Individual study: The potential of Integrated Constructed Wetlands (ICWs) to enhance macroinvertebrate diversity in agricultural landscapes
Jurado G.B., Johnson J., Feeley H., Harrington R. & Kelly-Quinn M. (2010) The potential of Integrated Constructed Wetlands (ICWs) to enhance macroinvertebrate diversity in agricultural landscapes. Wetlands, 30, 393-404
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Create scrapes and pools
A replicated site comparison study in 2006 of five recently developed Integrated Constructed Wetlands in a catchment in Ireland (Jurado et al. 2010) found that the total number of macroinvertebrate taxa and beetle (Coleoptera) taxa did not differ between Integrated Constructed Wetlands and natural ponds, although communities did differ. A total of 134 taxa were found in Integrated Constructed Wetland ponds, 116 of which were in the last pond, compared to 129 taxa in natural ponds. Although taxon richness and beetle richness did not differ between natural and Integrated Constructed Wetland ponds, overall communities and beetle communities differed significantly. There were 151 taxa with the two pond types, of which 92 taxa (61%) were common to both types of ponds, 35 (23%) were found only in natural ponds and 24 (16%) only in Integrated Constructed Wetland ponds. There was no significant difference between the numbers of taxa in Integrated Constructed Wetlands and the river sites. Of 169 total taxa, 53 (31%) were found in both sites, 64 (38%) in only Integrated Constructed Wetlands and 52 (31%) only at river sites. Five Integrated Constructed Wetlands (consisting of interconnected ponds) and five natural ponds within pasture were sampled in March-April and July-August 2006. Sampling involved three, 3-minute multi-habitat net samples (mesh: 1 mm) and 10 horizontal activity traps in each of the different pond habitats (ponds >10 cm deep). Nine sites on Annestown River, upstream and/or downstream of discharges from the final Integrated Constructed Wetlands were also sampled. Two, 3-minute multi-habitat kick samples were collected (mesh: 0.5 mm) in each of the different river habitats (mesohabitats).