[Taxacom] Help on a literature reference

[Haveman, Rense]

Dear Taxacomers,

Some time ago I've read a paper in which it was stated that - forgive me
the unaccurateness of my phrase - conservation of biodiversity should
target the conservation of regions with a high overall speciation rate,
instead of regions with a high species diversity. Somehow I managed to
remember the message, but stupidly I forgot where I've read it. So,
please, can anyone bring some light in my darkness?

Thanks in advance,

Rense Haveman
Alterra - Centre for Ecosystem Studies
Wageningen University and Research Centre - The Netherlands