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| Ecological relevance | The number of insect species in a habitat provides insights into ecosystem health. A high number of species indicates good habitat quality. |
| Description | The indicator "Insect diversity in viticulture - number of insect species" serves to record the diversity of insects in viticulture and thus to monitor species losses or gains due to climate change and management practices. The extent to which negative developments such as insect decline occur in viticulture is unknown and is to be recorded by this sub-indicator. |
| Data basis | Using Malaise traps and metabarcoding, the number of species in representative, unchanging vineyards is recorded over many years. These vineyards are located in the Palatinate (lowland viticulture) and along the Moselle (steep slope viticulture) and structurally cover large areas of German viticulture. |
| Calculation | Based on the species lists from the metabarcoding, the annual number of species per site is calculated, and changes are compared with the moving average of previous years. The calculation of α, β, and γ diversity serves to evaluate the sampling sites and to compare the Palatinate and Moselle regions. |
| Spatial reporting level | The indicator value is reported for the institute's own areas of the Julius Kühn Institute for Plant Protection in Fruit and Wine Growing in the Southern Palatinate and the Rural Service Centre on the Moselle. |
| Report interval | Once monitoring begins, the indicator will be reported annually. |
| Interpretation | Increases or decreases in the number of species indicate trends in the state of insect diversity. Developments in this indicator can reveal the effects of measures already implemented, as well as the need for further conservation measures. |
