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THE WEIRS TIMES, Thursday, July 22, 2010 ENJOYTHEWATER Get the most out of NH’s Lakes! LAKES from 33


it to capture its prey. Bladderwort is the only carnivorous plant with a


true “trap-door” to seize its prey. In fact, some sci- entists believe that this plant has one of nature’s


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most rapid and precise traps. It has trigger hairs on each bladder resem- bling the antennae of a tiny crustacean or insect. When trigged by a micro- scopic organism floating by, these hairs open the trap-door which sucks in water along with the or- ganism. The trapping pro- cess takes approximately 15 to 20 milliseconds, just fractions of a second. Once inside the bladders, the victim dies and is digested by enzymes and acids in the plant. Cells within the plant then distribute the nutrients from the digest- ed material to the stem,


Underwater view of the slender branchlets of a bladderwort plant bearing tiny, pear-shaped bladders. Note the bristly hairs at the entrance to the bladder traps. One bladder trap has been enlarged to show a trapped organism, a minute crustacean related to shrimp and crayfish. Photo source: waynesword.palomar.edu/carnivor.htm.


a process that allow the plant to grow.


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WAKEBOARDS SKATEBOARDS CLOTHING Bladderwort is often


mistaken for an exotic aquatic plant. Due to its finely divided


leaves, people often con- fuse bladderwort with the exotic aquatic plant vari- able milfoil which is devas- tating some of New Hamp- shire’s lakes. More often than not, when an upset lake enthusiast frantically reports to me that they have discovered exotic milfoil in their lake, after asking a few simple ques- tions, I am usually pleased (and relieved) to assure them that what they really found was bladderwort.


If you find a suspicious


plant in your lake, here’s what you can do to de- termine if it is bladder- wort. Look for small circular


air sacs (“bladders”) that are green, brown, or clear in color coming off the leaves and that can be squished when squeezed (listen carefully and you might hear a “popping” noise). If the plant has this unique feature, then it is definitely bladderwort and not an exotic look-alike plant. However, if you still aren’t convinced that the specimen isn’t milfoil or See LAKES on 35


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