[NB14] Farmland bird index
Key message
In the period (2008-2022), the farmland bird index is 73.9, and the grassland bird index in the agricultural landscape is 56.3.The fourteen-year trend of farmland birds shows moderate declining, despite a stable trend over the last eight years.
Definition
This indicator measures changes in populations of characteristic farmland bird species. The relative change (index) in the number of pairs is measured based on field surveys. According to our estimates, monitoring will allow us to follow long-term population trends, as monitoring is carried out on a large number of plots (110 plots in the period 2008–2016). These surveys are mostly carried out by local volunteers close to their homes. If there is no data for a certain year, it can be replaced with the data from a relevant statistical model.
Charts
Source (Kmecl P in Gamser M (2024): Monitoring splošno razširjenih vrst ptic za dolocitev slovenskega indeksa ptic kmetijske krajine - delno porocilo za leto 2024. - DOPPS, Ljubljana)
| Farmland indicator species[index(100=2008)] | Generalist species[index(100=2008)] | Meadow species[index(100=2008)] | |
|---|---|---|---|
| 2008 | 100 | 100 | 100 |
| 2009 | 95.50 | 97.10 | 93.60 |
| 2010 | 80.50 | 92.20 | 67.30 |
| 2011 | 82.50 | 98.70 | 69.40 |
| 2012 | 84.50 | 101.20 | 65.30 |
| 2013 | 80.70 | 89.50 | 62.60 |
| 2014 | 79.60 | 93.80 | 60.50 |
| 2015 | 72.60 | 85.90 | 57.40 |
| 2016 | 75.60 | 88 | 60.20 |
| 2017 | 75.90 | 91.50 | 56.30 |
| 2018 | 78.30 | 89 | 60 |
| 2019 | 77 | 91 | 61.30 |
| 2020 | 81.10 | 92.50 | 60.50 |
| 2021 | 76.30 | 94.30 | 55.50 |
| 2022 | 74 | 86.70 | 56.30 |
| 2023 | 76.20 | 89 | 59 |
| 2024 | 77.10 | 86.10 | 58.30 |
Goals
To reverse the negative trend and to restore the state of farmland birds to the same level as in the base year (2008).
Biodiversity Conservation Strategy of Slovenia
To maintain favourable state of all indigenous animal and plant species. (2.3)
To restore the ecological and social function of agriculture that contributes to the preservation of rural areas and high biodiversity in those areas and is based on sustainable farming practices and sustainable development of rural areas. (3.1)
The EU biodiversity strategy to 2020
TARGET 3: INCREASE THE CONTRIBUTION OF AGRICULTURE AND FORESTRY IN ORDER TO MAINTAIN AND ENHANCE BIODIVERSITY
3. A) Agriculture: By 2020, maximise areas being used for agriculture across grasslands, arable land and permanent crops that are covered by biodiversity-related measures under the CAP so as to ensure the conservation of biodiversity and to bring about a measurable improvement in the conservation status of species and habitats that depend on or are affected by agriculture and in the provision of ecosystem services as compared to the EU2010 Baseline, thus contributing to enhanced sustainable management.
Comment
Methodology
Bibby CJ, Burgess ND, Hill DA (1992) Bird Census Techniques. Academic Press, London.
Bogaart P, van der Loo M, Pannekoek J (2020) rtrim: Trends and Indices for Monitoring Data. R package version 2.1.1. https://CRAN.R-project.org/package=rtrim
de Zeeuw M (2019): RTRIM-shell. Version RTRIM-shell_v1.3. Tool to run rtrim (= TRIM in R) for multiple species and subsets of sites. rtrim@cbs.nl, Statistics Netherlands.
Denac K, Figelj J, Mihelič T (2006) Strokovne podlage za določitev slovenskega indeksa ptic kmetijske krajine (Farmland Bird Index) in njegovo spremljanje. DOPPS, Ljubljana.
Kmecl P & Gamser M (2024): Monitoring splošno razširjenih vrst ptic za določitev slovenskega indeksa ptic kmetijske krajine – delno poročilo za leto 2024. DOPPS, Ljubljana.
Pannekoek J, van Strien AJ (2009) TRIM 3 Manual. Statistics Netherlands, Voorburg.
R Core Team (2020) R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. https://www.R-project.org/