Diatoms at >5000 meters in the Quelccaya Summit Dome Glacier, Peru

Sherilyn C. Fritz; Bruce E. Brinson; W. E. Billups; Lonnie G. Thompson

doi:10.1657/AAAR0014-075

Diatoms at >5000 meters in the Quelccaya Summit Dome Glacier, Peru

Sherilyn C. Fritz, Bruce E. Brinson, W. E. Billups, Lonnie G. Thompson

Daugherty Water for Food Global Institute

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Diatoms were found in late Holocene age ice-core samples recovered from the Quelccaya Summit Dome in the tropical Andes of Peru and were imaged by environmental scanning electron microscopy and identified. Freshwater diatoms in the genera Hantzschia, Pinnularia, and Aulacoseira were the most common taxa in the samples and indicate a freshwater source for the material, which also is suggested by the presence of the freshwater alga Volvox. The overall species composition of the diatoms suggests that the majority of taxa originated from a high-elevation lake or wetland in the cordillera surrounding the ice cap. The abundant diatom valves, up to 70 μm in size, likely were transported to the ice via wind.

Original language	English (US)
Pages (from-to)	369-374
Number of pages	6
Journal	Arctic, Antarctic, and Alpine Research
Volume	47
Issue number	2
DOIs	https://doi.org/10.1657/AAAR0014-075
State	Published - May 1 2015

ASJC Scopus subject areas

Global and Planetary Change
Ecology, Evolution, Behavior and Systematics
Earth-Surface Processes

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title = "Diatoms at >5000 meters in the Quelccaya Summit Dome Glacier, Peru",

abstract = "Diatoms were found in late Holocene age ice-core samples recovered from the Quelccaya Summit Dome in the tropical Andes of Peru and were imaged by environmental scanning electron microscopy and identified. Freshwater diatoms in the genera Hantzschia, Pinnularia, and Aulacoseira were the most common taxa in the samples and indicate a freshwater source for the material, which also is suggested by the presence of the freshwater alga Volvox. The overall species composition of the diatoms suggests that the majority of taxa originated from a high-elevation lake or wetland in the cordillera surrounding the ice cap. The abundant diatom valves, up to 70 μm in size, likely were transported to the ice via wind.",

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T1 - Diatoms at >5000 meters in the Quelccaya Summit Dome Glacier, Peru

AU - Fritz, Sherilyn C.

AU - Brinson, Bruce E.

AU - Billups, W. E.

AU - Thompson, Lonnie G.

PY - 2015/5/1

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N2 - Diatoms were found in late Holocene age ice-core samples recovered from the Quelccaya Summit Dome in the tropical Andes of Peru and were imaged by environmental scanning electron microscopy and identified. Freshwater diatoms in the genera Hantzschia, Pinnularia, and Aulacoseira were the most common taxa in the samples and indicate a freshwater source for the material, which also is suggested by the presence of the freshwater alga Volvox. The overall species composition of the diatoms suggests that the majority of taxa originated from a high-elevation lake or wetland in the cordillera surrounding the ice cap. The abundant diatom valves, up to 70 μm in size, likely were transported to the ice via wind.

AB - Diatoms were found in late Holocene age ice-core samples recovered from the Quelccaya Summit Dome in the tropical Andes of Peru and were imaged by environmental scanning electron microscopy and identified. Freshwater diatoms in the genera Hantzschia, Pinnularia, and Aulacoseira were the most common taxa in the samples and indicate a freshwater source for the material, which also is suggested by the presence of the freshwater alga Volvox. The overall species composition of the diatoms suggests that the majority of taxa originated from a high-elevation lake or wetland in the cordillera surrounding the ice cap. The abundant diatom valves, up to 70 μm in size, likely were transported to the ice via wind.

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Diatoms at >5000 meters in the Quelccaya Summit Dome Glacier, Peru

Abstract

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