Skip to main content

Research Repository

Advanced Search

Lianas have a seasonal growth advantage over co‐occurring trees

Schnitzer, Stefan A.; van der Heijden, Geertje M.F.

Authors

Stefan A. Schnitzer

Geertje M.F. van der Heijden



Abstract

The seasonal growth advantage hypothesis posits that plant species that grow well during seasonal drought will increase in abundance in forests with increasing seasonality of rainfall both in absolute numbers and also relative to co-occurring plant species that grow poorly during seasonal drought. That is, seasonal drought will give some plant species a growth advantage that they lack in a seasonal forests, thus allowing them attain higher abundance. For tropical forest plants, the seasonal growth advantage hypothesis may explain the distribution of drought-adapted species across large-scale gradients of rainfall and seasonality. We tested the seasonal growth advantage hypothesis with lianas and trees in a seasonal tropical forest in central Panama. We measured the dry-season and wet-season diameter growth of 1117 canopy trees and 648 canopy lianas from 2011-2016. We also evaluated how lianas and trees responded to the 2015-2016 el Niño, which was the third strongest el Niño drought on record in Panama. We found that liana growth rate was considerably higher during the dry-season months than the wet-season months in each of the five years. Lianas achieved a full half of their annual growth during the 4-month dry season. By contrast, trees grew far more during the wet season; they realized only a quarter of their annual growth during the dry season. During the strong 2015-2016 el Niño dry season, trees essentially stopped growing, whereas lianas grew unimpeded and as well as during any of the previous four dry seasons. Our findings support the hypothesis that seasonal growth gives lianas a decided growth advantage over trees in seasonal forests compared to a seasonal forests, and may explain why lianas peak in both absolute and relative abundance in highly seasonal tropical forests. Furthermore, the ability of lianas to grow during a strong el Niño drought suggests that lianas will benefit from the predicted increasing drought severity, whereas trees will suffer, and thus lianas are predicted to increase in relative abundance in seasonal tropical forests.

Journal Article Type Article
Publication Date May 1, 2019
Journal Ecology
Print ISSN 0012-9658
Electronic ISSN 1939-9170
Publisher Ecological Society of America
Peer Reviewed Peer Reviewed
Volume 100
Issue 5
Article Number e02655
Pages 1-12
APA6 Citation Schnitzer, S. A., & van der Heijden, G. M. (2019). Lianas have a seasonal growth advantage over co‐occurring trees. Ecology, 100(5), 1-12. doi:10.1002/ecy.2655
DOI https://doi.org/10.1002/ecy.2655
Keywords El Ni~no; lianas; Panama; plant distribution; seasonal growth advantage; tropical forests
Publisher URL https://esajournals.onlinelibrary.wiley.com/doi/full/10.1002/ecy.2655

Files



You might also like



Downloadable Citations

;