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level: Ecosystems

Questions and Answers List

level questions: Ecosystems

QuestionAnswer
what is biodiversitythe range of species within an ecosystem
what is a speciesa group of organisms which can interbreed and produce fertile offspring
what is meant by a populationthe total number of living organisms of one species living in a habitat
what is a habitatthe place where an organism lives eg. soil, water, trees
what is a communityall the organisms (plants, animals and micro-organisms) that live in a particular area
what is an ecosystemall the organisms (the community) living in a particular habitat and the non-living components with which the organisms interact community + habitat
what is a nichethe role an organism plays in the community
what is a produceran organism that can produce its own food (by photosynthesis)
what is a predatoran animal that hunts and eats other animals
what is a consumeran animal which eats other organisms
what is a herbivorean animal which only eats plants
what is a carnivorean animal which only eats animals
what is preyan animal that is hunted and eaten by other animals
what is a decomposeran organism which feeds on dead organisms
what is an omnivorean animal which eats plants and animals
what is a food chaina diagram which shows a simple feeding relationship between organisms
what does a niche relate tothe resources an organism requires in its ecosystem, such as light and nutrient availability and its interactions with other organisms in the community. It involves competition and predation and the conditions it can tolerate, for instance, temperature
what do the arrows in a foodweb representthe flow of energy from one organism to another
what activities can disrupt a foodweb?human activities such as hunting, fishing or using chemicals that cause pollution
what is this an example of?a food web
when does competition in ecosystems occur?when resources such as light (for plants), food, water, mates are in short supply
what are the two forms of competitionintraspecific interspecific
describe intra specific competitionoccurs amongst individuals of the same species and is for all resources required. intra specific competition is more intense than interspecific competition
describe interspecific competitionoccurs amongst individuals of different species for one or a few of the resources they require. interspecific competition is less intense than interspecific competition as different species mightn't need the exact same resources
what is the only way different species of animal can exist together without competitionas long as their requirements of each species is different