Hydrothermal vents are typically found along cracks in the ocean floor. These vents support a diverse range of organisms, from chemosynthetic bacteria to four- meter-long tube worms. The bacteria use hydrogen sulfide generated from the vents to create organic molecules. The microorganisms form the base of the
hydrothermal vent food chain. Which factor plays a key role in the success of the hydrothermal vent community?
chemical
ЕОООО
salinity
light
pressure

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.