[Mastwatch] Shorea albida

Ashton, Peter pashton at oeb.harvard.edu
Mon Mar 31 04:47:31 PDT 2014

Chuck et al.,

Kapur are well known to flower out of mast seasons, as well as in them.Tim Whitmore (see his 1984 book) attributed the gregarious tendency of all kapur species to 'reproductive pressure', though they have other attributes which give them advantage.

The absence of Dr. lanceolata on the west side of Gng Palung is due, surely, to the predominance of granite-derived sandy soils there (alluvial bench excepted) . Kapur paji is confined to yellow-red clay loams in my experience. In fact, It is rare to find two kapur species in mixture: Even in Lambir, Dr aromatica, on deep yellow sands, and Dr lanceolata hardly mix there. Every species seems to have a unique edaphic range.


From: Chuck Cannon [chuck.cannon at gmail.com]
Sent: Sunday, March 30, 2014 3:37 PM
To: Burslem, Dr David F. R. P. (School of Biological Sciences); Ashton, Peter; Ferry Slik; mastwatch at lists.phylodiversity.net
Subject: Re: [Mastwatch] Shorea albida

I've always had a feeling that Dryobalanops was gregarious and they
attempt to fruit more frequently than other Dipts, perhaps locally
creating the benefits of synchronous fruiting?  The populations north of
Gunung Palung flowered and fruited (with varying success) completely
outside of any general fruiting.  Does anyone think that kapur behaves
differently than other dipts?

I've always been curious about the fact that kapur is so abundant north
of the Matan River (which forms the northern border of Gunung Palung NP)
and on the eastern side of the Palung mountain range, while it is
virtually absent on the western side, where the research site is
located.   Chance of history and limited dispersal?


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