foodwebs {igraphdata}

A collection of food webs

Description

A list of graphs. Each one is a food web, i.e. a directed graph of predator-prey relationships.

Usage

foodwebs

Format

A named list of directed igraph graph objects. Here are the list of the graphs included:

‘ChesLower’

Lower Chesapeake Bay in Summer.

Reference: Hagy, J.D. (2002) Eutrophication, hypoxia and trophic transfer efficiency in Chesapeake Bay PhD Dissertation, University of Maryland at College Park (USA), 446 pp.

‘ChesMiddle’

Middle Chesapeake Bay in Summer.

Reference: same as for ‘ChesLower’.

‘ChesUpper’

Upper Chesapeake Bay in Summer.

Reference: same as for ‘ChesLower’.

‘Chesapeake’

Chesapeake Bay Mesohaline Network.

Reference: Baird D. & Ulanowicz R.E. (1989) The seasonal dynamics of the Chesapeake Bay ecosystem. Ecological Monographs 59:329-364.

‘CrystalC’

Crystal River Creek (Control).

Reference: Homer, M. and W.M. Kemp. Unpublished Ms. See also Ulanowicz, R.E. 1986. Growth and Development: Ecosystems Phenomenology. Springer, New York. pp 69-79.

‘CrystalD’

Crystal River Creek (Delta Temp).

Reference: same as for ‘CrystalD’.

‘Maspalomas’

Charca de Maspalomas.

Reference: Almunia, J., G. Basterretxea, J. Aristegui, and R.E. Ulanowicz. (1999) Benthic- Pelagic switching in a coastal subtropical lagoon. Estuarine, Coastal and Shelf Science 49:363-384.

‘Michigan’

Lake Michigan Control network.

Reference: Krause, A. and D. Mason. (In preparation.) A. Krause, PhD. Dissertation, Michigan State University. Ann Arbor, MI. USA.

‘Mondego’

Mondego Estuary - Zostrea site.

Reference: Patricio, J. (In Preparation) Master's Thesis. University of Coimbra, Coimbra, Portugal.

‘Narragan’

Narragansett Bay Model.

Reference: Monaco, M.E. and R.E. Ulanowicz. (1997) Comparative ecosystem trophic structure of three U.S. Mid-Atlantic estuaries. Mar. Ecol. Prog. Ser. 161:239-254.

‘Rhode’

Rhode River Watershed - Water Budget.

Reference: Correll, D. (Unpublished manuscript) Smithsonian Institute, Chesapeake Bay Center for Environmental Research, Edgewater, Maryland 21037-0028 USA.

‘StMarks’

St. Marks River (Florida) Flow network.

Reference: Baird, D., J. Luczkovich and R. R. Christian. (1998) Assessment of spatial and temporal variability in ecosystem attributes of the St Marks National Wildlife Refuge, Apalachee Bay, Florida. Estuarine, Coastal, and Shelf Science 47: 329-349.

‘baydry’

Florida Bay Trophic Exchange Matrix, dry season.

Reference: Ulanowicz, R. E., C. Bondavalli, and M. S. Egnotovich. 1998. Network analysis of trophic dynamics in South Florida ecosystems, FY 97: the Florida Bay ecosystem. Annual Report to the United States Geological Service Biological Resources Division, University of Miami Coral Gables, [UMCES] CBL 98-123, Maryland System Center for Environmental Science, Chesapeake Biological Laboratory, Maryland, USA.

‘baywet’

Florida Bay Trophic Exchange Matrix, wet season.

Reference: same as for ‘baydry’.

‘cypdry’

Cypress, dry season.

Reference: Ulanowicz, R. E., C. Bondavalli, and M. S. Egnotovich. 1997. Network analysis of trophic dynamics in South Florida ecosystems, FY 96: the cypress wetland ecosystem. Annual Report to the United States Geological Service Biological Resources Division, University of Miami Coral Gables, [UM-CES] CBL 97-075, Maryland System Center for Environmental Science, Chesapeake Biological Laboratory.

‘cypwet’

Cypress, wet season.

Reference: same as for ‘cypdry’.

‘gramdry’

Everglades Graminoids - Dry Season.

Reference: Ulanowicz, R. E., J. J. Heymans, and M. S. Egnotovich. 2000. Network analysis of trophic dynamics in South Florida ecosystems, FY 99: the graminoid ecosystem. Technical Report TS-191-99, Maryland System Center for Environmental Science, Chesapeake Biological Laboratory, Maryland, USA.

‘gramwet’

Everglades Graminoids - Wet Season.

Reference: same as for ‘gramdry’.

‘mangdry’

Mangrove Estuary, Dry Season.

Reference: Ulanowicz, R. E., C. Bondavalli, J. J. Heymans, and M. S. Egnotovich. 1999. Network analysis of trophic dynamics in South Florida ecosystems, FY 98: the mangrove ecosystem. Technical Report TS-191-99, Maryland System Center for Environmental Science, Chesapeake Biological Laboratory, Maryland, USA.

‘mangwet’

Mangrove Estuary, Wet Season.

Reference: same as for ‘mangdry’.

Each graph has the following vertex attributes: ‘name’ is the name of the species, ‘ECO’ is the type of the node, and integer value between one and five, meaning:

1. Living/producing compartment

2. Other compartment

3. Input

4. Output

5. Respiration.

The ‘Biomass’ vertex attribute contains the biomass of the species.

Edges are weighted, and the weights denote energy flux between the species involved.

The graphs also contain some informative graph attributes: ‘Author’, ‘Citation’, ‘URL’, and ‘name’.

Source

See references for the individual webs above. The data itself was downloaded from http://vlado.fmf.uni-lj.si/pub/networks/data/bio/foodweb/foodweb.htm.

References

See them above.