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Dr. Marguerite Koch-Rose and Her Commitment to a Dying Breed<br />

SAVING SEAGR ASS<br />

Home to an estimated 2.7 million acres of seagr<strong>as</strong>s meadows,<br />

<strong>Florida</strong>’s co<strong>as</strong>tal waters face a harsh reality — the flowering<br />

underwater vegetation is becoming stressed which is<br />

leading to frequent large-scale die-off events. These m<strong>as</strong>s<br />

mortality events in co<strong>as</strong>tal seagr<strong>as</strong>s communities are a global<br />

phenomenon occurring in <strong>Florida</strong> Bay <strong>as</strong> well <strong>as</strong> the Mediterranean<br />

Sea. Leading the charge to understand the factors driving<br />

seagr<strong>as</strong>ses to die-off is Dr. Marguerite Koch-Rose, <strong>as</strong>sociate<br />

professor in the Department of Biological Sciences at<br />

<strong>FAU</strong>’s Charles E. Schmidt College of Science. She h<strong>as</strong> dedicated<br />

much of her professional career to studying seagr<strong>as</strong>s and<br />

other marine habitat-forming ecosystems such <strong>as</strong> mangrove<br />

swamps and salt marshes. Like an unrelenting detective in<br />

search of a c<strong>as</strong>e-breaking clue, Koch is racing against time<br />

to determine exactly what h<strong>as</strong> been threatening the existence<br />

of the seagr<strong>as</strong>s community in <strong>Florida</strong> Bay since the problem<br />

w<strong>as</strong> first recognized in the early 1990s.<br />

While unsuited to grow on land, <strong>Florida</strong> seagr<strong>as</strong>ses thrive in<br />

co<strong>as</strong>tal bays, lagoons and around coral reefs incre<strong>as</strong>ing the biocomplexity<br />

of these ecosystems. Seagr<strong>as</strong>s beds, with their<br />

biodiverse residents of marine species, are the aquatic version<br />

of tropical rainforests in terms of their productivity. In<br />

addition to high productivity, seagr<strong>as</strong>ses stabilize bottom sediments,<br />

process unwanted nutrients and create a nursery<br />

ground for juvenile fish and shellfish. One acre of seagr<strong>as</strong>s<br />

can be the habitat and feeding source for more than 40,000<br />

fish and 50 million small invertebrates. Without seagr<strong>as</strong>s,<br />

<strong>Florida</strong>’s water clarity will be compromised, an important<br />

food supply for fish and marine mammals diminished and<br />

fish, crustaceans and shellfish will have no place to live,<br />

breed and reproduce. Loss of <strong>this</strong> habitat would have serious<br />

economical impacts on co<strong>as</strong>tal fisheries and tourism.<br />

In an effort to pinpoint what is challenging the seagr<strong>as</strong>s<br />

community, Koch and her colleagues have isolated and cultured<br />

seagr<strong>as</strong>s plants in 500-liter tanks located at the Gumbo Limbo<br />

Environmental Complex in Boca Raton. These tanks allow Koch<br />

to conduct experiments on seagr<strong>as</strong>s and its tolerance to multiple<br />

stressors including the interaction between salinity and<br />

high water temperatures. Her experiments at Gumbo Limbo<br />

and in the field indicate that the die-off conditions that so<br />

seriously threaten seagr<strong>as</strong>s are linked to low oxygen levels.<br />

Koch earned her Ph.D. at the Rosenstiel School of Marine<br />

and Atmospheric Science (RSMAS) at the University of Miami.<br />

At <strong>FAU</strong>, she teaches marine botany, co<strong>as</strong>tal ecology and scientific<br />

communications. Her research h<strong>as</strong> garnered much<br />

interest and support from the state of <strong>Florida</strong> and h<strong>as</strong> earned<br />

<strong>FAU</strong> a reputation <strong>as</strong> a great place to study marine ecology.<br />

Without seagr<strong>as</strong>s,<br />

<strong>Florida</strong>’s water clarity will be<br />

compromised, an important<br />

food supply for fish and marine<br />

mammals diminished and<br />

fish, crustaceans and shellfish<br />

will have no place to live,<br />

breed and reproduce.<br />

ABOVE: Dr. Koch-Rose conducting an<br />

experiment at Gumbo Limbo in Boca Raton<br />

legacy 5<br />

PHOTO BY WENDI SCHNEIDER

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