Palaeoenvironmental dynamics and underlying climatic changes in southeast Amazonia (Serra Sul dos Carajás, Brazil) during the late Pleistocene and Holocene

Hermanowski, Barbara; Costa, Marcondes Lima da; Carvalho, Aliane Trinidade; Behling, Hermann

doi:10.1016/j.palaeo.2012.09.030

Cited by 51 publications

(49 citation statements)

References 73 publications

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“…Palaeodistribution models show that M. flexuosa populations expanded and contracted during glacial cycling throughout the Neotropics (de Lima et al., 2014; Lima‐Ribeiro, Barberi, & Rubin, 2004), with its fossil pollen record persisting in central Amazonia throughout the Quaternary (Hermanowski, Costa, & Behling, 2012; Hermanowski, Costa, Carvalho, & Behling, 2012). …”

Section: Discussionmentioning

confidence: 99%

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Rivers shape population genetic structure in Mauritia flexuosa (Arecaceae)

Sander

Pérez-Zavala

Silva

et al. 2018

Ecology and Evolution

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The Mauritia flexuosa L.f. palm is known as the “tree of life” given its importance as fundamental food and construction resources for humans. The species is broadly distributed in wet habitats of Amazonia and dry habitats of the Amazon and Orinoco river basins and in the Cerrado savanna. We collected 179 individuals from eight different localities throughout these habitats and used microsatellites to characterize their population structure and patterns of gene flow. Overall, we found high genetic variation, except in one savanna locality. Gene flow between populations is largely congruent with river basins and the direction of water flow within and among them, suggesting their importance for seed dispersal. Further, rivers have had a higher frequency of human settlements than forested sites, contributing to population diversity and structure through increased human use and consumption of M. flexuosa along rivers. Gene flow patterns revealed that migrants are sourced primarily from within the same river basin, such as those from Madeira and Tapajós basins. Our work suggests that rivers and their inhabitants are a critical element of the landscape in Amazonia and have impacted the dispersal and subsequent distribution of tropical palm species, as shown by the patterns of genetic variation in M. flexuosa.

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Section: Discussionmentioning

confidence: 99%

“…Other outcrossing tropical species such as Inga (Fabaceae) species of the Peruvian Amazon (Rollo et al, 2016) and other widespread and abundant palms like Euterpe precatoria (Santos et al, 2015) also have high genetic variation. Hermanowski, Costa, Carvalho, & Behling, 2012).…”

Section: Genetic Variation Is Structured Within Populations Of Amazmentioning

confidence: 99%

Rivers shape population genetic structure in Mauritia flexuosa (Arecaceae)

Sander

Pérez-Zavala

Silva

et al. 2018

Ecology and Evolution

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“…Fluctuations in the distribution of rainforest, seasonal dry forest, savanna, and grassland are evident in ecotonal areas (Hermanowski et al, 2012;Mayle et al, 2009), but knowledge of the composition of the vast central basin of the Amazon during the Quaternary is still very limited. Hill of Six Lakes, an inselberg in lowland Brazil, contains the only long pollen record located well within the limits of the contemporary Amazon forest.…”

Section: Biogeography and Biodiversitymentioning

confidence: 99%

Nature and causes of Quaternary climate variation of tropical South America

Baker

Fritz

2015

Quaternary Science Reviews

172

158

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“…Map shows the location of Hill of Six Lakes (small green box) and of Lake Pata (Google Earth image) in relation to modern drier quarter precipitation in Amazonia (Hijmans, Cameron, Parra, Jones, & Jarvis, ) and other palaeoclimate records (letters) discussed in the text. CH: Chaplin, BV: Bella Vista (Mayle et al, ), LG: Laguna Granja, OR: Orícore (Carson et al, ), PK: Parker, GT: Gentry (Bush, Silman, Toledo, et al, ), HM: Huanchaca Mesetta swamp (Maezumi et al, ), SA: Lagoa do Saci (Fontes et al, ), CJ: Carajás (Absy, et al, ; Alizadeh et al, ; Cordeiro et al, , ; Hermanowski, Costa, Carvalho, & Behling, ; Reis et al, ; Sifeddine et al, ; Turcq et al, ), SC: Sarucuri, Santa Maria, Lagoa Comprida, Lagoa Geral (Bush et al, ; M.B Bush, Silman, Toledo, et al, ), TJ: (Irion et al, ), CL: Colombian Llanos Savannahs (Behling & Hooghiemstra, ; Berrio, Hooghiemstra, Behling, Botero, & Borg, ; Wijmstra & van der Hammen, ), JA: Jacaré Lake (De Toledo, ), M4: Maxus 4 wetland (Weng et al, ). Dashed line: charcoal analysis at the road connecting the cities of Cuiabá and Santarém (Soubies, ).…”

Section: Introductionmentioning

confidence: 99%

Vegetation response to climatic changes in western Amazonia over the last 7,600 years

Nascimento

Martins

Cordeiro

et al. 2019

Journal of Biogeography

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Aim Ongoing and future anthropogenic climate change poses one of the greatest threats to biodiversity, affecting species distributions and ecological interactions. In the Amazon, climatic changes are expected to induce warming, disrupt precipitation patterns and of particular concern, to increase the intensity and frequency of droughts. Yet the response of ecosystems to intense warm, dry events is not well understood. In the Andes the mid‐Holocene dry event (MHDE), c. 9,000 to 4,000 years ago, was the warmest and driest period of the last 100,000 years which coincided with changes in evaporation and precipitation that caused lake levels to drop over most of tropical South America. This event probably approximates our near‐climatic future, and a critical question is: How much did vegetation change in response to this forcing? Location Lake Pata, Brazilian Western Amazonia. Taxon Terrestrial and aquatic plants. Methods We used pollen, charcoal, total organic carbon (TOC), total nitrogen (TN), δ13C and δ15N data from a new high‐resolution core that spans the last c. 7,600 years history of Lake Pata. Results We found that in the wettest section of Amazonia changes associated with the MHDE were detected in the geochemistry analysis but that vegetation changed very little in response to drought during the Holocene. This is the first high‐resolution core without apparent hiatuses that spans most of the Holocene (last 7,600 cal yr bp) from Lake Pata, Brazil. Changes in the organic geochemistry of sediments indicated that between c. 6,500 and 3,600 cal yr bp lake levels dropped. Vegetation, however, showed little change as near‐modern forests were seen throughout the record, evidencing the substantial resilience of this system. Only a few species replacements and minor fluctuations in abundance were observed in the pollen record. Main conclusions The mid‐Holocene warming and reduced precipitation had a limited impact on western Amazonian forests. We attribute much of the resilience to a lack of fire in this system, and that if human‐set fires were to be introduced, the forest destruction from that cause would override that induced by climate alone.

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Palaeoenvironmental dynamics and underlying climatic changes in southeast Amazonia (Serra Sul dos Carajás, Brazil) during the late Pleistocene and Holocene

Cited by 51 publications

References 73 publications

Rivers shape population genetic structure in Mauritia flexuosa (Arecaceae)

Rivers shape population genetic structure in Mauritia flexuosa (Arecaceae)

Nature and causes of Quaternary climate variation of tropical South America

Vegetation response to climatic changes in western Amazonia over the last 7,600 years

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