e-journal

Similar variation in carbon storage between deciduous and evergreen treeline species across elevational gradients

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† Background and Aims:
The most plausible explanation for treeline formation so far is provided by the growth limitation hypothesis (GLH), which proposes that carbon sinks are more restricted by low temperatures than by carbon sources. Evidence supporting the GLH has been strong in evergreen, but less and weaker in deciduous treeline
species. Here a test is made of the GLH in deciduous–evergreen mixed species forests across elevational gradients, with the hypothesis that deciduous treeline species show a different carbon storage trend from that shown by evergreen species across elevations.

† Methods:
Tree growth and concentrations of non-structural carbohydrates (NSCs) in foliage, branch sapwood and stem sapwood tissueswere measured at four elevations in six deciduous–evergreen treeline ecotones (including treeline) in the southernAndes of Chile (40 oS, Nothofagus pumilio and Nothofagus betuloides; 46 oS, Nothofagus pumilio and Pinus sylvestris) and in the Swiss Alps (468N, Larix decidua and Pinus cembra).

† Key Results:
Tree growth (basal area increment) decreased with elevation for all species. Regardless of foliar habit,
NSCs did not deplete across elevations, indicating no shortage of carbon storage in any of the investigated tissues. Rather, NSCs increased significantly with elevation in leaves (P

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Informasi Detail

Judul Seri

Annals of Botany

No. Panggil

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Penerbit

Oxford : Oxford University Press on behalf of the Annals of Botany Company., 2013

Deskripsi Fisik

Annals of Botany 112: 623–631, 2013

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

112: 2013

Subjek

EKOFISIOLOGI TANAMAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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