sue laurance: it's a lot darker in here. we are a couple hundred yards from the forest edge now and you can see just what a dramatic change it's been -- a lot cooler, a lot darker. you gothese big forest palm trees, and the forest understory is just generally a t sparser now. we don't have that profusion of vines, and we have got a lot of these sde-loving plants which can't survive on the harsh forest edge. we call thisnvironment in here the core of t habitatragment. and we are very coerned about how much area ore habitat do we have? and what we are really saying is how much area of pristine rainforest is left with aorest fragment? and this is very important to tell what species are going to survive in forest fragments. is the core habitat big enough to have more than one individual of this palm species? because some of these species can be very rare -- there could only be one per acre. so do you need to have 50 acres to have 50 individuals? and will that be enough for that population to survive for couple hundred years? nar