Management scale drives bee and forb biodiversity patterns in suburban green spaces

Land management can occur at very small scales, such as in individual home gardens, and at very large scales, such as at the municipal scale or beyond. The scale of management can affect environmental heterogeneity and thus can affect biodiversity at alpha, beta, and gamma scales. Urban areas provide a unique opportunity to evaluate the effects of large- versus small-scale land management on different scales of biodiversity. We surveyed floral resources and bees in residential backyards and powerline corridors in the Chicago suburbs, with yards representing small-scale management and powerline corridors representing large-scale management. We calculated alpha diversity, beta diversity, and gamma diversity for both floral and bee species. We also determined absolute nestedness for corridors and neighborhoods to gain further insight into the effects of management on species composition. We found that beta diversity for both floral resources and bees was highest in response to small-scale ..., Data were collected in 5m X 5m sampling modules in powerline corridors and residential backyards. Floral resource surveys were conducted by a single observer who counted all open/blooming floral units visible within the sampling module and identified them to the lowest possible taxonomic level. Timed pollinator observations were conducted by a single observer who spent 5 minutes observing each half of the sampling module, counting any visible bees in the module during that time and identifying them to the lowest possible taxonomic level. Bee bowls were set out for ~24 hours in arrays of 6 bowls laid in a diagonal transect within each sampling module. Each bee bowl transect included 2 white, blue, and yellow bowls, and no two bowls of the same color were placed immediately adjacent to one another in the transect. Bowls were filled with a dilute soap solution. Bees captured in bee bowls were stored in 70% ethanol until lab processing, at which point they were washed, rinsed, dried, and id..., , # Management scale drives bee and forb biodiversity patterns in suburban green spaces

[https://doi.org/10.5061/dryad.m0cfxppd9](https://doi.org/10.5061/dryad.m0cfxppd9)

## Description of the data and file structure

Files include data for floral resource surveys and bee surveys (collected via both Pollard walks and pan traps) as well as an R-markdown file of the code used to analyze the data.

### Files and variables

#### File: Hosler\_21\_Plants.xlsx

**Description:** Floral resource data by site for 2021.

##### Variables

* Code: The alphanumeric code for each sampling module: the first 2 letters indicate one of the four clusters (CL=Crystal Lake, GH=Glendale Heights, MG=Morton Grove, WR=Woodridge); the 3rd letter indicates the site type (P=Prairie, M=Mown, O=Oldfield); the 4th letter indicates the management type (C=Corridor, R=Residential); the number(s) indicates which sampling module within that site

#### File: Hosler\_22\_Plants.xlsx

**Description:** Floral resource data by...