Przeglądanie według Autor "Butt, Kevin Richard"

Aktualnie wyświetlane 1 - 2 z 2

Development of a field-based earthworm mark-release-recapture technique for biomonitoring
(Uniwersytet Rzeszowski: Południowo-Wschodni Oddział Polskiego Towarzystwa Inżynierii Ekologicznej z siedzibą w Rzeszowie, 2017) Lowe, Christopher Nathan; Butt, Kevin Richard; Cheynier, Kevin
Biomonitoring in soil systems presents difficulties in retrieval and differentiation of test organisms from local populations. The aim of this study was to develop a simple method of in situ containment and efficient retrieval of earthworms. Visible Implant Elastomer (VIE) tags were used to identify earthworms Lumbricus rubellus and Aporrectodea caliginosa introduced to unpolluted pasture or a polluted site. Containment PVC tubes of different height (inserted differently into the soil and covered or not covered by a mesh) were used. Highest recovery rates for both species came from use of 0.3 m tubes (100% for A. caliginosa and 71% for L. rubellus). This study confirmed the feasibility of using VIE tags to identify and aid recovery of introduced earthworms from field experiments. Results suggested that recovery rates were influenced by behavioural differences in ecological groupings and site-specific factors. There is scope for further improvement in the tagging procedure, mortality assessment and investigation of containment for earthworms.
Sustainability of earthworm communities in translocated grasslands: the first decade after runway 2 construction at Manchester airport
(Uniwersytet Rzeszowski: Południowo-Wschodni Oddział Polskiego Towarzystwa Inżynierii Ekologicznej z siedzibą w Rzeszowie; Polskie Towarzystwo Gleboznawcze Oddział w Rzeszowie, 2015) Butt, Kevin Richard; Walmsley, Tim
Construction of a second runway at Manchester Airport led to a £17 million environmental mitigation package concerned with habitat restoration, relocation of species and translocation of valuable habitat components. One major concern was for legally protected vertebrate species (Meles meles and Triturus cristatus) affected by these works. To this end, a monitoring programme was established to assess earthworm communities (potential prey for the protected animals) within areas of translocated grassland. Major upheaval of soils can have negative consequences on soil biota, so integration of translocated turf with receptor subsoil was essential. The work reported here relates to continued monitoring of 4 specific translocated grassland areas. Digging and hand sorting of soil from replicated plots of 0.1 m2, followed by vermifuge (mustard) application was used to extract earthworms. Monitoring took place on an annual basis during the same week of October from 1998-2007. Twelve species of earthworm were located, representing three ecological groups. Recorded densities ranged from 4 to 427 earthworms m-2. Similarly, biomasses ranged between 2 and 110 g m-2. Significant differences can be ascribed to type of translocation undertaken (turf transfer or soil alone) and also between grassland sites (low lying, slopes, hillocks) and across years. Meteorological data suggests that the most significant environmental aspect during the decade of monitoring was rainfall, having its greatest negative effect on earthworms in 2003. Earthworm community composition has been dynamic over this time period.