Influence of within-field and landscape factors on aphid predator populations in wheat

被引:106
作者
Elliott, NC [1 ]
Kieckhefer, RW [1 ]
Lee, JH [1 ]
French, BW [1 ]
机构
[1] ARS, USDA, Plant Sci Res Lab, Stillwater, OK 74075 USA
关键词
Coccinellidae; Aphididae; wheat; spatial scale; species diversity; numerical response;
D O I
10.1023/A:1008002528345
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
The influence of prey density, within-field vegetation, and the composition and patchiness of the surrounding landscape on the abundance of insect predators of cereal aphids was studied in wheat fields in eastern South Dakota, USA. Cereal aphids, aphid predators, and within-field vegetation were sampled in 104 fields over a three year period (1988-1990). The composition and patchiness of the landscape surrounding each field were determined from high altitude aerial photographs. Five landscape variables, aggregated at three spatial scales ranging from 2.6 km(2) to 581 km(2), were measured from aerial photographs. Regression models incorporating within-field and landscape variables accounted for 27-49% of the variance in aphid predator abundance in wheat fields. Aphid predator species richness and species diversity were also related to within-field and landscape variables. Some predators were strongly influenced by variability in the composition and patchiness of the landscape surrounding a field at a particular spatial scale while others responded to variability at all scales. Overall, predator abundance, species richness, and species diversity increased with increasing vegetational diversity in wheat fields and with increasing amounts of non-cultivated lands and increasing patchiness in the surrounding landscape.
引用
收藏
页码:239 / 252
页数:14
相关论文
共 48 条
[2]  
[Anonymous], 1996, ECOLOGY COCCINELLIDA
[3]  
[Anonymous], 1964, MATH THEORY COMMUNIC
[4]   OVIPOSITION AND NICHE PARTITIONING IN APHIDOPHAGOUS INSECTS ON MAIZE [J].
CODERRE, D ;
PROVENCHER, L ;
TOURNEUR, JC .
CANADIAN ENTOMOLOGIST, 1987, 119 (02) :195-203
[5]  
DAUBENMIRE R., 1959, NORTHWEST SCI, V33, P43
[6]  
Dillon W.R., 1984, MULTIVARIATE ANAL ME
[7]   POPULATION-MOVEMENTS OF ARTHROPODS BETWEEN NATURAL AND CULTIVATED AREAS [J].
DUELLI, P ;
STUDER, M ;
MARCHAND, I ;
JAKOB, S .
BIOLOGICAL CONSERVATION, 1990, 54 (03) :193-207
[8]  
Duelli P., 1988, P89
[9]   ECOLOGICAL PROCESSES THAT AFFECT POPULATIONS IN COMPLEX LANDSCAPES [J].
DUNNING, JB ;
DANIELSON, BJ ;
PULLIAM, HR .
OIKOS, 1992, 65 (01) :169-175
[10]   DYNAMICS OF APHIDOPHAGOUS COCCINELLID ASSEMBLAGES IN SMALL GRAIN FIELDS IN EASTERN SOUTH-DAKOTA [J].
ELLIOTT, NC ;
KIECKHEFER, RW .
ENVIRONMENTAL ENTOMOLOGY, 1990, 19 (05) :1320-1329