| Human harvesting of shellfish has raised concerns over ecosystem sustainability. |
| The reason for this is that the rich soil as well as the rest of the ecosystem has evolved a fairly balanced symbiosis. |
| Marine vertebrates including tunas, seabirds, sharks, sea turtles, pinnipeds and cetaceans use a pelagic ecosystem we barely understand. |
| Nothing like this vast, circumpolar ecosystem occurs in the Southern Hemisphere. |
| But the ecosystem is too interdependent for GM and non-GM crops to coexist without cross-fertilising. |
| Attention must therefore be paid to all aspects of the ecosystem and to their interactions when developing future generations of supercomputers. |
