butterflies of the "edge"
Robert J. Parcelles,Jr.
rjparcelles at yahoo.com
Fri Sep 22 16:19:53 EDT 2000
The "edge" or ecotone concept is a cornerstone of
population ecology, regardless of taxum. This is very
evident in birds. There is much more biodiversity on
tne border of ecosystems or communities that in the
inner areas. Just as populations are a continum, so
is the concept of niche. The ecotone usually has a
greater density at all levels of the food chain.
Interesting thread. I hope we can continue it.
--- Mark Walker <MWalker at gensym.com> wrote:
> Wow! With all the other stuff being discussed, I
> almost missed this. What
> an absolutely marvelous and refreshing question. I
> certainly have some data
> - but I'd prefer to wait and listen to other more
> formalized responses.
> I'm hoping to hear many.
> Mark Walker
> Oceanside, CA
> > -----Original Message-----
> > From: John Grehan [mailto:jrg13 at psu.edu]
> > Sent: Sunday, September 17, 2000 6:04 PM
> > To: leps-l at lists.yale.edu
> > Cc: smap at africaonline.co.ke
> > Subject: butterflies of the "edge"
> > The following is a modified email request from
> Smruti Damania for
> > information regarding butterfly behaviour and
> ecology that I am not
> > sufficiently familier with
> > to provide answers. If anyone on the list would
> like to
> > provide information
> > on these aspects and any pertinent literature I am
> sure she
> > would be most
> > grateful. She is not a member of the list
> (although I will
> > suggest that she
> > might
> > like to join) so please send responses to her
> email address
> > (but also post on
> > the list if you think the points might be of
> > interest). John Grehan
> > From: "Damania" <smap at africaonline.co.ke>
> > I am a recent BSc. Zoology graduate from the
> University of
> > Eastern Africa,
> > Baraton. I am immensely interested in biological
> research and
> > am an ardent
> > butterfly enthusiast. While at the university, I
> had carried
> > out several
> > researches regarding the use of Lepidoptera as
> > of different
> > biomes.
> > According to my research, the greatest diversity
> > Lepidoptera were found
> > in a sampling station that is a grassland patch
> lying at the edge of a
> > cultivated
> > farmland. In my research, this 'edge' accounted
> for the
> > highest distribution
> > class of Lepidoptera. Also, another interesting
> fact was that while
> > sampling in the indigenous woodland biome of my
> study area, I found
> > aggregates of Milkweed butterflies(Amauris
> albimaculatus) to prefer a
> > certain area within the biome
> > where trees had recently been felled; and a path
> lay alongside.
> > I am curious as to why the preference for living
> on the
> > 'edge' should be so.
> > What exactly is it about the 'edge' that attracts
> > to it? From my
> > observations, I found that the boundary zone
> > different biomes was
> > much more preferred than within the biome itself.
> Why opt for
> > the 'boundary
> > line'
> > or the 'edge' ,as you call it, in preference to an
> > established, stable biome?
> > I still cannot understand this, perhaps due to my
> > knowledge on these
> > amazing creatures.
> > In my research, A. albimaculatus, Papilio
> demodocus, Papilio
> > dardanus,
> > Papilio nireus and Vanessa cardui all show a
> preference to
> > the 'edge'.
> > What butterflies in America show a similar
> preference for the edge?
> > Butterflies are still a relatively new field of
> study in my
> > country, where
> > conservation efforts tend to lean toward more
> economically profitable
> > species.
> > Thankyou,
> > Smruti. (Miss Smruti Damania, P.O. Box 975,
> Nakuru, Kenya)
Bob Parcelles, Jr.
Pinellas Park, FL
rjparcelles at yahoo.com
rjpassociates at yahoo.com
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