Biodiversity increases the consumptive value of land, meaning that

ecosystems with low biodiversity consume resources at a higher rate than those with higher biodiversity.
land with lower biodiversity has many more possible uses for humans than land with higher biodiversity.
land that has been cleared for agriculture consumes natural resources at a slower rate and is cheaper to maintain.
ecosystems with higher biodiversity consume more resources than those with lower biodiversity, creating more strain on the environment.
more value can be derived from the more diverse products produced by ecosystems with high biodiversity relative to land that has been cleared for agriculture.

Hunting in the darksome fish rely on senses beyond sight. in the darkness of the marianas trench, a fish called the rattail has an extremely sensitive sense of smell. the fish uses scent, rather than sight, to steer toward food. once it's near food, the rattail uses a special organ on the bottom of its chin to guide itself by feel.marine snowone staple of the deep sea diet is "marine snow," flakes of organic, edible substances that sink down from the upper ocean. animals at the ocean's bottom find sustenance in everything from the bodies of dead creatures to fecal matter. marine snow is diverse enough to support numerous species. for instance, several species of snails and worms feed exclusively on deceased whales.microorganismsthe deep sea is an intricate ecosystem, and even the ocean floor itself plays a part. hydrothermal vents are cracks in the sea floor where erupting magma mixes with ocean water to produce plumes of hot, sulfur-rich chemicals. some microbes can use these chemicals for energy, sustaining their existence and that of the animals who depend on their roles in the deep sea food chain.