Type of fouling organism: Green algae
Algae include several groups of relatively simple, eukaryotic, living aquatic organisms that capture light energy with different pigments and use it through photosynthesis to convert inorganic substances into organic matter. Algae vary from small, single-celled species to complex multicellular species, such as seaweeds. Seaweeds live in the sea or in brackish water occupying both the inter and sub-tidal. The algae can be distinguished by the different pigments into three basic colours: red, green and brown. Green algae attribute their colour to the presence of the pigments chlorophyll a and b. Most species are aquatic and can be found in freshwater and marine environments. Some 8,000 species have been described with over 800 marine species. Green algae may be unicellular, multicellular, colonial or composed of one large nucleate/multinucleate cell.
Ulva intestinalis is a green seaweed found at all levels of the shore. It has inflated, irregularly constricted, tubular, generally unbranched fronds that grow out from a small base. The fronds may be 100 - 300 mm in length and have a diameter of 6 - 18 mm. The plant is a summer annual and decays to become a bleached and decaying mass towards the end of the summer season.
Environment and Habitat
- Photosynthetic nutrition occurring on all levels of the shore and is a common epiphyte on shells and other algae.
- Reproductive type: Alternation of generations.
- Found on other biofouling organisms.
Effects and Impacts
- Problematic for stock species as can compete for space and resources.
Control/ Strategies and Management
Principles of Management
C Combat Settlement
- Considered to be worldwide in it's distribution.
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