BIOLOGY 2F03 Chapter Notes - Chapter 22: Environmental Niche Modelling, Cryptozoology, Macroecology
22 Sep 2016
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Chapter 22 macroecology pgs 577-581, pgs 582-586, pgs 586-591, pgs 597-599, pgs 600-604 (summary) Goal is to combine a species" niche requirements with the spatial distribution of environmental conditions on a landscape or across a region. Identify the niche: determine the distribution of environmental conditions throughout area of concern, combine this information to produce a map of potential distributions. Predicting the spread of an invasive crab species. When prediction the spread of invasive crab species through north america, they created a niche equation to the environmental conditions. Resulting map indicated strength of match between niche requires as determined from its asian distribution and local environmental conditions of north america. Occurrence of crabs were less than 1,261 km from the sea, and 90% of occurrences were less than 355 km. Issue that could influence invasion risk is the frequency with which this species is introduced at different locations. Dominant vectors for invasions are ships with ballasts.
