Raumanalyse der ackerbaulichen Flächennutzung in Naturschutz- und FFH-Gebieten in Deutschland - Ein Beitrag zur Minderung von Biodiversitätsschäden in Schutzgebieten

Eichler, Lisa; Meinel, Gotthard; Hörren, Thomas; Sorg, Martin; Köthe, Sebastian; Lehmann, Gerlind U. C.; Mühlethaler, Roland

doi:10.1399/nul.2022.04.03

Cited by 6 publications

(18 citation statements)

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“…With the Digital Land Cover Model Germany (LBM-DE) 2018 of the Federal Agency for Cartography and Geodesy (BKG), we extracted the amount of area in agricultural production and nature reserves in the surrounding of the 21 selected conservation areas, the German category of nature-protected areas (NSG) and the protected areas under the FFH directive of the EU (Eichler et al 2022) (Online Resource 2, Landscape analysis). To obtain information on the proportion of the agricultural production area and nature conserved area within a radius of 500-3500 m, the transect consisting of traps 1 to 5 was buffered by 500 m, 1000 m, 1500 m, 2000 m, 2500 m, 3000 m, and 3500 m respectively.…”

Section: Landscape Analysismentioning

confidence: 99%

“…To enable an evidence-based optimisation of protected area management, we assess species composition at selected sites, unprecedented in its completeness for flying insects due to the use of DNA metabarcoding and relate it to floral (Swenson et al 2022) and spatial characteristics of the nature reserves and potential pesticide residues. By drawing on a complete set of biodiversity monitoring data, ecotoxicology data (Brühl et al 2021) as well as spatial data on agricultural land-use (Eichler et al 2022), this study presents a comprehensive analysis of impacts on insect biodiversity in nature reserves.…”

Section: Introductionmentioning

confidence: 99%

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Improving insect conservation management through insect monitoring and stakeholder involvement

et al. 2022

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In recent years, the decline of insect biodiversity and the imminent loss of provided ecosystem functions and services has received public attention and raised the demand for political action. The complex, multi-causal contributors to insect decline require a broad interdisciplinary and cross-sectoral approach that addresses ecological and social aspects to find sustainable solutions. The project Diversity of Insects in Nature protected Areas (DINA) assesses insect communities in 21 nature reserves in Germany, and considers interactions with plant diversity, pesticide exposure, spatial and climatic factors. The nature reserves border on agricultural land, to investigate impacts on insect diversity. Part of the project is to obtain scientific data from Malaise traps and their surroundings, while another part involves relevant stakeholders to identify opportunities and obstacles to insect diversity conservation. Our results indicate a positive association between insect richness and biomass. Insect richness was negatively related to the number of stationary pesticides (soil and vegetation), pesticides measured in ethanol, the amount of area in agricultural production, and precipitation. Our qualitative survey along with stakeholder interviews show that there is general support for insect conservation, while at the same time the stakeholders expressed the need for more information and data on insect biodiversity, as well as flexible policy options. We conclude that conservation management for insects in protected areas should consider a wider landscape. Local targets of conservation management will have to integrate different stakeholder perspectives. Scientifically informed stakeholder dialogues can mediate conflicts of interests, knowledge, and values to develop mutual conservation scenarios.

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Section: Landscape Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving insect conservation management through insect monitoring and stakeholder involvement

et al. 2022

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“…A similarly dramatic situation is evident for the threat to wildlife in these arable habitats. With agricultural use as a major cause of insect decline (Sánchez-Bayo & Wyckhuys, 2019), NPA and special areas of conservation (SAC) of the European Natura 2000 network are becoming increasingly important for the conservation of biodiversity, including arable habitats (Eichler et al, 2022; Sorg et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…The DINA project (Diversity of Insects in Nature protected Areas), a comprehensive interdisciplinary research project involving eight institutions (Lehmann et al, 2021), investigates the influence on insect populations in nature reserves as part of SAC and within the European Natura 2000 network (Brühl et al, 2021; Eichler et al, 2022; Köthe et al, 2023a; Lehmann et al, 2021; Swenson et al, 2022). Based on the original model to study the main drivers for the decline in insect biomass (Hallmann et al 2017), we focused on the already identified covariates: the influence of arable land and the chemical inputs such as nitrogen and pesticides associated with intensive land use.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, due to the comparability in methodology, the data can be collated with those of Hallmann et al (2017). In addition to insect data, landscape elements and their spatial distribution pattern (Eichler et al, 2022), vegetation (Köthe et al, 2023b; Swenson et al, 2022), and pesticide residues were measured (Brühl et al, 2021) accompanied by exchange with local stakeholders for developing solutions for improved insect protection (Fickel et al, 2020; Köthe et al, 2023a; Lehmann et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Insect biomass of protected habitats under the impact of arable farming in Germany

Mühlethaler,

Köthe,

Hörren

et al. 2023

Preprint

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Five years after the well-known study on insect biomass decline in nature protected habitats in Germany over three decades, the project DINA (Diversity of Insects in Nature protected Areas) has investigated the status of insects in 21 selected nature reserves across Germany in the years 2020 and 2021. We used the same methods and protocols for trapping and measuring the biomass of flying insects as in the mentioned study. Across two seasons, we accumulated a comprehensive data set of 1621 data points of two-week emptying intervals. The measured overall insect biomass remained at low levels and corresponds to the published latest figures from the years 2007-2016. There were no significant regional differences, but biomass was negatively correlated with agricultural production area within 2 km of nature reserves. Differences between the two consecutive years were very likely due to well-known natural fluctuations of insect populations, changes in agricultural cultivation and local weather events. The results show that protected habitats are essential for insects, but not sufficient in their function, and that further steps need to be taken for a better protection and sustainment of insects, which fulfil key functions in many ecosystems.

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No recovery in the biomass of flying insects over the last decade in German nature protected areas

Mühlethaler,

Köthe,

Hörren

et al. 2024

Ecology and Evolution

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Five years after a German study on insect biomass described a multi‐decade decline in nature protected habitats, the DINA (Diversity of Insects in Nature protected Areas) project has investigated the status of insects in 21 selected nature reserves across Germany in the years 2020 and 2021. We used the same methods and protocols for trapping and measuring the biomass of flying insects as in the earlier study. Across two vegetation periods, we accumulated a comprehensive data set of 1621 data points of two‐week emptying intervals to evaluate the insect biomass along gradients from arable land into nature reserves through transects of Malaise traps. On average, we observed an increase in maximum insect biomass per day along the transect from the edge to the centre of the nature reserve. Overall, the measured insect biomass remained at low levels, consistent with previous findings from the years 2007–2016. There were no significant regional differences. The results show that protected habitats have higher insect biomass compared to farmland and are therefore essential for insects but are unlikely to be sufficient to sustain insect biodiversity. Further measures need to be taken for better protection and sustainment of insects, which fulfil key functions in all terrestrial ecosystems.

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Raumanalyse der ackerbaulichen Flächennutzung in Naturschutz- und FFH-Gebieten in Deutschland - Ein Beitrag zur Minderung von Biodiversitätsschäden in Schutzgebieten

Cited by 6 publications

References 0 publications

Improving insect conservation management through insect monitoring and stakeholder involvement

Improving insect conservation management through insect monitoring and stakeholder involvement

Insect biomass of protected habitats under the impact of arable farming in Germany

No recovery in the biomass of flying insects over the last decade in German nature protected areas

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