Preliminary report on the Late Pleistocene and Holocene diatoms of Swamp Lake, Yosemite National Park, California, USA

Phytotaxa
By:  and 

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Abstract

Swamp Lake, Yosemite National Park, is the only known lake in California containing long sequences of varved sediments and thus has the potential to provide a high-resolution record of climate variability. This preliminary analysis of the diatom assemblages from a 947-cm-long composite sediment core (freeze core FZ02–05; 0–67 cm, Livingstone core 02–05; 53–947 cm) shows that the lake has been freshwater, oligotrophic, and circumneutral to alkaline throughout its ~16,000-year-long history. The first sediments deposited in the lake show that the vegetation in the watershed was sparse, allowing organic matter-poor silt and clay to be deposited in the basin. The basin filled quickly to a depth of at least 5 m and remained at least that deep for most of the sediment record. Several short intervals provided evidence of large fluctuations in lake level during the Holocene. The upper 50 cm of the core contains evidence of the Medieval Climate Anomaly and Little Ice Age.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Preliminary report on the Late Pleistocene and Holocene diatoms of Swamp Lake, Yosemite National Park, California, USA
Series title Phytotaxa
DOI 10.11646/phytotaxa.127.1.14
Volume 127
Issue 1
Year Published 2013
Language English
Publisher Magnolia Press
Contributing office(s) Volcano Science Center
Description 22 p.
First page 128
Last page 149
Country United States
State California
Other Geospatial Swamp Lake, Yosemite National Park