Biodiversity
biodiversity helps ecosystems become more what?
Stable, sustainable, balanced
Give me an example of an organism
1 of anything alive
What is carrying capacity?
maximum amount of organisms an ecosystem can hold
define a native species
lives where it is born
this type of species is usually small, has lots of kids, and has a short life span
3/r
Planting native plants in your backyard is good for the biodiversity
True
All the trees in a forest is a population
false
What vocab term did we talk about that would decrease population sizes?
emigration
define an invasive species
lives in a place it does not belong
This type of species is usually large, has few kids, and lives a long time
1/k
What happened to the biodiversity of yellowstone when they hunted all the wolves?
It decreased
What two factors make up an ecosystem
abiotic and biotic
Tell me the difference between an independent and dependent limiting factor
independent is abiotic and does not depend on the population size, while dependent is biotic and does depend on the population size
how do invasive species get to their new environment?
mainly by humans
humans depend on biodiversity for what?
food and oxygen
Define biodiversity
number and variety of organisms in an area
What is a biome? An example plus the definition
An ecosystem that shares the same climate and animals, example a forest
How can age diagrams show us what populations might do? GIVE ME ALL 3 EXAMPLES
mostly young, increase; mostly old, decrease; mixed, stay the same
what is a keystone species? and give me the example we talked about in class
impacts the whole ecosystem, and wolves
What would happen to a population if natality increases and mortality stays the same?
It would increase
What is the greatest threat humans pose to biodiversity?
habitat loss
List the levels of organization from largest to smallest
biosphere, biome, ecosystem, community, population, organism
What two factors help determine an increase in population size
birth rate (natality) and immigration
What is an indicator species and give me an example
a species whose presence reflects a certain condition, a bear
What factor do you think contributes most to humans exponential growth?
Availability of resources (food, water, hygiene supplies)