I define the edge effect as:
A term used to describe what occurs at habitat boundaries where two bordering communities influence one another.
My question is whether it generally leads to an increase or decrease in biodiversity (both evenness and richness) and why.
Also, what are the biogeographic factors that impact biodiversity relating to this edge effect?
I believe that species diversity would increase, as at such habitat boundaries species that inhabit the bordering habitats and those that can also be found in habitat boundaries would be present.
I do remember reading that light intensity increases due to the edge effect and thus also allows for shade-intolerant species to thrive, but I do not understand why.