A Grid-Based Sampling Approach to Insect Biodiversity Monitoring in Agricultural Landscapes

Scherber, Christoph; Beduschi, Tatiane; Tscharntke, Teja

doi:10.1007/978-3-030-67448-9_19

Cited by 3 publications

(3 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pan traps were installed during four time periods (28 June-1 July, 5-8 July, 12-15 July and 23-26 July) as an indirect measure of arthropod abundance (Scherber & Beduschi, 2021). We had to exclude the third sampling period, because heavy rain had flooded the traps.…”

Section: Pan Trapsmentioning

confidence: 99%

Multispecies crop mixtures increase insect biodiversity in an intercropping experiment

Brandmeier,

Reininghaus,

Scherber

2023

Ecol Sol and Evidence

View full text Add to dashboard Cite

Recent biodiversity declines require action across sectors such as agriculture. The situation is particularly acute for arthropods, a species‐rich taxon providing important ecosystem services. To counteract the negative consequences of agricultural intensification, creating a less hostile agricultural ‘matrix’ through growing crop mixtures can reduce harm for arthropods without yield losses. While grassland biodiversity experiments showed positive plant biodiversity effects on arthropods, experiments manipulating crop diversity and agrochemical input used to study arthropods are lacking. Here, we experimentally manipulated crop diversity (1–3 species, fallows), crop species (wheat, faba bean, linseed and oilseed rape) and agrochemical input (high vs. low) and studied responses of arthropod biodiversity. We tested whether arthropod responses were affected by crop diversity, mixtures and management. Additionally, we measured crop biomass. Crop biomass increased with crop diversity under high‐input management, while under low management intensity, biomass was highest in two‐species mixtures. Increasing crop diversity positively affected arthropod abundance and diversity, under both low‐ and high‐input management. Crop mixtures containing faba bean, linseed or oilseed rape had particularly high arthropod diversity. Mass‐flowering crops attracted more arthropods than legumes or cereals. Integrating intercropping into agricultural systems could increase flower visits by insects up to 1.5 million per hectare, thus likely also supporting pollination and pest‐control ecosystem services. Flower visitor network complexity increased in mixtures containing linseed and faba bean and under low‐input management. Intercropping can counteract insect declines in farmland by creating beneficial matrix habitat without compromising crop yield.

show abstract

Section: Pan Trapsmentioning

confidence: 99%

Multispecies crop mixtures increase insect biodiversity in an intercropping experiment

Brandmeier,

Reininghaus,

Scherber

2023

Ecol Sol and Evidence

View full text Add to dashboard Cite

show abstract

“…Pan traps were installed for four time periods (June 28 th -July 1 st , July 5 th -8 th , July 12 th -15 th , July 23 rd -26 th ) as an indirect measure of abundance (Scherber & Beduschi 2021) to assess insects on plots containing wheat, faba bean, linseed and oilseed rape, their mixtures and plots with no crop sown. We had to exclude the third round, because heavy rain flooded the traps.…”

Section: Pan Trapsmentioning

confidence: 99%

Multi-species crop mixtures increase insect biodiversity in an intercropping experiment

Brandmeier

Reininghaus²,

Scherber³

2022

Preprint

Self Cite

View full text Add to dashboard Cite

Recent biodiversity declines require action across sectors such as agriculture. The situation is particularly acute for arthropods, a species-rich taxon providing important ecosystem services. To counteract negative consequences of agricultural intensification, creating a less hostile agricultural “matrix” through growing crop mixtures can reduce harm for arthropods without yield losses. While grassland biodiversity experiments showed positive plant biodiversity effects on arthropods, experiments manipulating crop diversity and management intensity to study arthropods are lacking. Here, we experimentally manipulated crop diversity (1-3 species, fallows), crop species (wheat, faba bean, linseed, oilseed rape) and agrochemical input (high vs. low) and studied responses of arthropod biodiversity. Increasing crop diversity increased arthropod diversity and arthropod numbers. Mass-flowering crops attracted more arthropods than legumes or cereals. Integrating intercropping into agricultural systems could lead to a massive increase in flower visits (up to 15 million visits/ha), indicating benefits of intercropping for insect biodiversity and associated ecosystem services.

show abstract

“…The abundance of insects declined in agricultural landscapes over the last decades (Hallmann et al 2017;Seibold et al 2019) leading to a loss of ecosystem services and cascading effects on food webs (Cardoso et al 2020). This has increased the need for research on the effectiveness of biodiversity measures in supporting insects and for monitoring of the development of insect communities in agricultural landscapes (Brooks et al 2012;Kunin 2019;Scherber et al 2021). Particularly, an increasing number of research and monitoring projects are seeking to assess the abundance and species richness of insects at landscape level (Scherber et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Efficiency of spatial sampling designs in estimating abundance and species richness of carabids at the landscape level

et al. 2023

View full text Add to dashboard Cite

Context Declining biodiversity in agricultural landscapes has increased the need for research and monitoring of insect abundance and diversity at the landscape level. Objectives We investigated the accuracy of different spatial sampling designs in estimating landscape-level abundance and species richness of carabids in agricultural landscapes and, further, which sample size per landscape section was required and whether dominating land use or landscape subdivision affected accuracy and required sample size. Methods We developed a simulation model that created raster maps of agricultural landscapes, compiled local carabid communities (species composition and abundances) within raster cells and simulated the sampling of carabids with pitfall traps using different spatial sampling designs and sample sizes between 4 and 49 sampling points per landscape section. Spatial sampling designs included random, systematic grid-based, stratified and clustered schemes. Results To estimate landscape-level abundance, area-proportional stratified random sampling was most accurate followed by systematic grid-based designs. A sample size of 25 appeared to be the best trade-off between accuracy and sampling cost. Accuracy was not affected substantially by landscape characteristics in most cases. With respect to species richness, all designs except for clustered sampling had comparable accuracies, but even 49 samples were not sufficient to detect 80% of the species. Conclusion Systematic grid-based designs are generally recommendable for sampling of carabids in agricultural landscapes and, in case a carabid-specific habitat classification is available, area-proportional stratified random sampling provides optimal accuracy for estimating landscape-level abundance. For assessment of species richness, large sample size is more important than spatial sampling design.

show abstract

A Grid-Based Sampling Approach to Insect Biodiversity Monitoring in Agricultural Landscapes

Cited by 3 publications

References 38 publications

Multispecies crop mixtures increase insect biodiversity in an intercropping experiment

Multispecies crop mixtures increase insect biodiversity in an intercropping experiment

Multi-species crop mixtures increase insect biodiversity in an intercropping experiment

Efficiency of spatial sampling designs in estimating abundance and species richness of carabids at the landscape level

Contact Info

Product

Resources

About