Ecosystems Study Guide
Terms in this set (38)
Draw an energy pyramid. Label each level with the type of organism that would be found there.
What level would turtles that feed on insects be in a energy pyramid?
What level would producers be found on?
What happens to the amount of stored energy in a food chain?
90% of energy is lost at each level and only 10% is carried on
What are primary consumers?
Primary consumers are herbivores, feeding on plants, insect, squirrel and small birds
What organism is usually at the top of a food chain? The bottom?
Top: Tertiary consumer, top carnivores, producers: plants
What is the difference in a primary consumer and a secondary consumer?
Primary consumers: consume producers Secondary Consumers: consume primary consumers
Define competitors when it comes to organisms in a food web.
Organisms that compete for the same food source
Can energy be recycled or is it lost?
What is the difference in an abiotic factor and biotic one?
Abiotic: A nonliving factor in the environment Biotic: A living factor in the environment
What is an ecosystem? Give an example of one.
a biological community of interacting organisms and their physical environment. Forest
Where does most of the ecosystems energy come from?
What is an organism? Give an example
an individual animal, plant, or single-celled life form. Dog
What is a population? Give an example
A group of organisms that are closely related and can mate to produce fertile offspring A group of dogs
What is a community? Give an example
All population of different species living in the same place at the same time A group of dogs, cats, and fish
Why are decomposers so important to the environment? What is their niche?
Decomposers are important to ecosystems because they break down and return nutrients like raw material back into the soil, so they can be used by green plants to make more food. Without decomposers the green plants will not have a supply of nutrition. The niche of a decomposer is that they eat and live by feeding on dying things or already decayed things such as plants and animals.
What is a biotic factor?
Biotic: A living factor in the environment
Give three examples of abiotic factors.
Temperature, sunlight and weather
What is the difference in a food web and a food chain?
A food web is made up of interconnecting food chain. It shows the feeding relationship relationship among species in a community. It shows that organisms eat more than one kind of food.
What is the primary function of a decomposer?
Decomposers and scavengers break down dead plants and animals. They also break down the waste (poop) of other organisms. Decomposers are very important for any ecosystem. If they weren't in the ecosystem, the plants would not get essential nutrients, and dead matter and waste would pile up.
What is a symbiotic relationship?
between 2 organisms in which one organisms that live near or inside the other and at least one benefits
What is mutualism and give an example.
a relationship between 2 organisms benefits ex cow bear and cow
What is commensalism and give an example.
one organism benefits ex eyelash mite in a human
What is parasitism and give an example.
Decomposers break down the dead organic matter they are important because that breakdown and return nutrients to the soil so these nutrients can be used by green plants to make food
Explain what an organism's niche is.
An organism's role in a ecosystem which includes everything the organist does and everything the organism need in its environment.
Explain the difference in environmentalism and environmental science.
concern about and action aimed at protecting the environment while environmental science is the science of the interactions between the physical, chemical, and biological components of the environment, including their effects on all types of organisms but more often refers to human impact on the environment.
What is the difference in a renewable resource and a nonrenewable resource? Give an example of each.
Nonrenewable: any natural resource from the Earth that exists in limited supply and cannot be replaced if it is used up--fossil fuels, oil, gas Renewable: Any resource that can or will be replenished naturally in the course of time-- wood, paper, leather
What is the difference in the industrial revolution and agricultural revolution?
The agricultural revolution was to do with farming techniques, new kinds of crops, land and livestock management, This all led to an increased food supply and therefore a significant population increase.It began in Britain around the beginning of the 18th century. The industrial revolution had to do with harnessing new energy sources and using them to power machines.It led to a growth in urban development as people moved from the countryside to the towns to work in the new factories built to utilise the new machines for faster,mass production.It began towards the end of the 18th century in Britain,The workers to make the factories viable businesses came from the population increase started by the agricultural revolution.
Define supply and demand. Give an example.
supply and demand is an economic model of price determination in a market. Popular toys being more expensive around the holidays
Define cost benefit analysis. Give an example.
a systematic approach to estimating the strengths and weaknesses of alternatives; transactions, activities, functional business requirements or projects investments
How does the fixed nitrogen that plants need get to the soil?
Through bacteria in the soil
What gas do plants breath in? Animals?
To unlock the energy in the carbohydrate produced in photosynthesis, green plants need to respire, just as animals do. Respiration takes place in the plant's cells, using oxygen to produce energy and giving off carbon dioxide as a waste product.
How much energy is lost at each trophic label? Be able to read an ecology pyramid and tell me how much energy is at each level.
Define succession and know the difference in primary succession, secondary succession and climax community.
Two different types of succession—primary and secondary—have been distinguished. Primary succession occurs in essentially lifeless areas—regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier.
Give me an example of a producer, herbivore and a carnivore
Grass, sheep and wolf
What is a keystone species and why are they so important to an ecosystem?
an organism that helps define an entire ecosystem. Without it, the ecosystem would be dramatically different or cease to exist altogether. ... The ecosystem would be forced to radically change, allowing new and possibly invasive species to populate the habitat.
Define what an invasive species is.
a species that is: 1) non-native (or alien) to the ecosystem under consideration and. 2) whose introduction causes or is likely to cause economic or environmental harm or harm to human health
Be able to pick out an ecosystem that has the richest diversity and the most abundance.
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