The within-field spatial and temporal distribution of arthropods in winter wheat

摘要: The within-field spatial distribution of some common farmland arthropods from the Carabidae, Araneae and Collembola was assessed using two-dimensional grids pitfall traps distributed across whole winter wheat fields. In first year, extent to which arthropod capture influenced by location within field sampling intensity examined a nested grid design (1.5 m, 7.5 m 30 spacings). second distributions two different-sized fields were compared. Spatial pattern association between weed cover analysed SADIE trend surfaces used visualize distributions. Many these groups exhibited aggregated in clusters larger than across, demonstrating that numbers captured will vary depending on field. Amara species, Bembidion lampros Herbst, Carabidae Lycosidae predominantly found 60 edge. Nebria brevicollis Fabricius Pterostichus madidus Illiger patches one hectares, respectively. Linyphiidae relatively homogeneously There evidence clustering Collembola. spermophagous positively associated with degree cover. analytical techniques useful for identifying importance greater less average numbers, although minimum 36 sample points is recommended.