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C. Ecology I. Ecosystems and Communities
Biodiversity
Zebra Mussels
Predator Removal
Climograph
Community Ecology
Interspecific Interactions and Community Structure
Disturbance and Community Structure
Biogeographic Factors
Competitive Exclusion Hypothesis
Microhabitats of Lizard Species
Anolis distichus – sunny leaf surface
Anolis insolitus – shady branch
Deceptive coloration
Camouflage – chick (poorwill); lizard
Aposematic (warning) coloration
Batesian mimicry – the hawkmoth larva (left) resembles a snake when
disturbed{harmless resembles harmful}
Mullerian mimicry – the cuckoo bee (left) and the yellow jacket both
have stingers that release toxins {both harmful but more exposure to potential
predators of linking markings with harm}
Mutualism – between acacia trees
and ants
Parasitic Nasonia (wasps)
Commensalism – one species
benefits, the other is neither harmed
nor helped (usually)
Trophic levels
– terrestrial and marine food chains
{make sure your assignment doesn’t
resemble this one! ; ) }
Antarctic marine food
web
Partial food web
Without Pisaster
ochraceous (sea stars) as
keystone predators…,
…the Mytilus californianus monopolized the space
Sea Otters are
keystone predators in the North
Pacific
A fire on a grassland burns the detritus and rejuvenates the prairie so that virtually all the biomass is living a month after a burn (right)
Large disturbances occur more often when small disturbances are prevented. Lodgepole pine cones
require intense heat to open and germinate.
Soil nitrogen concentration during succession after a glacial retreat
Forest community 1 is
more diverse b/c it has greater
heterogeneity – both in species
richness (number) and
relative abundance
Species richness generally
decreases towards the poles
Energy and Species Richness - annual available energy is measured by evapotranspiration
(combining solar radiation and temperature) and expressed as rainfall equivalents in mm/yr.
The number of plant species on the
Galapagos Islands in relation to the area of
the island.
Ecosystems
Primary Production
Secondary Production
Cycling of Chemical Elements
Human Impact
Energy flow = broken red lines; Material cycling = solid blue
lines
Energy = solar radiation chemical
transfers in food web heat radiated to space
Materials = pass through trophic levels
detritus back to primary producers
Fungi decomposing a log
Primary Production
Net Primary Production
II. Biomes
Lake Zonation
Oligotrophic Lake
Eutrophic Lake
Wetlands
Estuaries
Marine: 1. Tide Zone 2. Coral Reef 3. Benthos
Terrestrial Biomes
Tropical Forests: 1. Highland 2. Lowland 3. Seasonal
Deserts
Tundra
the Biosphere
Behavioral Ecology
Learning
Animal Cognition
Sociobiology
Behavior Components
Digger Wasp Behavior
Female Songbird Preferences
Geese Imprinting
Two types of bird-song development
Electronic Surveillance of honeybees
Cooperative Prey Capture
Territories (small!)
Staking Territories with Chemical Markers
Three-spined stickleback
courtship behavior
Bee Communication
Colonial Mammals
Naked Mole Rats the Common Mole Rat
Kin Selection and Altruism in the Belding Ground Squirrel
Ecology
• the biosphere• behavioral biology• population biology• community ecology• ecosystems
Population Ecology
Populations
Life Histories
Population Growth
Population Limiting Factors
Human Population /Growth
Conservation Ecology
Biodiversity Crisis
Conservation at the Population and Species Level
Conservation at the Community, Ecosystem, and Landscape Levels