Biology Marine Biology & Aquatic Ecosystems Flashcards

Hydrothermal vent communities obtain their energy primarily through:

Answer: Chemosynthesis by bacteria oxidizing hydrogen sulfide

Chemoautotrophic bacteria at hydrothermal vents oxidize hydrogen sulfide to fix carbon, supporting unique deep-sea communities without sunlight.

Which adaptation allows deep-sea fish to withstand extreme pressure?

Answer: High concentrations of trimethylamine oxide (TMAO) stabilizing proteins

TMAO is a piezolyte that counteracts pressure-induced protein denaturation and is found in high concentrations in deep-sea organisms.

The term 'benthic zone' refers to the:

Answer: Bottom sediment and floor of aquatic ecosystems

The benthic zone is the ecological region at the lowest level of a body of water, including the sediment surface and sub-surface layers.

Which process drives major ocean surface currents?

Answer: Wind patterns interacting with the Coriolis effect

Surface ocean currents are primarily driven by global wind patterns, deflected by the Coriolis effect due to Earth's rotation.

Bioluminescence in marine organisms is most commonly used for:

Answer: Predator attraction, prey luring, and communication

Marine bioluminescence serves multiple functions including attracting prey (anglerfish), startling predators, and intraspecific communication.

Upwelling zones along continental coasts are among the world's most productive fisheries because upwelling brings:

Answer: Nutrient-rich cold water from the deep ocean to the surface

Coastal upwelling transports cold, nutrient-rich deep water to the surface, fueling phytoplankton blooms that support abundant marine life.