Long-term dynamics of watershed leaching and lake sediment sequestration of rare earth elements following deglaciation of two mountain watersheds.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F16%3A00459979" target="_blank" >RIV/60077344:_____/16:00459979 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/s10933-015-9872-0" target="_blank" >http://dx.doi.org/10.1007/s10933-015-9872-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10933-015-9872-0" target="_blank" >10.1007/s10933-015-9872-0</a>

Result language

angličtina

Original language name

Long-term dynamics of watershed leaching and lake sediment sequestration of rare earth elements following deglaciation of two mountain watersheds.

Original language description

Sediment cores from Sargent Mountain Pond (SMP), Maine, USA and Plešné Lake (PL), Czech Republic, record the entire post-glacial terrestrial vegetation and chemical dynamics of the watershed and lake from 16,600 and 14,600 Cal Yr BP, respectively, to the present. Total rare earth element (REE) concentrations and fluxes to the sediment declined from deglaciation until forest developed prior to the Younger Dryas (YD) (12,600–11,600 Cal Yr BP) at SMP, and immediately after the YD at PL, peaked in value just after the YD, and then declined to the present. Before the YD, REE concentrations were dominated by detrital, soluble apatite. Weathering of apatite contributed the phosphorus (P) sequestered in the lake sediment. After the YD, REE concentrations and fluxes behave coherently with NaOH-extractable aluminum (Al) and P after forestation in each catchment. Concentrations of extractable REEs, P, and Al peak after the YD and decline coherently to the present. After afforestation and development of organic-rich forest soils, concentrations of dissolved organic carbon (DOC) in soil water and runoff increased. Concurrently, the weathering of apatite released phosphate and Ca to runoff, raising pH about 8. The soil DOC complexed with and mobilized Al and REEs, which were transported to the lakes in runoff. There, photooxidation of the Al–DOC and REE–DOC complexes caused release of ionic, inorganic Al and REEs, precipitation of Al hydroxide in the higher-pH environment, adsorption of REEs and phosphate by the Al hydroxide, and irreversible sedimentation. REE concentrations and fluxes declined from the YD to the present because the apatite was progressively depleted in the soil by weathering, while REEs were increasingly retained by secondary Al and Fe hydroxides in the soil.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DJ - Pollution and water control

OECD FORD branch

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Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Paleolimnology

ISSN

0921-2728

e-ISSN

—

Volume of the periodical

55

Issue of the periodical within the volume

3

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

14

Pages from-to

209-222

UT code for WoS article

000373304100002

EID of the result in the Scopus database

2-s2.0-84959142976