Cerrado
Cerrado | |
---|---|
Ecology | |
Realm | Neotropical |
Biome | tropical and subtropical grasslands, savannas, and shrublands |
Borders | |
Geography | |
Area | 1,910,037 km2 (737,469 sq mi) |
Countries | |
Conservation | |
Conservation status | Vulnerable |
Global 200 | Cerrado woodlands and savannas |
Protected | 433,581 km2 (23%)[1] |
The Cerrado (Portuguese pronunciation:
The second largest of Brazil's major habitat types, after the Amazonian rainforest, the Cerrado accounts for a full 21 percent of the country's land area (extending marginally into Paraguay and Bolivia).[3] About 75% of the Cerrado’s 2 million km2 is privately owned.[4]
Since then vast amounts of research have proved that the Cerrado is one of the richest of all tropical savanna regions and has high levels of endemism. Characterizing it by its enormous ranges of plant and animal biodiversity, World Wide Fund for Nature named the Cerrado the biologically richest savanna in the world, with about 10,000 plant species and 10 endemic bird species.[3] There are nearly 200 species of mammal in the Cerrado, though only 14 are endemic.[3] The large fraction of private ownership makes protection difficult though.[4]
Climate
The Cerrado's climate is typical of the wetter savanna regions of the world, with a semi-humid tropical climate. The Cerrado is limited to two dominant seasons throughout the year: Wet and dry. Annual temperatures for the Cerrado average between 22 and 27 °C and average precipitation between 80–200 cm for over 90% of the area.[5] This ecoregion has a very strong dry season during the southern winter (approx. April–September).[5]
Flora
The Cerrado is characterized by unique vegetation types.[5] It is composed of a shifting mosaic of habitats, with the savanna-like cerrado itself on well-drained areas between strips of gallery forest (closed canopy tall forest) which occur along streams.[6][5] Between the cerrado and the gallery forest is an area of vegetation known as the wet campo with distinct up- and downslope borders where tree growth is inhibited due to wide seasonal fluctuations in the water table.[5][6]
The savanna portion of the Cerrado is heterogeneous in terms of canopy cover. Goodland (1971)
Probably around 800 species of trees are found in the Cerrado.
Soil fertility, fire regime and hydrology are thought to be most influential in determining Cerrado vegetation. Cerrado soils are always well-drained and most are oxisols with low pH and low calcium and magnesium.[5][9] The amount of potassium, nitrogen and phosphorus has been found to be positively correlated with tree trunk basal area in Cerrado habitats.[10] Much as in other grasslands and savannas, fire is important in maintaining and shaping the Cerrado's landscape; many plants in the Cerrado are fire-adapted, exhibiting characters like thick corky bark to withstand the heat.[5]
Cerrado vegetation is believed to be ancient, stretching back perhaps as far in a prototypic form as the Cretaceous, before Africa and South America separated.[11] A dynamic expansion and contraction between cerrado and Amazonian rainforest has probably occurred historically, with expansion of the Cerrado during glacial periods like the Pleistocene.[12] These processes and the resulting fragmentation in multiple refugia have probably contributed to the high species richness both of the Cerrado and of the Amazonian rainforest.[5]
Fauna
The Cerrado has a high diversity of vertebrates, with 150 amphibian species, 120 reptile species, 837 bird species, and 161 mammal species recorded.[14] Lizard diversity is generally thought to be relatively low in the Cerrado compared to other areas like caatinga or lowland rainforest,[15] although one recent study found 57 species in one cerrado area with the high diversity driven by the availability of open habitat.[16] Ameiva ameiva is among the largest lizards found in the Cerrado and is the most important lizard predator where it is found in the Cerrado.[15] There is a relatively high diversity of snakes in the Cerrado (22–61 species, depending on site) with Colubridae being the richest family.[17] The open nature of the cerrado vegetation most likely contributes to the high diversity of snakes.[17] Information about Cerrado amphibians is extremely limited, although the Cerrado probably has a unique assemblage of species with some endemic to the region.[13]
Most birds found in the Cerrado breed there although there are some Austral migrants (breed in temperate South America and winter in the Amazon basin) and Nearctic migrants (breed in temperate North America and winter in the Neotropics) that pass through.
Gallery forests serve as primary habitat for most of the mammals in the Cerrado, having more water, being protected from fires that sweep the landscape and having a more highly structured habitat.
The insects of the Cerrado are relatively understudied.
History and human population
The first detailed European account of the Brazilian cerrados was provided by Danish botanist Eugenius Warming (1892) in the book Lagoa Santa,[26] in which he describes the main features of the cerrado vegetation in the state of Minas Gerais.[27]
Taking advantage of the sprouting of the herbaceous stratum that follows a burning in the Cerrado, the aboriginal inhabitants of these regions learned to use the fire as a tool, to increase the fodder to offer to their domesticated animals.
Until the mid-1960s, agricultural activities in the Cerrado were very limited, since natural cerrado soils are not fertile enough for crop production, directed mainly at the extensive production of beef cattle for subsistence of the local market.[5] After this period, however, the urban and industrial development of the Southeast Region has forced agriculture to the Central-West Region. The transfer of the country's capital to Brasília has been another focus of attraction of population to the central region: From 1975 until the beginning of the 1980s, many governmental subsidy programs were launched to promote agriculture, with the intent of stimulating the development of the Cerrado region.[29] As a result, there has been a significant increase in agricultural and cattle production.
On the other hand, the urban pressure and the rapid establishment of agricultural activities in the region have been rapidly reducing the biodiversity of the ecosystems, and the population in the Cerrado region more than doubled from 1970 to 2010, going from 35.8 to 76 million.[30]
Agriculture
The Cerrado was thought challenging for agriculture until researchers at Brazil's agricultural and livestock research agency,
Today the Cerrado region provides more than 70% of the beef cattle production in the country, being also a major production center of grains, mainly soya, beans, maize, and rice.
Charcoal production
Charcoal production for Brazil's steel industry comes in second to agriculture in the Cerrado.[8] They actually are quite intertwined. When land is being cleared to make more land for agriculture, the tree's trunks and roots are often used in the production of charcoal, helping to make money for the clearing. The Brazilian steel industry has traditionally always used the trunks and roots from the Cerrado for charcoal but now that the steel mills in the state of Minas Gerais are among the world's largest, it has taken a much higher toll on the Cerrado.[8] However, recently because of the conservation efforts and the diminishing vegetation in the Cerrado, they now are receiving some charcoal from the eucalyptus plantations and these efforts are growing.[8]
Rivers
The Cerrado biome is strategic for the water resources of Brazil. The biome contains the headwaters and the largest portion of South American watersheds (the Paraná-Paraguay, Araguaia-Tocantins, and São Francisco river basins) and the upper catchments of large Amazon tributaries, such as the Xingu and Tapajós. During the last four decades, the Cerrado’s river basins have been highly impacted by extreme deforestation, expansion of the agricultural and cattle ranching frontier, construction of dams, and extraction of water for irrigation.[36][non-primary source needed]
Conservation
The Cerrado is the second largest biome in South America and the most biodiverse savanna in the world. However, it is not currently recognized by the Brazilian Constitution as a National Heritage.[5] It is also home to the Guarani Aquifer, stores the largest fresh water underground reservoirs in South America, and supplies water to a third of the Amazon river and the largest basins in the continent.[37][38]
Brazilian agriculturalists and ministers regard it as having no conservation value, and the government has protected merely 1.5% of the Cerrado biome in Federal Reserves.[3] By 1994, an estimated 695,000 km2[29] of cerrado (representing 35% of its area) had been converted to 'anthropic [sic] landscape'.[27] In total, 37.3% of the Cerrado has already been totally converted to human use, while an additional 41.4% is used for pasture and charcoal production. The gallery forests in the region have been among the most heavily affected. It is estimated that only about 432,814 km2, or 21.3% of the original vegetation, remains intact today.[39]
During the last 25 years this biome has been increasingly threatened by industrial monoculture farming, particularly soybeans, the unregulated expansion of industrial agriculture, the burning of vegetation for charcoal and the development of dams to provide irrigation are drawing criticisms and have been identified as potential threats to several Brazilian rivers.[40][41][29]
This industrial farming of the Cerrado, with the clearing of land for eucalyptus and soy plantations, has grown so much because of various forms of subsidy, including very generous tax incentives and low interest loans. This has resulted in the establishment of a highly mechanized, capital intensive system of agriculture.[42] There is also a strong agribusiness lobby in Brazil and in particular, the production of soybeans in the Cerrado is influenced by large corporations such as ADM, Cargill and Bunge, these latter two directly associated with the mass deforestation of this biome.[43][44][37]
One issue with expanding this reserve is that research needs to be done to choose the location of these reserves because the Cerrado biome is floristically very heterogeneous and constitutes a biological mosaic.[29] Teams from the University of Brasília, CPAC and the Royal Botanic Garden Edinburgh have been collaborating on this project for a number of years supported by Brazilian, European Community and British funds. The project has recently been expanded into a major Anglo-Brazilian initiative, Conservation and Management of the Biodiversity of the Cerrado Biome, with UK Overseas Development Administration funding. Its aim is to survey the floristic patterns of Cerrado vegetation and to discover representative areas and biodiversity "hot-spots".[5]
Protected areas
A 2017 assessment found that 433,581 km2, or 23%, of the ecoregion is in protected areas.[1] Protected areas in Brazil include:
- Chapada das Mesas National Park
- Emas National Park
- Grande Sertão Veredas National Park
- Nascentes do Rio Parnaíba National Park
- Serra do Cipó National Park
- Nascentes Geraizeiras Sustainable Development Reserve
- Cavernas do Peruaçu Environmental Protection Area
- Iquê Ecological Station
- Serra Geral do Tocantins Ecological Station
- Jalapão State Park
- Serra de Santa Bárbara State Park
- Pireneus State Park
- Terra Ronca State Park
as well as
in Bolivia.
References
- ^ PMID 28608869.
- ^ Vasconcelos, Vitor Vieira; Vasconcelos, Caio Vieira & Vasconcelos, Davi Mourão (2010). Phyto-Environmental Characterization of Brazilian Savanna (Cerrado) and Brazilian Atlantic Forest, with the Research of Stone Lines and Paleosols (Report). Geografia. Vol. 14. Translated by Vasconcelos, Vitor Vieira. Brazil: Ensino & Pesquisa (UFSM). p. 3. Retrieved 6 October 2022 – via pt.scribd.com.
- The report, above, is a translation of the original publication:
- The report, above, is a translation of the original publication:
- ^ a b c d "Overview". BiodiversityHotspots.org. Cerrado. Conservation International. Archived from the original on 6 May 2008. Retrieved 9 May 2008.
- ^ S2CID 258258769.
- ^ .
- ^ S2CID 84400619.
- ^ JSTOR 2258321.
- ^ a b c d Herringer, E.P.; Barroso, G.M.; Rizzo, J.A. & Rizzini, C.T. (1977). Ferri, M.G. (ed.). A Flora do Cerrado [On the plants of the Cerrado]. IV SimpoUsio sobre o cerrado (in Portuguese). São Paulo, BR. pp. 211–232.
- JSTOR 2845050.
- JSTOR 2258929.
- ^ Ratter, J.A. & Ribeiro, J.F. (1996). "Biodiversity of the flora of the Cerrado". In Pereira, R.C. & Nasser, L.C.B. (eds.). Anais/Proceedings of the ... VIII Simpósio sobre o cerrado 1st Internet. Symposium on Tropical Savannas. Planaltina, DF, Brazil: EMBRAPA/CPAC. pp. 3–6.
- PMID 11125139.
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- ^ JSTOR 1564798.
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- ^ S2CID 84292266.
- ^ S2CID 31487530.
- ^ da Silva, J.S.C. (1996). "Distribution of Amazonian and Atlantic birds in gallery forests of the cerrado region, South America". Ornitologia Neotropical. 7: 1–18.
- ^ JSTOR 2388755.
- ^ Henriques, R.P.B. & Cavalcante, R.J. (2004). "Survey of a gallery forest orimate community in the cerrado of the Distrito Federal, central Brazil". Neotropical Primates. 12: 78–83.
- ^ .
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- JSTOR 2999724.
- ^ Warming, E. (1892). "Lagoa Santa: Et Bidrag til den biologiske Plantegeografi med en Fortegnelse over Lagoa Santas Hvirveldyr" [A contribution to the biological plant geography and a list of the vertebrates of Lagoa Santa]. Kongelige Danske Videnskabernes Selskabs Skrifter – Naturvidenskabelig og Mathematisk Afdeling [Publications of the Royal Danish Academy of Science - Division of Natural Sciences and Mathematics] (in Danish). 6 (3): 153–488.
- The above is the original. There are other, later French and Portuguese translations not listed here.
- ^ a b Oliveira S., Paulo & Marquis J., Robert (2002). The Cerrados of Brazil: Ecology and natural history of a neotropical savanna (e‑Book ed.). Columbia University Press.
- ^ "Brazilian mix". www.ispn.org.br. Peoples of the Cerrado. Brasília, DF, BR: Instituto Sociedade, População, e Natureza (ISPN) [Institute for Society, Population, and Nature]. Archived from the original on 17 August 2017. Retrieved 27 July 2017.
- ^ .
- ISBN 9781349558391
- ^ "Brazilian agriculture: The miracle of the Cerrado". The Economist. 26 August 2010.
- Observatory of Economic Complexity. MIT Media Lab. Cambridge, MA: Massachusetts Institute of Technology. Archived from the originalon 9 May 2019. Retrieved 27 July 2017.
- ^ Rohter, Larry (2 October 2007). "Scientists are making Brazil's savannah bloom". The New York Times. Retrieved 7 December 2015.
- ^ Spring, Jake (28 August 2018). "Appetite for destruction: Brazil's soy boom devours tropical savanna". Reuters investigates / Brazilian deforestation. Reuters.com (special report). Reuters. Retrieved 28 August 2018.
- ^ Lopes, A. Scheid (1996). "Soils under cerrado: A success story in soil management". Better Crops International. 10 (2): —.
- hdl:10356/137219. Retrieved 15 February 2020.
- ^ a b "The Cerrado: Brazil's other biodiverse region loses ground". e360.yale.edu. New Haven, CT: Yale University.
- ^ Pontes, Nadia (10 January 2017). "Secrets of the Brazilian Cerrado". Environment / Global Ideas. Deutsche Welle (DW).
- ^ Conservation International. [1] Access date: 31/08/2011
- S2CID 250575279.
- ^ Hilaire, Eric (22 December 2011). Disappearing Cerrado: Brazil's great untold environmental disaster. Environment. The Guardian (audio slideshow). London, UK. Retrieved 22 December 2011 – via guardian.co.uk.
- S2CID 59369320.
- ^ "Mystery meat". Mighty Earth. Archived from the original on 11 November 2020.
- ^ "Amazon deforestation, once tamed, comes roaring back". Business / Energy & environment. The New York Times. 24 February 2017. Retrieved 6 October 2022.[dead link]
- Oliveira, Paulo S. & Marquis, Robert J. (2002). The Cerrados of Brazil: Ecology and natural history of a neotropical savanna. New York, NY: ISBN 0-231-12043-5.
- BRANDÃO, M.; GAVILANES, M. L. (1992). Espécies árboreas padronizadoras do Cerrado mineiro e sua distribuição no Estado. Informe Agropecuário 16 (173): 5–11. (in Portuguese)
- BRANDÃO, M.; CARVALHO, P. G. S.; JESUÉ, G. (1992). Guia Ilustrado de Plantas do Cerrado. (in Portuguese) CEMIG.
- CASTRO, A. A. J. F., MARTINS F. R., TAMASHIRO, J. Y., SHEPHERD G. J. (1999). How rich is the flora of Brazilian Cerrados? Annals of the Missouri Botanical Garden 86 (1): 192–224.
- Coutinho, L.M. (c. 2000). "Cerrado". eco.ib.usp.br (in Portuguese). São Paulo: University of São Paulo. Archived from the original on 25 May 2019.
- RATTER, J.A.; RIBEIRO, J.F. & BRIDGEWATER, S. (1997) The Brazilian Cerrado vegetation and Threats to its Biodiversity. Annals of Botany, 80: pp. 223–230.
- LEITÃO FILHO, H.F. (1992). A flora arbórea dos Cerrados do Estado de São Paulo. Hoehnea 19 (1/2): 151–163. (in Portuguese)
- MENDONÇA, R. C.; FELFILI, J. M.; WALTER, B. M. T.; SILVA, M. C.; REZENDE, FILGUEIRAS, T. S.; NOGUEIRA, P. E. Flora vascular do bioma Cerrado. ("Vascular flora of Cerrado biome") (in Portuguese) IBGE[permanent dead link]
- Gottsberger, G. & Silberbauer-Gottsberger, I. (2006). Life in the Cerrado. Ulm, DE: Reta Verlag.
- ISBN 3-00-017928-3Volume 1
- ISBN 3-00-017929-1Volume 2
Further reading
- "Cerrado biodiversity hotspot". BiodiversityHotspots.org. Conservation International. Archived from the original on 5 March 2007.
- "The Chapada dos Veadeiros, Cerrado de Altitude". guiadachapada.com.br. Archived from the original on 30 January 2009.
- "Bioma Cerrado". www.agencia.cnptia.embrapa.br. EMBRAPA (in Portuguese). Brazilian Government. Archived from the original on 15 June 2020. Retrieved 30 April 2007.
External links
- "The Cerrado". Nature Conservancy in Brazil. Archived from the originalon 3 July 2010.
- "The Biodiversity of the Brazilian Cerrado". Archived from the original on 11 November 2007.
- "Cerrado". Brazilian Government. Archived from the original on 24 December 2005.
- "Cerrado". Terrestrial Ecoregions. World Wildlife Fund.
- Caton, Peter (1 June 2011). Guardians of the Cerrado. petercaton.co.uk (photo story). Aoki, Chris (contrib.); do Vale, João (music). Archived from the original on 2 September 2011 – via foto8.com.