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Caulerpa Taxifola

Case study for Environmental Ethics

William Cuthbertson

on 12 December 2012

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Transcript of Caulerpa Taxifola

Caulerpa Taxifolia: Background Features Features Positive Environmental effects Removal Negative Environmental effects Ethics Native to Indian ocean
One strain was modified for use in the aquarium is the early 80's
Federal Noxious weed list
Accidentally released into Mediterranean sea in Monaco Asexual reproduction
fragments as small as 1cm can germinate into a new plant
extremely hardy temperature tolerance and can grow in low light
Dense and fast growth pattern
Produces toxic compounds inedible to native species Genetically flexible
Grows on a variety of surfaces on the sea bed
Can grow in nutrient poor areas Chokes out native species of seaweed
Toxicity of plant makes it inedible to local herbivores
Poisons sediments
Fish that have eaten C. Taxifolia are inedible to humans
Removal using chlorine tarps is costly and also damaging to the environment High tolerance to chemicals allows it to clean up the water in local ports and sewage outlets
Tends to grow in areas that arent already occupied by another seaweed
may in fact increase biodiversity in some areas Although eradicated in 2007 of the coast of San Diego, removal cost upwards 7 million and severely impacted local ecosystem
A large tarp was placed over the C. Taxifolia bed, and massive quantities of chlorine were poured underneath
Researchers have proposed introducing a species of slug to slowly chew away at the C. Taxifolia Katz: Restoration of Nature
Hardin: Tragedy of the Commons
Gambrel & Cafaro: Virtue of Simplicity Source: University of Florida, IFAS source: http://sourcefrayer.free.fr/tpe-taxifolia/gallerie_d'images.html References William Cuthbertson Envs 3140 Killer Alga Source: Pierre Madl & Maricela Yip (2004) Source: Pierre Madl & Maricela Yip (2004) Burfeind, Dana D., Ian R. Tibbetts, and James W. Udy. "Habitat preference of three common fishes for seagrass, Caulerpa taxifolia, and unvegetated substrate in Moreton Bay, Australia." Environmental biology of fishes 84.3 (2009): 317-322.
Cevik, Cem, et al. "Macrobenthic assemblages of newly introduced Caulerpa taxifolia from the Eastern Mediterranean coast of Turkey." Biological Invasions 14.3 (2012): 499-501.
Davis, Andrew R., A. M. Ferguson, and J. T. Wright. "Structural complexity facilitates accumulation and retention of fragments of the invasive alga,< i> Caulerpa taxifolia</i>." Journal of Experimental Marine Biology and Ecology371.2 (2009): 163-169.
Eyre, Bradley D., et al. "Differences in benthic metabolism, nutrient fluxes, and denitrification in Caulerpa taxifolia communities compared to uninvaded bare sediment and seagrass (Zostera capricorni) habitats." Limnology and Oceanography 56.5 (2011): 1737.
Glasby, T. M. Caulerpa taxifolia in seagrass meadows: killer or opportunistic weed?. Biological Invasions, 1-19. e, Mark. "Killer Alga: Caulerpa Taxifola." University of California Riverside, n.d. Web. 11 Dec. 2012.Jousson, O., et al. "Molecular evidence for the aquarium origin of the green alga Caulerpa taxifolia introduced to the Mediterranean Sea." Marine Ecology Progress Series 172.0 (1998): 275-280.Meinesz, Alexandre, et al. "The introduced green alga Caulerpa taxifolia continues to spread in the Mediterranean." Biological Invasions 3.2 (2001): 201-210.Meinesz, A., et al. "Spread of the introduced tropical green alga Caulerpa taxifolia in northern Mediterranean waters." Journal of Applied Phycology 5.2 (1993): 141-147.Meusnier, I., et al. "Polymerase chain reaction–single strand conformation polymorphism analyses of nuclear and chloroplast DNA provide evidence for recombination, multiple introductions and nascent speciation in the Caulerpa taxifolia complex." Molecular Ecology 11.11 (2008): 2317-2325.Madl, P. & Yip, M. "Literature Review of Caulerpa taxifolia". BUFUS-Info (2004) 19 (31).Ramey, Victor. "Green Alga | Center for Aquatic and Invasive Plants." Green Alga | Center for Aquatic and Invasive Plants. University of Florida, 2001. Web. 11 Dec. 2012.
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