Topic 9

• Organism is an individual living thing
• population is all organisms of a particular species living in a habitat
• Community is lots of different populations together
• ecosystem is the interaction of a community of living organisms with the non-living parts
• interdependence is when organisms in an area need each other for resources
• Habitat is where organisms normally live
• Energy is used ti grow, repair, move and excrete
• Biotic factors are living factors that effect organisms
• Abiotic factors is non-living factors that effect organisms
• Parasites are microorganisms that live in or on a host organism and causes harm
• Animal parasites : threadworms, leeches, lice, tics
• plant parasites : mistletoe, love-vine, corpse lily
• fungi parasites: ringworm, athletes foot
• Sludge worms and blood worms prove water pollution
• Freshwater shrimps and stonefly are in clean water
• blackspot fungus and Lichens show good air quality
• abiotic factors : water, wind, light, temperature
• biotic factors : disease, competition, predation
• Energy is lost so not all of it gets transferred in the food web
• fish farming involves small spaces and aims to produce more fish of the same type while reducing overfishing
• fish farming is high maintenance and reduces the biodiversity
• eutrophication is the addition of more nutrients to an ecosystem
• Fertilizers are washed into the water river/stream which causes algae bloom cycle to take place
• marine plants are killed because of lack of sunlight and decomposers using oxygen
• Water become anoxic and all aquatic organisms die
• Reforestation : the replanting of trees in areas that have been cleared
• conservation is protecting the environment by reducing the amount of resources used and waste produced
• eutrophication causes algae blooms which block sunlight from reaching other organisms