Local canopy disturbance as an explanation for long‐term increases in liana abundance. (18th September 2021)

• Record Type: Journal Article
• Authors: Schnitzer, Stefan A.; DeFilippis, David M.; Visser, Marco; Estrada‐Villegas, Sergio; Rivera‐Camaña, Rigoberto; Bernal, Boris; Peréz, Salomé; Valdéz, Abelino; Valdéz, Seberino; Aguilar, Antonio; Dalling, James W.; Broadbent, Eben N.; Almeyda Zambrano, Angelica M.; Hubbell, Stephen P.; Garcia‐Leon, Maria
• Editors: Rejmanek, Marcel
• Is Part Of: Ecology letters. Volume 24:Number 12(2021)
• Page Start: 2635
• Page End: 2647
• Publication Date: 2021-09-18
• Subjects: Barro Colorado Island -- disturbance ecology -- global change -- liana increases -- Panama -- tropical forests; Ecology -- Periodicals; 577
• DOI: 10.1111/ele.13881
• Languages: English
• ISSNs: 1461-023X

Abstract

Abstract: Canopy disturbance explains liana abundance and distribution within tropical forests and thus may also explain the widespread pattern of increasing liana abundance; however, this hypothesis remains untested. We used a 10‐year study (2007–2017) of 117, 100 rooted lianas in an old‐growth Panamanian forest to test whether local canopy disturbance explains increasing liana abundance. We found that liana density increased 29.2% and basal area 12.5%. The vast majority of these increases were associated with clonal stem proliferation following canopy disturbance, particularly in liana‐dense, low‐canopy gaps, which had far greater liana increases than did undisturbed forest. Lianas may be ecological niche constructors, arresting tree regeneration in gaps and thus creating a high‐light environment that favours sustained liana proliferation. Our findings demonstrate that liana abundance is increasing rapidly and their ability to proliferate via copious clonal stem production in canopy gaps explains much of their increase in this and possibly other tropical forests. Abstract : Stem map of the liana community of the BCI 50‐ha plot. Over a 10‐year period (2007–2017), liana density increased 29.3% and liana basal area increased 12.5%. These changes represent major changes to one of the most intensively studied tropical forests in the world.