PW2-RW2-U4. Deep trouble

diverse

• (adj) showing a great deal of variety; very different.
• (v) cause (animals) to mate and produce offspring.
• (adj) not likely to change or fail; firmly established.
• (n) the action or practice of catching too many fish at once, depleting the stock.

reduce

• (adj) not likely to change or fail; firmly established.
• (phrase) the continued existence of organisms that are best adapted to their environment, with the extinction of others.
• (v) make smaller or less in amount, degree, or size.
• (v) roughly calculate or judge the value, number, quantity, or extent of.

ecosystem

• (v) devote (time or effort) to a particular task or purpose.
• (n) the rearing of aquatic animals or the cultivation of aquatic plants for food.
• (n) a biological community of interacting organisms and their physical environment.
• (n) natural environment where animals live without direct human control.

restore

• (v) bring back to a former condition or position.
• (n) a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
• (adj) showing a great deal of variety; very different.
• (adj) absolutely necessary or important; essential.

estimate

• (v) gather (a crop) as a harvest.
• (v) devote (time or effort) to a particular task or purpose.
• (v) roughly calculate or judge the value, number, quantity, or extent of.
• (phrase) kept in a place such as a zoo or aquarium, not living in the wild.

species

• (v) roughly calculate or judge the value, number, quantity, or extent of.
• (n) natural environment where animals live without direct human control.
• (n) a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
• (v) devote (time or effort) to a particular task or purpose.

population

• (n) the rearing of aquatic animals or the cultivation of aquatic plants for food.
• (n) the action or practice of catching too many fish at once, depleting the stock.
• (n) all the inhabitants of a particular town, area, or country.
• (adj) not likely to change or fail; firmly established.

population

• (n) the rearing of aquatic animals or the cultivation of aquatic plants for food.
• (n) the action or practice of catching too many fish at once, depleting the stock.
• (n) all the inhabitants of a particular town, area, or country.
• (adj) not likely to change or fail; firmly established.

stable

• (adj) not likely to change or fail; firmly established.
• (adj) showing a great deal of variety; very different.
• (n) a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
• (adj) absolutely necessary or important; essential.

quantity

• (n) natural environment where animals live without direct human control.
• (v) make smaller or less in amount, degree, or size.
• (n) all the inhabitants of a particular town, area, or country.
• (n) the amount or number of a material or immaterial thing not usually estimated by spatial measurement.