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Titolo:
Feasibility of using near-infrared reflectance spectroscopy for the analysis of C, N, P, and diatoms in lake sediments
Autore:
Malley, DF; Ronicke, H; Findlay, DL; Zippel, B;
Indirizzi:
Fisheries & Oceans Canada, Inst Freshwater, Cent & Arctic Reg, Winnipeg, MB Fisheries & Oceans Canada Winnipeg MB Canada R3T 2N6 ic Reg, Winnipeg, MB UFZ Ctr Environm Res, Dept Inland Water Res, D-39114 Magdeburg, Germany UFZ Ctr Environm Res Magdeburg Germany D-39114 -39114 Magdeburg, Germany
Titolo Testata:
JOURNAL OF PALEOLIMNOLOGY
fascicolo: 3, volume: 21, anno: 1999,
pagine: 295 - 306
SICI:
0921-2728(199903)21:3<295:FOUNRS>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRECAMBRIAN SHIELD LAKES; NITROGEN; CHEMISTRY; CARBON; SOILS;
Keywords:
Lake Arendsee; Germany; freeze-core; eutrophication; calcite; near-infrared reflectance;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Malley, DF Fisheriesscent,ans Canada, Inst Freshwater, Cent & Arctic Reg, 501 Univ Cre Fisheries & Oceans Canada 501 Univ Crescent Winnipeg MB CanadaR3T 2N6
Citazione:
D.F. Malley et al., "Feasibility of using near-infrared reflectance spectroscopy for the analysis of C, N, P, and diatoms in lake sediments", J PALEOLIMN, 21(3), 1999, pp. 295-306

Abstract

The present study explored whether rapid, non-destructive near-infrared reflectance spectroscopy (NIRS) could complement conventional paleolimnological and chemical analyses of sediment cores for greater efficiency and cost-effectiveness. The study used a 47-cm long freeze-core from the deepest point in Lake Arendsee, Mecklenburg Plain in northern Germany taken in 1993 toelucidate eutrophication history and to identify the pre-impact algal communities in this system. The core had been analyzed for total C, CO32-, N, P, and diatoms. Thirty-four of the 47 1-cm thick core sections were scanned by NIRS and calibrations were developed for total C, CO32-, N, P, N:P, total diatoms, and three dominant diatom species with different sedimentary profiles (Stephanodiscus binatus, Cyclotella rossii, and Fragilaria crotonensis). Total C ranged from 167-194 mg g(-1) dry weight (d.w.), CO32- from 31.3-66.4 mg g(-1) d. w., N from 9.9-17.4 mg g(-1) d. w., and P from 0.7-6.0 mgg(-1) d. w. Calibrations developed using multiple linear regression between NIR-predicted values and chemically-measured values were excellent for P (r(2) > 0.99), good for C, N, and N:P (r(2) > 0.93), and satisfactory for CO32-(r(2) > 0.8). Calibrations for total diatoms and for individual specieswere highly statistically significant (r(2) between 0.54 and 0.69). Although the calibrations are not useful for reliable predictions of the content of diatoms in the samples, the results indicate that NIRS detects spectral properties associated with diatoms or lake conditions when they were present, and that further work is warranted to attempt to improve the results. The study demonstrated that rapid, non-destructive, simultaneous analysis of total C, CO(3)2(-,) N, P, and N:P in sediment cores is feasible.

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Documento generato il 28/11/20 alle ore 09:15:36