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.