well tested idea that explains multiple observations
well tested idea that can be explained by a single equation
population growth & increasing consumption per person leads to what?
environmental challenges: degradation of soils, loss of biodiversity and global atmospheric changes
explain the concept of sustainability
earth's carrying capacity
3 types of resources
renewable, nonrenewable and potentially renewable
What influenced the creation of the environmental movement?
the great depression
what book contributed to the creation of the EPA?
what does environmental unity mean?
it is impossible to change only one thing; everything effects everything else
what factors influenced the collapse of easter island?
trees used to move statues across the island, rats brought with the polynesians and loss of trees due to erosion
a grouping of plants, animals and microbes interacting with each other and with their environment in such a way as to perpetuate themselves
a large region characterized by a distant climate and specifically adapted organisms, especially plants
al the species on earth and their environments
places where a species is biologically adapted to living
what an animal feeds on, where an animal feeds, where an animal finds shelter and where an animal rests
what is a keystone species
a species that has a large effect on a community or ecosystem
what is the "competitive exclusion principle"
two species who attempt to compete for the same resources can not coexist in the same habitat, one will always go extinct or evolve
what are the "categories of organisms"
producers, consumers and decomposers
what factors of the physical environment can affect the survival of species
rainfall, temperature, light, wind, chemical nutrients, pH and fire
explain the concept of "optimum, zones of stress and limits of tolerance"
the survival, growth and reproduction of organisms is determined, in part, by maximum and minimum tolerance limits for physical conditions such as temperature
Law of limiting factors
any one factor being outside the optimal range will cause stress and limit the growth, reproduction, or even the survival of the population
what two factors determine climate?
precipitation and temperature
transfer of energy from one object to another
a pyramid that shows the availability of energy that connects the consumers with the decomposer
two species interact in ways that benefit each other
which 3 biomes are most productive?
estuaries, swamps & marshed and tropical rain forests
why are the top 3 biomes rated higher than agricultural land?
what are some emerging problems with game animals
number of animals killed on roadways exceeds the number killed by hunters, animals are thriving in highly urbanized areas, some animals have no predators but hunters, urbanization encroaches on the wild
relationship between human and animal population
becoming more hazardous
what is an endangered species
very few of the species left on the planet
what is a threatened species
animals that are threatened to become endangered
3 major causes for extinction
hunting, habitat destruction and species introductions
4 problems that lead to habitat destruction
conversion, fragmentation, simplification and pollution of habitat
lacey act of 1900
prohibits transporting live or dead wild animals or their parts across borders without a federal permit
endangered species act 1973
illegal for americans to import or trade in any product made from an endangered or threatened species
role of US fish and wildlife service in protecting endangered species
protection for the habitat of endangered species
role of the national marine fisheries service
identifies and lists endangered and threatened ocean species
lists 675 species that cannot be commercially traded, a governing body that regulated
international trade and flatly prohibits trade in products from endangered species
recent decline in bat populations
white nose syndrome
something that can be used again in a different way
protection or restoration of the natural environment
to keep something the way it is
maximum sustainable yield
the largest yield or catch that can be taken from a species stock over an indefinite period
restoring something to its original nature
major reasons for the destruction of tropical rainforest
how good is the rainforest soil for growing crops?
what is the importance of coral reefs and mangrove trees
they both provide nutrients
debt for nature swap
banks hold 1 trillion in loans to developing countries, poor countries receive debt relief in exchange for an agreement to protect land
wise use movement
environmental backlash that minimizes the extent of problems and encourages the exploitation of resources
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