e-journal

Context-dependent changes in the functional composition of tree communities along successional gradients after land-use change

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1. Land-use change can modify the functional composition of tree communities, which is an essential
determinant of the ecosystem functions. The lack of consensus about the functional responses of
tree communities to land-use change is a major uncertainty in the assessments of human impacts on
terrestrial ecosystem functions.

2. In this study, we applied a machine-learning method to a large data set consisting of 2574 tree
communities across Japan to examine changes in the functional composition of tree communities
after land-use change while considering contexts including successional trajectories, forest types and
the presence of gymnosperms. Specifically, we hypothesized that functional changes along successional
gradients after land-use change can be different in different contexts.

3. Effects of two successional variables (stand age and basal area) on functional composition were
highly significant throughout the study region. Changes in functional composition with changes in
the two successional variables differed greatly, and the effects of basal area often outweighed those
of stand age.

4. Tree communities with small basal area were generally characterized by functional traits related
to the resource-acquisitive strategy, that is short adult stature, low leaf mass per unit area, small
seeds, low wood density and large leaves, especially when gymnosperms were excluded from the
analysis. Decreasing basal area but not decreasing stand age often led to a considerable loss in functional
diversity. Despite these general trends, functional changes along successional gradients after
land-use change were not necessarily parallel and the opposite patterns were sometimes observed
among forest types, traits and taxonomic groups.

5. Synthesis. As a whole, our analyses demonstrate that the functional changes in tree communities
after land-use change are highly evident in a given context but can be different under different contexts.
These changes in functional composition can trigger variable changes in ecosystem functions
such as carbon and nutrient cycling that depend on the context.

Key-words: biodiversity, community assembly, determinants of plant community diversity and
structure, ecosystem functions, forest succession, functional composition, functional diversity, landuse
change, secondary forest

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Ketersediaan

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Informasi Detail

Judul Seri

Journal of Ecology

No. Panggil

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Penerbit

London : British Ecological Society., 2016

Deskripsi Fisik

Journal of Ecology 2016, 104, 1347–1356

Bahasa

English

ISBN/ISSN

doi: 10.1111/1365-27

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

2016, 104

Subjek

EKOLOGI

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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