Morphometric aspects of two coexisting amphidromous shrimps, Atya gabonensis Giebel, 1875 and Atya scabra (Leach, 1816), in the Paraíba do Sul River, Brazil

Cyprinodontiformes fishes (guppies) are widely distributed in Neotropical regions and use deteriorated microhabitats in rivers where few species can occur. This study was carried out in a stretch of the Paraíba do Sul River in bracketing a large urban-industrial complex. The aim was to assess eventual effects that the industrial complex could have on distribution of two closely related fish species of guppies, Phalloceros caudimaculatus and Poecilia reticulata. The area was divided into three zones: Z1, 40 km upriver of the major urban-industrial complex of Volta Redonda; Z2, just down river of the complex; and Z3, 30 km down river of the complex. Six sites (two in each zone) were sampled monthly between November 1998 and October 1999, using a standardized fishing effort with cast net throws, trays lifts and seine hauls, covering different microhabitats, that is, riffles, pools and the proximity of the river's margins. Poecilia reticulata was widely distributed, peaking at Z2, the most polluted area, while P. caudimaculatus showed the highest abundance at Z3, being almost absent in Z1. Both species occurred in high numbers throughout the year but they were scarce between April and June. Females outnumbered males for both species in most size classes and at all sites. Juveniles were more abundant than adults, with non-pregnant females outnumbering pregnant ones. Condition factor was always higher in males than females but only males P. reticulata showed significant difference among the three zones, with the highest values at Z2. The higher number of females confirms the expectation that these species can use very polluted areas and that availability of food provided by organic loads allowed their distribution all over the area. Although these two species have shown indication of spatial separation in the study area, their similar seasonal patterns of occurrence suggest that they respond in a similar way to changes in environmental conditions.

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Os limites políticos de uma reforma incompleta: a implementação da lei dos recursos hídricos na Bacia do Paraíba do Sul

Revista Brasileira de Estudos Urbanos e Regionais ◽

10.22296/2317-1529.2008v10n1p61 ◽

2008 ◽

Vol 10 (1) ◽

pp. 61 ◽

Cited By ~ 3

Author(s):

Antônio A. R. Ioris

Keyword(s):

Water Resources ◽

Political Ecology ◽

Local Population ◽

Integrated Water Resources Management ◽

Proper Solution ◽

Economic Instruments ◽

Institutional Reforms ◽

Resources Management ◽

Water Charges ◽

Paraíba Do Sul River

Na última década, o uso e a conservação dos recursos hídricos no Brasil têm sido objeto de um amplo processo de reformas e reorganização institucional. A experiência da BaciaHidrográfica do Rio Paraíba do Sul foi selecionada como um exemplo paradigmático das reformas institucionais em andamento no país. Fazendo uso de métodos qualitativos de pesquisa, foram analisados os objetivos e as deficiências da nova decisória. O estudo identificou, como limitante fundamental, a afirmação de uma racionalidade tecnoburocrática, empregada tanto na avaliação de problemas, quanto na formulação de respostas. A expressão mais evidente é a importância estratégica atribuída à cobrança pelo uso da água, uma ferramenta de gestão altamente controvertida e que tem levado a uma polarização de posições políticas. Em larga medida, as reformas institucionais no Paraíba do Sul têm sido limitadas em si mesmas, uma vez que a nova estrutura ainda impede a incorporação das demandas da maioria da população local e a resolução efetiva de questões ambientais historicamente estabelecidas.Palavras-chave: hidropolítica; Ecologia Política; gestão integrada de recursos hídricos; cobrança pelo uso da água; instrumentos econômicos; Paraíba do Sul. Abstract: In the last decade, the use and conservation of water resources in Brazil have been the object of an ample process of reforms and institutional reorganization. The experience of the Paraíba do Sul River Basin was selected as a paradigmatic example of the institutional reforms ongoing in the country. Through qualitative research methods, the aims and the deficiencies of the new decision-making structure were analyzed. The study identified, as the crucial shortcoming, the affirmation of a technobureaucratic rationality, which is applied both to the assessment of problems and the formulation of responses. The most evident expression is the strategic relevance attributed to water use charges, a highly controversial management instrument that is leading to a polarization of political positions. The reforms in the Paraíba do Sul have been largely limited in themselves, given that the new institutional structure still prevents the incorporation of the demands of the majority of the local population and the proper solution to environmental questions historically established.Keywords: hydropolitics; Political Ecology; integrated water resources management; water charges; economic instruments; Paraíba do Sul.

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Pollutant Transport Studies in the Paraíba Do Sul River, Brazil

Water Pollution: Modelling, Measuring and Prediction ◽

10.1007/978-94-011-3694-5_12 ◽

1991 ◽

pp. 167-180

Author(s):

J. S. F. Roldão ◽

J. H. P. Soares ◽

L. C. Wrobel ◽

T. R. Büge ◽

N. L. C. Dias

Keyword(s):

Pollutant Transport ◽

Transport Studies ◽

Paraíba Do Sul River

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Vulnerability of small forest patches to fire in the Paraiba do Sul River Valley, southeast Brazil: Implications for restoration of the Atlantic Forest biome

Forest Ecology and Management ◽

10.1016/j.foreco.2020.118095 ◽

2020 ◽

Vol 465 ◽

pp. 118095

Author(s):

Betina J. Guedes ◽

Klécia G. Massi ◽

Cody Evers ◽

Max Nielsen-Pincus

Keyword(s):

Atlantic Forest ◽

River Valley ◽

Forest Patches ◽

Southeast Brazil ◽

Paraíba Do Sul River ◽

Forest Biome ◽

Small Forest

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Fish assemblage in a dammed tropical river: an analysis along the longitudinal and temporal gradients from river to reservoir

Neotropical Ichthyology ◽

10.1590/s1679-62252010000300004 ◽

2010 ◽

Vol 8 (3) ◽

pp. 599-606 ◽

Cited By ~ 22

Author(s):

Bianca de Freitas Terra ◽

Alex Braz Iacone dos Santos ◽

Francisco Gerson Araújo

Keyword(s):

Fish Assemblage ◽

Transitional Zone ◽

Assemblage Structure ◽

Fish Assemblage Structure ◽

Wet Season ◽

Tropical River ◽

Longitudinal Gradient ◽

Species Overlap ◽

Seasonal Flow ◽

Paraíba Do Sul River

We analysed changes in the fish assemblage structure along a longitudinal gradient of the Paraíba do Sul River and Funil Reservoir. We tested the hypothesis that shifts from lotic to lentic environment affect the richness and structure of the assemblage which are modulated by seasonal rainfall changes. Standardised monthly samplings were carried out from October 2006 to September 2007 in four zones: 1) river upstream from the reservoir; 2) upper part of the reservoir; 3) lower part of the reservoir, and 4) river downstream from the reservoir. Fishes were caught using gillnets deployed for 15 hours. We collected a total of 4550 specimens, representing 35 species and 5 orders. The highest richness and diversity were recorded in zone 2, the transitional zone between river and reservoir. In this ecotone, lotic and lentic species overlap. Greater abundance and biomass was recorded in the river upstream from the reservoir (zone 1); however, there are no differences between the zones in the structure of assemblages during the wet season. During the dry season, the assemblage structure is more differentiated between zones, although no differences in abundance and biomass occur. The seasonal flow of the river is the major driving factor to influence the fish assemblage structure along the longitudinal gradient from the river to the reservoir.

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Program Outcomes of Payments for Watershed Services in Brazilian Atlantic Forest: How to Evaluate to Improve Decision-Making and the Socio-Environmental Benefits

Water ◽

10.3390/w12092441 ◽

2020 ◽

Vol 12 (9) ◽

pp. 2441

Author(s):

Flávio Monteiro dos Santos ◽

Marcondes Coelho-Junior ◽

Jéssica Chaves Cardoso ◽

Vanessa Basso ◽

André de Paula Marques ◽

...

Keyword(s):

Decision Making ◽

Ecosystem Services ◽

Environmental Benefits ◽

Evaluation Methodology ◽

Payments For Ecosystem Services ◽

Program Outcomes ◽

Efficiency Performance ◽

Decision Making Processes ◽

Watershed Services ◽

Paraíba Do Sul River

In 2014, the Paraíba do Sul River Basin Integration Committee (CEIVAP) established its Pilot Program of Payments for Ecosystem Services (PES), focusing on water resources. The projects from this program share the same goal: to disseminate the use of PES as a tool for land management in watersheds. Contemplating 11 municipalities, including 84 landowners, conserving 718.63 ha and restoring 188.58 ha, this program was concluded in April 2020. Reviewing its historical and contextualizing features, we have observed that the outcomes from this program extend beyond these numbers. Here, we propose an evaluation methodology comparing the efficiency, performance, and impact of the PES projects. Based on new indicators that are easy to measure, we have identified key elements that have asymmetrically affected the projects. The complexity of the project scope and the execution of high-cost, and risky interventions on rural properties, have resulted in expensive projects with little tangible outputs. Our results support the upgrade of public policy for investment in ecosystem services by CEIVAP in the Paraíba do Sul watershed. In addition, our results can be more successful by improving the decision-making processes for similar projects in other watersheds.

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