The contributions of lightning to biomass turnover, gap formation and plant mortality in a tropical forest
The contributions of lightning to biomass turnover, gap formation and plant mortality in a tropical forest
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DOI：
10.1002/ecy.3541
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发表时间：
2021-10-20
期刊：
影响因子：
4.8
通讯作者：
Yanoviak, Stephen P.
中科院分区：
文献类型：
--
作者：
Gora, Evan M.;Bitzer, Phillip M.;Yanoviak, Stephen P.
闪电是一种常见的干扰源，但其在热带森林中的生态影响在很大程度上没有描述。在这里，我们量化的贡献雷击森林营业额和植物死亡率在低地巴拿马森林使用实时闪电监测系统。我们检查了分布在93个不同罢工中的2，195棵雷击受损的树木。没有人表现出疤痕或火灾。平均而言，每次罢工扰乱451米（2）（95% CI：365-545米（2）），创造了一个林冠间隙304米（2）（95% CI 198-454米（2）），并造成7.36毫克的木本生物量周转（CI：5.36-9.65毫克）。累积起来，我们估计，雷击在这片森林中创建林冠间隙等于0.39%的森林冠层面积，占20.1%的年度间隙面积形成，并负责16.1%的总木本生物量营业额。树木，藤本植物，草本攀缘植物和附生植物被闪电杀死的速度比他们的基线死亡率在未受损的控制网站的8-29倍。闪电引起的死亡的可能性较高的树木，藤本植物，草本攀缘植物比附生植物，高藤本植物死亡率表明，闪电是藤本植物营业额的重要驱动力。这些结果表明，闪电影响林隙动态，植物群落组成和碳储量在一些热带森林。
Lightning is a common source of disturbance, but its ecological effects in tropical forests are largely undescribed. Here we quantify the contributions of lightning strikes to forest turnover and plant mortality in a lowland Panamanian forest using a real-time lightning monitoring system. We examined 2,195 lightning-damaged trees distributed among 93 different strikes. None exhibited scars or fires. On average, each strike disturbed 451 m(2) (95% CI: 365-545 m(2)), created a canopy gap of 304 m(2) (95% CI 198-454 m(2)), and caused 7.36 Mg of woody biomass turnover (CI: 5.36-9.65 Mg). Cumulatively, we estimate that lightning strikes in this forest create canopy gaps equaling 0.39% of forest canopy area, representing 20.1% of annual gap area formation, and are responsible for 16.1% of total woody biomass turnover. Trees, lianas, herbaceous climbers and epiphytes were killed by lightning at rates 8-29 times greater than their baseline mortality rates in undamaged control sites. The likelihood of lightning-caused death was higher for trees, lianas, and herbaceous climbers than for epiphytes, and high liana mortality suggests that lightning is an important driver of liana turnover. These results indicate that lightning influences gap dynamics, plant community composition and carbon storage capacity in some tropical forests.