Abiotic Factors Topography Temperature Water Abiotic Factors Soil Content Sunlight Communities and Populations Communities Assemblage of different populations that live together in a defined area ID: 778004
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Slide1
Community Interactions
Symbiosis
Slide2Abiotic Factors
Topography
Temperature
Water
Slide3Abiotic Factors
Soil Content
Sunlight
Slide4Communities and Populations
Communities
Assemblage of different populations that live together in a defined area.
Populations
Group of individuals of the same species that live in the same area.
Slide5Niche
Each species unique living arrangement in a community
A full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions.
Includes:
Habitat
Food sources
Time of day organism is most activePredatorReproduction
Slide6Symbiosis
Any relationship where two species live closely together
Symbiosis literally means “living together”
3 main types
Mutualism
Commensalism
Parasitism
Slide7Mutualism I Win – You Win (+,+)
Both species benefit from relationship
Slide8Symbiotic Mutualism
A remarkable 3-way mutualism appears to have evolved between an ant, a butterfly caterpillar, and an acacia in the American southwest. The caterpillars have nectar organs which the ants drink from, and the acacia tolerates the feeding caterpillars. The ants appear to provide some protection for both plant and caterpillar
Slide9Commensalism I Win (+,0)
One member of the association benefits and the other is neither helped nor harmed
Slide10Commensalism
Slide11Parasitism I win – You lose (+,-)
Slide12Parasitism
One organism lives on or inside another organism and harms it
Parasite obtains all or part of its nutrients from the other organism
Host
Organism that is harmed in relationship; the one that provides the nutrients to the parasite
Parasite
Organism that gets its nutrients from the host
Do they want to kill their host?No, because they need them…they will weaken or hurt the host in some way
Slide13Symbiotic Parasitism
Hook Worm
One Benefits, One is Harmed
Cutaneous larva migrans
Filariasis worm
Slide14Parasitism
Loa
Loa
Blood Dwelling Nematode in the conjunctiva of the eye
Slide15Parasitism
You’re not seeing things. There are
isopods in that fish’s mouth. And they’re not simply hiding in there – they’ve completely replaced the fish’s tongue. Meet the tongue-eating isopod (
Cymothoa
exigua
). Isopods are crustaceans, and one group of them – the Cymothoidae – parasitize fish. Most species are simple
ectoparasites that feed on the fish’s skin or gills. C. exigua goes further. The isopod gets into its host’s mouth and grabs onto its tongue with seven hooklike legs. Over time, the tongue degenerates, leaving the parasite hanging on to its stub. This change actually has very little effect on the fish, because it can still hold prey with the parasite. The isopod doesn’t just replace the tongue physically, it also replaces it functionally.
Slide16Symbiosis
Slide17Community interactions
Symbiosis-any relationship in which two species live closely together
MutualismCommensalismParasitism