当前位置: X-MOL 学术Restor Ecol › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Eucalypt plantations for forest restoration in a fire-prone mosaic of grasslands and forests in northern Argentina
Restoration Ecology ( IF 3.2 ) Pub Date : 2021-05-28 , DOI: 10.1111/rec.13452
Rosario Montiel 1 , Silvia C. Zaninovich 1 , Natalia A. Bedrij 2 , Ariel Insaurralde 2 , Juan J. Verdoljak 3 , José L. Fontana 1 , Ma. Genoveva Gatti 2, 4
Affiliation  

In ecosystems with grassland-forest boundaries, tree plantations could be used to promote forest restoration. In the Humid Chaco region of central South America, fire is one of the main disturbances that shapes the landscape. As eucalypt plantations are flammable, the contribution they can make to forest restoration is questionable. We planted saplings of five native tree species in three different environments (forests, grasslands, and eucalypt plantations) and assessed microclimatic conditions likely to influence sapling survival and growth. After 1 year, accidental fires that affected much of the study area allowed us to investigate the susceptibility of different environments to fire occurrence and post-fire sapling survival. We planted 600 saplings in four plots per environment. We evaluated fire occurrence in the study area for 2 years and ask whether this factor affects sapling survival. In grasslands, microclimatic conditions were more extreme than in plantations. Plantations and forests showed high pre-fire sapling survival but growth was almost double in plantations, similar to grasslands for most species. In the study area, fire frequency was similar in plantations and grasslands, whereas forests plots never burnt during the 2-year study period. Fire reduced sapling survival in plantations, but not in grasslands where survival was low and similar in burned and unburned plots. For top-killed plants, post-fire resprouting ability was species-specific. While more firm conclusions await future studies with even larger sample sizes, our results indicate that fire management may be necessary in order to use eucalypt plantations as nurses in this fire-prone ecosystem.

中文翻译:

用于在阿根廷北部草原和森林易发生火灾的马赛克中恢复森林的桉树人工林

在具有草地-森林边界的生态系统中,可以利用人工林促进森林恢复。在南美洲中部潮湿的查科地区,火是塑造景观的主要干扰之一。由于桉树人工林易燃,它们对森林恢复的贡献值得怀疑。我们在三种不同的环境(森林、草原和桉树种植园)种植了五种本地树种的树苗,并评估了可能影响树苗存活和生长的小气候条件。1 年后,影响大部分研究区域的意外火灾使我们能够调查不同环境对火灾发生和火灾后树苗存活的敏感性。我们在每个环境的四个地块中种植了 600 棵树苗。我们评估了研究区 2 年的火灾发生情况,并询问该因素是否会影响树苗成活率。在草原,小气候条件比种植园更为极端。种植园和森林的火灾前树苗存活率很高,但种植园的生长几乎翻了一番,与大多数物种的草原相似。在研究区域,种植园和草地的火灾频率相似,而在 2 年的研究期间,森林地块从未燃烧过。火灾降低了种植园中树苗的存活率,但在存活率低且在燃烧和未燃烧的地块中相似的草原中则不然。对于头杀植物,火灾后的重新发芽能力是物种特异性的。虽然更确切的结论有待未来更大样本量的研究,
更新日期:2021-05-28
down
wechat
bug