Brazilian coast

Ab’Sáber, Aziz Nacib

doi:10.1590/s0036-46652003000100016

Cited by 12 publications

(4 citation statements)

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“…Pleistocene sea levels fluctuated considerably through the glacial and interglacial periods during the Quaternary. During the Pleistocene, the coastal plain of the southern region of South America was larger than it is now [ 51 , 52 ]. Palaeo-geomorphological studies showed that the sea-level was about 120 m lower than present (Figs.…”

Section: Discussionmentioning

confidence: 99%

Phylogeography of the sand dune ant Mycetophylax simplex along the Brazilian Atlantic Forest coast: remarkably low mtDNA diversity and shallow population structure

et al. 2015

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BackgroundDuring past glacial periods, many species of forest-dwelling animals experienced range contractions. In contrast, species living outside such moist habitats appear to have reacted to Quaternary changes in different ways. The Atlantic Forest represents an excellent opportunity to test phylogeographic hypotheses, because it has a wide range of vegetation types, including unforested habitats covered predominantly by herbaceous and shrubby plants, which are strongly influenced by the harsh environment with strong wind and high insolation. Here, we investigated the distribution of genetic diversity in the endemic sand dune ant Mycetophylax simplex across its known range along the Brazilian coast, with the aim of contributing to the understanding of alternative phylogeographic patterns. We used partial sequences of the mitochondrial gene cytochrome oxidase I and nuclear gene wingless from 108 specimens and 51 specimens, respectively, to assess the phylogeography and demographic history of this species. To achieve this we performed different methods of phylogenetic and standard population genetic analyses.ResultsThe observed genetic diversity distribution and historical demographic profile suggests that the history of M. simplex does not match the scenario suggested for other Atlantic Forest species. Instead, it underwent demographic changes and range expansions during glacial periods. Our results show that M. simplex presents a shallow phylogeographic structure with isolation by distance among the studied populations, living in an almost panmictic population. Our coalescence approach indicates that the species maintained a stable population size until roughly 75,000 years ago, when it underwent a gradual demographic expansion that were coincident with the low sea-level during the Quaternary. Such demographic events were likely triggered by the expansion of the shorelines during the lowering of the sea level.ConclusionsOur data suggest that over evolutionary time M. simplex did not undergo dramatic range fragmentation, but rather it likely persisted in largely interconnected populations. Furthermore, we add an important framework about how both glacial and interglacial events could positively affect the distribution and diversification of species. The growing number of contrasting phylogeographic patterns within and among species and regions have shown that Quaternary events influenced the distribution of species in more ways than first supposed.Electronic supplementary materialThe online version of this article (doi:10.1186/s12862-015-0383-4) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Phylogeography of the sand dune ant Mycetophylax simplex along the Brazilian Atlantic Forest coast: remarkably low mtDNA diversity and shallow population structure

et al. 2015

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“…The mangrove complex of the Marajó Island can be observed between streams and on the banks of the Tocantins and Amazon rivers that drain the island and that flow into the bays and the Atlantic Ocean (Schaeffer-Novelli 2018). This complex is called the Marajoara Gulf (Ab'Saber & Holmquist 2001). In the municipality of Salvaterra, the mangroves have a well-known structure, with an arboreal stratum formed by Avicennia germinans , Laguncularia racemosa , Pachira aquatica Aubl., Pterocarpus officinalis Jacq., Rhizophora racemosa G.Mey and Virola surinamensis (Rol.…”

Section: Methodsmentioning

confidence: 99%

Spatial Distribution and Substrate Preferences of Bryophyte Species in Mangrove Ecosystems of the East Coast of Marajó Island, Brazil

Portal Gomes,

Simões,

Tavares-Martins

2023

Cryptogamie, Bryologie

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“…Disposed on a zoned area parallel to the Equatorial line, the LBA has a unique geomorphology and it is covered with a quite characteristic dense forest, considered the richest of all Earth's ecosystems, bordered by cerrados, a savannah type of vegetation [4]. Rainforest vulnerability is due to the thin soil systems that support the trees, whereas a wide range of life forms are fed by the thick layer of dead leaves, branches and animal corpses slowly decomposing underneath the tall wooden giants, subject to high temperature and humidity conditions.…”

Section: Contrasting Developing Optionsmentioning

confidence: 99%

Will Noah’s Ark depart from the Amazon River floodplains?

Madaleno¹

2009

WIT Transactions on Ecology and the Environment

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The Amazon rainforest constitutes the widest green spot on Earth. However, man's desire to exploit the incredible ground and underground natural resources is provoking destruction as deforestation pathways widen, rivers fall short on water and climate changes. Research undertaken in Brazil was aimed at the collection of local food, knowledge and practises, a quest intended to recover ancestral ecological experiences on a virtual Noah's Ark before the announced death of this Garden of Eden. This paper contrasts traditional agro-pastoral and extractive practises gathered among Caboclos along the Amazon River banks and floodplains with modern and capital-intensive agribusinesses settled alongside the BR-163 motorway. This contribution argues that ancestral environmentally friendly farming practises should be protected, both because they preserve the remainder of the woodland and its immense biogenetic richness and the Amazon Basin Rivers and their bounteous potential for life. Successful and long sustained cultivation on fertile riverbank alluvial soils, rebuilt by floods year after year, possesses a favourable demonstrative effect, valuable for other tropical sites, constituting a good array of best practises towards sustainable development.

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Brazilian coast

Cited by 12 publications

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Phylogeography of the sand dune ant Mycetophylax simplex along the Brazilian Atlantic Forest coast: remarkably low mtDNA diversity and shallow population structure

Phylogeography of the sand dune ant Mycetophylax simplex along the Brazilian Atlantic Forest coast: remarkably low mtDNA diversity and shallow population structure

Spatial Distribution and Substrate Preferences of Bryophyte Species in Mangrove Ecosystems of the East Coast of Marajó Island, Brazil

Will Noah’s Ark depart from the Amazon River floodplains?

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