Integration of research and management in optimizing multiple uses of reservoirs: the experience in South America and Brazilian case studies

Tundisi, José Galízia; Matsumura‐Tundisi, Takako

doi:10.1007/978-94-007-1084-9_17

Cited by 39 publications

(37 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Reservoirs comprise an integrated and complex system of relatively clean electricity generation, based on a renewable energy source. However, it causes deep socio-environmental changes and interferes in the structure and ecological functioning of the river basins (Tundisi and Matsumura-Tundisi, 2003;Nogueira et al, 2006;Agostinho et al, 2007;Nogueira et al, 2012). The first registers of golden mussel in the reservoir cascades of this region of La Plata were reported in the beginning of 2000's.…”

Section: Discussionmentioning

confidence: 99%

More than two decades after the introduction of Limnoperna fortunei (Dunker 1857) in La Plata Basin

Pessotto

Nogueira

2018

Braz. J. Biol.

View full text Add to dashboard Cite

The golden mussel, Limnoperna fortunei, is an Asian freshwater bivalve introduced in South America in the beginning of the 1990's, probably through ballast water releases in La Plata River estuary. It dispersed north through Paraná, Uruguay and Paraguay Rivers. The study evaluated the macroscale (18° to 34° S; 45° to 60° W) distribution of L. fortunei (larval stages) in the main rivers and reservoirs of La Plata Basin. Samplings were performed through 68 µm vertical plankton net hauls. Limnological variables were simultaneously determined. Larvae abundance correlated significantly with oxygen (positively) in summer, with temperature (positively) in winter and with total phosphorus and total nitrogen (both negatively) in winter. We expected densities to decrease towards north (latitudinal gradient) and increase in lentic conditions (reservoirs). Despite maximum density was found near the introduction point (La Plata River) similar value was also observed 2,000 km north (Paraguay River). The first hypothesis was refuted. The second hypothesis was partially accepted. Abundances were consistently higher in summer. Higher trophic conditions and fast flow seem to inhibit population growth. Food resources (chlorophyll a) locally influenced temporal variation. Limnoperna fortunei is widely distributed in La Plata basin, reaching high larval densities superior to 10,000 ind. m -3 , in all major sub-basins. The species exhibits a high intrinsic dispersal ability (free planktonic larvae), wide tolerance to environmental factors and dispersion is potentialized by natural dispersion processes (e.g. fauna displacement) and human facilitation (e.g. commercial navigation).Keywords: golden mussel, larval stage, Uruguay River, Paraguay River, Paraná River Duas décadas após a chegada de Limnoperna fortunei (Dunker 1857) na Bacia do PrataResumo O mexilhão dourado, Limnoperna fortunei, é um bivalve de água doce originário da Ásia e introduzido na América do Sul no início de 1990, provavelmente através da água de lastro liberada no estuário do rio La Plata. Dispersando-se para o norte através dos rios Paraná, Uruguai e Paraguai. Esse estudo avaliou a distribuição em macroescala (18° a 34° S; 45° a 60° W) de L. fortunei (estágios larvais) nos principais rios e reservatórios da bacia La Plata. Amostragens foram realizadas através de arrastos verticais com rede planctônica de 68 µm. Variáveis limnológicas foram simultaneamente determinadas. A abundância larval correlacionou-se significativamente com oxigênio (positivamente) no verão, com a temperatura (positivamente) no inverno e com fósforo total e nitrogênio total (ambos negativamente) no inverno. Esperávamos um decréscimo da densidade em direção ao norte (gradiente latitudinal) e aumento em condições lênticas (reservatórios). Apesar de a densidade máxima ter sido encontrada próximo do ponto de introdução (La Plata River) valores similares também foram observados 2.000 km ao norte (rio Paraguai). A primeira hipótese foi refutada. A segunda hipótese foi parcialmente aceita. Abu...

show abstract

Section: Discussionmentioning

confidence: 99%

More than two decades after the introduction of Limnoperna fortunei (Dunker 1857) in La Plata Basin

Pessotto

Nogueira

2018

Braz. J. Biol.

View full text Add to dashboard Cite

show abstract

“…This fact was already pointed out in studies conducted in Brazilian inland waters (Martinelli et al, 2002;Barbosa et al, 1993;Tundisi, 2003;Tundisi and Matsumura-Tundisi, 2003;Agostinho et al, 2005). However, long-term studies on biodiversity changes due to eutrophication are still unavailable for tropical inland waters.…”

Section: Introductionmentioning

confidence: 94%

Phytoplankton biodiversity changes in a shallow tropical reservoir during the hypertrophication process

Crossetti

Bicudo

et al. 2008

Braz. J. Biol.

View full text Add to dashboard Cite

Study aimed at evaluating phytoplankton biodiversity changes in a shallow tropical reservoir during its hypertrophication process. Samplings were carried out monthly during 8 consecutive years (1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004) in 5 depths. Conspicuous limnological changes in the reservoir derived from the presence and/or removal of the water hyacinth, characterized 3 different phases. Over the time series, reservoir changed from a typical polymictic eutrophic system to hypertrophic one, leading to a reduction of approximately 70 species (average 37%). Chlorophyceae accounted for the highest species richness (46%) among all algal classes and strictly followed total species richness variation. Internal feedback mechanisms intensification over phase III clearly promoted the sharp decrease in biodiversity. Highest decreases, mainly during springs, occurred simultaneously to the highest Cyanobacteria blooms. Increased turbidity due to heavy phytoplankton blooms suppressed all other algal groups, so that at the end of the present study even Cyanobacteria species richness decreased. Total dissolved phosphorous was included in most of the best selected models used to analyze the temporal patterns in species richness loss. Present data show that biodiversity loss following trophic change was not a single dimension of a single factor but, rather, a template of factors (e.g. light, stability) co-varying in consequence of the larger levels of biomass supported in the reservoir.Keywords: biodiversity loss, Cyanobacteria bloom, phosphorus, species richness, water hyacinth. Mudanças na biodiversidade fitoplanctônica em um reservatório tropical raso durante o processo de hipereutrofização ResumoEstudo avaliou as mudanças na biodiversidade da comunidade fitoplanctônica em um reservatório tropical raso durante processo de hipereutrofização. Foram realizadas amostragens mensais durante oito anos consecutivos (1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)) em cinco profundidades. Mudanças limnológicas conspícuas no reservatório foram a conseqüência da presença e/ ou remoção do aguapé, caracterizando três fases limnológicas. Durante a série temporal, o reservatório mudou de um sistema eutrófico polimítico típico para um sistema hipereutrófico, levando à redução de aproximadamente 70 espécies (média de 37%). Chlorophyceae foi a classe com a maior riqueza de espécies (46%) entre todas e seguiu, intimamente, a variação da riqueza total de espécies. A intensificação dos mecanismos internos de retroalimentação durante a fase III claramente promoveram uma acentuada queda da biodiversidade. Os decréscimos mais acentuados, especialmente durante as primaveras, ocorreram simultaneamente às maiores florações de Cyanobacteria. O aumento de turbidez provocado pelas florações maciças suprimiu outros grupos de algas de forma que, no final do presente estudo, até mesmo a riqueza de Cyanobacteria decaiu. Fósforo total dissolvido foi incluído na maioria dos melhores modelos selecionados para análise dos padrões temporais da p...

show abstract

“…Reservoirs are constructed for different purposes, including water storage, energy production, navigation, recreation, irrigation and flood control (Tundisi and Matsumura-Tundisi, 2003). Impoundments change the natural flow regime (Poff et al, 1997), which cause the reduction in water flow, the stabilization of water levels, the incorporation of terrestrial biomass and nutrients from surrounding areas and the alteration of limnological attributes (Agostinho et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Morphometric and biotic variables as potential predictors ofLudwigia sedoides(Humb. & Bonpl.) Hara in a large Amazonian reservoir

Barbosa

Kobayashi

Pelicice

2014

Ann. Limnol. - Int. J. Lim.

View full text Add to dashboard Cite

-Reservoirs cause hydrological changes (i.e., water level stabilization) that favor the colonization of aquatic macrophytes. Knowing the ecological factors that determine the occurrence of these plants is critical for water management (e.g., plant control) and biodiversity conservation. In this sense, the present study investigated colonization patterns of Ludwigia sedoides in Lajeado reservoir (Tocantins River, Amazon Basin), in order to identify variables that influence colonization at habitat scale. We investigated the relationship between colonization (coverage area and occurrence) and morphometric (fetch, slope, depth and distance from shoreline) and biotic variables (local diversity of macrophytes and co-occurrence patterns). Stepwise regression selected fetch, depth and slope as the best variables to explain the variation in L. sedoides coverage, which together explained 46% of data variability. Fetch and slope were negatively correlated with coverage, whereas depth showed a positive correlation. No biotic variable was included in the model (P > 0.05). However, the investigation of the geometric shape of bivariate correlations (null models) showed positive relationships with local species richness and richness of life forms (i.e., submerged, emergent, floating and epiphytic). In addition, an analysis of species co-occurrence (C-score) revealed that L. sedoides is negatively associated with some macrophyte species. We believe, however, that these results may be associated with species preferences for particular environmental conditions. In conclusion, the present study indicated that morphometric variables are potential predictors of the colonization of L. sedoides in Lajeado reservoir. Sheltered sites with low slope and moderate depths represent favorable environment for colonization and growth.

show abstract

Integration of research and management in optimizing multiple uses of reservoirs: the experience in South America and Brazilian case studies

Cited by 39 publications

References 8 publications

More than two decades after the introduction of Limnoperna fortunei (Dunker 1857) in La Plata Basin

More than two decades after the introduction of Limnoperna fortunei (Dunker 1857) in La Plata Basin

Phytoplankton biodiversity changes in a shallow tropical reservoir during the hypertrophication process

Morphometric and biotic variables as potential predictors ofLudwigia sedoides(Humb. & Bonpl.) Hara in a large Amazonian reservoir

Contact Info

Product

Resources

About