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The taxon‐ and functional trait‐dependent effects of field margin and landscape composition on predatory arthropods in wheat fields of the North China Plain
Insect Conservation and Diversity ( IF 3.2 ) Pub Date : 2020-02-12 , DOI: 10.1111/icad.12403 Xuzhu Zhang 1 , Jan C. Axmacher 2 , Panlong Wu 1 , Xiao Song 1 , Zhenrong Yu 1 , Yunhui Liu 1
中文翻译：
华北平原麦田的田间边缘和景观组成对捕食性节肢动物的分类和功能性状依赖效应
更新日期：2020-02-12
Insect Conservation and Diversity ( IF 3.2 ) Pub Date : 2020-02-12 , DOI: 10.1111/icad.12403 Xuzhu Zhang 1 , Jan C. Axmacher 2 , Panlong Wu 1 , Xiao Song 1 , Zhenrong Yu 1 , Yunhui Liu 1
Affiliation
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- Semi‐natural habitats are regularly shown to affect the diversity of predatory invertebrates at both local and landscape scales. In this study, we investigated the effects of three different vegetated field margins and the surrounding landscape composition on two common natural enemy taxa, carabids and spiders, in wheat fields of the North China Plain.
- Carabids and spiders were sampled using pitfall traps located at 36 wheat fields near three different field margin types – grassy strip, poplar woodland and unvegetated pathway.
- In‐field diversity of carabids and spiders was not significantly differentiated by field margin type while species richness of total carabids and abundance of small spiders increased with increasing field margin width, and the abundance of adult spiders, ground hunting spiders, small and medium‐sized spiders decreased with increasing distance to the field margin.
- At the landscape scale, the abundance of all and large carabids was positively correlated with % woodland, while abundances of all and small carabids were negatively correlated with % grassy area. The abundance of spiders was positively related to % grassy area, while the links between % woodland and adult spider abundance in the fields varied between field margin types.
- Our results indicated that natural enemies showed diverging, taxon‐ and functional group‐specific links to semi‐natural habitats at both local and landscape scales. Both the creation of mixtures between woodlands and grasslands across agricultural landscapes and an increase in field margin width are identified as efficient measures to promote carabid and spider diversity.
中文翻译：
华北平原麦田的田间边缘和景观组成对捕食性节肢动物的分类和功能性状依赖效应
- 定期显示半自然生境会影响本地和景观尺度上的捕食性无脊椎动物的多样性。在这项研究中，我们调查了华北平原麦田中三种不同的植被场边缘和周围景观构成对两种常见的天敌分类群（甲壳类和蜘蛛类）的影响。
- 使用位于三个不同田间边缘类型（草地带，白杨林地和无植被路径）附近的36个麦田的陷阱陷阱对钩锁和蜘蛛取样。
- 甲缘和蜘蛛的田间多样性没有通过田间边缘类型明显区分，而总甲壳类的物种丰富度和小型蜘蛛的丰度随着田间边缘宽度的增加而增加，而成年蜘蛛，猎地蜘蛛，中小型蜘蛛的丰富度蜘蛛随着到野外边缘距离的增加而减少。
- 在景观尺度上，所有和大型锁甲的丰度与林地的百分比呈正相关，而所有和小型锁甲的丰度与草地面积的百分比呈负相关。蜘蛛的丰度与草地面积百分比呈正相关，而田间林地百分比与成年蜘蛛的丰度之间的联系因田间边缘类型而异。
- 我们的结果表明，天敌在局部和景观尺度上都显示出与半自然生境的不同，分类和功能特定的联系。跨农业景观在林地和草地之间形成混合物以及增加田间边界宽度都被认为是促进腕带和蜘蛛多样性的有效措施。
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