Statistics Explained

Archive:Biodiversity statistics

Revision as of 15:51, 16 November 2016 by Wolfcmi (talk | contribs) (→‎Habitats)
Data from November 2016. Most recent data: Further Eurostat information, Main tables and Database. Planned article update: November 2017.


Biodiversity — a contraction of biological diversity — encompasses the number, variety and variability of living organisms, including humans. Given that we depend on the natural richness of our planet for the food, energy, raw materials, clean air and clean water that make life possible and drive our economies, most commentators agree it is imperative to seek to prevent a loss of biodiversity, since any loss may not only undermine the natural environment, but also our economic and social goals.

The challenges associated with preserving biodiversity have made this topic an international issue. This article examines two indicators for biodiversity in the European Union (EU) — information on protected areas (for terrestrial and marine biodiversity) and bird populations.

Figure 1: Natura 2000 protected terrestrial area, 2015
Source: EEA / European topic centre on biodiversity; Eurostat (env_bio1)
Figure 2: Protected terrestrial area — sufficiency of sites, 2013
(%)
Source: EEA / European topic centre on biodiversity; Eurostat (env_bio1)
Figure 3: Natura 2000 protected marine area, 2015 (1)
(thousand km2)
Source: EEA / European topic centre on biodiversity; Eurostat (env_bio1)
Figure 4: Protected marine area — sufficiency of sites, 2013
(%)
Source: EEA / European topic centre on biodiversity; Eurostat (env_bio1)
Figure 5: Common bird indices, EU, 1990–2014 (1)
(aggregated index of population estimates of selected groups of breeding bird species, 2014 = 100)
Source: EBCC / RSPB / BirdLife / Statistics Netherlands; Eurostat (env_bio3)
Figure 6: Compound annual rate of change of the common farmland bird index (1)
(T / T0, %)
Source: Eurostat (env_bio2)

Main statistical findings

Habitats

Areas protected for the preservation of biodiversity are proposed by the EU Member States under the Habitats Directive and under the Birds Directive. Some 788 thousand km2 of the EU-28‘s terrestrial area were proposed for protection as of 2015, around 18 % of the total land area. Compared with 2010, these latest figures show a 4 percentage point increase in the EU’s protected terrestrial area. Known as Natura 2000, it is the largest network of protected areas in the world, and a testament to the importance that EU citizens attach to biodiversity. Natura 2000 does not include areas that may only be protected under national legislation. Economic activities are not excluded within the Natura 2000 network, so the impact of these areas on biodiversity depends on the way they are managed in practice.

Figures for the EU Member States show that the proportion of the terrestrial area that was protected under Natura 2000 in 2015 ranged from 38 % in Slovenia, 37 % in Croatia and 34 % in Bulgaria to less than 10 % of the total areas of the United Kingdom and Denmark — see Figure 1.

The largest protected terrestrial area in absolute terms was located in Spain (138 thousand km2 in 2015). This area was almost twice as big as the next largest protected area, some 70 thousand km2 in France. Romania, Germany, Sweden, Italy and Poland each reported 54–61 thousand km2 of protected terrestrial area.

Protected terrestrial areas adequately cover most of the biogeographical regions in the EU Member States. Figure 2 provides an analysis of the sufficiency of sites of Community importance (SCIs) proposed by the Member States under the Habitats Directive, measuring the degree to which the Directive has been implemented in terms of different habitats / sites covered and number of species occurring there. Using this measure, the European Commission considered the SCIs proposed for the EU-28 to sufficiently cover 92 % of species and habitats in 2013, while 8 % of species and habitats were not yet covered by any proposed sites. The sufficiency of sites covered by the Habitats Directive stood at 95 % or more in 16 EU Member States, reaching 100 % in Ireland. For the 11 subsequent EU Member States, the sufficiency of sites was within the range of 70–95 %, with the lowest rates recorded in Lithuania (77 %), Slovakia (77 %) and Austria (70 %). The lowest rate was seen in Cyprus at 46 %.

In addition to protected terrestrial areas, there were around 360 thousand km2 of protected marine areas in EU-28 waters in 2015. Nearly one quarter of this total — 84 thousand km2 or 23.4 % — was located in coastal waters around Spain. British and French protected waters together accounted for around one third (32.2 %) of the EU-28’s protected marine area — see Figure 3.

The sufficiency index for marine sites — reaching only 55 % for the EU-28 as a whole — shows that the EU’s coastal waters are not yet sufficiently protected — see Figure 4. The European Commission judged the level of protection to be complete in Germany, Estonia and the Netherlands.

Common birds

Between 1990 and 2000 there was a general decline in the EU’s populations of both common farmland birds and common forest birds. This pattern was even sharper before 2000 for common farmland birds, resulting in a huge decline by 46 % between 1990 and 2014 (indexed on 2014). Many of these losses can be attributed to changes in land use and agricultural practices, including the intensification of crop rotation patterns and of pesticide use. While the number of common forest birds in the EU declined by 24 percentage points between 1990 and 2000 (indexed on 2014), there was a small recovery during the period 2000–14, so that the overall decline between 1990 and 2014 was around 14 %, which was the same for all common species in the same period.

Figure 5 also presents within each bird category the changes in the indicators through the compound annual rate of change (values in the boxes). This indicator is independent of the base year chosen and allows comparability throughout the various bird categories as well as among Member States. This variable makes it possible to compare the average annual rates of change between countries with different starting and end years of their time series. At – 1.56, the EU value of the compound annual rate of change is highest for common farmland birds, while the value for common forest species was – 0.54, and – 0.56 for the aggregated value of all the monitored species. Using these average annual rates of change, the EU’s farmland birds declined by 'only' 39 % over 25 years (1990–2014), while the forest birds and all birds each declined by 14 %.

Figure 6 shows the compound annual rate of change for the common farmland species at national level for the available countries. The different time coverage of the data reflects each country’s participation in the pan-European common bird monitoring scheme, so there are fewer data available going back to 1990. Only Latvia, Lithuania and Ireland had any improvement in their farmland bird index. In 11 countries (Portugal, Spain, the Czech Republic, Estonia, Denmark, Germany, Poland, Italy, Slovakia, Sweden and Switzerland) although negative, the indicator was above the EU average (– 1.56). In the remaining 12 countries the values indicated poorer performances, with a compound annual rate of change below – 3.00 in Austria, Slovenia and Greece and reaching – 6.76 in Cyprus.

Data sources and availability

Habitats

Annual data are available on terrestrial and marine areas protected under the Habitats Directive (92/43/EEC) of 21 May 1992 on the conservation of natural habitats and of wild fauna and flora. The Directive protects over 1 000 animal and plant species and more than 200 types of habitat (for example, special types of forests, meadows or wetlands), which are considered to be of European importance. It has led to the creation of a network of protected sites that are proposed by EU Member States as special areas of conservation (SACs). Together with the special protection areas (SPAs) defined by the Birds Directive of 2 April 1979, codified by Directive 2009/147/EU of 30 November 2009, these areas make up the Natura 2000 network of protected areas.

The sufficiency index measures progress in the implementation of the Habitats Directive. It indicates the proportion of habitats and species by biogeographical region and country that the European Commission deems to be sufficiently represented in the list of sites proposed by EU Member States, in relation to the number of species and habitats on the EU reference lists of habitat types and species in the same biogeographical regions. It expresses the degree to which the European Commission considers each national network of sites of community importance (SCI) under the Habitats Directive to suffice in terms of number, extent, distribution and representativeness of species and habitats covered. Once the national SCIs are accepted by the European Commission, the Member States must designate them as SACs within six years. The European Commission updates the EU’s SCI lists every year to ensure that any new sites proposed by Member States have a legal status.

Birds

Across the EU, the conservation of wild birds is covered by Council Directive 79/409/EEC of 2 April 1979, as codified by Directive 2009/147/EU of 30 November 2009. Birds are considered to be good proxies for measuring the diversity and integrity of ecosystems as they tend to be near the top of the food chain, have large ranges and the ability to move elsewhere when their environment becomes unsuitable; they are therefore responsive to changes in their habitat. Birds are thus a recognised ecological indicator taxon.

The bird indicators presented in this article measure the development of common bird populations. They are designed to capture the overall, average changes in population levels of birds to reflect the health and functioning of the ecosystems they inhabit. The population index of common birds is an aggregated index (with base year = 1990, or the first year that each EU Member State entered the scheme) of population estimates for a selected group of common bird species. Indices are calculated for each species independently and are then combined to create a multi-species EU indicator by averaging the indices, using a geometric average based on equal weights for each species.

The EU index is based on data from 26 EU Member States (data for Croatia and Malta are not available), derived from annually operated surveys of national breeding birds collated by the Pan-European Common Bird Monitoring Scheme (PECBMS); these data are considered to be a good proxy for the whole of the EU.

Three different indices are presented:

  • Common farmland birds (39 species)
  • Common forest birds (34 species)
  • All common birds (167 species)


For the first two categories, the bird species have a high dependence on agricultural or on forest habitats in the nesting season and for feeding. Both groups comprise year-round residents and migratory species. The index ‘All common birds’ comprises farmland and forest species together with other common species that are generalists, meaning that they occur in many different habitats or are particularly adapted to life in cities.

Context

Many aspects of the natural environment are public goods, in other words, they have no market value or price. As such, the loss of biodiversity can often go undetected by economic systems. However, the natural environment also provides a range of intangibles, such as the aesthetic pleasure derived from viewing landscapes and wildlife, or recreational opportunities. In order to protect this legacy for future generations, the EU seeks to promote policies in a range of areas to ensure that biodiversity is protected through the sustainable development of, among others, agriculture, rural and urban landscapes, energy provision and transport.

The EU’s biodiversity strategy is based on the implementation of two landmark Directives, the Habitats Directive (92/43/EEC) of 21 May 1992 and the Birds Directive (79/409/EEC)) of 2 April 1979, as codified by Directive 2009/147/EU of 30 November 2009. Implementation of these Directives has involved the establishment of a coherent European ecological network of sites under the title Natura 2000. At the end of December 2015, Natura 2000 counted around 26 410 sites and a land area of 788 thousand km2 (and a total of 27 308 sites and an area of just over 1.0 million km2 including marine sites) where plant and animal species and their habitats were protected. Establishing the Natura 2000 network may be seen as the first pillar of action relating to the conservation of natural. However, EU legislation also foresees measures to establish a second pillar through strict protection regimes for certain animal species (for example, the Arctic fox and the Iberian lynx, both of which are under serious threat of extinction).

In 1998, the EU adopted a biodiversity strategy. Four action plans covering the conservation of natural resources, agriculture, fisheries, and economic and development cooperation were subsequently agreed as part of this strategy in 2001.

In May 2011, the European Commission adopted the Communication ‘Our life insurance, our natural capital: an EU biodiversity strategy to 2020 (COM(2011) 244 final)’)), aimed at halting the loss of biodiversity and ecosystem services in the EU by 2020. Biodiversity loss is seen as a considerable challenge in the EU, with around one in four species currently threatened with extinction and 58 % of fish stocks over-exploited or significantly depleted. There are six main targets and 20 actions to help reach this goal. The six targets cover:

  • full implementation of EU nature legislation to protect biodiversity;
  • better protection for ecosystems and more use of green infrastructure;
  • more sustainable agriculture and forestry;
  • better management of fish stocks;
  • tighter controls on invasive alien species;
  • a bigger EU contribution to averting global biodiversity loss.


The strategy is in line with two commitments made in March 2010:

  • the 2020 headline target — halting the loss of biodiversity and the degradation of ecosystem services in the EU by 2020, and restoring them insofar as feasible, while stepping up the EU’s contribution to averting global biodiversity loss;
  • the 2050 vision — which foresees that by 2050, the EU’s biodiversity and the ecosystem services it provides — its natural capital — are protected, valued and appropriately restored for biodiversity’s intrinsic value, and for their essential contribution to human well-being and economic prosperity, and so that catastrophic changes caused by the loss of biodiversity are avoided.


The strategy is also in line with global commitments made in Nagoya (Japan) in October 2010, in the context of the Convention on biological diversity, where world leaders agreed a package of measures to address global biodiversity loss over the coming decade; there were 92 signatories to this United Nations protocol, while 69 countries ratified it. The Nagoya Protocol entered into force on 12 October 2014.

In 2015, the European Commission reviewed the EU biodiversity strategy to 2020 at its mid-term, to see whether it was on track to reach its targets. The review found that no significant progress towards the 2020 headline target had been made. The only target found to be on track was the one on combating invasive alien species.

See also

Further Eurostat information

Publications

Main tables

Biodiversity (t_env_biodiv)
Sufficiency of sites designated under the EU Habitats directive (tsdnr210)
Common bird index (tsdnr100)

Database

Biodiversity (env_biodiv)
Protected Areas for biodiversity: Habitats Directive (env_bio1)
Common farmland bird index (env_bio2)
Common bird indices by type of estimate (EU aggregate) (env_bio3)

Source data for tables and figures (MS Excel)

Other information

External links


Retrieved from "https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Archive:Biodiversity_statistics&oldid=314413"