Data used for caclulation of beta diversity of predators diets in: Diversified cropping strengthens herbivore regulation by providing seasonal resource continuity to predators 

We studied the beta diveristy of carabid predators present in the same field, and in subseuent time steps in the season. In 2020. we sampled 19 arable fields, and calculated the diet turnover of the shared predator species between first and second, as well as second and thrid sampling session. First sampling session corresponds to tillering, second sampling session to heading and thrid sampling session to ripening of the crop. Overall beta diveristy was further decomposed into turnover and richness components.


The data in the 'Data_submission_BetaDiv_dietTurnover.csv' file contains information on the assessed diet turnover of predators between subsequent time steps ('session.comp'), comparing the diet of predators between session 1 and 2 ('1_2') or two and three (2_3). Diet turnover was based on only the shared predators between time steps. For further information, and exact calculation of beta diversity components, see methods in the publication Heinen et al. (2024) 'Diversified cropping strengthens herbivore regulation by providing seasonal resource continuity to predators'. Journal of Applied Ecology.


field:		ID for each of the 19 fields

session.comp:	Identifier for the comparisson of diet between sampling one and two ('1_2') or two and three ('2_3')

predator.ID:	Species name of the shared predator asessed

B15:		Overall diet turnover

B3:		Turnover component of diet turnover

B_rich:		Richness component of diet turnover

treatment:	Three treatments. 'FminRa'= fields treated with mineral fertiliser and annual crop rotations; 'ForgRa'= fields treated with organic fertiliser and annual crop rotations; 'ForgRl'= fields treated with organic fertiliser and three years of ley in the crop rotation.