Description

This dataset contains ecological and environmental data collected from 25 green roofs in urban areas to investigate how roof characteristics and surrounding landscapes influence pollinator diversity, abundance, and functional traits. Data include pollinator species richness, abundance, and functional diversity, alongside roof-level variables (e.g., flower diversity, vegetation cover, microrelief, roof size, height, and age), landscape context, and weather conditions during sampling. Sampling was performed using pan traps and hand netting across multiple survey rounds.

File Information

File name: Data_daken_R.xlsx

Format: Excel workbook

Sheets Overview:

Overview: Summary of pollinator groups, total abundance, species richness, rare/abundant species counts.

Key columns:

Species_group – Taxonomic group (e.g., Anthophila, Syrphidae).

Abundance – Total individuals observed.

Species – Number of species recorded.

Rare_species, Abundant_species – Counts of rare or dominant species.

Soorten: Green roof characteristics and pollinator metrics per roof.

Key columns:

Dak – Roof name.

Flow_abund, Flow_div, Flow_div_spec – Flower abundance, Flower seasonality.

Poll_abund, Poll_spec – Pollinator abundance and species richness.

Sedum_spec, Sedum_perc – Sedum species count and percentage cover.

Groen in omgeving (in m2) – Area of surrounding green space.

Zonnepanelen – Presence of solar panels (Yes/No).

Microrelief – Structural variation (Geen/Matig/Veel).

Leeftijd dak – Roof age (years).

Type substraat – Substrate type (e.g., Aarde = natural soil, Sedumgrond = Sedum soil).

Hoogte vegetatie – Vegetation height (cm).

Bedekking vegetatie / Bedekking bloemen – % vegetation/flower cover.

Bijenhotel – Presence of bee hotel (Yes/No).

Watersysteem – Presence of irrigation (Yes/No).

Abund_total / Abund_R / Abund_ronde1–3: Pollinator abundance per sampling round.

Key columns: Roof name (Dak), city (Stad), sampling round (Ronde), floral metrics, pollinator counts, weather data (wind, temperature, sunshine, etc.).

Traits: Functional traits of pollinator species.

Key columns:

Species – Species code.

Parasitism, Feeding_pref, Sociality, Larvae_food, Nesting_site, Mobility – Trait categories coded as binary (0/1) or categorical (e.g., Solitary, Bovengronds/Untergronds).

Soorten_cor, Families, Func_div, Pres_absen_matrix, Matrix_NMDS, Weatherpan, Weathervisit, Contint_table, Blad1: Supporting data (e.g., corrected species data, family-level summaries, functional diversity matrices, presence/absence data, weather observations).

Codes and Symbols

Yes/No entries: Ja/Nee (Dutch for Yes/No).

Missing data: May be blank or coded as 0.

Trait codes: Binary (0/1) for presence/absence or categorical descriptors (e.g., Solitary, Ondergronds = underground nesting).

Roof names (Dak) correspond to individual sampling locations.

Data Types

Pollinator Data: Counts of individuals, species richness, diversity indices.

Roof Characteristics: Continuous (e.g., roof age, vegetation height), categorical (e.g., substrate type, microrelief).

Landscape Variables: Area of surrounding green space (m²), proximity measures.

Weather Data: Temperature (°C), wind speed, sunshine fraction.