Sampling
To investigate the effects of invasive ginger, we laid 5 transects in the native mesic forest habitat of the Waikamoi Preserve and 5 transects in ginger-invaded habitat of the Makawao Forest Reserve (See S2 in Supplemental Information; see Data Accessibility for coordinates). Each transect ran 30 meters long and was 3 meters in width. Spiders were collected along transects between June 8 to June 21 in 2017 using vegetation beat sampling. Each transect was broken into 3 blocks, each 10 meters in length, creating a total of 30 sampling units. Vegetation along transects was sampled using a beat sheet for 5 seconds. Fifteen units of vegetation were beaten in each block of each transect. Combined transect and block are used as “sites” throughout the paper. Spiders were collected from the beat and preserved in 100% EtOH in individual 2mL vials. Samples were stored in a -20 freezer until further use.