气候变化领域集成服务门户(CCPortal): Mid to late Holocene hydrological and sea-level change reconstructions from La Mancha coastal lagoon; Veracruz; Mexico

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DOI	10.1016/j.palaeo.2019.01.033
	Mid to late Holocene hydrological and sea-level change reconstructions from La Mancha coastal lagoon; Veracruz; Mexico
	Arellano-Torres E.; Correa-Metrio A.; López-Dávila D.; Escobar J.; Curtis J.H.; Cordero-Oviedo M.C.
发表日期	2019
ISSN	0031-0182
起始页码	150
结束页码	162
卷号	520
英文摘要	We studied a 13-meter sediment core collected from La Mancha coastal lagoon, Veracruz, Mexico, to determine paleoenvironmental variations linked to the mid- to late Holocene sea-level rise. We examined modern and fossil benthic foraminiferal assemblages, isotopic values in tests of Ammonia tepida (δ 18 O-foram and δ 13 C-foram), δ 13 C in organic matter (δ 13 C-org), and sediment elemental ratios (Fe/Ca, Ca/Ti, and K/Rb) to reconstruct salinity variations, coastal processes, and the morphologic evolution of a partially closed coastal lagoon. We identified four main periods of environmental change: (1) From ~7800 to 6500 cal. yr. BP, the core site was an open lagoon with higher oceanic influence than today, through the presence of a southern mouth, as evidenced by the euryhaline assemblage Ammonia-Quinqueloculina-Bolivina-Nonionella. Low δ 18 O-foram and high δ 13 C values on foraminifera shells indicate greater inputs of seawater, and δ 13 C-org values reflect a lagoon environment. Elemental ratios of lower Fe/Ca, moderate Ca/Ti, and higher K/Rb suggest increased coastal weathering and reduced detrital deposits than today. (2) From ~6500 to 4600 cal. yr. BP., the lagoon experienced the progressive closure of the southern mouth, to the point that sedimentation restricted seawater entrance, as evidenced by variable δ 13 C-org values, a lowering trend in δ 18 O-foram and δ 13 C-foram values, low Fe/Ca, higher Ca/Ti but moderate K/Rb values. At this time, benthic foraminifera were dominated by the opportunistic Ammonia-Elphidium polyhaline assemblage. (3) From ~4600 to 1400 cal. yr. BP, the northern mouth was the only source of seawater to the lagoon, establishing the optimal environment for calcareous foraminifera of the polyhaline assemblage Ammonia-Elphidium. Lowest δ 13 C-org values indicate greater organic input by terrestrial plants. (4) At 1400 cal. yr. BP, modern conditions of a partially closed lagoon were established, while increased terrigenous inputs and freshwater runoff favored the growth of agglutinated foraminifera species. At millennial time scales, in addition to the sea level rise effects, the lagoon evolution fits in the paleoclimatic context that links insolation, the latitudinal change of ITCZ, ocean currents, longshore drift and moisture transport, as driving factors of morphological change in the western coast of the Gulf of Mexico. © 2019 Elsevier B.V.
英文关键词	Benthic foraminifera; Elemental ratios; Lagoon evolution; Paleoclimatology; Stable isotopes
语种	英语
scopus关键词	benthic foraminifera; coastal lagoon; fossil assemblage; growth; Holocene; hydrological change; latitudinal gradient; oceanic current; paleoclimate; paleoenvironment; reconstruction; runoff; sea level change; seawater; sediment core; sedimentation; stable isotope; Atlantic Ocean; Castilla-La Mancha; Gulf of Mexico; La Mancha [Castilla-La Mancha]; Mexico [North America]; Spain; Veracruz; Ammonia (foraminiferan); Ammonia tepida; Bolivina; Elphidium; Foraminifera; Nonionella; Quinqueloculina
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151022
作者单位	Facultad de Ciencias, Departamento de Ecología y Recursos Naturales, Universidad Nacional Autónoma de México, Av. Universidad 3000, Circuito Exterior s/n, Coyoacán, Ciudad Universitaria, Mexico City, 04510, Mexico; Instituto de Geología, Departamento de Dinámica Terrestre Superficial, Universidad Nacional Autónoma de México, Av. Universidad 3000, Circuito de la Investigación Científica s/n, Coyoacán, Ciudad Universitaria, Mexico City, 04510, Mexico; Facultad de Ciencias, Licenciatura en Ciencias de la Tierra, Departamento de Física, Universidad Nacional Autónoma de México, Av. Universidad 3000, Circuito Exterior s/n, Coyoacán, Ciudad Universitaria, Mexico City, 04510, Mexico; Departamento de Ingeniería Civil y Ambiental, Universidad del Norte, Km 5 Vía Puerto Colombia, Barranquilla, Colombia; Center for Tropical Paleoecology and Archaeology, Smithsonian Tropical Research Institute, Box 0843-03092Balboa, Panama; Department of Geological Sciences, University of Florida, Gainsville, FL 32611, United States;...
推荐引用方式 GB/T 7714	Arellano-Torres E.,Correa-Metrio A.,López-Dávila D.,et al. Mid to late Holocene hydrological and sea-level change reconstructions from La Mancha coastal lagoon; Veracruz; Mexico[J],2019,520.
APA	Arellano-Torres E.,Correa-Metrio A.,López-Dávila D.,Escobar J.,Curtis J.H.,&Cordero-Oviedo M.C..(2019).Mid to late Holocene hydrological and sea-level change reconstructions from La Mancha coastal lagoon; Veracruz; Mexico.Palaeogeography, Palaeoclimatology, Palaeoecology,520.
MLA	Arellano-Torres E.,et al."Mid to late Holocene hydrological and sea-level change reconstructions from La Mancha coastal lagoon; Veracruz; Mexico".Palaeogeography, Palaeoclimatology, Palaeoecology 520(2019).