Dataset DOI: 10.5061/dryad.cvdncjtjs

Description of the data and file structure

This dataset contains cleaned data tables, derived figure datasets, and code associated with the study "Persistence without prosperity at the upper range margin: elevation, microhabitat buffering, and biotic pressure in the expanding spider Cheiracanthium punctorium," submitted to Ecological Entomology.

FILE OVERVIEW

The file README.txt contains additional context. Many CSV files have an associated "dictionary" file with information about variable names, descriptions, and metadata.

Primary datasets:

• site_level_data.csv: Site-level environmental and abundance data.
• site_year_data.csv: Site-by-year dataset used for occurrence and abundance analyses.
• cocoon_individual_data.csv: Individual cocoon-level data including cocoon height, plant height, elevation, month, and site information.
• parasitoid_data.csv: Parasitoid emergence dataset.
• predator_data.csv: Cocoon condition and predator/associate dataset.

Derived figure datasets:

• fig3_site_year_data.csv: Site-year data used for Fig. 3 panels involving occupancy, abundance, moisture, and road adjacency.
• fig3_cocoon_data.csv: Cocoon-level data used for Fig. 3 panels involving cocoon height, plant height, and relative cocoon position.
• fig4_distance_to_road_data.csv: Cocoon-bearing plant distance-to-road data used for Fig. 4.
• fig5_parasitism_data.csv: Parasitoid count and parasitism data used for Fig. 5.
• fig6_predator_damage_data.csv: Cocoon damage and predator/associate data used for Fig. 6.

Key derived variables:

• parasitized: 1 if Parasitoid_Count > 0, otherwise 0.
• Relative_Cocoon_Position: Cocoon_Height_Cm / Plant_Height_Cm.
• damaged: 1 for lateral/apical breach or broad basal opening, 0 for intact cocoons.
• Predator_Associate_Present: 1 if any recorded predator/associate taxon was present.
• Ant_Present: 1 if Formica rufa or Lasius fuliginosus was present.
• condition: cocoon condition category: intact, Lateral_Apical_Breach, or Broad_Basal_Opening.

Missing values:

Missing values are encoded as blank fields/NA.

Software:

Analyses and figures were prepared in Python using pandas, numpy, matplotlib, scipy, and statsmodels.

ANALYSIS AND SOFTWARE FILES

• analysis_and_figures.py

Python analysis manifest describing the relationships among deposited datasets, derived figure datasets, dictionaries, and manuscript figures.

• requirements.txt

Python package requirements for reproducing the analyses and figures.

Notes:

Site identifiers correspond to those used in the manuscript. Elevation is reported in metres above sea level (m a.s.l.). Cocoon and plant heights are reported in centimetres.