Lyme disease is caused by infections of the bacterium Borrelia bu...

Question

Lyme disease is caused by infections of the bacterium Borrelia burgdorferi (stained blue in inset, among red blood cells) which is transferred to humans via blood-sucking bites from the tick, Ixodes scapularis. Lyme disease can cause flu-like symptoms in the short term and more serious illnesses in the long term, if not treated. Why is Lyme disease on the rise in eastern North America?

Researchers have measured a positive correlation between forest fragmentation and incidence of Lyme disease. According to the theory of island biogeography, how do you predict fragmentation will affect species richness?

Accepted Answer

Hello everyone and welcome to today's video. So according to the equilibrium model of island bio geography, species diversity on an island is blank related to the size of the island and blank related to the island's distance from the mainland. While I think about this question in the following way, if we have a larger island, this larger island is going to be able to fit more species. So these are positively or directly related. So in the first blank we're going to put positively related because species diversity is possibly related to the size of the island. However, if we have an island that is very far from the mainland, remember that these animals are present in the island, come from the mainland. So if we have an an island that is very far from the mainland, less animals are going to be able to get to it. So let's write that down for from mainland, less species. So now we have that this is negatively related or inversely related. And this is what we're going to write down on the second blank because the island's distance from the mainland is negative related to the species diversity on the mainland. So this is going to be represented by answer choice. A That is the end of the video. I really hope this helped you and I hope to see you in the next one

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