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Statements

Subject Item
n2:RIV%2F67179843%3A_____%2F13%3A00392103%21RIV14-GA0-67179843
rdf:type
skos:Concept n10:Vysledek
dcterms:description
1 We investigated, over the course of 2 years, the spatial distribution and abundance of two species of aphid, Metopolophium dirhodum and Sitobion avenae, and predatory species of carabid. This was undertaken in 24 wheat fields in coarse-grain’ and finegrain’ landscapes in western France. A greater percentage of the latter landscape was covered by hedgerows and grassland and the total area covered by fields and the average size of the fields were smaller. 2 The effects on aphid abundance of the distance from field margins, the presence of grassy strips and carabid abundance were determined in both landscapes. 3 Both aphid species were more abundant in the fine-grain’ landscape, which may have been a result of the higher density of semi-natural elements. In both types of landscape, the total numbers of aphids were negatively correlated with the distance from the field margin. This may have been because aphids were dispersing from overwintering sites in field margins. The abundance of M. dirhodum was strongly negatively correlated with the presence of grassy strips in the coarsegrain’ landscape, although there were no such significant correlations for either of the aphid species in the fine-grain’ landscape. 4 Aphid and carabid abundances were negatively correlated in the fine-grain’ and positively in coarse-grain’ landscape. 5 The results obtained in the present study emphasize the importance of semi-natural areas in agricultural landscapes in shaping the spatial distribution of aphids and carabid beetles, their natural enemies, at different spatial scales. 1 We investigated, over the course of 2 years, the spatial distribution and abundance of two species of aphid, Metopolophium dirhodum and Sitobion avenae, and predatory species of carabid. This was undertaken in 24 wheat fields in coarse-grain’ and finegrain’ landscapes in western France. A greater percentage of the latter landscape was covered by hedgerows and grassland and the total area covered by fields and the average size of the fields were smaller. 2 The effects on aphid abundance of the distance from field margins, the presence of grassy strips and carabid abundance were determined in both landscapes. 3 Both aphid species were more abundant in the fine-grain’ landscape, which may have been a result of the higher density of semi-natural elements. In both types of landscape, the total numbers of aphids were negatively correlated with the distance from the field margin. This may have been because aphids were dispersing from overwintering sites in field margins. The abundance of M. dirhodum was strongly negatively correlated with the presence of grassy strips in the coarsegrain’ landscape, although there were no such significant correlations for either of the aphid species in the fine-grain’ landscape. 4 Aphid and carabid abundances were negatively correlated in the fine-grain’ and positively in coarse-grain’ landscape. 5 The results obtained in the present study emphasize the importance of semi-natural areas in agricultural landscapes in shaping the spatial distribution of aphids and carabid beetles, their natural enemies, at different spatial scales.
dcterms:title
Does the presence of grassy strips and landscape grain affect the spatial distribution of aphids and their carabid predators? Does the presence of grassy strips and landscape grain affect the spatial distribution of aphids and their carabid predators?
skos:prefLabel
Does the presence of grassy strips and landscape grain affect the spatial distribution of aphids and their carabid predators? Does the presence of grassy strips and landscape grain affect the spatial distribution of aphids and their carabid predators?
skos:notation
RIV/67179843:_____/13:00392103!RIV14-GA0-67179843
n10:predkladatel
n11:ico%3A67179843
n3:aktivita
n16:I n16:P
n3:aktivity
I, P(ED1.1.00/02.0073), P(GEVOL/11/E036)
n3:cisloPeriodika
1
n3:dodaniDat
n13:2014
n3:domaciTvurceVysledku
n17:2861119
n3:druhVysledku
n4:J
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
70287
n3:idVysledku
RIV/67179843:_____/13:00392103
n3:jazykVysledku
n15:eng
n3:klicovaSlova
Beneficial predators; biological control; Carabidae; cereal aphids; grassy strips; landscape structure
n3:klicoveSlovo
n6:landscape%20structure n6:biological%20control n6:Carabidae n6:grassy%20strips n6:cereal%20aphids n6:Beneficial%20predators
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[1F0E96AA261D]
n3:nazevZdroje
Agricultural and Forest Entomology
n3:obor
n14:EH
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
7
n3:projekt
n12:ED1.1.00%2F02.0073 n12:GEVOL%2F11%2FE036
n3:rokUplatneniVysledku
n13:2013
n3:svazekPeriodika
15
n3:tvurceVysledku
Hassan, D. A. Delattre, T. Plantengenest, M. Kindlmann, Pavel Burel, F. Butet, A. Georgelin, T.
n3:wos
000313885500003
s:issn
1461-9555
s:numberOfPages
10
n19:doi
10.1111/j.1461-9563.2012.00587.x