EESC04H3 – Lecture 1
Goals of Biogeography
Laws and concepts that explains the bigogeographic processes and account for biotic distributions
Provide baseline information (ecologist) talk more about landscape level and infer what’s impt. In
determining those laws and concepts – spatial and temporal distribution of organisms can we make this
prediction to conserve and manage Earth’s biotic resources and heritage.
Investigation of symbioses – plant and insects
Poison IVY !!!
Pants – just avoid plants with leaves in groups of 3 for now.
What is biogeography?
Study of biological patterns and processes past present future occurring over broad geographic and
Biogeography - study og geographical distribution of organisms their habitats ecological biogeographic
Habitat how organisms survive and change their habitats
Local change – continental drifts and biological change
What is biodiversity?
Variety of life forms together with abundance and distribution in time and space. Biodiversity is often
used as a measure of health of biological systems.
Biodiversity – measured in variety of ways (species richness,eveness, abundance)
Modulation – reduction in biodiversity
Assumption - process interconnected – we believe that biodiversity is good inherently there is a general
understanding that we are changing it homogenizing it. Little more stable if diverse. Presume
biodiversity is healthy. But there is a limit to that.
Spatial distribution in diversity – must be appropriate to. Making changes but don’t know the impacts of
Species richness – how many diff.species in a specific area (pool)
Eveness – spread out cluster of one species or little spread out species
What organisms are found where?
Darwins – theory of selection
Bolete – part of mushroom that reproduce
Fungi – cacti
Dark diversity – missing
Pacific ocean south of Japan
Deepest pt. no light high pressure acidic toxic hot yet there is organisms in here Extremeophiles – abyssal benthic communities in hyrothermal vents
Exploration is going on – looking for life in space
How many living things are there
Bet.14-17million but 10x these numbers
Spend a lot identifying ants – Wilson
Insects more 30 million insects and viruses bacteria
Higher plants – flowering plants
Botanist - plants have biomass – few of insects relative to plants
Plants are drivers in earth’s ecosystem
Majority of spp.are insects and flowering plants due to symbioses bet. These two groups
Symbiosis bet those two…
Insects eat plants
Plants depend on insects for pollination
Insects promote plant from propagating
Is classification impt?
Pop. Whose members are able to interbreed freely under natural conditions
Each biological species is a closed gene pool(shared genes) evolution of traits that are diagnostic in