Is it possible to get a Phd on a topic not directly related my the course (one based in ecology rather than bioscience) or not? if it is possible would i first hav to get experience working somewhere/learning the techniques needed?

It is possible - but there will be a hell of a lot of competition for the phd's from ecology graduates. I have an MSc in Ecology and there are many like me trying for those places! Apply anyway but think about doing an MSc in Ecology as well - your then much more likely to be considered in the future

There are very few positions available for a PhD in ecology. Ecology is in the top 3 of keywords searched on FindAPhD. Think about an MSc and voluntary work in the sector.