Linear habitats across a range of farming intensities contribute differently to dipteran abundance and diversity,Insect Conservation and Diversity

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Linear habitats across a range of farming intensities contribute differently to dipteran abundance and diversity
Insect Conservation and Diversity ( IF 3.2 ) Pub Date : 2020-10-12 , DOI: 10.1111/icad.12455
Karzan S. D. Ahmed _{1,

2} , Alessio Volpato _{1,

2} , Michael F. Day _{1,

2} , Collette J. Mulkeen _{1,

2} , Aidan O'Hanlon _{1,

2} , John Carey ₃ , Christopher Williams ₄ , Sara Ruas ₅ , James Moran ₅ , Roser Rotchés‐Ribalta ₆ , Daire ÓhUallacháin ₆ , Jane C. Stout ₇ , Simon Hodge ₇ , Blanaid White ₈ , Michael J. Gormally _{1,

2}

Affiliation

While the value of linear farm habitats for the protection and enhancement of farmland biodiversity in general is known, less is understood about their contribution to Diptera, especially those with different ecological requirements. In this study, we examined the impact of a range of linear farm habitats in agricultural grassland on Syrphidae and Sciomyzidae (Diptera) both of which provide important ecosystem services.
Species richness and abundance for each family were measured across five different linear habitat types (dense and open hedgerows with/without adjacent watercourses and watercourses only). While dense hedgerows with adjacent watercourses showed the greatest numbers of Syrphidae species and individuals, open hedgerows with adjacent watercourses had significantly more Sciomyzidae species and individuals than dense hedgerows without watercourses or open hedgerows only.
Syrphidae species richness was significantly correlated with the flowering plant species richness of linear habitats, while Sciomyzidae species richness was correlated with a habitat quality score for grasslands adjacent to the linear habitats.
Overall, Syrphidae and Sciomyzidae species richness and community composition are shown to reflect a farming intensity gradient with significantly greater species richness for both families on extensive farms.
Our results suggest that different dipteran taxa which utilise linear habitats may have different requirements. This has implications for future agri‐environmental schemes in the context of how we assess the conservation value of linear habitats on farmlands.

中文翻译：

多种耕作强度的线性生境对二倍体丰富度和多样性的贡献不同

虽然人们普遍了解线性农场栖息地对于保护和增强农田生物多样性的价值，但人们对其线性双足动物的贡献，尤其是具有不同生态要求的双足动物的贡献知之甚少。在这项研究中，我们研究了农业草地上一系列线性农场生境对Syrphidae和Sciomyzidae（Diptera）的影响，二者均提供了重要的生态系统服务。
在五个不同的线性生境类型（只有/没有相邻水道和水道的密集和开放的树篱）中测量每个家庭的物种丰富度和丰度。虽然有相邻水道的密集树篱显示了Syrphidae物种和个体最多，但是与没有水道或仅有开放树篱的密集树篱相比，有相邻水道的开放树篱具有更多的Sciomyzidae物种和个体。
Syrphidae物种丰富度与线性生境的开花植物物种丰富度显着相关，而Sciomyzidae物种丰富度与线性生境相邻草地的栖息地质量得分相关。
总体而言，Syrphidae和Sciomyzidae的物种丰富度和群落组成显示出其耕作强度梯度，而这两个家庭在广泛的农场中的物种丰富度都明显更高。
我们的结果表明，利用线性生境的不同双足类群可能有不同的要求。在我们如何评估农田线性生境的保护价值的背景下，这对未来的农业环境计划产生了影响。

更新日期：2020-10-12

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