A seaweed increases ecosystem multifunctionality when invading bare mudflats
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One of the most successful marine invaders worldwide is the seaweed Gracilaria vermiculophylla (Gulbransen et al. 2013; Hu and Juan 2014; Thomsen et al. 2016b). A highly variable abundance of Gracilaria in many different invaded habitats and bioregions has motivated researchers to quantify impacts on a variety of ecological response variables (Gulbransen and McGlathery 2013; Thomsen et al. 2013; Davoult et al. 2017). Ramus et al. ( 2017) therefore used a manipulative field experiment to test for density-dependent effects of Gracilaria on 11 ecosystem functions (see Fig. 1 for a description of the functions). From their experiment and analyses, Ramus et al. concluded that in comparison to bare mudflats, Gracilaria increases multiple ecosystem functions (Figs. 2H and S2E in Ramus et al. 2017).
KeywordsBiodiversity Ecosystem engineer Ecosystem functioning Experimental designs Facilitation Foundation species Gracilaria vermiculophylla
We thank two reviewers for comments that improved this manuscript.
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