Katie Lotterhos FSU Department of Biological Sciences, FSU
When we look at a salt marsh, we see thousands of stems of cordgrass. But in reality, the coastline may be made up of only a few different genetic individuals. This is because Spartina can spread by growing clones of itself, with the exact same genetic code (a genotype). Why does it matter if we know whether or not a salt marsh is made up of one or many different genotypes? Well, different genotypes will have different abilities to resist pests or disease, or they may be tastier to eat for the little marsh critters like snails and grasshoppers. Since some genotypes will be better than others in different situations, we care about genetic diversity because it can be a buffer against an uncertain environment.