model5: Multidiversity model 5

In yclough/ecodeal: Functions for economic-ecological analyses of agricultural landscapes

Description

A model estimating multidiversity from a range of landscape descriptors. Multidiversity was calculated as follows: For each taxonomic group (plants, bees, butterflies, hoverflies, carabids, spiders and birds), we calculated species richness at the landscape level, i.e. across all three sampling sites and across all visits when multiple survey visits were conducted. We standardized species richness for each taxonomic group by centering species richness on its mean and scaling it based on its standard deviation across all regions. We then calculated the average standardized species richness across all seven taxonomic groups (Sirami et al. in prep).

Usage

model5

Format

A model with a response and six explanatory variables:

Response

Multidiversity, defined as the average standardized species richness across seven taxonomic groups

Crop_SHDI

Crop diversity, using the Shannon diversity index

Crop_MFS

Crop mean field size, in hectares

Seminat_Cover

proportion seminatural habitat cover in the landscape

sampled.crop.nb

number of crops sampled

Region

Factor indicating the study region

Year

Sampling year, 2013 or 2014

...

Source

http://www.farmland-biodiversity.org/

yclough/ecodeal documentation built on May 14, 2019, 2:01 a.m.