Discussion
Which one of the following is a lotic ecosystem ?
Answer: D
The lotic ecosystem is the river.
Freshwater ecosystems are divided into lotic (from Latin lotus, washing), with flowing water, and lentic, with standing water. Rivers and streams are lotic: unidirectional current, high oxygen and organisms adapted to cling or swim against the flow.
Lakes, ponds and pools are all lentic, still-water systems, with layering by temperature and light, and plankton-based food webs.
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