Food Webs and Energy
How does an autotroph obtain its' energy?
Sunlight
What step in the carbon cycle takes carbon dioxide OUT of the atmosphere?
Photosynthesis
What type of succession starts on bare rock?
Primary succession
which type of growth has a carrying capacity? (logistic or exponential)
Logistic growth
What is global warming?
Earth's atmosphere is getting warmer due to greenhouse gases trapping in heat.
Grass-->Mouse-->snake-->hawk
What is the primary consumer in this food chain?
Mouse
What types of organisms are necessary for almost every step of the nitrogen cycle?
Bacteria
Which type of succession results from deforestation?
Secondary succession
give 2 density dependent factors
Resources, predation, disease, shelter/space
List 2 non-renewable resources
Coal, oil, fossil fuels
grass-->mouse-->snake-->hawk
Which trophic level is the hawk at?
Trophic level #4
Which nutrient cycle is the only one that doesn't have an atmospheric component?
phosphorus
What are the species that first inhabit an area called?
pioneer species
If a hurricane swept through an ecosystem killing many fish in the area, is this a density dependent or independent limiting factor?
Density independent
What are some problems resulting from invasive species?
native species are going extinct, the ecosystem is being harmed, the invasive species are growing out of control
grass-->mouse-->snake-->hawk
How much energy will the snake have if you start with 1000 J?
10 J
How does cellular respiration fit into the carbon cycle? (does it take away carbon out of the atmosphere or put carbon back in the atmosphere)
Cellular respiration puts carbon back into the atmosphere in the form of carbon dioxide
If a volcano erupts and the lava cools down, which type of succession will most likely occur?
Primary succession
A fish swims next to a shark to pick off scraps after the shark eats. What type of relationship is this?
commensalism
What are some solutions to the problem of deforestation?
plant trees and rebuild forests, use less resources that use trees (like paper)
Which trophic level has the most energy?
Trophic level #1
Give the step by step process of eutrophication
Build up of nutrients, algae bloom, algae die, bacteria decompose algae and use up oxygen in the water, fish and marine animals die because of lack of oxygen
Describe a climax community in succession
What is the maximum amount of a population that can be supported called?
carrying capacity
What are some main causes to the increase of greenhouse gases?
transportation, industry (factories), electricity, agriculture