E. T. Borer, E. W. Seabloom, J. B. Shurin, K. E. Anderson, C. A. Blanchette, B. Broitman, S. D. Cooper, and B. S. Halpern. 2005. What determines the strength of a trophic cascade? Ecology 86:528–537.


Supplement

Fully abstracted biological and methodological data (and associated literature citations) used in a cross-system meta-analysis of correlates of the strength of trophic cascades.
Ecological Archives
E086-028-S1
.

Copyright


Authors
File list (downloads)
Description
Literature citations


Author(s)

E. T. Borer
Department of Zoology
3029 Cordley Hall
Corvallis, OR 97331-2914
email: borer@science.oregonstate.edu

E. W. Seabloom
Department of Zoology
3029 Cordley Hall
Corvallis, OR 97331-2914

J. B. Shurin
Department of Zoology
The University of British Columbia
#2370-6270 University Blvd.
Vancouver, BC, Canada V6T 1Z4

K. E. Anderson
Department of Ecology, Evolution, and Marine Biology
University of California, Santa Barbara
Santa Barbara, CA 93106-9610

C. A. Blanchette
Department of Ecology, Evolution, and Marine Biology
University of California, Santa Barbara
Santa Barbara, CA 93106-9610

B. Broitman
Department of Ecology, Evolution, and Marine Biology
University of California, Santa Barbara
Santa Barbara, CA 93106-9610

S. D. Cooper
Department of Ecology, Evolution, and Marine Biology
University of California, Santa Barbara
Santa Barbara, CA 93106-9610

B. S. Halpern
National Center for Ecological Analysis and Synthesis
University of California, Santa Barbara
735 State St., Suite 300
Santa Barbara, CA 93101


File list

Supplement1.csv -- data from the 114 studies used in the meta-analysis

Description

This file contains data from the 114 studies used in the meta-analysis. The first line contains column headings that are defined below. At the bottom of Supplement1.csv are 3 rows for QA/QC. Labels for these rows can be found at the right side of the spreadsheet. In order, from top to bottom, the columns provide: (1) sum of all data in the column, (2) number of non-numeric cells in the column, and (3) number of missing values in the column. At the right side of Supplement1.csv, for each row of the spreadsheet, 3 columns provide: (1)sum of all data in the row, (2) number of non-numeric cells in the row, and (3) number of missing values in the row.

In the file Supplement1.csv each line within the predator, herbivore, and plant sections contains information for a species, if named in the original study. If not named, these data were generally lumped into a single category. Thus, a single study can be represented by several lines of data. Most analyses were done, as per the Methods section, on means across categories.

Text description, values, and units of factors from Supplement1.csv:

Factor  
Definition/Value
Plant Log Ratio  
ln(plant biomass with predators/plant biomass without predators). Values to calculate this were collected from the papers listed below under References to Studies.
Predator Name  
.
Predator taxonomy  
Vertebrate=1, Invertebrate=0
Predator thermal regulation  
Ectotherm=0, Endotherm=1
Predator mobility  
Sessile=0, Mobile=1
Predator feeding specialization  
Specialist=0, Consumes 1 trophic level=1, Omnivore=2
Predator size  
Estimated mean grams for species
Predator metabolism  
Average mass-specific metabolic rate (normalized by the production-biomass ratio of consumers, and therefore unitless) Invertebrate=0.1, Vertebrate-ecotherm=0.6, and Vertebrate-endotherm=2
Predator richness  
Number of species listed in study
Herbivore Name  
.
Herbivore taxonomy  
Vertebrate=1, Invertebrate=0
Herbivore thermal regulation  
Ectotherm=0, Endotherm=1
Herbivore mobility  
Sessile=0, Mobile=1
Herbivore metabolism  
Average mass-specific metabolic rate (normalized by the production-biomass ratio of consumers, and therefore unitless) Invertebrate=0.1, Vertebrate-ecotherm=0.6, and Vertebrate-endotherm=2
Herbivore richness  
Number of species listed in study
Plant Name  
.
Plant generation time  
Rapid=1, Weeks=10, Annual=365 days
Plant richness  
Number of species listed in study
Predator caging  
Uncaged=0, Caged=3
Experiment size  
Approximate square meters
Experiment duration  
Approximate days
Study duration/Plant generation time  
Approximate days/(Rapid=1, Weeks=10, Annual=365 days)

 

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