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SOCNET  October 2005

SOCNET October 2005

Subject:

Re: Ecological Systems / Network Theory

From:

"Johnson, Jeffrey C" <[log in to unmask]>

Reply-To:

Johnson, Jeffrey C

Date:

Mon, 24 Oct 2005 16:32:52 -0400

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (120 lines)

*****  To join INSNA, visit http://www.insna.org  *****

There are two overlapping groups of ecologists doing ecological network
analysis and food web analysis that may be of interest.

Bob Ulanowicz at Maryland is an important name for ecological network
analysis.  For food webs Neo Martinez and Jennifer Dunne are important.
The following have been published over the last few years including soc
net people as co-authors;


J.J. Luczkovich, S.P. Borgatti, J.C. Johnson, & M.G. Everett. "Defining
and Measuring Trophic Role Similarity in Food Webs Using Regular
Equivalence". The Journal of Theoretical Biology (2003) 220, 303-321.

J.J. Luczkovich, G.C. Ward, J.C. Johnson, R.C. Christian, D. Baird, H.
Neckles, and B. Rizzo. "Determining the Trophic Guilds of Fishes and
Macroinvertebrates in a Seagrass Food Web." Estuaries (2002) Vol. 25,
No. 6, p.1143-1164, December.

J.C. Johnson, S.P. Borgatti, J.J. Luczkovich, and M.G. Everette.
"Network Role Analysis in the Study of Food Webs: An Application of
Regular Role Coloration". The Journal of Social Structure Vol. 2, No. 3,
May 8, 2001.

R. R. Christian, D. Baird, J. J. Luczkovich, J. C. Johnson, U. Scharler,
and R. E. Ulanowicz   Role of Network Analysis in Comparative Ecosystem
Ecology of Estuaries.  In "Aquatic Food Webs: an Ecosystems Approach",
A. Belgrano, U. Scharler, J. Dunne, and R. E. Ulanowicz (eds.),  Oxford
University Press (2005) .

And we have recently presented papers at an ecology meeting bringing
some ideas from social network analysis to the study of ecological
networks:

J. C. Johnson, J. J. Luczkovich, and S. P. Borgatti. "A Continuous-Time
Markov Chain Model (SIENA) of the Seasonal Trophic Network Dynamics of
the Chesapeake Bay."Paper presented at the Estuarine Research Federation
Biennial Conference, Norfolk, VA, October 16-20, 2005.

J.J. Luczkovich1, J. C. Johnson, and S. P. Borgatti. "Visualization of
the seasonal trophic network dynamics of the Chesapeake Bay."  Paper
presented at the Estuarine Research Federation Biennial Conference,
Norfolk, VA, October 16-20, 2005.

There have been some recent attempts to tie ecosystem based management
to network ideas for both humans and critters. However, this is
basically in its infancy.

There was a perspectives piece in Science describing interactions
between social and ecological network types:

S. McMahon, K. Miller and J. Drake. 2001. "Networking Tips for Social
Scientists and Ecologists". August 31, VOL 293 PP1604-1605.

And one in Nature on cliques in food webs:

Krause et al. 2001. "Compartments revealed in food-web structures".
Nature 426:282-285.

There are yet others, particularly in Science and Nature, but those are
mostly concerned with the scale free nature of such systems.

Hope this is helpful.


-----Original Message-----
From: Social Networks Discussion Forum [mailto:[log in to unmask]] On
Behalf Of rlanham
Sent: Saturday, October 22, 2005 7:23 AM
To: [log in to unmask]
Subject: Ecological Systems / Network Theory

*****  To join INSNA, visit http://www.insna.org  *****

I would be grateful if someone could give me a shortcut or two to some
connection points between ecological theories and networks.   Is there a
subnetwork of biologists or ecological economists out there who are
doing
things that link current network analysis to theories of
places/spaces/ecological systems?   I am having a difficult time finding
connections between these two hot areas in any literature.   Seems
obvious
enough to make such a connection, so I must not be searching the right
way.

Questions that might fit the sort of thing I am looking for...

Can ecologies be defined by the extent of certain network types?  For
example,
is the definition of a region the extent of its leadership network?
Do predator networks with prey define the carrying capacity of a given
ecosystem?
Are there theories of biologically sustainable spaces (of whatever sort)
and
network size/structure?
What are the influences of borders/boundaries on networks--I have seen
the
national information leakage work--are there other efforts here?
Is anyone working on links between adaptive management and networks?

It seems most network work is about growth and expansion rather than
boundaries, constraints, etc.  I cannot figure out why that is.

Thanks for any thoughts,

Ryan Lanham
[log in to unmask]

_____________________________________________________________________
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