scholarly journals Phylogenetic signal and major ecological shifts in the ecomorphological structure of stream fish in two river basins in Brazil

2015 ◽  
Vol 13 (1) ◽  
pp. 165-178 ◽  
Author(s):  
Camilo Andrés Roa-Fuentes ◽  
Lilian Casatti ◽  
Renato de Mei Romero
Keyword(s):  
Phylogenetic Signal ◽  
River Basins ◽  
Stream Fish ◽  
Neotropical Fishes ◽  
Sao Francisco River ◽  
Niche Differences ◽  
São Francisco River ◽  
Habitat Template ◽  
History Of ◽  
Ecological Shifts

We tested the contribution of the phylogenetic and specific components to the ecomorphological structure of stream fish from the upper Paraguai River and upper São Francisco River basins, and identified nodes in the phylogenetic tree at which major ecological shifts occurred. Fish were sampled between June and October of 2008 in 12 streams (six in each basin). In total, 22 species from the upper Paraguai River basin and 12 from the upper São Francisco River were analyzed. The ecomorphological patterns exhibited phylogenetic signal, indicating that the ecomorphological similarity among species is associated with the degree of relatedness. A strong habitat template is most likely to be the primary cause for a high phylogenetic signal. A significant contribution from the specific component was also detected, supporting the idea that the phylogenetic signal occurs in some clades for some traits, but not in others. The major ecological shifts were observed in the basal nodes, suggesting that ecological niche differences appear to accumulate early in the evolutionary history of major clades. This finding reinforces the role of key traits in the diversification of Neotropical fishes. Ecological shifts in recent groups could be related to morphological modifications associated with habitat use.

scholarly journals Community structure of aquatic insects (Ephemeroptera, Plecoptera, and Trichoptera) in Cerrado streams of Paraguay, Paraná, and São Francisco river basins

2013 ◽  
Vol 13 (1) ◽  
pp. 97-107 ◽  
Author(s):  
Renato de Mei Romero ◽  
Mônica Ceneviva-Bastos ◽  
Gustavo Henrique Baviera ◽  
Lilian Casatti
Keyword(s):  
Community Structure ◽  
Aquatic Insects ◽  
Regional Differences ◽  
River Basins ◽  
Taxonomic Composition ◽  
Taxonomic Resolution ◽  
Sao Francisco River ◽  
Original Distribution ◽  
São Francisco River

We evaluated qualitatively and quantitatively the community structure of aquatic insects (Ephemeroptera, Plecoptera, and Trichoptera) in 19 streams in areas of Cerrado in the Paraguay, Paraná, and São Francisco river basins. The number of genera and taxonomic composition were compared at spatial (at the hydrographic basins level) and conservation levels (more preserved and less preserved areas). The influence of spatial and environmental factors in richness and abundance was also evaluated. The geographical distribution of Grumicha, Coryphorus, and Austrotinodes was expanded. The highest Trichoptera richness was found in the São Francisco river basin (F = 5,602, p = 0,004) and a higher number of Ephemeroptera genera occurred in the relatively less preserved sites (F = 6,835, p = 0,009). The pattern of genera distribution was different among basins (R = 0,0336, p = 0,001), but it was similar among relatively less and more preserved areas (R = -0,039, p = 0,737). These findings can be explained by the low impact level in these streams and also by the taxonomic resolution used in this study. Latitude and instream diversity were the most important factors to explain the variation in genera richness and abundance (p = 0.004 and p = 0.026, respectively). Hence, the regional differences can be attributed to spatial influences, quantity or quality of habitats and the original distribution of taxa within each basin.

scholarly journals A poorly known case of watershed transposition between the São Francisco and upper Paraná river basins

2005 ◽  
Vol 3 (3) ◽  
pp. 449-452 ◽  
Author(s):  
Orlando Moreira Filho ◽  
Paulo Andreas Buckup
Keyword(s):  
River Basin ◽  
Fish Fauna ◽  
Rio Grande ◽  
River Basins ◽  
Hydroelectric Power ◽  
Sao Francisco River ◽  
Parana River ◽  
São Francisco River ◽  
Upper Paraná River ◽  
Parana Basin

During construction of the Furnas hydroelectric power dam in the upper rio Paraná basin in the early 1960s, the rio Piumhi drainage outflow was diverted into the headwaters of the São Francisco river basin. The rio Piumhi was a right bank tributary of the rio Grande, which unites with the rio Paranaíba to form the rio Paraná. The transposition allowed the entire fish fauna of the rio Piumhi and associated swamps, lakes, and tributaries to intermingle with the fish fauna of the São Francisco basin via the ribeirão Sujo, a right bank tributary of the São Francisco. The transposition of the watershed may have had a major impact on the current composition of the fish fauna of the upper rio São Francisco watershed.

scholarly journals Upstream and downstream migration speed of Prochilodus costatus (Characiformes: Prochilodontidae) in upper São Francisco basin, Brazil

2019 ◽  
Vol 17 (2) ◽  
Author(s):  
João de Magalhães Lopes ◽  
Carlos Bernardo Mascarenhas Alves ◽  
Alexandre Peressin ◽  
Paulo Santos Pompeu
Keyword(s):  
Swimming Performance ◽  
Upstream Migration ◽  
Migration Speed ◽  
Migratory Fish ◽  
Neotropical Fishes ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Migration Dynamics ◽  
Post Spawning ◽  
And Migration

ABSTRACT Details of migration dynamics of Neotropical fishes are poorly understood. This study aimed to examine upstream (spawning) and downstream (post-spawning) migration speeds, of curimatá-pioa (Prochilodus costatus) in the São Francisco River basin, southeast Brazil. Most upstream movements were recorded in October and November, in two well-defined migration windows, and downstream movements were frequent from December to March. Fish migrated upstream at an average migration speed of 34.4 km day-1 and no significant differences were detected in their speed between sexes and migration window they selected to migrate. No relationship was detected between upstream migration speed and biometric measures of tagged individuals. Upstream migrations speeds were significantly higher for fish that swam longer prior to reach telemetry stations in the same season, indicating that swimming performance may take some time to achieve its peak in upstream migration. Fish migrated downstream at an average migration speed of 97.7 km day-1, what is close to passive swimming in São Francisco River, and no significant differences in speed were detected between sexes or capture sites. The migration speeds measured here are the highest ever recorded for the genus Prochilodus and are among the highest reported for Neotropical migratory fish.

Two new species of Cyphocharax (Teleostei: Characiformes: Curimatidae) from headwaters of the Jequitinhonha and São Francisco river basins, Minas Gerais, Brazil

Zootaxa ◽  
2016 ◽  
Vol 4103 (2) ◽  
pp. 154 ◽  
Author(s):  
GUILHERME MOREIRA DUTRA ◽  
IAGO DE SOUZA PENIDO ◽  
GABRIEL CAETANO GUIMARÃES DE MELLO ◽  
TIAGO CASARIM PESSALI
Keyword(s):  
New Species ◽  
River Basins ◽  
Minas Gerais ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Two New Species

scholarly journals Ancestry and evolution of seasonal migration in the Parulidae

2011 ◽  
Vol 279 (1728) ◽  
pp. 610-618 ◽  
Author(s):  
Benjamin M. Winger ◽  
Irby J. Lovette ◽  
David W. Winkler
Keyword(s):  
Phylogenetic Signal ◽  
Rapid Change ◽  
Large Family ◽  
Seasonal Migration ◽  
Ancestral State ◽  
Migratory Behaviour ◽  
Wood Warbler ◽  
Wood Warblers ◽  
History Of ◽  
The Tropics

Seasonal migration in birds is known to be highly labile and subject to rapid change in response to selection, such that researchers have hypothesized that phylogenetic relationships should neither predict nor constrain the migratory behaviour of a species. Many theories on the evolution of bird migration assume a framework that extant migratory species have evolved repeatedly and relatively recently from sedentary tropical or subtropical ancestors. We performed ancestral state reconstructions of migratory behaviour using a comprehensive, well-supported phylogeny of the Parulidae (the ‘wood-warblers’), a large family of Neotropical and Nearctic migratory and sedentary songbirds, and examined the rates of gain and loss of migration throughout the Parulidae. Counter to traditional hypotheses, our results suggest that the ancestral wood-warbler was migratory and that losses of migration have been at least as prevalent as gains throughout the history of Parulidae. Therefore, extant sedentary tropical radiations in the Parulidae represent losses of latitudinal migration and colonization of the tropics from temperate regions. We also tested for phylogenetic signal in migratory behaviour, and our results indicate that although migratory behaviour is variable within some wood-warbler species and clades, phylogeny significantly predicts the migratory distance of species in the Parulidae.

A fossil record of land plant origins from charophyte algae

Science ◽  
2021 ◽  
Vol 373 (6556) ◽  
pp. 792-796 ◽  
Author(s):  
Paul K. Strother ◽  
Clinton Foster
Keyword(s):  
Fossil Record ◽  
Evolutionary History ◽  
Phylogenetic Signal ◽  
Land Plant ◽  
Fossil Plants ◽  
Fossil Plant ◽  
Molecular Phylogenetic ◽  
History Of ◽  
Time Gap ◽  
Evolutionary Continuity

Molecular time trees indicating that embryophytes originated around 500 million years ago (Ma) during the Cambrian are at odds with the record of fossil plants, which first appear in the mid-Silurian almost 80 million years later. This time gap has been attributed to a missing fossil plant record, but that attribution belies the case for fossil spores. Here, we describe a Tremadocian (Early Ordovician, about 480 Ma) assemblage with elements of both Cambrian and younger embryophyte spores that provides a new level of evolutionary continuity between embryophytes and their algal ancestors. This finding suggests that the molecular phylogenetic signal retains a latent evolutionary history of the acquisition of the embryophytic developmental genome, a history that perhaps began during Ediacaran-Cambrian time but was not completed until the mid-Silurian (about 430 Ma).

Candomblé e Cinema de Animação: Estratégias de resistência e territorialidade

2021 ◽  
Author(s):  
Pâmela Peregrino ◽  
Edileuza Penha de Souza
Keyword(s):  
Poetic Language ◽  
Public Places ◽  
Sao Francisco River ◽  
The People ◽  
São Francisco River ◽  
Popular Knowledge ◽  
Stop Motion ◽  
Short Movie

The majority of the knowledge and philosophy of African roots find a great discrimination in public places in Brazil, rarely we see schools take in consideration those questions, popular knowledge and ways of living of those who follow those religions of African roots. Take in account that reality and seeking for changing it, the members of Abassá of goddess Òsùn of Idjemim, Paulo Afonso - BA, Bahia took the initiative of producing an animated stop motion movie about the Òrìṣà Òsùn. In this short motion “Òpárà de Òsùn: when everything is born” (2018) we can see the language of animation cinema being used to tell stories of Òrìṣàs like of a way clamouring the religiosity from people from traditional places and also a way of facing religious racism. In this work, we will present the process of production of a short motion, that took in consideration the bio system Caatinga and of the Sao Francisco river as a scenery of some events, staring from the sonorities and images produced by the people in the Terreiro and including the poetic language (could it be sounding and visual or spoken). From those elements, we reflect about the role played by this short movie on the empowerment of children and territorially as didactic and educative space.

Sign in / Sign up

Export Citation Format

Share Document