Abiotic variables in littoral-limnetic gradient of an oxbow lake of Mogi-Guaçu River floodplain, Southeastern, Brazil

Taniguchi, Glória Massae; Bicudo, Denise C.; Sennab, Pedro Américo Cabral

doi:10.1590/s1516-89132004000600016

Cited by 17 publications

(14 citation statements)

References 13 publications

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“…Similar patterns have been widely described (e.g., Tockner and Ward, 1999;Amoros and Bornette, 2002;Taniguchi et al, 2004;Thomaz et al, 2007;Palijan et al, 2008), and are caused mainly by the influence of local driving forces during low-water periods and by the increased connectivity and exchange of materials and organisms during high-water periods. The consequences for biodiversity maintenance can also be important, as highlighted by Thomaz et al (2007).…”

Section: Spatial Patternssupporting

confidence: 81%

“…This process occurs mainly during low-water periods, and is common in lakes of many river-floodplain systems (Esteves et al, 1994;Carvalho et al, 2001). Fertilization during high-water periods may also occur from river contribution and/or plant biomass decomposition, what also decreases oxygen in water column (Camargo and Esteves, 1995;Pagioro and Thomaz, 1999;Taniguchi et al, 2004;Thomaz et al, 2004;Bianchini Jr. et al, 2008). However, in the Paraná floodplain fertilization from rivers during floods is important only habitats connected to the Baía and Ivinheima rivers, which carry more nutrients than the Paraná River (see " Long-term trends", below).…”

Section: Spatial Patternsmentioning

confidence: 99%

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Limnology in the Upper Paraná River floodplain: large-scale spatial and temporal patterns, and the influence of reservoirs

2009

Braz. J. Biol.

178

141

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Knowledge of abiotic limnological factors is important to monitor changes caused by humans, and to explain the structure and dynamics of populations and communities in a variety of inland water ecosystems. In this study, we used a long term data-set (eight years) collected in 10 habitats with different features (river channels, and connected and isolated lakes) to describe the spatial and temporal patterns of some of the principal limnological factors. In general, the degree of connectivity of the lakes, together with the rivers to which the lakes are connected, were important determinants of their limnological characteristics. These differences are expected, because rivers entering the floodplain come from different geological regions and are subject to different human impacts. At large spatial scales, these differences contribute to the increased habitat diversity of the floodplain and thus to its high biodiversity. With regard to temporal variation, Secchi-disk transparency increased, and total phosphorus decreased in the Paraná River main channel during the last 20 years. Although these changes are directly attributed to the several reservoir cascades located upstream, the closing of the Porto Primavera dam in 1998 enhanced this effect. The increase in water transparency explains biotic changes within the floodplain. The lower-phosphorus Paraná River water probably dilutes concentrations of this element in the floodplain waterbodies during major floods, with future consequences for their productivity.Keywords: floodplain, abiotic factors, temporal and spatial variation, productivity. Limnologia na planície de inundação do Alto Rio Paraná: padrões em amplas escalas espaciais e temporais e influência de reservatórios ResumoFatores limnológicos abióticos têm sido importante para monitorar as mudanças causadas pelo homem e para explicar a estrutura e a dinâmica de populações e comunidades em uma variedade de ecossistemas aquáticos. Neste estudo, foram usados dados de vários anos (oito anos) coletados em 10 habitats com características distintas (rios, canais, lagoas isoladas e conectadas) para descrever padrões espaciais e temporais de alguns fatores limnológicos. Em geral, o grau de conectividade das lagoas com o rio ao qual estão conectadas foi importante para determinar as suas características limnológicas. Estas diferenças são esperadas porque os rios que chegam à planície de inundação vêm de diferentes regiões geológicas e estão sujeitos a diferentes impactos humanos. Em grandes escalas espaciais, tais diferenças contribuem para o aumento da diversidade de habitats da zona sujeita a inundações e assim, a sua alta biodiversidade. A respeito da variação temporal, observou-se um aumento nos valores de disco de Secchi e diminuição na carga de fósforo total no canal principal do rio Paraná nos últimos 20 anos. Embora estas mudanças estejam diretamente atribuídas ao efeito cascata de vários reservatórios a montante, o fechamento da represa de Porto Primavera em 1998 realçou este efeito. O aumento na trans...

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Section: Spatial Patternssupporting

confidence: 81%

Section: Spatial Patternsmentioning

confidence: 99%

Limnology in the Upper Paraná River floodplain: large-scale spatial and temporal patterns, and the influence of reservoirs

2009

Braz. J. Biol.

178

141

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“…Along this gradient, as the depth increases, reduction in heterogeneity of habitat is observed; hence, a reduction in species diversity is expected due to habitat simplification (Tolonen et al, 2003;Taniguchi et al, 2004). The high biomass of this invasive macrophyte can modify the chemical characteristics of water, with leaching of soluble chemical compounds during decomposition of deteriorating plant tissues altering pH characteristics (Strayer et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Forecasting the impact of an invasive macrophyte species in the littoral zone through aquatic insect species composition

Saulino

Trivinho‐Strixino

2017

Iheringia, Sér. Zool.

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ABSTRACT. Invasive macrophytes threaten freshwater ecosystem biodiversity. We analyzed the impact of the invasive white ginger lily (Hedychium coronarium J. König, Zingiberaceae) on aquatic insect assemblages living in the littoral zone of a tropical reservoir. We took aquatic insect samples in the littoral zone on four main vegetal profi le banks: white ginger monotypic bank, forest partially invaded, native macrophyte monotypic bank and riparian forest. At each vegetal bank, we measured abiotic variables such as dissolved oxygen, pH, water temperature and depth. We analyzed the aquatic insects through abundance, richness and Simpson diversity. We used the non-Metric Multidimensional Scaling (nMDS) analysis to analyze the spatial distribution of each assemblage, and Analysis of similarities (ANOSIM) to verify diff erences amongst dissimilarity distances. Additionally, we analyzed the main taxa associated with invasive macrophytes through indicator species analyses using IndVal index. We observed that the invasive macrophyte banks presented higher abundance of associated specimens, as well as lower dissimilarity of aquatic insect assemblages. Additionally, invasive macrophytes shifted the water pH and littoral depth of reservoir banks. The IndVal index indicated eight aquatic insects as indicator species. Labrundinia unicolor Silva, 2013, Ablabesmyia depaulai Neubern, 2013 and Diastatops Rambur, 1842 were indicator species on banks. We concluded that invasion of white ginger lily caused loss of shallow littoral habitat and altered the pH of the surrounding water probably by high decomposition rate and high production of plant biomass. We suggest the use of species of aquatic insects as indicator species to monitor white ginger lily impact in freshwater systems.

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“…The levels of DO under 100% of saturation together with values of super saturated total CO 2 suggested that the metabolism of the investigated tidal creeks was predominantly heterothrofic (Carmouze, 1994). According to Taniguchi (2004), the availability of DO affected nitrate concentration, determining nitrification and denitrification rates. This correlation was only observed in Perequê tidal creek, where a reduction of nitrate from the internal to the external station was found.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the water quality of tidal creeks of Pontal do Paraná, Paraná, Brazil

Siqueira

Godinho

Kolm

et al. 2009

Braz. arch. biol. technol.

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Abiotic variables in littoral-limnetic gradient of an oxbow lake of Mogi-Guaçu River floodplain, Southeastern, Brazil

Abstract: ABSTRACT

Cited by 17 publications

References 13 publications

Limnology in the Upper Paraná River floodplain: large-scale spatial and temporal patterns, and the influence of reservoirs

Limnology in the Upper Paraná River floodplain: large-scale spatial and temporal patterns, and the influence of reservoirs

Forecasting the impact of an invasive macrophyte species in the littoral zone through aquatic insect species composition

Evaluation of the water quality of tidal creeks of Pontal do Paraná, Paraná, Brazil

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