Abstract The act of converting prairie grassland to agricultural farmland has negative implications for pollinator communities. In the Prairie Pothole Region, wetland remnants are a common feature in intensively cultivated landscapes. These wetlands are typically small and often left embedded in the cropland matrix and may act as the only semi-natural feature in a radius of several hundred metres. To quantify the role that these in-field wetlands play in supporting native pollinators, we sampled bees at three distances from the wetland margin into the surrounding cropland (0 m, 25 m and 75 m) across the season in three field types (canola, cereal and perennial grassland). We used Bayesian multilevel models to test the hypothesis that native bees are using infield wetlands as habitat for nesting and foraging. Native bee abundance and diversity decreased further away from the margin of wetlands in both canola and cereal fields, while it increased in wetlands located in perennial grassland. Community composition did not change further away from wetlands, which may be because the foraging range of most species was within the sampling distance of the study. These results suggest that wetlands play an important role in providing critical resources for native pollinators, and encouraging farmers not to drain or plow through these wetlands will have beneficial impacts for native pollinators in the area. Maintaining in-field wetlands may have additional pollination benefits for farmers growing crops such as canola, which is known to benefit from insect visitors.

中文翻译：

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坑洼湿地为草原农田中的本地蜜蜂提供了水库栖息地

摘要 将草原草原转为农田的行为对传粉媒介群落具有负面影响。在草原坑洼地区，湿地遗迹是集约化耕作景观的共同特征。这些湿地通常很小，通常埋在农田基质中，可能是数百米半径内唯一的半自然特征。为了量化这些田间湿地在支持本地传粉媒介方面的作用，我们在整个季节从湿地边缘到周围农田（0 m、25 m 和 75 m）三个距离处的三种田地类型（油菜、油菜籽、谷类和多年生草地）。我们使用贝叶斯多级模型来检验本地蜜蜂使用内田湿地作为筑巢和觅食栖息地的假设。远离湿地边缘的本土蜜蜂丰度和多样性在双低油菜籽和谷类田中均呈下降趋势，而在位于多年生草地的湿地中则有所增加。远离湿地的群落组成没有发生变化，这可能是因为大多数物种的觅食范围在研究的采样距离内。这些结果表明，湿地在为本地传粉媒介提供关键资源方面发挥着重要作用，鼓励农民不要通过这些湿地排水或耕作，将对当地的本地传粉媒介产生有益影响。保持田间湿地可能会给种植油菜籽等作物的农民带来额外的授粉益处，众所周知，油菜籽可以从昆虫访客中受益。而在多年生草地湿地中则增加。远离湿地的群落组成没有发生变化，这可能是因为大多数物种的觅食范围在研究的采样距离内。这些结果表明，湿地在为本地传粉媒介提供关键资源方面发挥着重要作用，鼓励农民不要通过这些湿地排水或耕作，将对当地的本地传粉媒介产生有益影响。保持田间湿地可能会给种植油菜籽等作物的农民带来额外的授粉益处，众所周知，油菜籽可以从昆虫访客中受益。而在多年生草地湿地中则增加。远离湿地的群落组成没有发生变化，这可能是因为大多数物种的觅食范围在研究的采样距离内。这些结果表明，湿地在为本地传粉媒介提供关键资源方面发挥着重要作用，鼓励农民不要通过这些湿地排水或耕作，将对当地的本地传粉媒介产生有益影响。保持田间湿地可能会给种植油菜籽等作物的农民带来额外的授粉好处，众所周知，油菜籽可以从昆虫访客中受益。这些结果表明，湿地在为本地传粉媒介提供关键资源方面发挥着重要作用，鼓励农民不要通过这些湿地排水或耕作，将对当地的本地传粉媒介产生有益影响。保持田间湿地可能会给种植油菜籽等作物的农民带来额外的授粉益处，众所周知，油菜籽可以从昆虫访客中受益。这些结果表明，湿地在为本地传粉媒介提供关键资源方面发挥着重要作用，鼓励农民不要通过这些湿地排水或耕作，将对当地的本地传粉媒介产生有益影响。保持田间湿地可能会给种植油菜籽等作物的农民带来额外的授粉益处，众所周知，油菜籽可以从昆虫访客中受益。