Branched Green Algae
Cladophora spp.
Branched green algae, typically from the genus Cladophora, consist of multicellular, branched filaments that are firmly attached to substrates such as stones or wood. They occur in both standing and flowing waters and can form long, whip-like structures under high nutrient conditions. The cell walls are often rough, distinguishing them from other slimy algae. In cases of mass development, they can overgrow entire sections of a water body.
Details
Oxygen production
High during the photophase due to intensive photosynthesis.
Habitat function
Substrate for periphyton and spawning ground for some fish species.
Nutrient uptake
Very efficient uptake of dissolved phosphate and nitrate.
Food source for
Invertebrates (e.g., gammarids), herbivorous fish, and waterfowl.
Human use
Partially used as fertilizer or in biomass production, though often regarded as a nuisance 'weed' in ponds.
Ecology
Ecological role
Primary producer; provides habitat and hiding places for microorganisms and fish fry.
Natural predators
Aquatic snails, herbivorous fish (e.g., Rudd), various crustaceans.
Competitor species
Other filamentous green algae (e.g., Spirogyra) and higher aquatic plants competing for light and nutrients.
Ecosystem service
Oxygen production and nutrient sequestration within its tissues.
Threats
Herbicide use, extreme acidification of the water.
Scientific profile
Profile
Reproduction
Isomorphic alternation of generations (diplohaplontic); asexual reproduction via quadriflagellate zoospores or fragmentation; sexual reproduction via biflagellate isogametes.
Protection & threats
Status not on standard scale
Main threats
Herbicide runoff from agriculture, extreme acidification of water bodies, and mechanical removal in tourist-heavy coastal or shore areas.