Macroecologia, biogeografia e áreas prioritárias para conservação no cerrado

Diniz‐Filho, José Alexandre Felizola; Bini, Luis Maurício; Oliveira, Guilherme Resende; Barreto, Bruno de Souza; Silva, Marcel Müller Fernandes Pereira da; Terribile, Levi Carina; Rangel, Thiago Fernando L.V.B.; Pinto, Míriam Plaza; Sousa, Nayara Pereira Rezende de; Vieira, Ludgero Cardoso Galli; Melo, Adriano S.; Júnior, Paulo Marco; Vieira, Cleiber Marques; Blamires, Daniel; Bastos, Rogério Pereira; Carvalho, Priscilla; Ferreira, Laerte Guimarães; Telles, Mariana Pires de Campos; Rodrigues, Flávia Melo; Silva, Daniela de Melo e; Júnior, Nelson Jorge Silva; Soares, Thannya Nascimento

doi:10.4257/oeco.2009.1303.05

Cited by 29 publications

(17 citation statements)

References 89 publications

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“…This pattern has also been recorded for other taxonomic groups, such as for amphibians, reptiles, birds, and mammals (Diniz-Filho et al 2009). However, in the transition zones between biomes, there is great opportunity for the appearance of species from other biomes, that produces a high beta diversity in ecotones, as was observed between the Caatinga and the Cerrado (Castro et al 1998).…”

Section: Discussionsupporting

confidence: 65%

Tree species of South America central savanna: endemism, marginal areas and the relationship with other biomes

2016

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Biological knowledge is important for guidance of conservation polices. In the Cerrado, an extremely diverse biome, the last synthesis of floristic knowledge has more than ten years. To understand the progress on the information, our aim was quantify the tree species of the Cerrado, and assess their distribution. We compiled 167 inventories and rapid surveys of tree species, corresponding to 625 sites. We accessed the species distributions in the Brazilian biomes, and estimated the number of species in the savannas of Cerrado using four algorithms. We observed a greater local richness in more central regions of the biome, but due to high beta diversity, more peripheral regions presented a greater cumulative richness. The Atlantic Forest was the most important neighbouring biome, influencing the floristic composition of the Cerrado. The proportion of typical Cerrado species was 16%. The highest proportion of endemic species is possibly found in other life forms, and it is crucial that these species are included in inventories and floristic surveys. To guide new studies and help supplement the knowledge of the Cerrado's flora, we identified the main sampling gaps, located mainly in ecotonal regions, which are responsible for the largest number of species recorded in studies of the Cerrado.

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Section: Discussionsupporting

confidence: 65%

Tree species of South America central savanna: endemism, marginal areas and the relationship with other biomes

2016

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“…At a global scale the Cerrado is considered a biodiversity hotspot (Myers et al, 2000). For over six decades, much of its natural vegetation has been replaced by pastures and row crops (Diniz-Filho et al, 2009). The removal of the riparian vegetation increases erosion, turbidity and bed sedimentation, water temperature and the abundance of aquatic macrophytes, leading to habitat simplification and affecting the distribution, richness and abundance of aquatic macroinvertebrates (Chapman and Chapman, 2002;Kaufmann et al, 2009;Hughes et al, 2010;Kaufmann and Faustini, 2012).…”

Section: Study Areamentioning

confidence: 99%

Is the diet of a typical shredder related to the physical habitat of headwater streams in the Brazilian Cerrado?

Ferreira

Ligeiro

Macedo

et al. 2015

Ann. Limnol. - Int. J. Lim.

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-Macroinvertebrates are important for processing leaf detritus in temperate streams, but studies about their role in tropical streams often present conflicting results. Via digestive tract analyses, we assessed the diets of Phylloicus sp. larvae (Trichoptera: Calamoceratidae), collected from streams of two southeastern Brazil river basins (Araguari, Sa˜o Francisco). We classified gut contents as coarse particulate organic matter (CPOM), fine particulate organic matter (FPOM), algae, animal tissue, vascular plant tissue and mineral material. We hypothesized that the diets of Phylloicus larvae would be related to the physical habitat of the streams (e.g., riparian vegetation, organic matter availability and morphological characteristics), larval size and river basin. Although FPOM content predominated in both basins, we found greater CPOM content in Phylloicus larvae of Upper Sa˜o Francisco sites, and this food item was related to greater riparian vegetation canopy density. The FPOM content was greater in larvae of Upper Araguari sites, and this food item was correlated with greater instream brush cover. Algae, animal tissue, vascular plant tissue and mineral material were very rare in the digestive tracts, and therefore could not be explained. These results indicate the importance of riparian vegetation structure in modulating feeding habitats of macroinvertebrates. We conclude that the Phylloicus larvae had more flexibility in what they eat than we might expect based on their traditional classification as shredders. Therefore, trusting in published classifications, ignoring regional or local differences, may be inaccurate. Instead, regional studies of feeding habits are needed for accurate classifications of invertebrate taxa into trophic guilds.

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“…Aquatic environments are altered by a variety of external factors, including those of natural origin, such as floods and droughts, and also by anthropogenic ones, such as the construction of dams, urbanization, monoculture and pasture systems (Malmqvist & Rundle, ; Pompeu et al , ; Cunico et al , ; Barletta et al , ). In the Cerrado, which is the second major Brazilian biome, the main threats to biodiversity are related to two economic activities: intensive grain monoculture and extensive cattle ranching (Diniz‐Filho et al , ). These two activities have great potential for altering aquatic communities because they may trigger a series of effects that adversely affect aquatic ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Isotopic variation in five species of stream fishes under the influence of different land uses

Carvalho

Castro

Callisto

et al. 2015

Journal of Fish Biology

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The aim of this study was to test if changes in land use alter the isotopic signature of fish species, promoting changes in the trophic position and food resource partitioning between these consumers. Three different systems were investigated: pasture streams (n = 3), streams in sugar cane plantations (n = 3) and reference streams (n = 3). Fish species Aspidoras fuscoguttatus, Astyanax altiparanae, Characidium zebra, Hisonotus piracanjuba and Knodus moenkhausii were selected, and their nitrogen and carbon isotopic compositions were estimated to assess changes in the trophic level and partitioning of food items consumed. The composition of δ(13) C (‰) only differed among the land use categories for A. altiparanae, H. piracanjuba and K. moenkhausii. Resource partitioning was different for all species, with changes in the sources or proportions they consumed in each land use category, but only A. altiparanae introduced new food sources in large quantity in altered land uses. It is important to note, however, that the results from the resource partitioning analysis are limited due to large overlapping of isotopic signatures between the analysed food resources. All fish species exhibited variation in δ(15) N (‰), with the highest values found in streams under sugar cane or pasture influence. Despite the variation in nitrogen isotopic values, only C. zebra and H. piracanjuba displayed changes in trophic level. Therefore, it is believed that the increase in the δ(15) N (‰) value of the individuals collected in streams under the influence of sugar cane or pasture was due to the greater influence of livestock dung and chemical and organic fertilizers. The results also highlight the importance of studying consumer species along with all forms of resources available at each location separately, because the signatures of these resources also vary within different land uses.

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Macroecologia, biogeografia e áreas prioritárias para conservação no cerrado

Cited by 29 publications

References 89 publications

Tree species of South America central savanna: endemism, marginal areas and the relationship with other biomes

Tree species of South America central savanna: endemism, marginal areas and the relationship with other biomes

Is the diet of a typical shredder related to the physical habitat of headwater streams in the Brazilian Cerrado?

Isotopic variation in five species of stream fishes under the influence of different land uses

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