ReadMe for Predictive power of food web models based on body size decreases with trophic complexity by Jonsson T., Kaartinen R., Jonsson M. & Bommarco R.

2018-02-15

This readme file describes the data file accompanying the above publication.
For any further queries please contact tomas.jonsson@slu.se


The data file "Jonssonetal_EL2018_Expdata.csv" includes the experimental data of the study with number of individuals recorded of different species in different treatments. 

The data file is in comma-separated value (CSV) format, with each row reporting 
(1) treatment identity, 
(2) replicate number, 
(3) time since startup (h), 
(4) number of aphids (Rhopalosiphum padi),
(5) number of small carabids (Bembidion spp.), 
(6) number of small coccinellids (Adalia bipunctata),
(7) number of large coccinellids (Coccinella septempunctata),
(8) number of large carabids (Pterostichus melanarius)


Column headings are as follows with the following meaning of data entries: 

(1) Treatment: the experimental treatment (1: Control (= aphids only), 2: A. bipunctata + aphids, 3: C. septempunctata + aphids, 4: Bembidion spp. + aphids, 5: P. melanarius + aphids, 6: Coccinellids + aphids (= A. bipunctata + C. septempunctata + aphids), 7: Carabids + aphids (= Bembidion spp. + P. melanarius + aphids), 8: Small predators + aphids (= Bembidion spp. + A. bipunctata + aphids), 9: Large predators + aphids (= C. septempunctata + P. melanarius + aphids), 10: Small coccinellids  large carabids + aphids (= A. bipunctata + P. melanarius + aphids), 11: Small carabids  large coccinellids + aphids (= Bembidion spp. + C. septempunctata + aphids) and 12: All predators + aphids (=Bembidion spp. + A. bipunctata + C. septempunctata + P. melanarius + aphids)

(2) Replicate: id # of treatment replicate (from 1 to 12 for the control treatment and from 1 to 6 for all other treatments).

(3) Time: the time in hours since predator introduction.

(4) Aphids: number of aphids recorded. 

(5) Bembidion: number of Bembidion spp. individuals recorded. 
- denotes that this species was not present at all in this treatment and ? denotes that this species was present in this treatment but its abundance was not recorded at this time.

(6) Adalia: number of A. bipunctata. individuals recorded. 
- denotes that this species was not present at all in this treatment and ? denotes that this species was present in this treatment but its abundance was not recorded at this time.

(7) Coccinella: number of C. septempunctata individuals recorded. 
- denotes that this species was not present at all in this treatment and ? denotes that this species was present in this treatment but its abundance was not recorded at this time.

(8) Pterostichus: number of P. melanarius individuals recorded. 
- denotes that this species was not present at all in this treatment and ? denotes that this species was present in this treatment but its abundance was not recorded at this time

