GGR227H5 Lecture 3: Cycling of Matter
Document Summary
Ggr227 lecture 3 cycling of matter. Continuation from lecture 2 invasive species (alien species) Can upset ecosystem equilibrium and or succession. Invasive species multiply fast, strong competitors with native species. Can alter ecosystem, can reproduce sexually and asexually, disperse willingly, and can associate well with humans (activity) They are 2nd leading cause of biodiversity loss 1st is habitat destruction: canada has witnessed many 100s of alien species such as dutch. Elm disease, emerald ash borer: increased population immigration leads to some invasive. They are ecosystem engineers filer lake in 5< days. Quagga mussels are 2nd invasive species better cool water survival: longer growing season, these 2 mussels change the water ecosystem. Emerald ash borer: native to asia and russia, damages trees in larval form, impacts flow of nutrients up the trunk killing trees. Asian carp large in size and numbers, dominant in their invaded area, no predators to eat them. Giant hogweed from south-west asia now naturalizing in north.
