Science Home

Manuscripts

Fig 2: Here you can see that the top predators all eat at lower trophic positions in the fished vs unfished reefs. This may indicate an invisible collapse of food chain complexity in even lightly fished ecosystems.

Figures


Fig 1: This isotopic biplot allows you to 'see' what each marine organisms eats using isotopes. The high d15N values of the sharks and trevallies are evidence that they are the top predators in this system.

I am interested in learning how to use science to protect wildlife and wild spaces on our planet. I have been working on a couple papers; these figures are from one I just submitted to Ecological Applications. Here I used some muscle and tissue samples from sharks, fish, and corals at two different reefs, one fished, and one unfished. I analyzed them for their stable isotope values. Stable isotopes can tell you a bit about where an animal eats and how it eats it, and also how the entire food web is structured. I am hoping to discover how fishing may result in unseeable changes to the functioning of an ecosystem. I hope this will encourage people to reduce or limit fishing in protected areas!  I am also working on some other projects including one looking at how urchin communities may help protect reefs from overfishing – I am still just analyzing data from that project but some pictures from my field work are below.