Data Set Citation:
When using this data, please cite the data package:
NCEAS 10641 : Urban: Interaction traits and metacommunity gene flow , National Center for Ecological Analysis and Synthesis , and Urban M. 2007.
Foraging trait variation in Ambystoma maculatum
nceas.306.6 (https://knb.ecoinformatics.org:443/knb/metacat/nceas.306.6/nceas)
General Information:
Title:Foraging trait variation in Ambystoma maculatum
Identifier:nceas.306
Abstract:
Predator-prey interactions often vary markedly across natural landscapes. One explanation for this variation is local genetic differentiation of prey traits due to selection from predators. Here, I evaluated the relative contributions of selection from a gape-limited predator (Ambystoma opacum) and spatial location within a larger landscape to explanations of variation in foraging, growth, and survival in 10 populations of temporary pond breeding salamander larvae (Ambystoma maculatum). In parameterized models, high gape-limited predation risk was predicted to select for intense foraging and rapid growth in larvae when migration rates were low (less than 5%). Under common garden conditions, salamander larvae from populations naturally exposed to constant predation risk from A. opacum foraged more actively than those from populations faced with lower predation risks. Higher foraging rates were associated with lower survival in populations exposed to free-ranging A. opacum predators. These results demonstrate for the first time that prey hunger can evolve in a natural landscape of variable gape-limited predation risk depending on natural selection for growth into a size refuge. Moreover, evidence suggests that foraging-predation risk tradeoffs can evolve over microgeographic scales. However, foraging rates also appear to have been affected by gene flow: prey individuals from populations with high predation risk foraged more actively if located within regions with similar predation threats. This interaction between local selection and spatial location suggests a joint role for adaptation and maladaptation in shaping species interactions across natural landscapes, a finding with implications for dynamics at the population, community, and metacommunity levels.
Keywords:None:
  • predator-prey evolution (theme)
Publication Date:2007-03-09
Data Table, Image, and Other Data Details:
Metadata download: Ecological Metadata Language (EML) File
Data Table:feeding_data_deposit.txt ( View Metadata | Download File download)

Involved Parties

Data Set Creators:
Organization:NCEAS 10641 : Urban: Interaction traits and metacommunity gene flow
Organization:National Center for Ecological Analysis and Synthesis
Individual: Mark Urban
Organization:NCEAS
Address:
735 State Street, Suite 300,
Santa Barbara, California 93101
Phone:
805-892-2520 (voice)
Email Address:
urban@nceas.ucsb.edu
Data Set Contacts:
Individual: Mark Urban
Organization:NCEAS
Address:
735 State Street, Suite 300,
Santa Barbara, California 93101
Phone:
805-892-2520 (voice)
Email Address:
urban@nceas.ucsb.edu
Metadata Providers:
Individual: Mark Urban

Data Set Characteristics

Geographic Region:
Geographic Description:Totoket Ridge, Northford, CT
Bounding Coordinates:
West:  -72.1333  degrees
East:  -72.1333  degrees
North:  41.4000  degrees
South:  41.4000  degrees
Time Period:
Begin:
2004-04-01
End:
2004-06-15
Taxonomic Range:
Classification:
Rank Name:Species
Rank Value:Ambystoma maculatum

Sampling, Processing and Quality Control Methods

Step by Step Procedures
Step 1:  
Description:

Common garden

Larvae were raised in a temperature and food-controlled environment. A. opacum cues were added every 2 days.

Sampling Area And Frequency:
full extent
Sampling Description:
Totally randomized design, containers were repositioned every 2 days.

Data Set Usage Rights

Obtain permission from data set owner(s)
Access Control:
Auth System:knb
Order:denyFirst
Metadata download: Ecological Metadata Language (EML) File