Variação temporal e espacial das características limnológicas de um ecossistema lótico no Cerrado do Mato Grosso

Bleich, Monica Elisa; Silva, Carlos José da; Rossete, Amintas Nazareth

doi:10.5007/2175-7925.2009v22n2p161

Cited by 6 publications

(7 citation statements)

References 8 publications

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“…Simultaneously, more rare species, which live for only few months of the year as immature individuals, are recorded in the driest season (Brasil et al, 2017). In this work and others (e.g., Bispo et al, 2006;Yokoyama et al, 2012;Brasil et al, 2017), the relation of communities with the variation in the physico-chemical conditions of water was evident, mainly between dry and rainy seasons (Bleich et al, 2009). In addition, there are also intrinsic factors of the species such as the eclosion time of eggs, larval births, and voltinism that are important for its distribution throughout the year (Cayrou and Céréghino, 2005).…”

Section: Discussionsupporting

confidence: 63%

“…The physical and chemical conditions of the water are very important to jointly evaluate this spatiotemporal variation, since they vary in both time and space (Bleich et al, 2009;Giehl et al, 2015) and are important conditions for the establishment of aquatic insect communities (Couceiro et al, 2012). This was clear in our study when we observed that both the physical and chemical variables of the water, and the temporal filters, were related to Trichoptera composition (Tab.…”

Section: Discussionmentioning

confidence: 51%

“…This stream is part of the Tocantins basin, between the coordinates 14°36 0 to 14°44 0 S and 52°22 0 to 52°17 0 W (Fig. 1) with 5 km length, surround by natural vegetation (Marimon et al, 2002) and headwaters close to the Mario Viana Municipal Park (Bacaba Park) (Bleich et al, 2009). The Bacaba Park is composed by a mosaic of different Cerrado forms (grasslands, typical cerrado, cerrado sensu stricto, and cerrado woodlands) (Abad and Marimon, 2008) with predominance of livestock surrounding it (Bleich et al, 2009).…”

Section: Study Areamentioning

confidence: 99%

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Spatiotemporal dynamics in caddisfly (Insecta: Trichoptera) of a Cerrado stream, Brazil

Brasil

Santos

Vieira

et al. 2018

Ann. Limnol. - Int. J. Lim.

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Knowing the patterns and mechanisms that regulate spatiotemporal dynamics in aquatic communities is a great challenge. Theoretically, the distribution of aquatic insects is related to food and shelter availability, and/or to dispersal. In this perspective, we analyzed the spatiotemporal variation of Trichoptera communities of a Cerrado stream for 3 years. The longitudinal and temporal distribution provided a good explanation of the variation of the Trichoptera species composition. Specifically, 21.4 and 11.5% of the variation in composition was explained by longitudinal and temporal variation, respectively, and 8.3% by the interaction of both factors. The variation of environmental conditions (pH, total dissolved solids and dissolved oxygen) and temporal autocorrelation were the most important predictors for the distribution of Trichoptera communities. Accordingly, it is possible to assume that seasonal variation throughout the year is also an important factor for this aquatic community, in addition to water quality, as is widely known. Therefore, climate change should affect both temporal and spatial patterns of Trichoptera communities present in Cerrado streams. Consequently, such effect should be expected to occur in other regions with more marked seasons.

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Section: Discussionsupporting

confidence: 63%

Section: Discussionmentioning

confidence: 51%

Section: Study Areamentioning

confidence: 99%

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Spatiotemporal dynamics in caddisfly (Insecta: Trichoptera) of a Cerrado stream, Brazil

Brasil

Santos

Vieira

et al. 2018

Ann. Limnol. - Int. J. Lim.

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“…A temperatura da N1 teve as menores médias durante o período avaliado, refletindo as condições sensível às modificações no ambiente, aumentando as concentrações de materiais em suspensão na porção do córrego em que a vegetação foi retirada (Bleich et al, 2009 No período de seca, a temperatura foi maior para N4, diferindo de N1 e N2. No período de chuva, a N4 diferiu para as outras três nascentes estudadas, apresentando a maior temperatura.…”

Section: Parâmetros Qualitativos Da áGuaunclassified

Parâmetros Indicativos para Qualidade da Água em Nascentes com Diferentes Coberturas de Terra e Conservação da Vegetação Ciliar

Marmontel

Rodrigues

2015

Floresta Ambient.

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RESUMOO objetivo desta pesquisa foi avaliar e comparar a qualidade da água de quatro nascentes em diferentes coberturas de terra e conservação da vegetação no Córrego Pimenta. As coletas de água foram realizadas mensalmente durante um ano, avaliando dez parâmetros físico-químicos, sendo que os dados foram submetidos ao Teste de Tukey. A nascente um (N1) possui mata ciliar preservada; a nascente dois (N2) possui mata ciliar perturbada; a nascente três (N3) possui bambuzal e mata ciliar, e está degradada; a nascente quatro (N4) tem cobertura de pastagem e se encontra em degradação. As nascentes N1 e N2 tiveram os valores inferiores em temperatura, turbidez, cor, nitrato, nitrito e ferro, e valores próximos à neutralidade em pH. A N3 mostrou os valores inferiores para condutividade elétrica, TDS, salinidade e pH. As nascentes N1 e N2 indicaram que sete parâmetros foram melhores na qualidade da água, demonstrando que a mata ciliar auxilia em sua proteção qualitativa da água.Palavras-chave: nascente, mata ciliar, parâmetros físico-químicos, pastagem. Indicative Parameters for Water Quality in Water Springs with Different Land Cover and Conservation of Riparian Vegetation ABSTRACTThe objective of this study was to evaluate and compare the water quality of four water springs located in different land cover types and conservation of vegetation along the Pimenta stream. Water sampling was conducted monthly for one year. Ten physicochemical parameters were evaluated and data were submitted to the Tukey test. Water spring number one (N1) is located in an area of preserved riparian forest; water spring number two (N2) is located in an area of disturbed riparian forest; water spring number three (N3) is in an area of disturbed bamboo and riparian forest; and water spring number four (N4) is in a degrading area of pasture cover. N1 and N2 showed lower values for the parameters of temperature, turbidity, color, nitrate, nitrite and iron, and pH values close to neutral. N3 showed lower values for electrical conductivity, total dissolved solids (TDS), salinity and pH. The results found for N1 and N2 indicate that seven parameters were higher regarding water quality, which demonstrates that native vegetation can help protect water quality.

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“…Water cycle change in the southern and eastern portions of the Amazon basin indicates a transition towards a perturbation‐dominated flow, generated by agricultural expansion and climatic variability (Davidson et al ., ). Once streams are directly influenced by the drainage basin (Hynes, ), perturbations triggered by land use modification might modify habitat structure (Biggs et al ., ; Neill et al ., ; Bleich et al ., ; Coe et al ., ; Germer et al ., ; Clapcott et al ., ). Consequently, headwater stream degradation, or even loss, affects ecological connectivity to adjacent ecosystems and threatens biological and functional integrity of hydrographic networks (Meyer et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Structural Dynamics of Pristine Headwater Streams from Southern Brazilian Amazon

Bleich

André

Piedade

2015

River Research & Apps

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Amazonian headwater streams trail a heterogeneous landscape, with marked natural variation of geomorphological conditions and hydrological periods. Southern Brazilian Amazon is subjected to high degradation pressure, mainly from deforestation. Hence, we characterize pristine headwaters structure (hydromorphology and water physical-chemical variables) and variation among hydrological periods (dry, beginning of the rainy period and end of the rainy period), to define reference conditions for conservation-oriented classification, monitoring and rehabilitation of the southern Brazilian Amazon streams. Stretches of 10 pristine streams from the Teles Pires River, a major tributary of the Tapajós River, were analysed for hydromorphology, water physical-chemical variables and controlled for habitat integrity (forested proportion on buffer zones and habitat integrity index). We found variation among hydrological periods and spatial heterogeneity on pristine stream structure. Most variables showed great variation ranges at the same hydrological period and high variation coefficient values, reflecting the natural environmental heterogeneity among streams protected by a riparian forest. Variation among hydrological periods and spatial heterogeneity between streams in this region, combined with current high levels of deforestation, indicates the need for the conservation of a high proportion of streams and their respective riparian forests. Here, we have presented reference range values for monitoring and rehabilitation programs integrated in the Amazonian aquatic conservation efforts.

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Variação temporal e espacial das características limnológicas de um ecossistema lótico no Cerrado do Mato Grosso

Cited by 6 publications

References 8 publications

Spatiotemporal dynamics in caddisfly (Insecta: Trichoptera) of a Cerrado stream, Brazil

Spatiotemporal dynamics in caddisfly (Insecta: Trichoptera) of a Cerrado stream, Brazil

Parâmetros Indicativos para Qualidade da Água em Nascentes com Diferentes Coberturas de Terra e Conservação da Vegetação Ciliar

Structural Dynamics of Pristine Headwater Streams from Southern Brazilian Amazon

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