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Aquatic Invertebrate as Indicator for Water Quality
- 1. Presentation by : Syaza Hani binti Jamaludin (P76797) STAL 6043 Management and Conservation of Marine Resource
- 2. Marine communities that are affected by pollution Species richness decrease while the abundance of tolerant species increase Result : changes in invertebrate community structure, diversity & abundance Aquatic Invertebrates as Water Quality Indicators
- 3. Aquatic invertebrates have varying degrees of ability to withstand pollution & so it can be indicators of water quality & habitat condition Advantage : Invertebrates incorporate & embody pollution effects that occur over time in both local & wider areas Aquatic Invertebrates as Water Quality Indicators
- 4. Any biological species that defines a trait or characteristic of the environment Indicator species can be among sensitive, intermediate or tolerant species in a region Aquatic Invertebrates as Water Quality Indicators
- 5. • A detritus feeder removing organic material from the substrate • Usually found in sandy areas but some species can live on bio-film on rocks Sea cucumber Aquatic Invertebrates as Water Quality Indicators
- 6. • A voracious predator of coral that has few natural predators • If unchecked, COT can cause massive destruction of coral reefs in a relatively short space of time Crown of thorn (COT) sea star Aquatic Invertebrates as Water Quality Indicators
- 7. • An active predator & feed on other molluscs and sea star • Protect coral reefs by keeping down the numbers of COT sea star • Their shells are often collected in some areas caused massive damage to coral on the reef Triton trumpet Aquatic Invertebrates as Water Quality Indicators
- 8. • Filter sea water to extract plankton for food • They are sensitive to water quality & therefore a good indication of water quality Giant clam Aquatic Invertebrates as Water Quality Indicators
- 9. • It consume periphyton which is a mixture of algae & other nutrients • Periphyton is an important indicator of water quality because it is extremely sensitive to ambient nutrient concentrationSea urchin Aquatic Invertebrates as Water Quality Indicators
- 10. • They are exceedingly important to the coral reef ecosystem • As filter feeders they do not do well in water with fluctuating salinity and therefore are an absolute indicator water quality Aquatic Invertebrates as Water Quality Indicators Sea squirt
- 11. • Overpopulations : lead to dramatic loss in living coral tissue, reduced reef resilience and recovery, from diseases • A stable ecosystem : their numbers reduced as larvae when eaten by reef fish Aquatic Invertebrates as Water Quality Indicators Drupella snail
- 12. 1. Measuring the size range (smallest to largest of organisms in each sorted group & record on the data sheet) Aquatic Invertebrates as Water Quality Indicators
- 13. 2. Total density sum & number of groups mild pollution : increase the abundance of a few tolerant organisms Severe pollution : lower overall density & diversity Aquatic Invertebrates as Water Quality Indicators
- 14. 3. Other possible comparison : Compare to reference site(s) selected to represent relatively undisturbed conditions Compare to the best conditions found in the area Trends at the subject sample site over time Aquatic Invertebrates as Water Quality Indicators
- 15. THANK YOU !!!
Hinweis der Redaktion
- Indicator sp can be plant and animal, vertebrates and invertebrates.
- Unfortunately their shells are often over collected in some areas. It was the over collection of these in the Great Barrier Reef that caused the Crown of Thorn population to grow to epidemic proportions. This in turn caused massive damage to coral on the reef.
- A high or low population of urchins indicate water quality without expensive testing.
- They are divided into colonial or solitary species. Colonial species are inflated with water and the siphon action filters water for nutrients. Reportedly, a 3cm sea squirt siphon 4-5 quartz of water an hour.
- Drupella snails are a small gastropod found throughout the indo-pacific ocean which feed on living coral tissue (coralivore).
- . Pollution can eliminate larger invertebrates / produce small body sizes in a species that would otherwise be larger in unpolluted condition