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OCE Test 2 III
| Question | Answer |
|---|---|
| In primary production | There is a net gain in organic carbon |
| Bacteria that make their own carbohydrates by obtaining energy from chemical compounds and not directly from the sun are | chemosynthetic bacteria |
| Net primary productivity is | net gain in organic carbon and photosynthesis minus cellular respiration |
| The nutrients that tend to limit photosynthesis in marine environments include | nitrogen and phosphorus |
| The depth at which the cellular respiration rate equals the photosynthetic rate is referred to as the | oxygen compensation depth |
| The most abundant marine algae are members of the Division | rhodophyta |
| Diatoms, important producers in the epipelagic open ocean, are members of the Division | Chromophyta |
| Many of the organisms responsible for toxic red tides and paralytic shellfish poisoning belong to the Division | Dinophyceae |
| Important marine autotrophs that have SiO2 incoporated in the cell walls are | diatoms |
| Marine flowering plants include all of the following except | Ulva |
| Overproduction of organic matter resulting in anoxic conditions is attributed to | eutrophication |
| Harmful algal blooms | may produce toxins that affect human neurological functioning |
| Eutrophication is a type of pollution caused by increased | inorganic nutrient input |
| Annually the relative prodcutivity in the world's oceans from most productive to least productive is | temperate waters, polar waters, tropical waters |
| In temperate oceans during the winter wonths | nutrient concentrations are high, solar input is low, and water temperatures decrease |
| In temperate oceans during the summer months | nutrient concentrations are low, solar input is high, and oxygen solubility decreases |
| Although primary productivity in tropical areas is generally low, which of the following tropical locations have unusually high primary productivity rates? | Coastal upwelling zones, coral reefs, equatorial upwelling zones, mangrove swamps |
| An area of the open ocean where the rate of primary productivity is very low is referred to as a | oligotrphic area |
| Productivity in polar oceans is | light-limited |
| Productivity in tropical oceans is | nutrient-limited |
| If 10,00KCAL of energy were contained in the primary producers, on average how many KCAL of energy would you expect to be transferred to third-order consumers? | 10 KCAL |
| Nutrient flow in an ecosystem is | cyclic |
| Energy flow in an ecosystem is | unidirectional |
| The efficiency of trophic transfers in ecosystems is on average around | 10% |
| Which of the following pairs is an incorrect match between organisms and the type of symbiotic relationship they manifest? | whale barnacle: mutualism |
| The percentage of biomass regularly recycled in the euphotic zone is about | 90% |
| The percentage of euphotic zone biomass that reaches the deep ocean floor is approx | 1% |
| A symbiotic relationship in which one organism benefits and the other is unaffected is | commensalism |
| The relationship between clown fish and sea anemones is an example of | mutualism |
| The maximum sustainable yield is best defined as | largest catch that can be taken without overfishing |
| The area of the ocean that produces the largest standing stock of commercial fish is in the | continental shelves |
| The term bycatch refers to | non target species that are caught along with commercial species |
| Catches above the maximum sustainable yield | result in overfishing |
| Purse seines are nets that | surround and trap fishes |
| The mass present at a given time of a population of fish is called its | standing stock |
Created by:
nmr09c