“plankton”的概念、定义、翻译、参考文献-科学参考

plankton

Biology

The collection of pelagic organisms that drift or float passively with the current in a sea or lake. Plankton includes many microscopic organisms, such as algae, protists, various animal larvae, and some worms, but also larger forms that are unable to swim effectively, such as jellyfish, krill, and copepods. Plankton forms an important food source for many other members of the aquatic community and is divided into zooplankton and phytoplankton. Compare benthos; nekton; neuston.

Geology and Earth Sciences

Minute aquatic organisms that drift with water movements, generally having no locomotive organs. The phytoplankton (plants) comprise mainly diatoms, which carry out photosynthesis and form the basis of the aquatic food-chains. The zooplankton (animals) which feed on the diatoms may sometimes show weak locomotory powers. They include protozoans, small crustaceans (Crustacea), and in early summer the larval stages of many larger organisms. Plankton are sometimes divided into net-plankton (more than 25 μ‎m diameter) and nanoplankton, which are too small to be caught in a plankton net (see nano-; nanofossil).

Geography

Minute organisms which drift with the currents in seas and lakes. Plankton algae, various animal larvae, and some worms; the animals are zooplankton and the plants are phytoplankton. See W. Lampert and U. Sommer (1997) for a discussion of the ‘top-down’ versus ‘bottom-up’ plankton controversy.

单词	plankton
释义	plankton Biology The collection of pelagic organisms that drift or float passively with the current in a sea or lake. Plankton includes many microscopic organisms, such as algae, protists, various animal larvae, and some worms, but also larger forms that are unable to swim effectively, such as jellyfish, krill, and copepods. Plankton forms an important food source for many other members of the aquatic community and is divided into zooplankton and phytoplankton. Compare benthos; nekton; neuston. Geology and Earth Sciences Minute aquatic organisms that drift with water movements, generally having no locomotive organs. The phytoplankton (plants) comprise mainly diatoms, which carry out photosynthesis and form the basis of the aquatic food-chains. The zooplankton (animals) which feed on the diatoms may sometimes show weak locomotory powers. They include protozoans, small crustaceans (Crustacea), and in early summer the larval stages of many larger organisms. Plankton are sometimes divided into net-plankton (more than 25 μ‎m diameter) and nanoplankton, which are too small to be caught in a plankton net (see nano-; nanofossil). Geography Minute organisms which drift with the currents in seas and lakes. Plankton algae, various animal larvae, and some worms; the animals are zooplankton and the plants are phytoplankton. See W. Lampert and U. Sommer (1997) for a discussion of the ‘top-down’ versus ‘bottom-up’ plankton controversy.
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