Nature and causes of Quaternary climate variation of tropical South America

Baker, Paul A.; Fritz, Sherilyn C.

doi:10.1016/j.quascirev.2015.06.011

Cited by 186 publications

(194 citation statements)

References 140 publications

(208 reference statements)

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“…The history of glaciation and deglaciation along the length of the Andes can reveal linkages between modern climate systems as well as the global progression of regional climate changes during major climate transitions (e.g., Rodbell et al, 2009;Denton et al, 2010). Along the strike of the Andes, the large-scale patterns of major global (Hadley) circulation features change, and are modulated by regional systems (e.g., the El Niño/Southern Oscillation and the South American Summer Monsoon; Baker and Fritz, 2015) and by apparent teleconnections with longer-range climatic drivers such as Northern hemisphere Heinrich events (Kanner et al, 2012) or Antarctic polar front migration (Moreno et al, 2009). …”

Section: Introductionmentioning

confidence: 99%

Across the Arid Diagonal: deglaciation of the western Andean Cordillera in southwest Bolivia and northern Chile

Ward

Thornton

Cesta

2017

CIG

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Section: Introductionmentioning

confidence: 99%

Across the Arid Diagonal: deglaciation of the western Andean Cordillera in southwest Bolivia and northern Chile

Ward

Thornton

Cesta

2017

CIG

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“…However, it is common to find SAMS conflated with Intertropical Convergence Zone (ITCZ) in several studies about late Quaternary Paleoclimatology (Baker and Fritz 2015), since both present seasonal variability. Actually, SAMS is a product of land-sea thermal gradient.…”

Section: Paleoclimate-driven Environmental Changesmentioning

confidence: 99%

“…ITCZ variability may indirectly produce precipitation anomalies along the region where the SAMS is active (Baker and Fritz 2015), since the increase in moisture advection into the Amazon basin may increase the intensity of the SASM, and this is true on modern (e.g. Garcia and Kayano 2014) and ancient ages (millennial timescale) (Baker et al 2009, Vuille et al 2012).…”

Section: Paleoclimate-driven Environmental Changesmentioning

confidence: 99%

“…This suggests the presence of a dipole of precipitation associated to a walker cell that gives rise to an east-west bipolar see-saw pattern of monsoon precipitation (Cruz et al 2009). However, Baker and Fritz (2015) re-evaluated the speleothem records presented by Cheng et al (2013), and indicated different paleoclimate condition. Therefore, this new evidence needs to be tested using other paleoclimate proxies.…”

Section: Introductionmentioning

confidence: 98%

“…Incoming insolation has been considered as the main rule controlling the intensity of the South American monsoon system (SAMS) (Kutzbach et al 2008), with precession regulating insolation changes at tropical latitudes and eccentricity modulating its amplitude (Berger 1978, Baker andFritz 2015). Several paleoclimate records have been demonstrated the influence of precession on precipitation changes along the SAMS domain (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Holocene history of a lake filling and vegetation dynamics of the Serra Sul dos Carajás, southeast Amazonia

Guimarães

Sahoo

Souza‐Filho

et al. 2019

An. Acad. Bras. Ciênc.

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Down-core changes in sedimentary facies, elemental geochemistry, pollen, spore, δ 13 C, δ 15 N and radiocarbon records from a filled lake, named R4, of the Serra Sul dos Carajás were used to study the relationship between the paleomorphological and paleoecological processes and their significance for Holocene paleoclimatology of the southeast Amazonia. The sediment deposition of the R4 lake started around 9500 cal yr BP. Increase of detrital components from 9500 to 7000 cal yr BP suggests high weathering of surrounding catchment rocks and soils, and deposition into the lake basin under mudflows. At that time, montane savanna and forest formation were already established suggesting predominance of wet climate. However, from 7000 to 3000 cal yr BP, a decline of detrital input occurred. Also, forest formation and pteridophytes were declined, while palms and macrophytes were remained relatively stable, indicating that water levels of the lake is likely dropped allowing the development of plants adapted to subaerial condition under drier climate conditions. After 3000 cal yr BP, eutrophication and low accommodation space lead to high lake productivity and the final stage of the lake filling respectively, and forest formation may has acquired its current structure, which suggests return of wetter climate conditions.

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The Amazonian dwarf cichlid Apistogramma agassizii (Steindachner, 1875) is a geographic mosaic of potentially tens of species: Conservation implications

Duponchelle

Römer

García-Dávila

et al. 2020

Aquatic Conservation

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1. Assessing biodiversity and understanding how it works is a prerequisite for species conservation. The Amazon basin is one of the main biodiversity hotspots where fish are heavily exploited for ornamental purposes.2. The ornamental trade heavily exploits the genusApistogramma, which is one of the most species-rich among Neotropical cichlids with 94 formally described species. This number is certainly underestimated owing to the limitations of conventional taxonomy, which is still too often based solely on morphological criteria and sometimes on few individuals.3. Most species of this genus have a high degree of endemism and are highly prized on the ornamental market, which could put them at risk. A few species are supposed to have extensive distributions, and in particularApistogramma agassizii, present from the Amazon estuary up to the Ucayali and Maranon rivers in Peru.Please note that this is an author-produced PDF of an article accepted for publication following peer review. The definitive publisher-authenticated version is available on the publisher Web site.5. According to the molecular calibrations, these three species would have diverged during the Plio-Pleistocene. Two of them seem to be endemic from small sub-basins, one from the Nanay River and the other from the Apayacu/Ampiyacu systems. A possible scenario that may explain the evolutionary history of these species is proposed.6. The conservation implications of these results on the estimation of the diversity ofA. agassizii, ofApistogrammaspecies in general, and of other Amazonian cichlids are discussed.

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Nature and causes of Quaternary climate variation of tropical South America

Cited by 186 publications

References 140 publications

Across the Arid Diagonal: deglaciation of the western Andean Cordillera in southwest Bolivia and northern Chile

Across the Arid Diagonal: deglaciation of the western Andean Cordillera in southwest Bolivia and northern Chile

Holocene history of a lake filling and vegetation dynamics of the Serra Sul dos Carajás, southeast Amazonia

The Amazonian dwarf cichlid Apistogramma agassizii (Steindachner, 1875) is a geographic mosaic of potentially tens of species: Conservation implications

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