1. Farmland habitats comprise an arrangement of cropped, uncropped and natural vegetation among the farms. Despite the differences in these habitats' features, generalist highly mobile predators are more likely to explore them in time and space.
2. We investigated the spatiotemporal dynamics of the species of Dolichopodidae (Diptera) in organic vegetable farms because they are one of the most abundant generalist highly mobile predators in Brazilian agroecosystems.
3. We simultaneously sampled the abundance of Condylostylus Bigot and Chrysotus Loew adults (both Dolichopodidae) in the crop, fallow areas, agroforests and forest fragments within five organic farms for 2 years.
4. Predators preferred open-field habitats to agroforests and forest fragments. Probably, open-field habitats present more opportunities to prey foraging, resulting in higher population densities.
5. To the extent that abiotic conditions become more restrictive during the dry season, agroforests and forests act as breeding sites and shelter, thereby maintaining the predators' populations in the overall farmland habitat.
6. Both predatory genera occupy habitats with distinct features across time, forming a dynamic and contiguous population unit within the farm. Therefore, conservation biological control strategies in organic crops should consider the role of agroforests and forest fragments in species conservation beyond the plot level.

中文翻译：

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不同农田生境活动双翅目捕食者的时空动态

1. 农田栖息地包括农场中已种植、未种植和天然植被的排列。尽管这些栖息地的特征存在差异，但高度机动的多面手捕食者更有可能在时间和空间上探索它们。
2. 我们调查了有机蔬菜农场中 Dolichopodidae (双翅目) 物种的时空动态，因为它们是巴西农业生态系统中最丰富的多面性高移动捕食者之一。
3. 我们同时取样的丰度Condylostylus比戈和Chrysotus勒夫成年人（包括长足虻科）在作物，休闲区，agroforests和森林片段在五年内的有机农场2年。
4. 捕食者更喜欢露天栖息地，而不是农林和森林碎片。可能，露天栖息地提供了更多猎物觅食的机会，从而导致更高的人口密度。
5. 在旱季非生物条件变得更加严格的情况下，农林和森林充当繁殖地和庇护所，从而在整个农田栖息地中维持捕食者的种群。
6. 两个掠食性属都占据了具有不同时间特征的栖息地，在农场内形成了一个动态且连续的种群单元。因此，有机作物的保护性生物控制策略应考虑农林和森林碎片在地块层面以外的物种保护中的作用。