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Emas National Park and the Plight of the Brazilian Cerrados Kent H Emas National Park and the plight of the Brazilian cerrados Kent H. Redford Brazil's Emas National Park protects import- no trees or shrubs; (ii) cerrados {sensu stricto), or ant populations of the endangered pampas semi-arboreal scrubland; (iii) cerradao or tall deer, giant anteaters, armadillos, rheas and cerrado, characterized by a greater density of many other mammals and birds, but its road trees of higher stature and semi-open canopy; and river boundaries are not the best that and (iv) gallery forests or narrow strips of tall could be provided to protect this valuable tropical forest, usually non-deciduous, found cerrado Park. Uncontrolled fires are also a along permanent water courses or valleys where problem, killing giant anteaters and destroying the water table is close to the surface. gallery forest. The author spent two years doing research in central Brazil and visited the Emas National Park, which includes the largest Park many times. amount of cerrado, is situated on the border of Goias and Mato Grosso do Sul States in south- Brazil has an active national park programme and western Brazil (18°45' S and 52°45' E). It was has displayed great interest in preserving its established in 1961 and named after the rheas natural heritage in parks and biological reserves. Rhea americana abundant within its confines Approximately 1.0 per cent of the total land area (Anon., 1981). Located on the watershed be- of Brazil is preserved in national parks (Anon., tween the La Plata and Amazon River basins, 1982a). However, the different major vegetation Emas Park sits on the western edge of the Central types of Brazil are not all adequately represented Brazilian plateau, just before it degrades into the within these parks. The cerrado (sensu lato) Pantanal. The Park is drained by two small rivers, vegetation zone covers approximately 15-25 per the Jacuba and the Formosa, which arise within cent of Brazil (estimates vary; see Eiten, 1972), its boundaries. yet only approximately 11 per cent of the land within national parks is cerrado. The one park in Approximately 60 per cent of the Park's 131,868 which the cerrado is well represented, Emas hectares consist of grassland, most of the rest National Park, should be further enlarged to being cerrado or cerradao. Narrow strips of ensure the conservation of this vegetation type in gallery forest edge the rivers, and grassy swamps a national park. The threats to the integrity of with Mauritia palms mark the beginnings of Emas Park are symptomatic of the threats to the several small streams which feed these rivers. The cerrado as a whole. Jacuba River runs for a considerable distance through an open flood plain with only patches of The cerrado is Brazil's second largest vegetation bordering forest. This forest undoubtedly ex- formation, covering from one-and-a-half to two tended further before the arrival of farmers and million square kilometres (Anon., 1982a). In its ranchers. The forest at the source of the Jacuba is broadest sense, cerrado is defined as a xero- one of the only pieces of dry forest in the Park. morphic semi-deciduous arboreal savanna com- Virtually all of the other gallery forest stands on posed of several distinct subunits (Eiten, 1972). inundated ground, the forest itself being bordered These include (i) campos or open grasslands with by a narrow strip of perpetually inundated 210 OryxVoll9No4 Downloaded from https://www.cambridge.org/core. IP address: 170.106.202.58, on 30 Sep 2021 at 17:59:03, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0030605300025631 grassland. Large, open areas of swampy grass- land exist in two areas in the Park. Approximately 1500 mm of rain falls during the September to May wet season (Anon., 1981). During the rest of the year, virtually no rain falls and the temperature can exceed 35°C during the day. At night it can be cold, and every few years the Park experiences a frost that kills most of the foliage. Very little research has been done in Emas and it has only rarely been visited by non-Brazilians. Several teams have conducted brief surveys within the Park (Nogueira et al, 1978; Pereira et al, 1981; Schaller and Duplaix-Hall, 1975), and Erize (1977) reported on Emas in this journal. This situation is typical not only of Emas but of the whole cerrado region, as most researchers who have gone to Brazil have worked only in Amazonia. Pampas deer stag with antlers in velvet (KentH. Redford). Emas Park has been called 'Brazil's finest national park' (Erize, 1977), and all who have visited it gallery forest for food, water and shelter (Red- remark on the ease with which wildlife can be ford, 1983; Redford and Fonseca, 1985). Small observed. The mammalian fauna is typical of the groups of the endangered pampas deer Ozoto- cerrado zone, with many species relying on the ceros bezoarticus are common in the Park (Redford, in press) and represent the only size- able populations of this species protected in any national park. Emas also contains a good popu- lation of giant anteaters Myrmecophaga tri- dactyla. These lumbering creatures are commonly seen in and around the Park. At least seven armadillo and anteater species are found in Emas, along with tapirs, two species of peccaries, marsh deer Blastoceros dichotomus and 14 species of carnivores including maned wolves Chiysocyon brachyurus, bush dogs Speothos venaticus, jaguars Panthera onca and two otter species. Surveys of population size and habit requirements are urgently needed, for many of 15°S these are endangered species. A thorough mammal survey using live-traps and mist-nets is also needed as the Park probably contains many unrecorded species of mammals such as the fascinating fossorial echymid rodents Clyomys and Carterodon. Emas Park supports a rich and diverse avifauna. 20 °S R. Ridgley (pers. comm.) has recorded at least 50° 185 species during the dry season, and P. Antas (pers. comm.) reports that migratory birds such as Location of Emas Park (from Anon., 1981). roseate spoonbills Ajaia ajaja arrive during the Emas National Park and the Brazilian cerrados 211 Downloaded from https://www.cambridge.org/core. IP address: 170.106.202.58, on 30 Sep 2021 at 17:59:03, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0030605300025631 Giant anteater with young (Kent H. Redford). wet season. The most commonly seen birds in- larvae produce a faint yellow-blue light (Redford, clude rheas Rhea americana, seriamas Cariama 1982). cristata, grey monjitas Xolmis cinerea, and red- winged tinamous Rhynchotus rufescens. Rare With its expanses of grassland and cerrado cut by species include the dwarf tinamou Taoniscus lush gallery forest and its rich fauna, Emas nanus and the white-winged nightjar National Park is unique in South America. It Caprimulgus candicans, while the first Brazilian contains the largest expanse of conserved record of the rufous-rumped seedeater Sporo- cerrado in Brazil and rich concentrations of the phila hypochroma was made in the Park (R. cerrado fauna. However, the richness contained Ridgley, unpubl.). As with the mammals, many of in the Park is not safe due to two major factors: the bird species rely on the gallery forest and inappropriate boundaries and fire (Erize, 1977; would be extirpated if this habitat were destroyed Schaller and Duplaix-Hall, 1975; Redford, (Redford and Fonseca, 1985). 1981). When Emas Park was formed, the sur- rounding land was used for low-density cattle Perhaps the most impressive element of the fauna grazing and was virtually untouched. Now are the social insects. Termite mounds dominate (1981), two sides of the Park abut on soybean the open vegetation formations: there are an fields and a third on a heavily grazed ranch. estimated 25 million termitaria in the Empty insecticide and herbicide tins have been grassland of Emas Park (Redford, 1984). The tall found piled against the boundary fence, and run- mounds of Comitermes cumulans house nesting off from the fields carries agricultural chemicals. birds', provide shelter for many kinds of Even though the decree creating Emas stipulated mammals, reptiles and invertebrates, and are that the sources of the rivers entering the Park used as domiciles by many species of ants and were to be protected (Erize, 1977), a number of other termites. They assume the role of trees in streams that flow into the Park arise in un- the open campos. C. cumulans mounds also host protected springs located outside the Park and the larvae of a species oiPyrearinus beetle, which the Jacuba River serves as a Park boundary. provides one of the most impressive of Emas's Much of the gallery forest along the Jacuba River sights. For a few weeks at the beginning of the wet has been cut, decreasing important habitat for season, during early evening, the landscape is many species. The entire Park watershed needs transformed into a city of lights as millions of these protecting before it becomes further polluted; 212 Oryx Vol 19 No 4 Downloaded from https://www.cambridge.org/core. IP address: 170.106.202.58, on 30 Sep 2021 at 17:59:03, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0030605300025631 watercourses do not make appropriate boun- daries for parks. The other inappropriate boundaries are roads; two heavily travelled dirt roads serve as park boundaries. Despite an excellent fence, poachers and casual hunters frequently enter the Park from the roads. The second major threat to Emas Park is fire.
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