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Helder Mateus Viana Espírito-Santo

Helder Mateus Viana Espírito-Santo

PhD in Ecology
Currently in a sabbatical period

About

42
Publications
13,523
Reads
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683
Citations
Citations since 2017
17 Research Items
429 Citations
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2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
Introduction
I'm a PhD in Ecology with interest in understanding temporal changes in biological communities and the environmental cues related to them; the role of individual behaviour on population dynamics and species distribution; and the mechanisms related to individual differences in behaviour. For more information, please visit my website: https://sites.google.com/site/sitedoheldo/
Additional affiliations
August 2018 - August 2020
Federal University of Pará
Position
  • Professor
January 2017 - January 2020
Universidade Federal do Rio Grande do Norte
Position
  • PostDoc Position
March 2016 - May 2016
Australian National University
Position
  • Visitor Researcher
Education
March 2005 - April 2007
March 1999 - March 2004
Universidade Federal de Viçosa (UFV)
Field of study
  • Zootecnia (Animal Husbandry)

Publications

Publications (42)
Article
To determine the effect of rivers, environmental conditions, and isolation by distance on the distribution of species in Amazonia. Location: Brazilian Amazonia. Time period: Current. Major taxa studied: Birds, fishes, bats, ants, termites, butterflies, ferns ? lyco-phytes, gingers and palms. We compiled a unique dataset of biotic and abiotic inform...
Article
Full-text available
Different mating systems are expected to affect the extent and direction of hybridization. Due to the different levels of sexual conflict, the weak inbreeder/strong outbreeder (WISO) hypothesis predicts that gametes from self-incompatible (SI) species should outcompete gametes from self-compatible (SC) ones. However, other factors such as timing of...
Article
Mangrove killifishes of the genus Kryptolebias have been historically classified as rare because of their small size and cryptic nature. Major gaps in distribution knowledge across mangrove areas, particularly in South America, challenge the understanding of the taxonomic status, biogeographical patterns and genetic structuring of the lineages comp...
Article
Full-text available
Climate change is a major threat to biodiversity. Rainfall patterns over recent decades have changed and extreme events are intensifying. These are expected to affect the hydrological dynamics and structure of forest streams in the Amazon basin, which strongly depend on the local rainfall regime, with potential consequences for local fish assemblag...
Article
Full-text available
To determine the effect of rivers, environmental conditions, and isolation by distance on the distribution of species in Amazonia. Location: Brazilian Amazonia. Time period: Current. Major taxa studied: Birds, fishes, bats, ants, termites, butterflies, ferns ? lyco-phytes, gingers and palms. We compiled a unique dataset of biotic and abiotic inform...
Article
Different mating systems can strongly affect the extent of genetic diversity and population structure among species. Given the increased effects of genetic drift on reduced population size, theory predicts that species undergoing self-fertilisation should have greater population structure than outcrossed species; however, demographic dynamics may a...
Preprint
Full-text available
Different mating systems can strongly affect the extent of genetic diversity and population structure among species. Given the increased effects of genetic drift on reduced population size, theory predicts that species undergoing self-fertilization should have greater population structure than outcrossed species, however demographic dynamics may af...
Preprint
Full-text available
Hybridisation is a major source of evolutionary innovation. However, several prezygotic and postzygotic factors influence its likelihood and evolutionary outcomes. Differences in mating systems can have a major effect on the extent and direction of hybridisation and introgression. In plants, epigenetic mechanisms help to stabilize hybrid genomes an...
Article
Full-text available
Studies of fish assemblages have demonstrated that the main channels of rivers contain ichthyofauna adapted to this environment. However, information regarding the effects of temporal and spatial variations on this ichthyofauna is scarce. Using data from benthic fish assemblages in a major tributary of the Amazon basin collected during two consecut...
Article
Full-text available
Amphibious habits are present in a variety of fish and are allowed by a set of physiological, morphological and behavioural adaptations. The most intriguing question, however, is what motivates an aquatic organism to venture into the land? Unfavourable abiotic and biotic conditions in the aquatic environment have been reported as main stimuli for f...
Article
Full-text available
Temporal variations in the environment may function as disturbances that affect population processes and change the structure and composition trajectories of communities. The presence of refuges may buffer such variations and also support the recovery of communities after disturbances. In this study, we tested the effect of temporary pools as seaso...
Article
Full-text available
For species living in highly variable environments, the ability to perceive and respond to environmental cues by moving into favorable habitats should convey evolutionary advantages. Here we examined the spatial dynamics of an Amazonian pencil fish species that shows seasonally varying use of stream channel and temporary pool habitats. We hypothesi...
Article
Full-text available
During an ichthyological survey in September 2015 at the Ceará-Mirim River estuary, Rio Grande do Norte State, northeastern Brazil, we collected a male of Kryptolebias hermaphroditus, a cynolebiid species that had been previously described as containing exclusively self-fertilizing hermaphrodites. This is the first record of a male in this species,...
Article
Full-text available
Studies about fish assemblages in Brazilian streams have grown in recent years, however, it remains unclear whether this increase is followed by increments in the diversity of addressed topics and theoretical frameworks adopted by researchers. We performed a systematic search for Brazilian studies on stream fish assemblages recording study region,...
Book
Full-text available
This is a Guide for the Fishes of Reserva Ducke, a 10,000 ha Forest Reserva at Central Brazilian Amazon. The guide brings photos of alive specimens for almost all the 70 recorded species, together with a basic description and information on biology and natural history. Additionally, the book have a series of identification keys for all the families...
Article
Full-text available
A bacia Amazônica é mundialmente famosa pelas extensas áreas de florestas alagáveis, que são periodicamente inundadas durante as cheias dos grandes rios. Essas planícies são extremamente importantes para a produtividade dos rios (Junk et al., 1989) e são usadas como sítios de alimentação, reprodução e refúgio por uma infinidade de espécies de peixe...
Article
Full-text available
We present a synthesis of the first 10 years of Long Term Ecological Research project in Amazonian Forest. We elucidate the natural dynamics of forest ecosystem processes and associated biota, and its changes caused by distinct pressures of selective timber extraction and forest fragmentation. We found that, for both plants and animals, densities o...
Article
Full-text available
PUBLISHED SUMMARY 1. Macroecological comparisons have shown that habitat characteristics have a major influence on the evolution of life-history strategies of fishes in large river systems. Specifically, habitat variability and predictability seem to forge the reproductive strategies of fishes into a trilateral continuum with three main types: seas...
Article
Full-text available
Os lagos exercem um papel importante nos processos biogeoquímicos, ecológicos e hidrológicos no sistema rio-planície de inundação. O objetivo do presente estudo foi avaliar a dinâmica das condições limnológicas do lago Catalão, um lago da planície de inundação amazônica. Algumas das principais variáveis limnológicas (por exemplo, O2, temperatura, p...
Article
Full-text available
Due to the existence of terrestrial barriers to freshwater fish dispersion, it is believed that its distribution is strongly associated with historical factors related to the formation of the habitats they occupy. By the other hand, some studies reveal the influence of abiotic conditions (such as size of water bodies, pH, conductivity) on the compo...
Article
Full-text available
The lakes in the middle rio Doce Valley (MG) are suffering impacts due to the introduction of invasive fish species, mainly piscivorous species like red piranha Pygocentrus nattereri and peacock bass Cichla kelberi. Fishes were collected in bimonthly samples conducted at ten lakes along a year. The present study showed that the composition of nativ...
Article
Full-text available
Small headwaters streams of the Neotropical region usually have high species richness and diversity. This study aimed to investigate the species composition and abundance of fish fauna in the headwaters streams of the Madeira-Purus interfluvial plain in the Brazilian Amazon. A total of 22 streams of 1st to 3rd order were sampled during two expediti...
Article
Full-text available
Collecting freshwater zoological material for research purposes is common and necessary, but its impact on biological communities is often overlooked. We tested the impacts of a conventional ichthyological collection in small forest streams and showed that fish assemblages recover after a few months. We highlight ecological traits and habitat chara...
Article
1. The use of spatial variables is a common procedure in ecological studies. The technique is based on the definition of a connectivity/distance matrix that conceptually defines the dispersal of organisms. The shortest distance between two points is a straight line. Despite the fact that a straight line may not represent the easiest dispersal path...
Article
Planning of conservation priorities has often taken mapped forest types as surrogates for biological complementarity. In the Brazilian Amazon, these exercises have given equal weight to each forest type as if they were all equally distinct. Here, we examine floristic similarity between forest types to assess the reliability of vegetation maps as a...
Article
Full-text available
1. The effects of seasonal inundation on the biology of fishes on floodplains of large Amazonian rivers are well studied. However, the small seasonal changes in headwater streams are generally considered to have little effect on fish assemblages. 2. In this study, we analysed seasonal changes in the species composition and abundance of fish in smal...
Chapter
Full-text available
(An English abstract version is available below) Este capítulo de livro traz informações sobre aspectos de distribuição espacial e ecologia de peixes na Reserva Ducke, a mais bem estudada reserva brasileira de Floresta Amazônica de Terra-Firme. Descrevemos a composição da ictiofauna, com detalhes sobre riqueza e abundância das espécies e grupos tax...
Article
Full-text available
The present study shows the distribution of alien fish species in tropical lakes in the middle Doce river basin, southeastern Brazil, obtained from a rapid assessment program. The causes for their introductions were sport-fishing improvement in some specific lakes and aquaculture in the studied basin. Presently, these species have a wide distributi...
Article
Full-text available
The present study shows the distribution of alien fish species in tropical lakes in the middle Doce river basin, southeastern Brazil, obtained from a rapid assessment program. The causes for their introductions were sport-fishing improvement in some specific lakes and aquaculture in the studied basin. Presently, these species have a wide distributi...

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Projects

Projects (5)
Project
The mangrove killifishes occupy a wide geographic range (from central Florida - 29º N - to São Paulo state in Brazil - 23º S). Although three species are formally described by science, recent molecular evidences poses question to the geographical distribution, and even the validity, of the current known species. The main goals of this project are (i) to understand basic ecology of theses fishes, (ii) to undertand the current geographic distribution of the species and clades and (iii) to predict the future fate of the species and clades' distribution under different scenarios of climate change.
Project
This is a long-term ecological project (PELD) that aims to uncover the aquatic biodiversity in the Amazonian headwater streams (regionally called "igarapés"). The project has more than 15 years of life and represents a great contribution to the knowledge of natural history and ecology of fish and other aquatic organisms in a historically neglected ecosystem.