Print

Print


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

Some of classic ecological theories in organization communities use graph
theoretical / network analytic concepts such as structural  / role
equivalence, though not always in a precise way.
On boundaries and on comparing ecological models of dynamic competition
(e.g. Lotke-Voltera equations) and network models of competitive arenas see
Burt Ronald. S., and I.. Talmud, "Market Niche", Social Networks, 15 ,1993:
133-149.


 Talmud, Ph.D.
Head, Graduate Studies
Department of Sociology and Anthropology,\
University of Haifa
Phones: 972-4--8240992 (direct)
972-4-8240995 / 8249505 (secretaries)
Fax: 972-4-8240819
http://soc.haifa.ac.il/~talmud/
http://soc.haifa.ac.il/community

----- Original Message -----
From: "Johnson, Jeffrey C" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, October 24, 2005 10:32 PM
Subject: Re: Ecological Systems / Network Theory


> *****  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]
>
> _____________________________________________________________________
> SOCNET is a service of INSNA, the professional association for social
> network researchers (http://www.insna.org). To unsubscribe, send
> an email message to [log in to unmask] containing the line
> UNSUBSCRIBE SOCNET in the body of the message.
>
> _____________________________________________________________________
> SOCNET is a service of INSNA, the professional association for social
> network researchers (http://www.insna.org). To unsubscribe, send
> an email message to [log in to unmask] containing the line
> UNSUBSCRIBE SOCNET in the body of the message.

_____________________________________________________________________
SOCNET is a service of INSNA, the professional association for social
network researchers (http://www.insna.org). To unsubscribe, send
an email message to [log in to unmask] containing the line
UNSUBSCRIBE SOCNET in the body of the message.