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The invasion of abandoned fields by a major alien tree filters understory plant traits in novel forest ecosystems.


ABSTRACT: The abandonment of agricultural use is a common driver of spontaneous reforestation by alien trees. The N-fixing black locust (Robinia pseudoacacia L.) is a major alien invader of old fields in Europe. Here we show that canopy dominance by this tree may filter the frequency distribution of plant functional traits in the understory of secondary woodlands. Higher soil C/N ratio and available P are associated with black locust stands, while higher soil phenols associate with native tree stands. These environmental effects result in differences in understory flowering periods, reproduction types and life forms. Our findings emphasize the effect of a major alien tree on functional plant trait composition in the early stages of spontaneous reforestation of abandoned lands, implying the development of a novel forest ecosystem on a large geographical scale.

SUBMITTER: Sitzia T 

PROVIDER: S-EPMC5976623 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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The invasion of abandoned fields by a major alien tree filters understory plant traits in novel forest ecosystems.

Sitzia T T   Campagnaro T T   Kotze D J DJ   Nardi S S   Ertani A A  

Scientific reports 20180530 1


The abandonment of agricultural use is a common driver of spontaneous reforestation by alien trees. The N-fixing black locust (Robinia pseudoacacia L.) is a major alien invader of old fields in Europe. Here we show that canopy dominance by this tree may filter the frequency distribution of plant functional traits in the understory of secondary woodlands. Higher soil C/N ratio and available P are associated with black locust stands, while higher soil phenols associate with native tree stands. The  ...[more]

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