Symbiosis and Populations
The symbiotic relationship in which one organism benefits and another is harmed
parasitism/predation
a number of species in an ecosystem
What is a community?
use solar or chemical energy to create food sources
What are primary producers?
Two reasons that habitat fragmentation (cutting up areas where wildlife range) is damaging to wildlife
What are edge, isolation, size decreases?
ecology focuses on the __________ among organisms and their environment
relationships/interactions
Species that are critically needed to maintain a community
What are keystone species?
two primary concerns of ecosystem ecology (or what plants and animals need to survive so they don't become extinct)
What are nutrients and energy?
biomes are based on these characteristics
What are temperature, precipitation, types of plants, general climate?
Animals within a population must be available for what activity with others of the species
breeding
Habitat needs that might cause a species to become extinct if they're not available
What are Limiting Factors?
drivers of primary productivity in aquatic systems
What are light, Nitrogen, Phosphorous?
things that change population size
birth immigration death emigration migration
A group of the same species in a community (like a herd of elk in Vernonia, OR)
What is a population?
species that is the first to arrive after a disturbance
What are pioneer species?
historical influences on the current ecology of the Yellowstone Valley include
What are the removal and reintroduction of wolves?
number and distribution of species
species diversity
Avian (bird) movement seasonally due to changing temperatures and food sources
species keep each other in balance due to eating the same food or needing the same space or shelter
What is Competition?
study of ecological patterns and processes at large spatial scales
landscape ecology
what subdisciplines of ecology focus on both biotic and abiotic factors?
landscape ecology, ecosystem ecology