Species Richness (Week 5 Lecture 8) Flashcards
Why is the preservation of biodiversity is important because recent experiments show that?
Communities perform best when they have a full complement of species.
Canada has a system of ______ parks located in nearly all of the principal biomes
34
How were species lost from parks?
Hunted
How was species richness increased in parks?
Species associated with humans
Other species deliberately introduced
______ theory states there are more plant species in the tropics than any other climatic zone and that these plant species support higher numbers of herbivorous animal species, and hence more carnivores
Spatial heterogeneity theory
______ theory is In temperate climates, natural selection operates through harsh environmental extremes whereas in the more constant tropical temperatures, species compete more keenly and interact more.
Competition
______ theory states that predators and parasites in the tropics hold prey populations down to low levels
Predation
______ states that coevolution of plants and pollinators ensures high rate of speciation
Animal Pollinator theory
______ theory states that species richness increases over time
Evolutionary time
______ theory states based on the notion that larger areas contain more species because larger areas can support larger populations
Area
______ theory proposes that greater primary production by plants results in greater overall richness
Productivity
______ theory proposed that effective evolutionary time promotes high species richness
Evolutionary speed
True or False: Communities from different parts of the globe are similar
True
Who named the differences in richness of species?
Robert Whittaker
Who identified 25 “hot spots” for endemic forest plants.
Norman Myers
