Story: Marine conservation

Underwater sediment build-up

Underwater sediment build-up

Too much sediment disrupts coastal marine life in two main ways. First it coats them with fine particles of silt, making it difficult for them to extract oxygen from the sea water. Second, it blocks the depth to which sunlight penetrates, so that seaweeds cannot photosynthesise. If sunlight is blocked for long enough, seaweeds die, and so do many other creatures that live in and around them

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How to cite this page:

Gerard Hutching and Carl Walrond, 'Marine conservation - Pollution', Te Ara - the Encyclopedia of New Zealand, (accessed 16 May 2022)

Story by Gerard Hutching and Carl Walrond, published 12 Jun 2006, updated 1 Sep 2015