Holocene altitudinal shifts in vegetation belts and environmental changes in the Sierra Madre Occidental, Northwestern Mexico, based on modern and fossil pollen data

Ortega‐Rosas, Carmen Isela; Peñalba, M. Cristina; Guiot, Joël

doi:10.1016/j.revpalbo.2008.01.008

Cited by 38 publications

(40 citation statements)

References 68 publications

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“…Desert conditions are indicated by pollen of Amaranthaceae and Asteraceae, while episodes of wetter conditions inferable according to an increased extent of wetland and AP, albeit in low values. Asteraceae here may be related to intermittent composite growth on the dune fields (with gravity deposition of pollen), and it is further noted that pollen analog samples from desert bottoms in Northwest Mexico also contain high Asteraceae (Ortega-Rosas et al, 2008). The terminus of this zone is pre-recent due to removal of top-set sediment at the sand quarry exposure.…”

Section: Laguna Mayran Cuota 4 (Fig 6 Tables 4 and 6)mentioning

confidence: 80%

Prehistoric and Colonial land-use in the Chihuahuan Desert as inferred from pollen and sedimentary data from Coahuila, Mexico

Albert

2015

Quaternary International

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Section: Laguna Mayran Cuota 4 (Fig 6 Tables 4 and 6)mentioning

confidence: 80%

Prehistoric and Colonial land-use in the Chihuahuan Desert as inferred from pollen and sedimentary data from Coahuila, Mexico

Albert

2015

Quaternary International

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“…Such a situation has clearly been shown for the Holocene where the sites to undergo biomisation show little change relative to the modern (Ortega-Rosas et al, 2008a, b). Indeed, a site located in northwestern México records a transition from cool conifer forest to warm mixed forest about 6000 yr BP (Ortega-Rosas et al, 2008b). Similarly, a strong aridity signal is directly recorded by low lake levels in central México due to reduced northern excursion of the ITCZ, trade wind circulation, and ensuing reduced oceanic-land moisture transfer (Markgraf et al, 2000) that would have been reflected in ecosystem response.…”

Section: 000±1000 14 C Yr Bpmentioning

confidence: 99%

Pollen-based biome reconstructions for Latin America at 0, 6000 and 18 000 radiocarbon years ago

et al. 2009

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Abstract. The biomisation method is used to reconstruct Latin American vegetation at 6000±500 and 18 000±1000 radiocarbon years before present (14C yr BP) from pollen data. Tests using modern pollen data from 381 samples derived from 287 locations broadly reproduce potential natural vegetation. The strong temperature gradient associated with the Andes is recorded by a transition from high altitude cool grass/shrubland and cool mixed forest to mid-altitude cool temperate rain forest, to tropical dry, seasonal and rain forest at low altitudes. Reconstructed biomes from a number of sites do not match the potential vegetation due to local factors such as human impact, methodological artefacts and mechanisms of pollen representivity of the parent vegetation. At 6000±500 14C yr BP 255 samples are analysed from 127 sites. Differences between the modern and the 6000±500 14C yr BP reconstruction are comparatively small; change relative to the modern reconstruction are mainly to biomes characteristic of drier climate in the north of the region with a slight more mesic shift in the south. Cool temperate rain forest remains dominant in western South America. In northwestern South America a number of sites record transitions from tropical seasonal forest to tropical dry forest and tropical rain forest to tropical seasonal forest. Sites in Central America show a change in biome assignment, but to more mesic vegetation, indicative of greater plant available moisture, e.g. on the Yucatán peninsula sites record warm evergreen forest, replacing tropical dry forest and warm mixed forest presently recorded. At 18 000±1000 14C yr BP 61 samples from 34 sites record vegetation reflecting a generally cool and dry environment. Cool grass/shrubland is prevalent in southeast Brazil whereas Amazonian sites record tropical dry forest, warm temperate rain forest and tropical seasonal forest. Southernmost South America is dominated by cool grass/shrubland, a single site retains cool temperate rain forest indicating that forest was present at some locations at the LGM. Some sites in Central Mexico and lowland Colombia remain unchanged in the biome assignments of warm mixed forest and tropical dry forest respectively, although the affinities that these sites have to different biomes do change between 18 000±1000 14C yr BP and present. The "unresponsive" nature of these sites results from their location and the impact of local edaphic influence.

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“…Sin embargo, en la síntesis de datos paleoclimáticos presentados por el Panel Intergubernamental de Cambio Climático (IPCC, 2007) es notable la escasez de registros para las regiones tropicales. En el caso de México, aunque hay estudios para la zona central (Ortega-Guerrero et al, 2000;Israde-Alcántara et al, 2002;Caballero et al, 2006, Figueroa-Rangel et al, 2006Lozano-García et al, 2007;Roy et al, 2008;Vázquez-Castro et al, 2008;Kienel et al, 2009) en la península de Yucatán (Curtis et al, 1996;Hodell et al, 2001, Haug et al, 2003 y en algunos sitios del norte Lozano-García et al, 2002;Barron et al, 2003Barron et al, , 2004Pérez-Cruz, 2006;Ortega-Rosas et al, 2008) es evidente la falta de registros de alta resolución que permitan establecer con precisión la variabilidad climática de las últimas centurias.…”

Section: Introductionunclassified

Registro de sequías históricas en el occidente de México con base en el análisis elemental de sedimentos lacustres: El caso del lago de Santa María del Oro

Sosa-Nájera¹,

Lozano‐García²,

Roy³

et al. 2010

BSGM

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Holocene altitudinal shifts in vegetation belts and environmental changes in the Sierra Madre Occidental, Northwestern Mexico, based on modern and fossil pollen data

Cited by 38 publications

References 68 publications

Prehistoric and Colonial land-use in the Chihuahuan Desert as inferred from pollen and sedimentary data from Coahuila, Mexico

Prehistoric and Colonial land-use in the Chihuahuan Desert as inferred from pollen and sedimentary data from Coahuila, Mexico

Pollen-based biome reconstructions for Latin America at 0, 6000 and 18 000 radiocarbon years ago

Registro de sequías históricas en el occidente de México con base en el análisis elemental de sedimentos lacustres: El caso del lago de Santa María del Oro

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