{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

ecology test 3 study guide

ecology test 3 study guide - Ecology Exam 3 Competition...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Ecology Exam 3 Competition- species interactions competition- any use of defense of a resource by one individual that reduces the availability of that resource to other individuals competition leads to a decrease in carrying capacity no competition= highest population density intraspecific= next low interspecific= next high interspecific= lowest population density and carrying capacity competition may be interspecific or intraspecific interspecific - between different species i ntraspecific - within the same species consumer-resource interactions, regulates population growth in a density- dependent manner competition should be more intense between closely related species distantly related organisms also use many of the same resources (seal and penguin populations have increased because the population of whales has decreased who is a major competitor) consumer-resource interactions (predator-prey, herbivore-plant, parasite-host) + - competition - - mutualism + + commensalism + 0 amensalism - 0 Understand competitive exclusion predators can drive prey locally extinct habitat structure matters migration matters eventually a species will win out when competing for one niche two species cannot coexist on a single resource that is scarce (limiting) relative to the demand for it examples of competitive exclusion introductions of biological pest controls provide evidence for competitive exclusion among species using limiting resource (parasitoid wasps to control scale insects on cit- rus cycles, interspecific) paramecium- when grown separately both species thrived but when grown together one species died out define and know examples of resources resources - substances required for maintenance, growth and reproduction a resource is consumed (more then just eating) and therefore reduced consumer used it for its own maintenance and growth when resource availability is reduced then consumer population growth is re- duced
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
temperature is not a resource nonrenewable- occur in fixed quantities habitat space- replenished when the organisms is removed refuges or safe spots renewable - are continuously regenerated, some outside the system beyond the influ- ence of consumers (sunlight) and some within ecological system (predator-prey) food soil nutrients sunlight rain births in prey population- provide food decomposition of organic detritus - provide nutrients limiting- a resource whose available quantity cannot meet a population’s requirement for it if add more of a limiting resource, then the population will increase in size since K (carrying capacity) has changed however, now a different and second resource may now be limiting the popula- tion’s size synergistic- the combination of a resource is more effective than each resource alone (at the most intense light, combined nitrogen and phosphorus promoted
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 8

ecology test 3 study guide - Ecology Exam 3 Competition...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online