Temporal fish community responses to two cascade run-of-river dams in the Madeira River, Amazon basin

Ecohydrology ◽  
2017 ◽  
Vol 10 (8) ◽  
pp. e1889 ◽  
Author(s):  
Ariana Cella-Ribeiro ◽  
Carolina Rodrigues da Costa Doria ◽  
Jynessa Dutka-Gianelli ◽  
Hellison Alves ◽  
Gislene Torrente-Vilara
Keyword(s):  
Fish Community ◽  
Amazon Basin ◽  
Community Responses ◽  
Madeira River ◽  
Run Of River

scholarly journals Spatial segregation between Chalceus guaporensis and Chalceus epakros (Osteichthyes: Characiformes) in the Madeira River, Amazon Basin

2018 ◽  
Vol 48 (3) ◽  
pp. 239-247 ◽  
Author(s):  
Gislene TORRENTE-VILARA ◽  
Ariana CELLA-RIBEIRO ◽  
Marília HAUSER ◽  
Cristhiana RÖPKE ◽  
Maria Helena FREITAS ◽  
...  
Keyword(s):  
River Basin ◽  
Amazon Basin ◽  
Environmental Changes ◽  
Fish Passage ◽  
Dam Reservoirs ◽  
Madeira River ◽  
Northern Peru ◽  
Environmental Requirements ◽  
Floodplain Habitats ◽  
Run Of River

ABSTRACT Chalceus guaporensis is an endemic fish to the upper Madeira River whereas C. epakros is widespread in many rivers of the central and lower portions of the Amazon Basin, middle and upper Orinoco River Basin, the Essequibo River in Guyana and in the Nanay River in northern Peru. According to literature, both species do not occur in syntopy. We carried out ichthyological surveys along the Madeira River Basin and its rapids, and data on abundance, diet and habitat use were obtained for both species. Chalceus guaporensis and C. epakros are morphologically similar, occupying floodplain habitats and exploiting similar food resources. The former predominated upstream from the Jirau Fall, whereas the latter had most of its abundance bellow the last fall of the Madeira River; both species co-occurred along part of the rapids stretch and in the Machado River, but with strongly uneven abundances. This pattern may have developed in the past by speciation regarding the presence of the falls, while co-occurrence of the two species seems to be regulated by competitive interactions or maintained by slight differences in environmental requirements nowadays. The recent disruption of the Madeira River by two run-of-river dams built in cascade submerged a large portion of the rapids stretch and substituted it by semi-lenthic habitats created by the dam reservoirs, together with the construction of a fish passage. These environmental changes may allow the invasion of the upper reaches of the Madeira River by C. epakros, and disturb the population of endemic C. guaporensis.

scholarly journals Fish community responses and the temporal dynamics of recovery following river habitat restorations in Europe

2015 ◽  
Vol 34 (3) ◽  
pp. 975-990 ◽  
Author(s):  
Gregor Thomas ◽  
Armin W. Lorenz ◽  
Andrea Sundermann ◽  
Peter Haase ◽  
Armin Peter ◽  
...  
Keyword(s):  
Fish Community ◽  
Temporal Dynamics ◽  
Community Responses ◽  
River Habitat

Predicting fish community responses to environmental policy targets

2021 ◽  
Author(s):  
Io S. Deflem ◽  
Elina Bennetsen ◽  
Øystein H. Opedal ◽  
Federico C. F. Calboli ◽  
Otso Ovaskainen ◽  
...  
Keyword(s):  
Environmental Policy ◽  
Fish Community ◽  
Community Responses ◽  
Policy Targets

scholarly journals Triplodon chodo, a new species of pearly fresh water mussel from the Amazon Basin (Mollusca: Bivalvia: Unionoida: Hyriidae)

2008 ◽  
Vol 25 (1) ◽  
pp. 111-115 ◽  
Author(s):  
Maria C. D. Mansur ◽  
Daniel M. Pimpão
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Shell Height ◽  
Anterior Region ◽  
Obtuse Angle ◽  
Madeira River ◽  
Amazonas State ◽  
The Guianas ◽  
A New Species ◽  
Madeira River Basin

A new species of the genus Triplodon Spix, 1827 is described based on shell samples collected on Rivers Jamari (Rondônia State) and Aripuanã (Amazonas State) from the Madeira River Basin; on the Amazon at Oriximiná and on the mouth of Tapajós River at Alter do Chão (Pará State). Triplodon chodo is a new species considered closely related to T. stevensi Lea, 1871, (described from the part of the River Essequibo which borders the Guianas). Triplodon chodo is distinguished from the latter by its smaller, lighter shell, the absence of a wing in the anterior region and by the delicate shape of the external sculpture, which is composed of minuscule nodules organized in rows that converge and crosses on the centre of the valves. The straight and vertical posterior margin forms a right or slightly obtuse angle with the shell's dorsal and ventral margins. The anterior region is short, low and slightly tapering, with the distal extremity situated on the half of the shell height. The dorsal and ventral margins are equally curved.

Effects of natural rapids and waterfalls on fish assemblage structure in the Madeira River (Amazon Basin)

2011 ◽  
Vol 20 (4) ◽  
pp. 588-597 ◽  
Author(s):  
Gislene Torrente-Vilara ◽  
Jansen Zuanon ◽  
Fabien Leprieur ◽  
Thierry Oberdorff ◽  
Pablo A. Tedesco
Keyword(s):  
Fish Assemblage ◽  
Amazon Basin ◽  
Assemblage Structure ◽  
Fish Assemblage Structure ◽  
Madeira River

scholarly journals Age and growth of the Amazonian migratory catfish Brachyplatystoma rousseauxii in the Madeira River basin before the construction of dams

2018 ◽  
Vol 16 (1) ◽  
Author(s):  
Marília Hauser ◽  
Carolina R. C. Doria ◽  
Larissa R. C. Melo ◽  
Ariel R. Santos ◽  
Daiana M. Ayala ◽  
...  
Keyword(s):  
River Basin ◽  
Amazon Basin ◽  
Growth Parameters ◽  
Growth Patterns ◽  
Age And Growth ◽  
Growth Rings ◽  
Madeira River ◽  
Lower Maximum ◽  
Future Evaluation ◽  
Madeira River Basin

ABSTRACT The goliath catfish Brachyplatystoma rousseauxii has crucial economical and ecological functions in the Amazon basin. Although its life history characteristics have been studied in the Amazon, there is little information in the Madeira River basin, which holds genetically distinct populations and where dams were recently built. Using fish collected in Bolivia, Brazil and Peru, this study provides a validation of growth rings deposition and details the growth patterns of B. rousseauxii in the Madeira before the dams’ construction. Age structure and growth parameters were determined from 497 otolith readings. The species exhibits two growth rings per year and sampled fish were between 0 and 16 years old. In the Brazilian portion of the basin, mainly young individuals below 5 years old were found, whereas older fish (> 5 years) were caught only in the Bolivian and Peruvian stretches, indicating that after migrating upstream to reproduce, adults remain in the headwaters of the Madeira River. Comparing with previous publications, B. rousseauxii had a slower growth and 20 cm lower maximum standard length in the Madeira River than in the Amazon River. This study provides a baseline for future evaluation of changes in population dynamics of the species following dams closure.

scholarly journals Dataset of long-term monitoring of ground-dwelling ants (Hymenoptera: Formicidae) in the influence areas of a hydroelectric power plant on the Madeira River in the Amazon Basin

2018 ◽  
Vol 6 ◽  
pp. e24375 ◽  
Author(s):  
Itanna Fernandes ◽  
Jorge de Souza
Keyword(s):  
Power Plant ◽  
Amazon Basin ◽  
Hydroelectric Power Plant ◽  
Biodiversity Loss ◽  
Hydroelectric Power ◽  
Natural Ecosystems ◽  
Influence Area ◽  
Before And After ◽  
Madeira River ◽  
The Impact

Biodiversity loss is accelerating rapidly in response to increasing human influence on the Earth’s natural ecosystems. One way to overcome this problem is by focusing on places of human interest and monitoring the changes and impacts on the biodiversity. This study was conducted at six sites within the influence area of the Santo Antônio Hydroelectric Power Plant in the margins of the Madeira River in Rondônia State. The sites cover a latitudinal gradient of approximately 100 km in the Brazilian Amazon Basin. The sampling design included six sampling modules with six plots (transects) each, totaling 30 sampling plots. The transects were distributed with 0 km, 0.5 km, 1 km, 2 km, 3 km and 4 km, measured perpendicularly from the river margin towards the interior of the forest. For sampling the ground-dwelling ants, the study used the ALL (ants of the leaf litter) protocol, which is standardized globally in the inventories of ant fauna. For the purpose of impact indicators, the first two campaigns (September 2011 to November 2011) were carried out in the pre-filling period, while campaigns 3 to 10 (February 2012 to November 2014) were carried out during and after the filling of the hydroelectric reservoir. A total of 253 events with a total of 9,165 occurrences were accounted during the monitoring. The ants were distributed in 10 subfamilies, 68 genera and 324 species/morphospecies. The impact on ant biodiversity during the periods before and after filling was measured by ecological indicators and by the presence and absence of some species/morphospecies. This is the first study, as far as we know, including taxonomic and ecological treatment to monitor the impact of a hydroelectric power plant on ant fauna. Until recently, most studies conducted on hydroelectric plants, located in the Amazon Basin, were carried out after the implementation of dams in order to assess their impacts on the environment and biodiversity (Benchimol and Peres 2015, Latrubesse et al. 2017, Sá-Oliveira et al. 2015). Recent studies on dam impacts have begun to be conducted prior to dam implementation (e.g. Bobrowiec and Tavares 2017, Fraga et al. 2014, Moser et al. 2014), thus providing a better overview of the impact and a better assessment of its magnitude.

Sign in / Sign up

Export Citation Format

Share Document