Comparison of recruitment dynamics in five intertidal marine invertebrates following mass mortality along the northeastern Pacific coastline in 2005 (CHIPS project)

Twenty accessible rocky intertidal sites were selected to span the ‘kill-zone’ and peripheral locations (see list of sites in Schiebelhut et al. in prep; see also Jurgens et al. 2015). Two rocky intertidal areas were sampled per site, usually one on either side of the point of entry onto the beach and separated by approximately 100 m. We used quadrats (1m2 [4 * 0.25 m^2] or 0.0625 m^2) and swaths (2 m wide transects) to estimate juvenile and adult abundance for each target species.

This data set includes counts of Pisaster ochraceus, Cryptochiton stelleri and Leptasterias sp. in quadrats and swaths along the California coast from 37.9 N to 38.9 N.

The CHlPS-02 dataset has some overlap with the CHlPS-01 dataset. Data that share the same location and date represent the same collections. In the CHlPS-01 dataset from Jurgens et al. (2015), the datum presented is the sum of individuals across life-stages and across areas-within-site for each species. In the CHlPS-02 dataset from Schiebelhut et al., the data presented are the total counts within life-stage (recruit or adult) and within-area-within-site for each species. Thus, for example, for Arena Cove on 02 December 2013, the CHlPS-01 dataset states there were 44 Henricia; the CHlPS-02 dataset states there were 6 recruits plus 4 adults in Area 1 and 15 recruits plus 19 adults in Area 2.