SC BIOL 301 - Global Ecology (5 pages)

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Global Ecology

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Global Ecology


Landscape Ecology, Species to area, Island Biogeography, Biodiversity, Effects of Earth’s History

Lecture number:
Lecture Note
University Of South Carolina-Columbia
Biol 301 - Ecology and Evolution

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Biol 301 1nd Edition Lecture 20 Outline of Last Lecture I Primary Productivity II Net Productivity III Movement of Energy IV Hydrologic Cycle V Carbon Cycle Outline of Current Lecture II Landscape Ecology III Species to area IV Island Biogeography V Biodiversity VI Effects of Earth s History Current Lecture Landscape Ecology Landscape ecology the field of study that considers the spatial arrangement of habitats at different scales and examines how they influence individuals populations communities and ecosystems Current habitat heterogeneity is a reflection of recent and historical events caused by natural and human forces Legacy effects a long lasting influence of historical processes on the current ecology of an area Natural forces e g tornadoes hurricanes floods mudslides fires continue to cause habitat heterogeneity Human activity has influenced the intensity frequency and ecological influence of natural forces Species richness often increases from the local to landscape scale because habitat diversity increases along this gradient Local i e alpha diversity the number of species in a relatively small area of homogenous habitat such as a stream Regional i e gamma diversity the number of species in all of the habitats that comprise a large geographic area Beta diversity the number of species that differ in occurrence between two habitats These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Regional species pool the collection of species that occurs within a region serves a source of species of all local sites within a region Species sorting the process of sorting species in the regional pool among localities according to their adaptations and interactions Species to area Species area curve a graphical relationship in which increases in area A are associated with increases in the number of species S Human activities have caused widespread fragmentation of large

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