Landscape genetics of Physalaemus cuvieri in Brazilian Cerrado: Correspondence between population structure and patterns of human occupation and habitat loss

2007 ◽  
Vol 139 (1-2) ◽  
pp. 37-46 ◽  
Author(s):  
Mariana Pires de Campos Telles ◽  
José Alexandre Felizola Diniz-Filho ◽  
Rogério Pereira Bastos ◽  
Thannya Nascimento Soares ◽  
Lorena Dall‘Ara Guimarães ◽  
...  
Keyword(s):  
Population Structure ◽  
Habitat Loss ◽  
Landscape Genetics ◽  
Brazilian Cerrado ◽  
Human Occupation

scholarly journals On Vastness and Variability: Cultural Transmission, Historicity, and the Paleoindian Record in Eastern South America

2015 ◽  
Vol 87 (2) ◽  
pp. 1239-1258 ◽  
Author(s):  
ASTOLFO G.M. ARAUJO
Keyword(s):  
Population Structure ◽  
South America ◽  
Material Culture ◽  
Cultural Transmission ◽  
Raw Material ◽  
Cultural Norms ◽  
South American ◽  
Human Occupation ◽  
Cultural Traditions ◽  
Early Human

Eastern South America, or what is today Brazilian territory, poses interesting questions about the early human occupation of the Americas. Three totally distinct and contemporaneous lithic technologies, dated between 11,000 and 10,000 14C BP, are present in different portions of the country: the Umbu tradition in the south, with its formal bifacial industry, with well-retouched scrapers and bifacial points; the Itaparica tradition in the central-west / northwest, totally unifacial, whose only formal artifacts are limaces; and the "Lagoa Santa" industry, completely lacking any formal artifacts, composed mainly of small quartz flakes. Our data suggests that these differences are not related to subsistence or raw-material constraints, but rather to different cultural norms and transmission of strongly divergent chaînes opératoires. Such diversity in material culture, when viewed from a cultural transmission (CT) theory standpoint, seems at odds with a simple Clovis model as the origin of these three cultural traditions given the time elapsed since the first Clovis ages and the expected population structure of the early South American settlers.

scholarly journals How diverse can rare species be on the margins of genera distribution?

AoB Plants ◽  
2019 ◽  
Vol 11 (4) ◽  
Author(s):  
Alice Backes ◽  
Geraldo Mäder ◽  
Caroline Turchetto ◽  
Ana Lúcia Segatto ◽  
Jeferson N Fregonezi ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Genetic Variation ◽  
Genetic Variability ◽  
Habitat Loss ◽  
Evolutionary History ◽  
Founder Effects ◽  
Geographical Isolation ◽  
Genetic Diversity And Structure ◽  
Genetic Patterns

Abstract Different genetic patterns have been demonstrated for narrowly distributed taxa, many of them linking rarity to evolutionary history. Quite a few species in young genera are endemics and have several populations that present low variability, sometimes attributed to geographical isolation or dispersion processes. Assessing the genetic diversity and structure of such species may be important for protecting them and understanding their diversification history. In this study, we used microsatellite markers and plastid sequences to characterize the levels of genetic variation and population structure of two endemic and restricted species that grow in isolated areas on the margin of the distribution of their respective genera. Plastid and nuclear diversities were very low and weakly structured in their populations. Evolutionary scenarios for both species are compatible with open-field expansions during the Pleistocene interglacial periods and genetic variability supports founder effects to explain diversification. At present, both species are suffering from habitat loss and changes in the environment can lead these species towards extinction.

Population structure of Annona crassiflora: an endemic plant species of the Brazilian Cerrado

2016 ◽  
Vol 15 (4) ◽  
Author(s):  
R. Gwinner ◽  
T.A. Setotaw ◽  
F.A. Rodrigues ◽  
D.V.C. França ◽  
F.A. da Silveira ◽  
...  
Keyword(s):  
Population Structure ◽  
Plant Species ◽  
Brazilian Cerrado ◽  
Endemic Plant ◽  
Annona Crassiflora ◽  
Endemic Plant Species

scholarly journals Landscape genetics and population structure in Valley Oak (Quercus lobata Née)

2015 ◽  
Vol 102 (12) ◽  
pp. 2124-2131 ◽  
Author(s):  
Mary V. Ashley ◽  
Saji T. Abraham ◽  
Janet R. Backs ◽  
Walter D. Koenig
Keyword(s):  
Population Structure ◽  
Landscape Genetics ◽  
Quercus Lobata ◽  
Valley Oak

The Effects of Habitat Loss on Genetic Diversity and Population Structure of Cedrela fissilis Vell.

2019 ◽  
Vol 12 (4) ◽  
pp. 282-292
Author(s):  
Flávio Bertin Gandara ◽  
Paulo Roberto Da-Silva ◽  
Tânia Maria de Moura ◽  
Fernanda Bortolanza Pereira ◽  
Cláudia Regina Gobatto ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Habitat Loss

scholarly journals Protecting forests at the expense of native grasslands: Land-use policy encourages open-habitat loss in the Brazilian cerrado biome

2019 ◽  
Vol 17 (1) ◽  
pp. 26-31 ◽  
Author(s):  
Juliana Bonanomi ◽  
Fernando R. Tortato ◽  
Raphael de Souza R. Gomes ◽  
Jerry M. Penha ◽  
Anderson Saldanha Bueno ◽  
...  
Keyword(s):  
Land Use ◽  
Habitat Loss ◽  
Land Use Policy ◽  
Brazilian Cerrado ◽  
Cerrado Biome ◽  
Open Habitat ◽  
Native Grasslands

Microsatellite markers for Bokermannohyla species (Anura, Hylidae) from the Brazilian Cerrado and Atlantic Forest domains

2014 ◽  
Vol 35 (3) ◽  
pp. 355-360 ◽  
Author(s):  
Renato C. Nali ◽  
Kelly R. Zamudio ◽  
Cynthia P.A. Prado
Keyword(s):  
Microsatellite Markers ◽  
Atlantic Forest ◽  
Landscape Genetics ◽  
Mating Systems ◽  
Brazilian Cerrado ◽  
Genetic Studies ◽  
Focal Species ◽  
Central Brazil ◽  
Polymorphic Microsatellite ◽  
Landscape Genetic

We characterized 22 polymorphic microsatellite markers for the Brazilian treefrog Bokermannohyla ibitiguara and tested their cross-amplification in B. alvarengai, B. circumdata and B. hylax. Our focal species occurs in protected and disturbed Brazilian Cerrado landscapes, a highly threatened savanna in central Brazil. Fourteen markers successfully cross-amplified for at least one congener. These microsatellites will be useful for studies of mating systems, relatedness and landscape genetics of Cerrado populations under various deforestation levels. Moreover, variable markers for B. circumdata and B. hylax will also be useful for landscape genetic studies of taxa typical of the threatened Atlantic Forest domain.

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