Hi Mark,
Maybe data on sun exposure and temperature differences related to tree
canopy aspect (instead of boulder aspect) may also be helpful?
Information concerning your question 1 may be found in Stoeckli et al.
(2008): Influence of Canopy Aspect and Height on Codling Moth
(Lepidoptera: Tortricidae) Larval Infestation in Apple, and
Relationship between Infestation and Fruit Size. J. Econ. Entomol.
101(1): 81-89.
Karsten
At 5:35 PM +0100 8/13/10, Mark Wilson wrote:
Hi folks,
I am looking for a reference which states
(1) that in the northern hemisphere the north side of boulders are
less exposed to the sun than the south side
and
(2) that the east side of boulders are exposed to the sun only in the
morning when temperatures tend to be cooler while west sides are
exposed during the afternoon when temperatures tend to be higher and
as a result the north and east side of boulders are likely to stay
cooler and damper longer.
Any suggestions?
Mark
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Dr. Karsten Mody
ETH Zurich
Institute of Plant, Animal and Agroecosystem Sciences
Applied Entomology
Schmelzbergstrasse 9 / LFO
CH-8092 Zurich
Switzerland
Phone +41 (0)44 632 39 33
Fax +41 (0)44 632 11 71
Email [email protected]
