Limnological study of a Pantanal saline lake

Medina-Júnior, P. B.; Rietzler, Arnola C.

doi:10.1590/s1519-69842005000400013

Cited by 25 publications

(17 citation statements)

References 12 publications

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“…The "baías and salitradas" are freshwater lakes, with a pH ranging from 5 to 8, macrophytes are present inside and surrounding them, and during the flood period (rainy season) they are coalescent with other aquatic systems as "corixos and vazantes" (Barbiéro et al 2002). The "salinas" are alkaline lakes, isolated from other lakes by a stripe of dry land covered by savanna vegetation ("cordilheiras"), contain brackish water, pH >8, and the macrophytes are totally absent (Brum & Sousa 1985, Mourão et al 1988, Barbiéro et al 2002, Medina-Júnior & Rietzler 2005, Almeida et al 2011.…”

Section: Introductionmentioning

confidence: 99%

Diatoms From Shallow Lakes in the Pantanal of Nhecolândia, Brazilian Wetland

2012

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The diatom flora of the shallow lakes in the Pantanal of Nhecolândia is poorly known. Thus, our aim was to know the diatom biodiversity in three types of shallow lakes called "baías, salitradas and salinas", characterized by differences in pH, electrical conductivity, contact with the coalescent system and the presence of macrophytes. The samples were collected in dry and rainy seasons, from 2004 to 2007. For taxonomic identification, the material was cleaned with H 2 O 2 and analyzed using light microscopy. A total of 23 diatom species were identified and each lake presented a unique species richness and composition. The greatest species richness was found in the Baía da Sede Nhumirim (21 species), followed by the Salitrada Campo Dora (8 species) and finally the lowest species richness was observed in the Salina do Meio (3 species). Only Anomoeoneis sphaerophora Pfitzer var. sphaerophora and Craticula cf. buderi (Hustedt) Lange-Bertalot occurred in the three studied systems. Except for Eunotia binularis (Ehrenberg) Souza and Aulacoseira ambigua (Grunow) Simonsen, all the others are new records to the Brazilian Pantanal. Keywords: biodiversity; brackish water; freshwater; tropical wetland. RESUMODIATOMÁCEAS DE LAGOS RASOS DO PANTANAL DA NHECOLÂNDIA, ÁREA ÚMIDA BRASILEIRA. A flora de diatomáceas dos lagos rasos do Pantanal da Nhecolândia é pouco conhecida. Portanto, nosso objetivo foi conhecer a biodiversidade de diatomáceas que ocorrem em três diferentes tipos de lagoas denominadas de "baías, salitradas e salinas", caracterizadas por diferenças de pH, condutividade elétrica, contato com o sistema coalescente e presença de macrófitas. As amostras foram coletadas nos períodos de cheia e de seca, durante os anos 2004 a 2007. O material foi submetido à limpeza com água oxigenada (H 2 O 2 ) e analisado ao microscópio óptico para se proceder à identificação taxonômica. No total foram identificadas 23 espécies de diatomáceas e cada lagoa apresentou riqueza e composição de espécies distintas. A maior riqueza de espécies foi encontrada na Baía da Sede Nhumirim (21), seguida da Salitrada Campo Dora (8) e a Salina do Meio apresentou a menor riqueza de espécies (3). Somente Anomoeoneis sphaerophora Pfitzer var. sphaerophora e Craticula cf. buderi (Hustedt) Lange-Bertalot foram comuns aos três sistemas estudados. Com exceção de Eunotia binularis (Ehrenberg) Souza e Aulacoseira ambigua (Grunow) Simonsen, as demais espécies são citadas pela primeira vez para o Pantanal brasileiro. Palavras-chave: biodiversidade; água doce; água salobra; áreas úmidas tropicais. RESUMEN DIATOMÁCEAS DE LOS LAGOS RASOS DEL PANTANAL DENHECOLÂNDIA, ÁREA HÚMEDA BRASILERA. La flora de diatomeas de los lagos rasos del Pantal de Nhecolândia es poco conocida. Por lo tanto, nuestro objetivo fue conocer la biodiversidad de diatomáceas que ocurren en tres diferentes tipos de lagos rasos denominados de "baías, salitradas e salinas" caracterizadas por diferencias en el pH, la conductividad eléctrica, contacto con el sistema coalescente y la presencia ...

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Section: Introductionmentioning

confidence: 99%

Diatoms From Shallow Lakes in the Pantanal of Nhecolândia, Brazilian Wetland

2012

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“…To answer this question, more information about the number, location, geochemistry and biological importance of these ecosystems is required. It is known, however, that these hundreds of small lakes present varying degrees of productivity and coalescence with the flooding regime of the Pantanal (Medina-Ju´nior and Rietzler, 2005), serve as a nesting, food and mineral source for wildlife (Por, 1995), and possibly represent a significant number of lakes in the Pantanal.…”

Section: Discussionmentioning

confidence: 99%

Mapping and monitoring lakes in the Brazilian Pantanal wetland using synthetic aperture radar imagery

Costa

Telmer

2007

Aquatic Conservation

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ABSTRACT1. The Pantanal wetland in South America is being threatened by human development, such as the construction of hydropower dams in the upper Paraguay River and the Hydrovia. The consequences of these developments are difficult to predict, but will potentially cause irreversible loss of habitat and biodiversity.2. Radar satellite imagery can be used to establish baseline information that is crucial for monitoring changes in this region. In the case of the Pantanal, the pixel spacing of the imagery is a major concern if the goal is to count, map, and monitor lakes. To address this, Radarsat and JERS-1 data were acquired and used to produce a series of coarser-resolution images in order to understand the capabilities of the various resolutions to map Pantanal lake ecosystems. The simulations included resolutions of the existing JERS-1 mosaics (100 m resolution) and the proposed ALOS/PALSAR mosaics (50 m resolution).3. Using the 15 m data it was found that in the Nhecolaˆndia region of the Pantanal, only about 7% of lakes have an area larger than 0.2 km 2 , 47% have an area larger than 0.05 km 2 , and 50% are smaller than 0.05 km 2 . Therefore, it is important to consider the substantial number of lakes smaller than 0.05 km 2 . 4. The size of the errors in determining lake area depends on lake size, lake shape, and the image pixel spacing } long and small lakes have greater errors, and 100 m resolution images show unacceptable errors. The error in estimating lake area associated with the pixel spacing of the Radarsat ScanSAR image is 12.5% and 25%, and for the proposed mosaics of ALOS/PALSAR it is 30% and 47% for lakes larger and smaller than 0.05 km 2 respectively. Therefore, based on simulated results, the spatial resolution of the observing SAR was an important determining factor in the capacity to discriminate small lakes in the Pantanal.

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“…Para elaborar a lista dos copépodos de vida livre de Mato Grosso do Sul (MS) foram compilados dados dos seguintes estudos: Mourão (1989), Reid & Moreno (1990), Lansac-Tôha et al (1993), Musarra et al (1995), Espíndola et al (1996), Sendacz (2001), Choueri et al (2005), Medina-Júnior & Rietzer (2005), Frutos et al (2006), Silva & Roche (2006), , Silva et al (2008), Lansac-Tôha et al (2009), Silva (2009 e Silva et al (2009a,b). As coletas se concentraram em pontos do rio Paraguai, pontos no rio Paraná, ao longo do rio Miranda e em algumas lagoas naturais ou represas (Fig.…”

Section: Methodsunclassified

“…A riqueza de táxons de Cyclopoida inventariadas em MS (26) representa apenas uma pequena parcela das 148 espécies de Cyclopoida neotropicais ou das 110 neotropicais do Hemisfério Sul (Silva, 2008 , 2009Choueri et al, 2005); 2, Lagoas marginais do Rio Paraná em Bataguaçu (Musarra et al, 1995); 3, Lagoas marginais do Rio Paraná sob o reservatório Porto Primavera (Sendacz, 2001); 4, Lago do Amor, cidade de Campo Grande (Silva & Roche, 2006;Silva et al, 2009a); 5, Lagoas da Fazenda Nhumirim, Pantanal da Nhecolândia (Mourão, 1989;Reid & Moreno, 1990;Medina-Júnior & Rietzer, 2005;Silva et al, 2009b); 6, Lagoa Albuquerque, rio Paraguai (Espíndola et al, 2006); 7, Rio Paraguai, regiões de Corumbá e Porto Murtinho (Frutos et al, 2006); 8, Rio Miranda (Silva & Roche, 2006); 9, Baía da Medalha, Rio Miranda ; 10, Corumbá (Silva, 2009). …”

Section: Riquezaunclassified

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Checklist dos Copepoda (Crustacea) de vida livre do estado de Mato Grosso do Sul

Rosa

Silva

2017

Iheringia, Sér. Zool.

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ABSTRACT. Checklist of the free-living Copepoda (Crustacea) from Mato Grosso do Sul state. This checklist gathered the free-living Copepod information from Mato Grosso do Sul State. It was recorded 20 species for Calanoida, 26 for Cyclopoida and four for Harpacticoida. That diversity was similar to Mato Grosso State located in north frontier and quite diff erent to São Paulo State in the east frontier. Part of this diff erence could be explain by the greater area sampled in Paraguai River Basin when compares to the sampled area in the Paraná River Basin. The main ways for the knowledge increase of Copepoda in the state of Mato Grosso do Sul were discussed.

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Limnological study of a Pantanal saline lake

Cited by 25 publications

References 12 publications

Diatoms From Shallow Lakes in the Pantanal of Nhecolândia, Brazilian Wetland

Diatoms From Shallow Lakes in the Pantanal of Nhecolândia, Brazilian Wetland

Mapping and monitoring lakes in the Brazilian Pantanal wetland using synthetic aperture radar imagery

Checklist dos Copepoda (Crustacea) de vida livre do estado de Mato Grosso do Sul

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