This study presents a spatial analysis of priority areas for biodiversity conservation (PABCs) in Brazil and their coverage by federal protected areas as an indicator of the level of protection afforded to biodiversity in the country and the convergence of environmental protection policies in the sphere of federal government. Georeferenced data were processed using a geographic information system, enabling the calculation of areas, analyses of superimpositions, localizations, and the obtainment of other information using spatial features manipulated in this system. A comparative analysis is done of the PABCs mapped in two periods (2003 and 2007) to ascertain the evolution of this public policy instrument in detecting environmental priorities in protected areas. The improved coverage of PABCs by protected areas in the more recent mapping indicates a good convergence of environmental policies, which are enhanced by technical improvements to mapping procedures and methods for identifying such areas. As a result, the priority areas for biodiversity conservation could become a protected area regulated and recognized by the federal government.
Brazil has been termed a megadiverse country because it harbors such a large proportion of the planet’s biodiversity: 15% - 20%. It was also the first signatory in the UN Convention on Biological Diversity (CBD). Conservation International has put it at the top of a ranking of 17 countries that host at least 70% of the planet’s animal and plant species. Brazil’s biodiversity is attested by its diversity of ecosystems, biological species, endemic species, and genetic heritage. Due to the Brazilian continental dimensions and great geomorphological and climatic variations, Brazil hosts six biomes and a coastal marine ecosystem [
The protection of nature, specially biodiversity, and the sustainable use of natural resources are high on the contemporary agenda, being discussed widely and frequently around the world. This is resulted by the concerns about the consequences of the rapid environmental transformations being affected by man’s action [
One outcome of the coordinated world governments action for the creation of nature conservation measures was the Convention on Biological Diversity (CBD), signed in Rio de Janeiro in June 1992. One basic principle espoused in this document is that the states have the sovereign right to exploit their own resources, based on their own environmental laws. These countries should take measures to ensure that their activities do not harm the environment [
The CBD goal is the conservation of biological diversity, with the maintenance of the variety of terrestrial, airborne, and aquatic organisms, the sustainable use of biodiversity and its components, and the fair and equitable use of the benefits it promotes [
The eighth CBD article establishes that each party should set up a system of protected areas and measures to conserve biological diversity and promote the protection of ecosystems and natural habitats [
To fulfill the CBD goals and requirements, Brazil had to develop a national biodiversity policy, which was instated through Federal Executive Order #4.339 on August 22, 2002. It also created a national program for biological diversity (Programa Nacional de Diversidade Biológica, PRONABIO), which executive component is the Project for the Conservation and Sustainable Use of Brazilian Biological Diversity (Projeto de Conservação e Utilização Sustentável da Diversidade Biológica Brasileira, PROBIO).
On May 21, 2003, another executive order (#4.703) was issued to rename the program to National Biodiversity Commission (Comissão Nacional da Biodiversidade, CONABIO) [
As such, initiatives to identify global conservation priorities are rooted mainly in criteria like biological diversity indices and levels of threat to ecosystems. Regional priorities are translated into concrete actions by mapping and identifying Priority Areas for Biodiversity Conservation (PABCs). This is an objective, participative process, which results feed into the planning and execution of conservation actions and protected areas creation. It is understood that knowing the areas and the priority actions for the conservation and sustainable use of natural resources is a key prerequisite for environmental management [
The nationwide PABCs mapping was first done in 2003 and subsequently reviewed in 2007, with some partial updates since then. For the 2003 mapping process, PROBIO supported five major evaluations in workshops, which were divided per biome and involved specialists and other stakeholders. The results of these meetings were consolidated in the Map of Priority Areas for the Conservation, Sustainable Use, and Sharing of the Benefits of Brazilian Biodiversity (Mapa das ÁreasPrioritárias para a Conservação, UtilizaçãoSustentável e Repartição de Benefícios da BiodiversidadeBrasileira), published by the Ministry of the Environment in November 2003 and reedited in May 2004, through ministry directive #126 of May 27, 2004.
The Map of Priority Areas for Conservation is designed to assist in the formulation and execution of public policies, programs, projects, and activities under the responsibility of the federal government for:1) the in-situ conservation of biodiversity; 2) the sustainable use of components of biodiversity; 3) the sharing of benefits derived from access to genetic resources and associated traditional knowledge; 4) research and inventories of biodiversity; 5) the restoration of degraded areas and overexploited or endangered species; and 6) the enhancement of the economic value of biodiversity.
The 2007 map includes updates made by the Ministry of the Environment, which were done, preferentially, according to the Systematic Conservation Planning approach defined by the National Biodiversity Commission (CONABIO) in deliberation #39 of December 14, 2005. This approach is based on core ecological concepts, including representativeness, complementarity, efficiency, flexibility, vulnerability, and irreplaceability.
The aim of this study is to analyze the compliance of the Priority Areas for Biodiversity Conservation program by ascertaining the percentage coverage of PABCs different classes by the two types of federal protected area. The percentages of biomes included in these areas are calculated, as is the alignment with current trends in the protection of the most endangered biomes in Brazil, like the Atlantic Forest and the Cerrado [
Geospatial technologies are undergoing constant improvements. Today, there is great potential for geoprocessing systems and tools capable of meeting diverse service requirements. This is a boon for spatial analyses, as it reduces the time taken and costs incurred in producing data, while enhancing the quality of the information [
It is important to affirm that this study was never done before in Brazil. This research does a significant diagnosis for the Brazilian environmental management, specially when thinking about territory management and biodiversity conservation for the next 20 years.
The PABC polygons [
The database for the spatial analysis is composed of vector themes in the shapefile format (public domain) acquired from the official websites of the information producers: the PABCs from the Ministry of the Environment1,2 and the protected areas from ICMBio3. The database of Brazilian biomes was acquired in 2017 from the IBGE website4, and the polygon of the Exclusive Ecological Zone was obtained from the Department of Hydrography and Shipping5. The software used for the spatial analyses was ArcGis 10.1. The geographical reference adopted in producing and representing the data was the geographical projection based on the SIRGAS2000 datum. The methods for defining protected areas and PABCs are regulated by institutional rules and resolutions. For federal protected areas, the National System of Protected Areas (SNUC) is the main regulation for their creation and management. The guidance issued by ICMBio on September 18, 2007, and May 17, 2008 (Instruções Normativas 3 and 5, respectively), presents supporting legal framework and needed studies, while also defining what procedures and actions are to be taken by society and by the state for a protected area to be proposed and created [
Most of the PABCs were identified in regional biodiversity workshops run by Conservation International, where reliable information was gathered about the biological, social, and economic features of the region, which was evaluated by a multidisciplinary group of specialists. It is based on the set of national biomes and the coastal marine ecosystem. The updates are priorities of the Ministry of the Environment and are consistent with the recommendations of the CBD, Systematic Conservation Planning, and CONABIO guidelines. Data analyses are conducted using specific spatial modeling tools and GISs. According to Executive Order #5.092 of May 21, 2004, the Ministry of the Environment is responsible for setting the rules for the identification of these areas.
Given the difficulty of compiling environmental information on the whole territory from different sources and spheres of government into a single centralized database, this study is restricted to federal protected areas. The methodological differences adopted in producing the spatial data and the difficulty in acquiring data from other public entities hamper the compatibility, standardization, and unification of information. Limitations like the reliability of spatial information for regional and nationwide studies are responsible for the incomplete diagnoses and results on to the real coverage of protected areas in Brazil. Even so, these studies constitute important indicators for environmental assessments, and could serve as parameters for decision-making processes and the development of environmental policies [
By intersecting the PABCs layers and protected areas in a GIS, the area of each PABC class could be calculated per type of protected area. The areas of the PABCs were rated using the PROBIO classification, according to their conservation priority: 1) extremely high, 2) very high, 3) high, 4) insufficiently known, and 5) new areas known by regional groups. The federal protected areas were classified into “full protection” and “sustainable use,” as set forth in the National System of Protected Areas (SNUC;
As we are dealing here with themes with spatial coverage and a geographical lag, the Albers equal-area conical projection for South America was used to calculate the area―a reference system that enables area calculations in metric units for large geographical areas [
By April 2018, 324 land and coastal marine protected areas had been created,
summing approximately 794,000 km2, or little over 9% of Brazilian national territory. Since then, four new protected areas have been created in the Exclusive Ecological Zone, summing around 910,000 km2, extending until 200 nautical miles.
After the layers of information on PABCs and protected areas had been crossed, it was found that 74.3% of the PABCs mapped in 2003 were covered by federal protected areas, since 590,000 km2 of the 790,000 km2 of protected areas are in PABCs. For the 2007 mapping by the Ministry of the Environment using the revised data, the coverage reached 97.2%, since 777,000 km2 of the official areas of federal protected areas are in PABCs (
This suggests that this public policy instrument is very well aligned with national and sectorial environmental conservation policies, in view of the evolution of the methods for mapping PABCs. For them to be fully covered by protected areas, greater integration and standardization of environmental information and policies in all spheres of government is needed. This is being encouraged by the development of new national environmental systems for mapping and updating data.
The method for updating PABCs is refined through a participative information management process. In 2015, the Ministry of the Environment began to talk with the Ministry of Science, Technology, Innovation, and Communication for a new Information System on Brazilian Biodiversity. This Information System is consisted of an online platform combining data and information on the biodiversity of Brazil. This would enable more comprehensive studies and results concerning environmental conservation in the country. As well, a greater appraisal and follow-up capacity for the development of the processes and reviews involved, enabling the construction of centralized databases and the standardization of information for decision-making processes.
Having presented the size of each layer under analysis, tables, graphics, and maps are now used to show the evolution of this public policymaking instrument. It was compared the data on the PABCs mapped out at two different times in relationship with the coverage of federal protected areas in each biome.
From
General Data (layers) | ‘000 km2 | Brazilian Biomes | Area in ‘000 km2 | % of Biome in Brazil | No. of federal protected areas | Area of protected areas in ‘000 km2 |
---|---|---|---|---|---|---|
Area of Brazil | 8509 | Amazon | 4182 | 49% | 128 | 636 |
Area of federal protected areas (03/2018) | 790 | Caatinga | 827 | 10% | 23 | 32 |
Area of PABCs in protected areas (2003) | 590 | Cerrado | 2,039 | 24% | 47 | 68 |
Area of PABCs in protected areas (2007) | 777 | Pantanal | 151 | 2% | 2 | 1 |
Area of PABCs (2003) general | 5121 | Pampas | 178 | 2% | 3 | 4 |
Area of PABCs (2007) general | 8540 | Atlantic Forest | 1106 | 13% | 102 | 42 |
EEZ | 3600 | Coastal Marine Ecosystem | 3214 | 19 | 10 | |
Total | 324 | 794 |
Source: Data extracted from the polygons available in official Ministry of Environment databases in 2018.
PABCs-2003 (total) in the biomes | Area (in ‘000 km2) | % of biome covered |
---|---|---|
Amazon | 2468 | 59% |
Caatinga | 371 | 45% |
Cerrado | 682 | 33% |
Marine Coastal Ecosystem | 1,087 | 34% |
Atlantic Forest and Pampas | 453 | 35% |
Pantanal | 60 | 40% |
Total | 5121 |
Source: Data extracted from the polygons available in official Ministry of Environment databases in 2018.
PABCs-2003 (total) in the biomes | Area (in ‘000 km2) | % of biome covered |
---|---|---|
Amazon | 3542 | 85% |
Caatinga | 518 | 63% |
Cerrado | 824 | 40% |
Atlantic Forest | 527 | 48% |
Pampas | 112 | 63% |
Pantanal | 61 | 40% |
Coastal Marine | 2956 | 92% |
Total | 8540 |
Source: Data extracted from the polygons available in official Ministry of Environment databases in 2018.
In the next stage of the temporal analysis, to ascertain how much the PABCs are overlapped by federal protected areas per biome, the 2003 PABCs map (
Alongside the spatial analysis shown in
Graphic 1 and Graphic 2 indicate that in 2003, protected areas were mainly restricted to the highest priority PABCs. These data indicate that the protected areas created until then had an important function for conserving the most sensitive areas. However, lower coverage for areas of high priority, areas that were little known, and new areas known by regional groups.
Graphic 1. Geographical area overage of PABCs (2003) by each type of protected area. Legend: FP―full protection; SU―sustainable use.
Graphic 2. Percentage coverage of PABCs (2003) by each type of protected area. Legend: FP―full protection; SU―sustainable use.
The analysis of the coverage of PABCs (2003) per biome (
Graphic 3. Percentage coverage of PABCs (2003) per biome.
Graphic 4. Geographical coverage of PABCs (2003) per biome.
In the next stage of the temporal analysis, the PABCs superimposition with federal protected areas in each biome was ascertained, based on the 2007 PABCs map (
Alongside the spatial analysis in the map above, ascertaining the percentages per category of protected area. Also, PABC and their coverage in the biomes is important for finding out whether the areas indicated as priorities for conservation in 2007 continued to be a priority due to the introduction of new protected areas (of either category) and thereby received protection by law. Graphic 5 shows these data in geographical areas and Graphic 6 shows the percentages these areas represent in each category of protected area.
The graphics above indicate the PABCs mapping evolution between 2003 and 2007, showing a significant increase in the area and percentage coverage of PABCs by protected areas. However, the highest priority PABCs continue to be the protected areas. When the PABCs analysis mapped in 2007 addresses coverage of biomes, the data (
In this study, some inconsistency was found between the classes attributed to spatial data by IBGE’s biome polygons and by PROBIO’s PABCs. In practically
Graphic 5. Geographical area of PABCs (2007) covered by each type of protected area.
Graphic 6. Percentage of PABCs (2007) covered by each type of protected area.
Graphic 7. Geographical area of biomes covered by different classes of PABCs (2007).
Graphic 8. Percentage of biomes covered by different classes of PABCs (2007).
all the biomes, near their borders, there were found to be PABCs with a different classification from the biome class they were in. This could indicate that the coverage and definition of spatial elements for the environmental characterization of an area using geotechnical instruments are not absolute. And in this case, there could be divergences in the characterization and classification of elements superimposed with the biome polygons defined by IBGE.
This study was therefore done considering the IBGE borders of the different Brazilian biomes, assessing the PABCs coherence outside these borders but defined as belonging to the biome. The most representative cases were the Pantanal and the Atlantic Forest, in which several PABCs were found to be outside the borders of the biomes and with a different classification. This could thus interfere in the final percentages. In the Pantanal―the most emblematic case―large polygons outside the biome were ruled out of the analysis because they interfered significantly in the final results, potentially leading to a false diagnosis. This analysis was therefore done considering as many of the original attributes of the polygons from each of the themes as possible, assessing their spatial compatibility.
In view of the fact that the concept of conservation has been adapted and reformulated over time, the justifications and methods for defining protected areas reflect political priorities from the 1970s and 1980s, as opposed to the work done by PROBIO in 2004, updated in 2007. Further, it is worth noting that the institutions responsible for mapping the PABCs presented here used the same conceptions for conservation/preservation area. Thereby, it is generated areas with different levels of priority for each layer of information―protected area and PABC. In other words, one protected area could contain PABCs with different priority levels. Taking this assumption and drawing primarily on data on protected areas, in each biome, it was found that the protected areas are well aligned with the instrument used by the Ministry of the Environment. The instrument is used to define priority areas for biodiversity conservation covering much of their area. Those areas rose from 75% representativeness in the 2003 mapping to 98% in 2007. Almost the whole area covered by protected areas is considered to be important for environmental conservation.
One biome stands out amongst all the others: The Amazon. With a much larger geographical area, occupying almost 50% of the country, and with the greatest number of federal protected areas and PABCs, it accounts alone for over 80% of all the federal protected areas in Brazil, with 15% of its entire territory protected in this way. The Amazon is a particularly high-profile biome, attracting the attention of all sectors of national and international society and a whole host of diverse interests and actors. This leaves the other biomes at a relative disadvantage in terms of protection, which together account for around 20% of all the federal protected areas. In particular, the Cerrado and Atlantic Forest deserve special attention, as their rich diversity is under increasing threat, including several endangered species.
Greater attention should also be paid to the Caatinga, which has just 4% of the federal protected areas. Also, 4% of its geographical area protected by this mechanism. Our analysis of the quantity and quality of protection showed that the protected areas in the Caatinga have fewer use restrictions and have lower ecological priority than in the original protected areas (full protection) and PABCs (of the highest priority). The creation of new protected areas in this biome could be reviewed, not only for its biological value but also for its social value, considering the restrictions on use and level of threat (45%) in the Caatinga as identified by PROBIO.
The Cerrado accounts for 8.5% of the federal protected areas, but just 3% of this biome is actually federally protected areas. However, due to the great vulnerability and fragility of this ecosystem, new protected areas should be introduced within the area indicated by PROBIO. Also, priority should be given to create new protected areas in the PABCs classified as extremely high and very high priority, thereby curbing the impacts of the existing and growing trend to convert forested land into agriculture, amongst other pressures.
The Pantanal needs several measures―preferably in the short term―to accelerate the conservation process, because it has very few protected areas inside its borders―less than 1% coverage―and mainly because it receives waters from other regions, which exacerbates its vulnerability.
The Atlantic Forest should continue at the top of the priority list for nature conservation because it is one of the most devastated biomes, stretching back to colonial times. It would also be worth adopting measures to restore degraded areas in this biome by reforesting them. In a biome that has already suffered repeated cycles of degradation and had 48% of its area identified as a priority for conservation in 2007, it is concerning that 90% of its area has no legal protection.
The Pampas and the coastal marine ecosystem each have their own particularities: the Pampas is the smallest biome in geographical terms and the coastal marine ecosystem has few PABCs for its high level of priority. They both deserve attention because their conservation needs and capacities are greater than the currently provided. In the specific case of the Pampas, the introduction of managed forests to grassland areas is a growing and worrying phenomenon.
Environmental policy gained increasing pride of place on the government agenda and, in the same way, in civil society agenda, especially in the 1980s and 1990s. The work done by PROBIO in 2002, published in 2004, serves as a parameter for evaluating the protection provided by protected areas. The process began with discussions, followed by implementation, and, finally, the assessment of the areas, which inevitably included evaluating protected areas.
Despite the time lag since the most recent mapping, it is worth assessing how many of these priority areas for biodiversity conservation could be instated as protected areas regulated and recognized by the federal government, since these areas correspond to a significant portion of the nation’s geographical area.
The authors declare no conflicts of interest regarding the publication of this paper.
Steinke, V.A., da Silva Barbosa, S.M., de Miranda Mendes, V.J., Zanatto, V.G., Pessoa, G.E. and Bayma, G. (2018) Spatial Analysis of Federal Protected Areas and Priority Areas for Biodiversity Conservation in Brazil. Journal of Geographic Information System, 10, 718-734. https://doi.org/10.4236/jgis.2018.106037