Difference between revisions of "Pollution and algae"
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<u>'''Heavy metals'''</u> | <u>'''Heavy metals'''</u> | ||
| − | Heavy metals are known to be able to depress algal growth when they are present above a certain threshold level. | + | Heavy metals are known to be able to depress algal growth when they are present above a certain threshold level. They also destabilize the cel membrane of algae, this causes the algae change their shape, or inhibits the celdivision, causing the algae to grow. <ref>Md. Shahidul Islam and Masaru Tanaka, 2004, Impacts of pollution on coastal and marine ecosystems including coastal and marine fisheries and approach for management: a review and synthesis, Marine Pollution Bulletin Volume 48, 7-8 Pages 624-649.</ref> |
<u>'''Organochlorine compounds'''</u> | <u>'''Organochlorine compounds'''</u> | ||
| + | |||
| + | DDT inhibits photosynthesis and growth | ||
| + | DDT accumulates in algae, it adsorbs to the lipids of the algae, enriching the algae concentration towards the environmental. However, there seems to be a wide range in the tolerance of algae towards these compounds. Therefore the compounds might be a threat to the algae biodiversity and seasonal cycles of algae. | ||
| + | <ref>https://kb.osu.edu/dspace/bitstream/1811/5666/1/V72N01_006.pdf</ref> | ||
| + | |||
== Case studies == | == Case studies == | ||
Revision as of 15:45, 20 July 2009
Algae contain higher concentrations of metals than the surrounding water. [1]
Heavy metals
Heavy metals are known to be able to depress algal growth when they are present above a certain threshold level. They also destabilize the cel membrane of algae, this causes the algae change their shape, or inhibits the celdivision, causing the algae to grow. [2]
Organochlorine compounds
DDT inhibits photosynthesis and growth DDT accumulates in algae, it adsorbs to the lipids of the algae, enriching the algae concentration towards the environmental. However, there seems to be a wide range in the tolerance of algae towards these compounds. Therefore the compounds might be a threat to the algae biodiversity and seasonal cycles of algae. [3]
Case studies
Case study 1:PCBs and organochlorine pesticides in Antarctic algae[4]
References
- ↑ Elliot, M.; Hemingway, K. (2002). Fishes in estuaries. Blackwell Science: London, UK. 636 pp.
- ↑ Md. Shahidul Islam and Masaru Tanaka, 2004, Impacts of pollution on coastal and marine ecosystems including coastal and marine fisheries and approach for management: a review and synthesis, Marine Pollution Bulletin Volume 48, 7-8 Pages 624-649.
- ↑ https://kb.osu.edu/dspace/bitstream/1811/5666/1/V72N01_006.pdf
- ↑ Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377
