Long-term morphologic and hydrologic effects on benthic invertebrates in a minor channel of the Paraná River floodplain (Argentina)

2014 ◽  
Vol 67 ◽  
pp. 134-143 ◽  
Author(s):  
Martín C.M. Blettler ◽  
Mario L. Amsler ◽  
Inés Ezcurra de Drago ◽  
Juan M. Bullo ◽  
Aldo R. Paira ◽  
...  
Keyword(s):  
Benthic Invertebrates ◽  
Paraná River ◽  
River Floodplain ◽  
Parana River ◽  
Paraná River Floodplain ◽  
A Minor

scholarly journals Long-term colonisation and propagule pressure of fish assemblages in a Neotropical floodplain

2021 ◽  
Author(s):  
Luis Artur Valões Bezerra ◽  
Simone Libralato ◽  
Jan Kubecka ◽  
Andre Padial
Keyword(s):  
Biological Invasions ◽  
Native Species ◽  
Fish Assemblages ◽  
Biotic Resistance ◽  
Propagule Pressure ◽  
Paraná River ◽  
River Floodplain ◽  
Parana River ◽  
Paraná River Floodplain

Abstract Biological invasions are a major threat to biodiversity in the Neotropical region. However, few studies have evaluated the mechanisms underlying the long-term establishment of fish propagules in aquatic environments. Here, we associated fish biomass, species richness, and proportion of non-native species (contamination index) to quantify propagule and colonisation pressures, and fish biodiversity (measured by the Kempton’s index) in lakes and rivers of the Parana River floodplain. We organised species into native and non-native assemblages sampled by gillnetting and beach seining in spatio-temporal gradients, seasonally, from 2000 to 2017. Native and non-native Kempton’s indices were inversely correlated, native extinctions occurred locally with non-native biotic differentiation in lakes, rivers, and ecosystem contamination. A constant propagule pressure resulted in an overwhelming biodiversity of non-natives at the end of the evaluated time series. Biotic resistance to introduction was not evidenced in our deterministic trends. The observed patterns agreed with previous studies highlighting native biotic homogenisation and species extinctions, depending on biological invasions, landscape connectivity, and riverine impoundments. Long-term propagule pressure and non-native fish colonisation were the drivers of biodiversity that led to the predominance of non-native over native assemblages in the Parana River floodplain.

Hydroecological implication of long-term flow variations in the middle Paraná river floodplain

2021 ◽  
Vol 603 ◽  
pp. 126957
Author(s):  
Elie Abrial ◽  
Rodrigo E. Lorenzón ◽  
Ana P. Rabuffetti ◽  
Martin C.M. Blettler ◽  
Luis A. Espínola
Keyword(s):  
Paraná River ◽  
River Floodplain ◽  
Parana River ◽  
Paraná River Floodplain ◽  
Middle Paraná

scholarly journals Biodiversity of zooplankton communities in the Upper Paraná River floodplain: interannual variation from long-term studies

2009 ◽  
Vol 69 (2 suppl) ◽  
pp. 539-549 ◽  
Author(s):  
FA. Lansac-Tôha ◽  
CC. Bonecker ◽  
LFM. Velho ◽  
NR. Simões ◽  
JD. Dias ◽  
...  
Keyword(s):  
Species Richness ◽  
Interannual Variation ◽  
Paraná River ◽  
Continuous Increase ◽  
River Floodplain ◽  
Parana River ◽  
Upper Paraná River Floodplain ◽  
Upper Paraná River ◽  
Paraná River Floodplain

We investigated the effect of interannual variation of hydrosedimentological regime and connectivity on the zooplankton biodiversity in the Upper Paraná River floodplain. Zooplankton samplings were undertaken between 2000 and 2007, in different environments of the floodplain, including connected and isolated floodplain lakes, backwaters, rivers and channels. The zooplankton included 541 species. Rotifers showed the highest species richness and abundance. Among the zooplankton species, 71 represent new occurrence records for the floodplain. The species accumulation curve showed a continuous increase in gamma diversity, demonstrating the importance of long-term research for accurate knowledge of biodiversity in heterogeneous and dynamic ecosystems, such as the floodplains. Interannual beta diversity among studied years indicated a lesser alteration in community composition in 2001, when a long limnophase period was observed. In most of the environments, the highest species richness values were related to the greatest flooding amplitudes. Flooding amplitude, which is associated with connectivity, favors faunal exchange amongst the environments and between the pelagic and littoral zones. This explains the occurrence of both planktonic and non-planktonic species within the community. On the other hand, mean zooplankton abundance values were higher when a long isolation period occurred. Differences between the potamophase and limnophase amplitude associated with connectivity among the environments were the most important factors for the structure and dynamics of the zooplankton community in the Upper Paraná River floodplain.

scholarly journals Phytoplankton functional and morphological groups as indicators of environmental variability in a lateral channel of the Upper Paraná River floodplain

2014 ◽  
Vol 26 (1) ◽  
pp. 98-108 ◽  
Author(s):  
Jascieli Carla Bortolini ◽  
Luzia Cleide Rodrigues ◽  
Susicley Jati ◽  
Sueli Train
Keyword(s):  
Environmental Conditions ◽  
Environmental Variability ◽  
Paraná River ◽  
River Floodplain ◽  
Parana River ◽  
Long Term Study ◽  
Upper Paraná River Floodplain ◽  
Upper Paraná River ◽  
Paraná River Floodplain

AIM: Models of phytoplankton functional classification based on functional (FGs) and morphological (MBFGs) traits can be an important tool in aquatic monitoring. In this long-term study on phytoplankton, the goal was to use these two approaches to explain the changes in this community in an active channel of the Upper Paraná River floodplain, depending on the environmental conditions imposed by the hydrosedimentological regime. METHODS: Samples were taken between 2000 and 2013. RESULTS: 196 taxa were identified. Bacillariophyceae and Cyanobacteria showed higher contribution to biovolume. Were recorded 11 FGs (A, C, E, H1, J, Lo, M, MP, N, P and X1). The FGs C, Lo, M, MP, P and X1 were common to both periods. Already the FGs A, E, H1 and J occurred only in limnophase, while the FG N occurred only in potamophase. Were recorded seven MBFGs (I, II, III, IV, V, VI e VII). All seven MBFGs occurred in both hydrological periods, however the MBFGs III, VI and VII contributed with high biovolume values mainly in the limnophase. The FG P and MBFG VI were indicator of eutrophic status, while the FG M and MBFG VII were indicators of mesotrophic status. Only FGs reflected the environmental variability. CONCLUSION: The classification of phytoplankton in FGs and MBFGs represented an important tool for understanding of the behavior and dynamics of the species in relation to environmental conditions. However, the FGs appear to be more related to environmental variation this lotic channel than MBFGs. Probably this is related to the refinement of this classification, which reflected the changes in the community, in long-term scale, influenced by local and regional characteristics imposed by the hydrosedimentological regime of the Paraná River.

NDVI patterns as indicator of morphodynamic activity in the middle Paraná River floodplain

Geomorphology ◽  
2016 ◽  
Vol 253 ◽  
pp. 146-158 ◽  
Author(s):  
Z.Y. Marchetti ◽  
P.G. Minotti ◽  
C.G. Ramonell ◽  
F. Schivo ◽  
P. Kandus
Keyword(s):  
Paraná River ◽  
River Floodplain ◽  
Parana River ◽  
Paraná River Floodplain ◽  
Middle Paraná

scholarly journals Periphytic and planktonic algae records from the upper Paraná river floodplain, Brazil: an update

Hoehnea ◽  
2018 ◽  
Vol 45 (4) ◽  
pp. 560-590 ◽  
Author(s):  
Bárbara Dunck ◽  
Maria Gabriela Junqueira ◽  
Andressa Bichoff ◽  
Matheus Vieira da Silva ◽  
Alfonso Pineda ◽  
...  
Keyword(s):  
Geographic Distribution ◽  
Paraná River ◽  
State University ◽  
Conservation Units ◽  
River Floodplain ◽  
Planktonic Algae ◽  
Parana River ◽  
Upper Paraná River Floodplain ◽  
Upper Paraná River ◽  
Paraná River Floodplain

ABSTRACT The upper Paraná river floodplain is a strategic area for the Brazilian biological and environmental patrimony and contains several conservation units. We aimed to record the occurrence and the geographic distribution of microalgae in this floodplain during 30 years of research carried out by the Center for Research in Limnology, Ichthyology and Aquaculture - State University of Maringá. We consulted 80 publications (national and international journals and books published from 1986 to 2016). We considered only published works that referenced algae at the generic and infrageneric levels. The results indicated 938 species of algae (562 periphytic, 482 planktonic), which 103 co-occur in the two habitats. Cosmarium was the richest genera for periphyton and Traquelomonas for phytoplankton. This study increased the knowledge of microalgae biodiversity in Brazil and provided data for future ecological and biogeographic studies.

Sign in / Sign up

Export Citation Format

Share Document