quantitative-conservation-lab / delap_etal_inreview_twosuburbs

This is a repository for code and data for an in-review manuscript on the effects of suburban development on bird communities.

A tale of two suburbs: influence of new residential construction varying in housing density on bird species, human tolerance guilds, and communities

Jack H DeLap, John M. Marzluff, and Sarah J Converse

Please contact the first author for questions about the code or data: Jack DeLap ([email protected])

Secondary contact: Sarah Converse ([email protected])

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Abstract

Human population growth and changing settlement patterns fuel the development of urban fringe lands worldwide, with implications for biodiversity. We conducted a 12-year study of birds in the fast-developing urban fringe lands of the Central Puget Sound region, Washington, USA, to examine the effect of development configuration on birds, including human-tolerance guilds and individual species. We hypothesized that lower-intensity conservation developments (CDs), compared to higher-intensity planned community developments (PCDs), would benefit the overall bird community, as well as native forest birds (avoiders of human development) and avian generalist species (adapters to human development), but that PCDs would benefit synanthropic species (exploiters of human development). Consistent with these hypotheses, we observed a greater proportion of the overall community, avoiders, and adapters in CDs, while we observed a greater proportion of exploiters in PCDs. We also hypothesized that human tolerance guilds would be a useful but imperfect, predictor of individual species responses. This hypothesis was also supported: we found that, for avoiders, 94% of species in the guild had the same response as the overall guild; for adapters, 64%; and for exploiters, 56%. Our results indicate that the configuration of suburban developments can have a meaningful impact on bird communities.

Table of Contents

Folders include scripts, data, results, and figures. See files listed below.

Scripts

analysis.R

plotting_code_spp.R

plotting_code_guilds.R

Data

Bird_Data.csv

Results

spp.1.57.v2.RData

allSpp_AIC.RData

allBoots_15April.RData

Figures

Adaptor_Figure.png

Avoider_Figure.png

Exploiter_Figure.png

Guilds_Figure.png

Required Packages and Versions Used

here (v1.0.1)

tidyr (v1.3.0)

lme4 (v1.1.33)

stringr (v1.5.0)

ggplot2 (v3.4.2)

ggpub4 (v0.6.0)

viridis (v0.6.3)

Details of Article

DeLap JH, JM Marzluff, and SJ Converse. In Review. A tale of two suburbs: influence of new residential construction varying in housing density on bird species, human tolerance guilds, and communities.

How to Use this Repository

Run analysis code first, which will create several data objects that can be subsequently run to create figures. Run time for all analyses is >24 hours.