Juniper2007OriginSweetApple (dragged) 5

Juniper2007OriginSweetApple (dragged) 5 - long to indulge...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
2007 January–February 49 © 2007 Sigma Xi, The Scientific Research Society. Reproduction with permission only. Contact long to indulge in some sort of mutual selection pressure. Wherever they are, bears learn quickly. The brown bears of Montana are known, as the artist Ja- net McGahan saw in 2001, to seek out and feed on the sweeter fruits of the grafted apple trees (imported Malus pumila ) in planted orchards. The jaws and guts of a bear, as Anna Traveset at the Mediterranean Insti- tute for Advanced Studies and her co- workers have shown, do little or no damage to the teardrop-shaped, hard and tannin-coated apple pip. Traveset’s group examined a wide range of gut- transmitted seeds, and in virtually ev- ery case the viability of the seeds was either neutral or enhanced. The fecal loads are dumped all over the Tian Shan in the fall—in a fertile mix of nitrogen- rich compost and, we have demonstrat- ed in trial plots, carrying bear-viable apple seed . Then we suppose that, as on every other continent in the world, a spectrum of hard-working dung beetles will disperse, in their various ways, the whole fecal mass along with its fellow- traveling seeds. Thus, probably over the whole of
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online