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Titolo:
UV-B effect on Quercus robur leaf litter decomposition persists over four years
Autore:
Newsham, KK; Anderson, JM; Sparks, TH; Splatt, P; Woods, C; McLeod, AR;
Indirizzi:
Ctr Ecol & Hydrol, Huntingdon PE17 2LS, Cambs, England Ctr Ecol & Hydrol Huntingdon Cambs England PE17 2LS 7 2LS, Cambs, England Univ Exeter, Dept Biol Sci, Hatherly Labs, Exeter EX4 4PS, Devon, England Univ Exeter Exeter Devon England EX4 4PS , Exeter EX4 4PS, Devon, England CEH Merlewood, Grange Sands LA11 6JU, Cumbria, England CEH Merlewood Grange Sands Cumbria England LA11 6JU 6JU, Cumbria, England
Titolo Testata:
GLOBAL CHANGE BIOLOGY
fascicolo: 4, volume: 7, anno: 2001,
pagine: 479 - 483
SICI:
1354-1013(200104)7:4<479:UEOQRL>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
RADIATION; QUALITY; LEAVES;
Keywords:
decomposition; Quercus robur leaf litter; stratospheric ozone depletion; UV-B radiation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Newsham, KK British Antarctic Survey, High Cross,Madingley Rd, Cambridge CB3 0ET, England British Antarctic Survey High Cross,Madingley Rd CambridgeEngland CB3 0ET
Citazione:
K.K. Newsham et al., "UV-B effect on Quercus robur leaf litter decomposition persists over four years", GL CHANGE B, 7(4), 2001, pp. 479-483

Abstract

The effects of elevated UV-B (280-315 nm) radiation on the long-term decomposition of Quercus robur leaf litter were assessed at an outdoor facility in the UK by exposing saplings to elevated UV-B radiation (corresponding toa 30% increase above the ambient level of erythemally weighted UV-B, equivalent to that resulting from a c. 18% reduction in ozone column) under arrays of cellulose diacetate-filtered fluorescent UVB lamps that also producedUV-A radiation (315-400 nm). Saplings were also exposed to elevated UV-A radiation alone under arrays of polyester-filtered fluorescent lamps and to ambient solar radiation under arrays of nonenergized lamps. After 8 months of irradiation, abscised leaves were placed into litter bags and allowed todecompose in the litter layer of a mixed deciduous woodland for 4.08 years. The dry weight loss of leaf litter from saplings irradiated with elevatedUV-B and UV-A radiation during growth was 17% greater than that of leaf litter irradiated with elevated UV-A radiation alone. Annual fractional weight loss of litter (k), and the estimated time taken for 95% of material to decay (3/k) were respectively increased and decreased by 27% for leaf litterexposed during growth to elevated UV-B and UV-A radiation, relative to that exposed to UV-A alone. The present data corroborate those from a previousstudy indicating that UV-B radiation applied during growth accelerates thesubsequent decomposition of Q. robur leaf litter in soil, but indicate that this effect persists for over four years after abscission.

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Documento generato il 01/04/20 alle ore 20:55:35