UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Consequences of pond management for chironomid assemblages and diversity in English farmland ponds

Axmacher, JC; Sayer, CD; Greaves, HM; Ruse, LP; (2018) Consequences of pond management for chironomid assemblages and diversity in English farmland ponds. Journal of Limnology , 77 (S1) pp. 160-168. 10.4081/jlimnol.2018.1789. Green open access

[thumbnail of Pond Chironomids J Lim.pdf]
Preview
Text
Pond Chironomids J Lim.pdf - Published Version

Download (475kB) | Preview

Abstract

Ponds represent a large potential resource for biodiversity in agricultural areas of lowland Europe though many are lost through natural succession towards damp woodland depressions (terrestrialisation). Managing ponds back towards their former open-water state may result in dramatic increases of biodiversity, even on heavily farmed land. Here, evidence is presented of the effects of terrestrialised farmland pond restoration on chironomid assemblages. Chironomid pupal exuviae were collected from three terrestrialised ponds on intensively-farmed land in North Norfolk, Eastern England. Two of the ponds had trees, scrub and sediment removed, while the third pond remained undisturbed as a control. Pupal exuviae collection resumed after the restoration period. In addition, nine unmanaged farm ponds and two formerly restored ponds were sampled. Nearby, another five restored ponds were also sampled for chironomid pupal exuviae. Water data revealed alkalinity, conductivity and phosphorus decreased while pH and dissolved oxygen increased after pond restoration. Chironomid species diversity, similarity and species compositional change were compared pre- and post-restoration. Assessments were made of chironomid species associated with colonisation of restored ponds as well as ponds without such management. After scrub and sediment removal the earliest colonisation of the ponds was by mud-eating species with rapid colonisation traits such as parthenogenesis, multiple generations in one year and tolerance of low oxygen conditions. Subsequent plant growth due to the opening up of the canopy led to consequent improved oxygenation and habitat structure. Other chironomid species dependent on these conditions were then able to compete with the early colonisers. Restoration also made a significant improvement in the number of chironomid species, as assessed by rarefaction curves.

Type: Article
Title: Consequences of pond management for chironomid assemblages and diversity in English farmland ponds
Open access status: An open access version is available from UCL Discovery
DOI: 10.4081/jlimnol.2018.1789
Publisher version: https://doi.org/10.4081/jlimnol.2018.1789
Language: English
Additional information: This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Keywords: Pond restoration, Chironomidae, Pupal exuviae, Farmland, Biodiversity
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Dept of Geography
URI: https://discovery.ucl.ac.uk/id/eprint/10062671
Downloads since deposit
69Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item