Sperm whales were often killed by whalers directly along the equator in the Paci

Question

Sperm whales were often killed by whalers directly along the equator in the Pacific Name: Page 2 of 7 because a. The water temperature is warmer at the equator and sperm whales prefer warmer temperatures b. Warm water along the equator produces higher phytoplankton growth c. The equatorial divergence and upwelling produces a higher nutrient flux, higher d. e. The primary production, and higher zooplankton, fish & squid abundances Sverdrup's critical depth concept predicts higher productivity along the equator equator is a zone of water mass convergence, concentrating plankton and whales there. Why are fisheries yields so high-50% of global fish production-in upwelling regions? a. Fish attain larger individual biomass b. The number of trophic links between phytoplankton and fish is larger in upwelling c. Phytoplankton biomass is dominated by fast-growing picoplankton d. All of the above e. None of the above Ampeliscid amphipods a. Are early opportunistic species in the succession after recovery from a shallow- water pollution event. b. Produce tubes that penetrate to over 10 cm's in the sediments c. Oxygenate and detoxify polluted sediments d. Don't compete well with later succession benthie species e. All of the above High deep-sea benthic diversity a. Can be described by rarefaction curves b. Was first described in a transect from Gay Head MA on Martha's Vineyard to c. d. e. Bermuda Was first explained by Howard Sanders with his stability-time hypothesis All of the above None of the above Hydrothermal vent communities a. Are fueled by chemosynthetic bacteria utilizing hydrogen sulfide for energy b. Contain large gutless organisms such as bivalve molluscs and vestimentiferan worms c. d. e. Are found at tectonic spreading centers All of the above None of the above

Explanation / Answer

ANSWER-

1 .e) the equator is a zone of water mass convergence ,concentrating planktons and whales there.

2. d) all of the above .

the increased availability of nutrients in upwelling regions results in high levels of primary production and thus fishery production .

3. e) all of the above.

they are described from the shallow shelf waters of N.Bering and Southern chukchi seas.

4. d) all of the above.

antarctica benthic deep sea biodiversity includes all of the given reasons

5. d) all of the above .

it is found near spreading centers such as mid oceanic rdge and supports a large population of chemoautotrophic bacteria .

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