food webs
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what is a food web?
a pictorial representation of a predating relationship among organisms in an ecosystem
what is a food chain?
a step by step sequence linking organisms that feed each other
what does a food chain always start with?
a plant
what is a plant also known as?
producer
what is a herbivore also known as?
primary consumer
what is a carnivore also known as?
secondary consumer
what is a top carnivore also known as?
tertiary consumer
who is trophic level 1?
plant
who is trophic level 2?
herbivore
who is trophic level 3?
carnivore
who is trophic level 4?
top carnivore
what is a scavenger?
carnivores that eat the remains of dead animals
what is an omnivore?
consumer that eats both plant and animal
what is a decomposer?
break down organic matter and waste into its components
what is an ecosystem?
a system formed by the interaction of a group of organisms with their environment
what does biotic mean?
living
what does abiotic mean?
non living
what is symbiosis?
a close relationship between two species
what is predation?
act of killing and eating other animals
what is competition?
competing for resources such as land nutrient
what is an example of a biotic-abiotic interaction?
• dry season • fish suffocate due to lack of oxygen (pollution) • soil erosion
what is a sustainable ecosystem?
an ecosystem condition in which balances are maintained over time
what is sustainability?
the ability to maintain balance over time
what is a species?
a group of living organisms consisting of similar individuals