Paraiba do Sul
Jennifer Hales, Paulo Petry
Major Habitat Type
Tropical and subtropical coastal rivers
Drainages flowing into
Main rivers to other water bodies
Rio Paraíba do Sul, Rio Paraitinga, Rio Paraibuna Rio Pomba, Rio Muriaé, Lagoa Feia
This ecoregion includes the drainage basin of the Rio Paraíba do Sul and its tributaries. It is limited to the west by the Serra da Mantiqueira, the divide between the Paraíba do Sul basin and the São Francisco and Upper Paraná basins.
The Paraíba do Sul drains the Taubaté-Resende rift of the Serra do Mar (Great Escarpment) and Serra da Mantiqueira system, which forms one of the oldest drainage divides of the Brazilian Plateau (Martin et al. 1996; Modenesi-Gauttieri 2000; Dillenburg & Hesp 2009). The Paraíba basin is characterized by high relief with steep crystalline escarpments and alkaline massifs that rise 2600 m asl.
The Rio Paraíba do Sul starts at the confluence of the rios Paraitinga and Paraibuna and flows 1120 km northwest to the Atlantic Ocean. Its left and right bank tributaries drain from the Serra da Mantiqueira and Serra do Mar, respectively. The Paraíba’s discharge is 874 m3/s and sediment load is 10.9 x 106 t/yr (Dillenburg & Hesp 2009). Its upper middle section and coastal portion are navigable, but these are limited by rapids and waterfalls around São Fidélis. Historically, during high water the Paraíba do Sul flowed over into Lagoa Feia, a large complex of lakes south of the river’s mouth.
Several terrestrial ecoregions span the Paraíba do Sul basin, including Bahia interior forests in the Paraibuna, Pomba, and Muriae basins; Alto Paraná Atlantic forests bordering much of the main stem; and Serra do Mar coastal forests along the southern edge. Bahia interior forests comprise predominantly seasonal semi-deciduous forests. Alto Paraná Atlantic forests are also semi-deciduous forests that form a transition between the Serra do Mar coastal forests and cerrado further inland. The Serra do Mar coastal forests cover a strip of Atlantic moist forests along the Serra do Mar range. Pockets of restinga forests line the coast on nutrient-poor sandy soils (WWF 2001).
Description of endemic fishes
Despite the lower species richness, endemism is relatively high in the Paraíba do Sul, which has approximately 40% endemism at the species level. Seventy-eight percent of the trichomycterids are endemic, all within the genus Trichomycterus. There is also one endemic genus, Oligobrycon. This is represented by O. microstomus and is the only endemic characid in the ecoregion.
Other noteworthy fishes
Trichomycterus caipora is a newly described species from Lagoa Feia and Rio Macabu.
Justification for delineation
The Paraíba do Sul ecoregion falls within Southeastern Brazil’s coastal rivers ichthyographic province as outlined by Ringuelet (1975).
Level of taxonomic exploration
- Buckup, P. A., Menezes, N. A. and Ghazzi, M. S. (2007) Catálogo das espécies de peixes de água doce do Brasil Museo Nacional : Rio de Janeiro
- Dillenburg, S. and Hesp, P. (2009). "Geology and Geomorphology of Holocene Coastal Barriers of Brazil" Berlin, Germany: Springer-Verlag.
- Hijmans, R. J., S. Cameron and Parra., J. (2004) \WorldClim, Version 1.4 (release 3). A square kilometer resolution database of global terrestrial surface climate\ "<"[http://www.worldclim.org]">" (16 July 2009)
- Köppen, W. (1936). "Das geographische System der Klimate" Köppen W. and R. Geiger (Ed.) Handbuch der. Klimatologie ( (Vol. 1, pp. 1–44 ) Berlin, Germany: Gebrüder Borntröger.
- Lundberg, J. G., Marshall, L. G., Guerrero, J., et al. (1998). "The stage for Neotropical fish diversification: a history of tropical South American rivers" L. R. Malarbarba, R. E. Reis, R. P. Vari, Z. M. Lucena, C. A. S. Lucena and (eds) (Ed.) Phylogeny and classification of Neotropical fishes ( pp. 13-48 ) Porto Alegre: Edipuers.
- Menezes, N. A.,Weitzman, S. H.,Oyakawa, O. T.,Lima, F. C. T.,Castro, R. M. C.;Weitzman, M. J. (2007). "Peixes de Água doce da Matya Atlântica: Lista preliminar das espécies e comentários sobre conservação de peixes de água doce neotropicais" São Paulo: Museu de Zoologia - Universidade de São Paulo.
- Martin, L., Suguio, K., Flexor, J.-M., et al. (1996). "Coastal Quaternary Formations of the Southern Part of the State of Espírito Santo (Brasil)" Anais da Academia Brasileira de Ciências 68 (3) pp. 389-404.
- Modenesi-Gauttieri, M. C. (2000). "Hillslope deposits and the quarternary evolution of the Altos Campos - Serra da Matniqueira, from Campost do Jordão to the Itatiaia MassifI" Revista Brasileira de Geociências 30 (3) pp. 508-515.
- Reis, R. E., Kullander, S. O. and Ferraris, C. J., Jr. (2003) Check List of the Freshwater Fishes of South and Central America Edipucrs : Porto Alegre, RS
- Ringuelet, R. A. (1975). "Zoogeografía y ecología de los peces de aguas continentales de la Argentina y consideraciones sobre las áreas ictiológicas de América del Sur" Ecosur 2 (1) pp. 1-122.
- Serra, J. P., Fde Carvalho, F. R. and Langeani, F. (2007). "Ichthyofauna of the rio Itatinga in the Parque das Neblinas, Bertioga, São Paulo State: composition and bigeography" Biota Neotropical [online version] 7 (1) pp. http://www.biotaneotropica.org.br/v7n1/pt/abstract?article+bn01707012007.
- World Wildlife Fund (WWF) (2001) \Terrestrial Ecoregions of the World\ "<"http://www.worldwildlife.org/wildworld/profiles/terrestrial_nt.html">"