Exclude wild invertebrates using physical barriers
Overall effectiveness category No evidence found (no assessment)
Number of studies: 0
Background information and definitions
Although invertebrates such as insects, spiders, crabs and molluscs are an important part of marsh and swamp ecosystems, they can become problematic where they are introduced and/or become abundant. Invertebrates could be excluded from vegetation patches using mesh cages, or from individual plants using sticky materials painted on to stems.
We have not summarized the numerous fundamental studies testing the effects of invertebrate exclusion or removal on existing marsh or swamp vegetation: it is not clear that such small-scale manipulations are realistic practical conservation interventions. Many of these studies have demonstrated substantial effects, both direct and indirect, of invertebrates on vegetation (e.g. Tyrell et al. 2008; Bertness et al. 2014).
Related interventions: Exclude wild vertebrates using physical barriers (freshwater marshes – brackish/salt marshes – freshwater swamps – brackish/saline swamps); Use fences or barriers to protect planted areas (freshwater non-woody – brackish/saline non-woody – freshwater trees/shrubs – brackish/saline trees/shrubs).
Bertness M.D., Brisson C.P., Coverdale T.C., Bevil M.C., Crotty S.M. & Suglia E.R. (2014) Experimental predator removal causes rapid salt marsh die-off. Ecology Letters, 17, 830–835.
Tyrell M.C., Dionne M. & Edgerly J.A. (2008) Physical factors mediate effects of grazing by a non-indigenous snail species on saltmarsh cordgrass (Spartina alterniflora) in New England marshes. ICES Journal of Marine Science, 65, 746–752.