The relative importance of green infrastructure as refuge habitat for pollinators increases with local land‐use intensity

Li, Pengyao; Kleijn, David; Badenhausser, Isabelle; Zaragoza‐Trello, Carlos; Gross, Nicolas; Raemakers, Ivo; Scheper, Jeroen

doi:10.1111/1365-2664.13658

Cited by 25 publications

(18 citation statements)

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“…While different types of seminatural habitats serve as potential source habitats, it is unclear how much and which types of source habitats are needed. AES were previously found to be especially effective in landscapes with few remaining seminatural habitats (32,33).…”

Section: How Effective Are Flowering Fields In Different Agriculturalmentioning

confidence: 99%

A multitaxa assessment of the effectiveness of agri-environmental schemes for biodiversity management

Boetzl

Krauß

Heinze

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

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Agri-environmental schemes (AES) aim to restore biodiversity and biodiversity-mediated ecosystem services in landscapes impoverished by modern agriculture. However, a systematic, empirical evaluation of different AES types across multiple taxa and functional groups is missing. Within one orthogonal design, we studied sown flowering AES types with different temporal continuity, size, and landscape context and used calcareous grasslands as seminatural reference habitat. We measured species richness of 12 taxonomic groups (vascular plants, cicadas, orthopterans, bees, butterflies, moths, hoverflies, flower visiting beetles, parasitoid wasps, carabid beetles, staphylinid beetles, and birds) representing 5 trophic levels. A total of 54,955 specimens were identified using traditional taxonomic methods, and bulk arthropod samples were identified through DNA metabarcoding, resulting in a total of 1,077 and 2,110 taxa, respectively. Species richness of most taxonomic groups, as well as multidiversity and richness of pollinators, increased with temporal continuity of AES types. Some groups responded to size and landscape context, but multidiversity and richness of pollinators and natural enemies were not affected. AES flowering fields supported different species assemblages than calcareous grasslands, but assemblages became more similar to those in seminatural grasslands with increasing temporal continuity. Our results indicate that AES flowering fields and seminatural grasslands function synergistically. Flowering fields support biodiversity even when they are relatively small and in landscapes with few remaining seminatural habitats. We therefore recommend a network of smaller, temporally continuous AES flowering fields of different ages, combined with permanent seminatural grasslands, to maximize benefits for biodiversity conservation and ecosystem service delivery in agricultural landscapes.

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Section: How Effective Are Flowering Fields In Different Agriculturalmentioning

confidence: 99%

A multitaxa assessment of the effectiveness of agri-environmental schemes for biodiversity management

Boetzl

Krauß

Heinze

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

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“…Hoverflies are increasingly viewed as an extremely important group of model organisms with remarkable ecological and cultural value as pollinators (Jauker & Wolters 2008;Doyle et al 2020) and biological control agents (Grosskopf 2005;Day et al 2015), and they have been the focus of diverse ecological studies. Considerable effort has been devoted to investigating how hoverflies respond to the biggest environmental challenges worldwide, such as intensive agriculture (Li et al 2020), urbanization (Persson et al 2020), climate change (Miliči c et al 2018), and invasive species (Davis et al 2018;Szigeti et al 2020). However, the majority of past research has explored links between hoverfly species richness, abundance and/or distribution patterns, and environmental conditions, but very few studies have considered evaluating hoverfly functional groups (Schweiger et al 2007;Keil et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Functional groups of hoverflies in Southeast Europe across different vegetation types

Miličić

Popov

Jurca

et al. 2021

Entomological Science

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To better understand the relationship between biodiversity and ecosystem functioning, it is increasingly accepted that the focus of study needs to shift from taxonomic identity to the diversity of functional traits displayed by species within a community. Such an approach allows species to be grouped according to particular functional characteristics. Increasingly viewed as an extremely important group of model organisms, hoverflies have been the focus of a variety of ecological studies. Based on data regarding selected functional traits of hoverflies registered in Southeast Europe, the main aims of our study were to define hoverfly functional groups according to the similarity of these traits, as well as to compare the representation of delineated hoverfly functional groups among these vegetation types. We used fuzzy clustering to classify 568 SE European hoverfly species into five functional groups. The principle trait separating these functional groups was larval feeding type, followed by size of species range, flight ability, number of generations, inundation tolerance, and tolerance to human impact. For 9 of 11 vegetation types, the dominant functional group was characterized by species with good flight ability, having high human impact tolerance and more annual generations. The remaining two vegetation types, South-west Balkan sub-Mediterranean mixed oak forests and Mediterranean mixed forests, showed disparate dominance patterns, indicating that richness of functional groups is dependent on vegetation. Further investigation of whether and how established conservation measures enable recovery of the functional richness affected by habitat disturbance would help elucidate the importance of functional diversity in preserving biodiversity.

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“…The differential responses of natural enemies and pollinators to semi-natural habitat in our study could be explained by functional group specific traits (Martin et al, 2019). For example, pollinators are very mobile and sensitive to habitat quality of semi-natural habitats (Li et al, 2020), and the spatial scale of 1 km radius may not have captured the functional spatial scales of the pollinator community (Martin et al, 2020). Thus, the response of beneficial arthropods to semi-natural habitat may be species specific, while it also depends on their biology and resource requirements (Karp et al, 2018;Martin et al, 2019).…”

Section: Discussionmentioning

confidence: 66%

“…The combination of negative effects of pesticides on-field, but no effects off-field, could imply that in landscapes with high land-use intensities (e.g. more pesticide applications) field margins may be important refuges for natural enemies (Li et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…These habitats may have an important function for beneficial insects within the agroecosystem, e.g. by providing overwintering sites, food resources due to presence of alternate prey or flower resources, reproduction sites, or dispersal corridors (Marshall and Moonen, 2002;Pywell et al, 2015;Dover, 2019;Li et al, 2020). Drift or overspray of insecticides impacts plant community structure and plant diversity (Schmitz, Hahn and Brühl, 2014), and affects non-target insects in field margins through (i) close contact to polluted areas, (ii) eating of contaminated food, and (iii) uptake through mouth and nose airways (Marshall and Moonen, 2002;Botías et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Insect and insecticides in agricultural landscapes; socio-ecological challenges and patterns

Bakker

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Pest management is essential to prevent crop losses. Chemical pesticides are standard practice in conventional farming systems because they are simple to use, cheap, and usually highly effective in providing short-term reduction in pest densities. Yet, their use can also lead to impacts on human health and biodiversity, pollution of air and water, and evolution of resistance in target pests. Chemical-based pest management can lead to lock-in because of an interplay of reinforcing environmental factors, science and technology, and sociopolitical factors, the so-called pesticide treadmill. To reduce farmers' dependency upon pesticides and to lessen the associated environmental burden, a solid understanding of the socio-ecological features of pest management decision-making is needed. Using a multidisciplinary approach, I aimed to provide critically needed insight in the system dynamics underlying farmers' pest control practices, and elucidate key principles governing a transition towards sustainable pest management. Table of ContentsChapter 1 1 General introduction Chapter 2 15 Neonicotinoids in global agriculture: evidence for a new pesticide treadmill? Chapter 3 45 Landscape-wide insecticide exposure impacts beneficial arthropod abundance Chapter 4 71 No significant effects of insecticide use indicators and landscape variables on biocontrol in field margins Chapter 5 95 Kicking the habit: what makes and breaks farmers' intentions to reduce pesticide use?

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The relative importance of green infrastructure as refuge habitat for pollinators increases with local land‐use intensity

Abstract: 1. Agricultural expansion and intensification have resulted in strong declines in farmland biodiversity across Europe. In many intensively farmed landscapes, linear landscape elements such as field boundaries, road verges and ditch banks are

Cited by 25 publications

References 50 publications

A multitaxa assessment of the effectiveness of agri-environmental schemes for biodiversity management

A multitaxa assessment of the effectiveness of agri-environmental schemes for biodiversity management

Functional groups of hoverflies in Southeast Europe across different vegetation types

Insect and insecticides in agricultural landscapes; socio-ecological challenges and patterns

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