learned more about the issues going on further north (there is the issue of
deepening the Cape Fear River) and in Florida (where development had a head start over the areas concentrated on within this book).








