Local canopy disturbance as an explanation for long-term increases in liana abundance,Ecology Letters

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Local canopy disturbance as an explanation for long-term increases in liana abundance
Ecology Letters ( IF 7.6 ) Pub Date : 2021-09-18 , DOI: 10.1111/ele.13881
Stefan A Schnitzer _{1,

2} , David M DeFilippis ₁ , Marco Visser ₃ , Sergio Estrada-Villegas _{1,

2,

4} , Rigoberto Rivera-Camaña ₁ , Boris Bernal ₁ , Salomé Peréz ₁ , Abelino Valdéz ₁ , Seberino Valdéz ₁ , Antonio Aguilar ₁ , James W Dalling _{2,

5} , Eben N Broadbent ₆ , Angelica M Almeyda Zambrano ₇ , Stephen P Hubbell _{2,

8} , Maria Garcia-Leon ₁

Affiliation

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.

中文翻译：

局部冠层干扰作为藤本植物丰度长期增加的解释

冠层扰动解释了热带森林中藤本植物的丰度和分布，因此也可以解释藤本植物丰度增加的普遍模式；然而，这一假设仍未得到检验。我们使用了一项为期 10 年（2007 年至 2017 年）的研究，对巴拿马古老森林中的 117,100 株根状藤本植物进行了研究，以测试当地冠层干扰是否解释了藤本植物丰度的增加。我们发现藤本植物密度增加了 29.2%，基底面积增加了 12.5%。这些增加中的绝大多数与冠层干扰后的克隆茎增殖有关，特别是在藤本植物密集的低冠层间隙中，与未受干扰的森林相比，藤本植物的增加量要大得多。藤本植物可能是生态位的建造者，在间隙中阻止树木再生，从而创造一个有利于藤本植物持续增殖的高光环境。

更新日期：2021-11-11

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