Figure 4
From: Applications of unmanned aerial vehicles in intertidal reef monitoring
Distance-based redundancy analysis (dbRDA) ordination describing the relationship between UAV derived environmental variables and (a) algal percentage cover, and (b) invertebrate abundances from on-ground quadrat DistLM classified by site. Vectors depict the effect of environmental variables influencing presence of algae and invertebrates, with length of vector representing the strength of effect. Axes show percentage of variation: (a) elevation (dbRDA1) and distance to seaward reef edge (dbRDA2), and (b) distance to seaward reef edge (dbRDA1) and elevation (dbRDA2). Sites: (PP = Pickering Point, SB = Shelly Beach, PL = Point Lonsdale, CB = Cheviot Beach, RP = Ricketts Point, HB = Halfmoon Bay, MR = Mushroom Reef, WF = West Flinders); Park (MPA = closed, reference = open).
