EOSC 270 Assignment 2 - EOSC 270 Assignment 2 Andrea Smid...

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EOSC 270 Andrea Smid Assignment 2 68603042 April 2 nd , 2009 1a) Amount of organic C transported to the deep ocean as a result of the whale fall described: 60 tons x 0.05 x 1000kg = 3000kg of organic C (or 3 tons of organic C) 1 (metric) ton b) Number of years it will take for the C exported from this epipelagic ecosystem to provide the same amount of organic C as that exported as a result of the whale fall: 200g x 1 = 66.67g m 2 · y 3 m 2 · y 3000kg x 1000g x 1 = 40000g 1kg 75m 2 m 2 40000g x m 2 · y = 600 years m 2 66.67g 2a) Humpback whales reside along the coasts of all world oceans and occasionally swim close to shore, even into rivers and harbors(2). They migrate between summer polar feeding grounds and winter subtropical or tropical breeding grounds(2). Gray whales also have coastal migration routes along the Western coast of North America – between Mexico’s Baja calving lagoons in the winter and the cold arctic seas in the summer(1, 4). Many female whales and newborns die during the annual migration due to the stress associated with birth(3). Therefore, whale carcasses tend to accumulate along these migratory paths, although they can fall at random locations and can be spaced very far apart, making them difficult to locate(3). Figure 1 shows the location of six known whale falls, all of which are along the seasonal migratory routes of whales in the global ocean as can be inferred by comparing Figure 1 with Figure 2.
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Figure 1 Legend : Whale symbols = whale falls; black dots = cold seeps. Figure 2 : Seasonal Migratory Routes of Whales in the Global Ocean(2):
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2b) Along with whale falls, which are located along the seasonal migratory routes of whales in the global ocean (refer to Figure 1 & 2), cold seeps also appear to be located
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This note was uploaded on 05/09/2009 for the course EOSC 270 taught by Professor Pakomov/maldonado during the Spring '09 term at The University of British Columbia.

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EOSC 270 Assignment 2 - EOSC 270 Assignment 2 Andrea Smid...

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