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  • Authors Ameixa, O; Kindlmann, P
  • Author Full Name Ameixa, Olga; Kindlmann, Pavel
  • Title Agricultural policy-induced landscape changes: effects on carabid abundance and their biocontrol potential
  • Nationality nacional
  • Source EUROPEAN JOURNAL OF ENTOMOLOGY
  • Language English
  • Document Type Article
  • Author Keywords agricultural intensification; biocontrol; density; diversity; species richness; food webs; predatory pressure
  • Keywords Plus SMALL-SCALE HETEROGENEITY; CEREAL APHID CONTROL; CHERRY-OAT APHID; RHOPALOSIPHUM-PADI; BIOLOGICAL-CONTROL; POLYPHAGOUS PREDATORS; SPATIAL-DISTRIBUTION; BEETLES COLEOPTERA; FARMLAND BIRDS; HIGH-ALTITUDES
  • Abstract One of the most important services provided by biodiversity is thought to be the biological control of pests in agricultural landscapes, including aphids on cereals. The food webs potentially contributing to biological control of aphids primarily consist of polyphagous predators, parasitoids and pathogens. The problems of aphid pests have increased greatly since the 1970-ies, possibly as an effect of agricultural intensification, which is thought to have reduced diversity and abundance of these predators and parasites and consequently their biocontrol potential. The main objective Of this Study was to test this by measuring this potential for biological control of aphids, and relate it to agricultural intensification and predator abundance. We selected 30 farms distributed along agricultural intensification gradients, based on the amount of fertilizers applied per hectare. Estimates of ground-living predator density were obtained using pitfall trapping over a one-week period. Traps were placed inside the cereal fields, 10 in from the margin, in 2 replicates per field. Predation risk due to ground-living predators (biocontrol potential) was estimated by monitoring removal of aphids glued to labels. This was done in the same fields, in the immediate vicinity of the traps, over a period of 2 days. The proportion of aphids eaten per unit time was the response variable. We present the correlations between intensity of agricultural exploitation, predator abundance and biocontrol potential. The outcomes are not straightforward in that intensification begets a reduction in predator density and biocontrol potential. We discuss the potential confounding issues that might have affected Our results.
  • Author Address [Ameixa, Olga] Inst Syst Biol & Ecol AS CR, Dept Theoret Ecol, CZ-37005 Ceske Budejovice, Czech Republic; Univ S Bohemia, CZ-37005 Ceske Budejovice, Czech Republic
  • Reprint Address Ameixa, O (reprint author), Inst Syst Biol & Ecol AS CR, Dept Theoret Ecol, Branisovska 3, CZ-37005 Ceske Budejovice, Czech Republic.
  • E-mail Address olgameixa@portugalmail.pt
  • ResearcherID Number Ameixa, Olga/E-2297-2011; Kindlmann, Pavel/H-7718-2014
  • ORCID Number Ameixa, Olga/0000-0002-5422-1090;
  • Funding Agency and Grant Number GA CR [DIV/06/E013]; GA AV CR [A6087301]
  • Funding Text This research was supported by the grant No. DIV/06/E013 of the GA CR, grant No. LC06073 of the MSMT and by the grant No. A6087301 of the GA AV CR.
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  • Cited Reference Count 61
  • Times Cited 6
  • Total Times Cited Count (WoS, BCI, and CSCD) 6
  • Publisher CZECH ACAD SCI, INST ENTOMOLOGY
  • Publisher City CESKE BUDEJOVICE
  • Publisher Address BRANISOVSKA 31, CESKE BUDEJOVICE 370 05, CZECH REPUBLIC
  • ISSN 1210-5759
  • Character Source Abbreviation EUR J ENTOMOL
  • ISO Source Abbreviation Eur. J. Entomol.
  • Year Published 2008
  • Volume 105
  • Issue 3
  • Beginning Page 467
  • Ending Page 476
  • Page Count 10
  • Web of Science Category Entomology
  • Subject Category Entomology
  • Document Delivery Number 338ZC
  • Unique Article Identifier WOS:000258546900014
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