Season total densities of arthropods (total and individual groups) on caged & control branches in four vertical strata

Data from a 2007 field study in the Morgan Arboretum, Ste-Anne-de-Bellevue, Québec. Associated with a published paper (https://peerj.com/articles/138/). This dataset has 11 columns and 160 rows of data. Column titles: TRT = cage (caged branch) or control (no cage) Stratum = one of four vertical strata (UN = understory; LC = lower canopy; MC = mid canopy; UC = upper canopy) Rep = tree identity; 20 mature sugar maple trees were used, with control and caged branches in each stratum (i.e. 8 branches per tree) The next 8 columns contain the densities of the various groups on each branch. Note that density is provided as individuals per gram of dry leaf weight. ART = all arthropods combined Ara = spiders (Araneae) Col = beetles (Coleoptera) Der = earwigs (Dermaptera) Hem = true bugs (Hemiptera) Hym = ants, bees & wasps (Hymenoptera) Lep = caterpillars (Lepidoptera) Opi = harvestmen (Opiliones) Note that two branches contain NAs - the cages on these branches were lost during the study.