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How do invasive trees impact shrub layer diversity and productivity in temperate forests?
Annals of Forest Science ( IF 3 ) Pub Date : 2021-02-24 , DOI: 10.1007/s13595-021-01033-8
Marcin K. Dyderski , Andrzej M. Jagodziński

Key message

Invasive tree species alter taxonomic diversity and functioning of forest shrub layers: Prunus serotina increases shrub layer biomass two to three times but decreases its biodiversity, Robinia pseudoacacia slightly increases shrub layer biomass and has no effect on its biodiversity, while Quercus rubra both biomass and biodiversity of the shrub layer.

Context

Although the impact of invasive trees on understory biodiversity is known, very little data exist about their influence on shrub layer biodiversity and productivity.

Aims

To assess impacts of Prunus serotina Ehrh., Quercus rubra L., and Robinia pseudoacacia L. on shrub layer aboveground biomass, species composition, and alpha diversity.

Methods

We measured stand structures in a set of 168 study plots established in Wielkopolski National Park (W Poland), and we compared biomass and diversity metrics using generalized mixed-effects linear models.

Results

We found the lowest aboveground biomass of shrub layers in Q. rubra forests. P. sylvestris forests invaded by P. serotina had two to three times higher aboveground biomass than non-invaded forests. R. pseudoacacia forests had 27.8% higher shrub layer biomass than Quercus-Acer-Tilia forests. We found negative impacts of Q. rubra and negligible impacts of R. pseudoacacia on shrub layer alpha diversity metrics. However, the effect of Q. rubra was similar to native F. sylvatica. P. serotina negatively affected functional diversity, but its effects were lower in rich P. sylvestris forests than in poor P. sylvestris forests.

Conclusion

The introduction of alien tree species alters ecosystem services and species diversity of shrub layers. The direction and magnitude of these alterations are alien species-specific and context-dependent. Therefore, their management should account for their impacts.



中文翻译:

侵入性树木如何影响温带森林中灌木层的多样性和生产力?

关键信息

外来入侵树种改变了森林灌木层的分类学多样性和功能: 李子血清 将灌木层生物量增加了两倍至三倍,但降低了其生物多样性, 刺槐 略微增加了灌木层生物量且对其生物多样性没有影响,而红 同时对生物量和生物多样性都有影响。灌木层。

上下文

尽管入侵树对林下生物多样性的影响是已知的,但很少有关于灌木对灌木层生物多样性和生产力的影响的数据。

目的

评估李子血清,刺槐对地上灌木层生物量,物种组成和α多样性的影响。

方法

我们在Wielkopolski国家公园(波兰W)建立的168个研究用地中测量了林分结构,并使用广义混合效应线性模型比较了生物量和多样性指标。

结果

我们发现Q. rubra森林中灌木层的地上生物量最低。受到P. serotina入侵的樟子松林地上生物量是未入侵森林的两到三倍。拟金合欢林的灌木层生物量比栎木-宏cer-T树林高27.8%。我们发现了Q. rubra的负面影响和R. pseudoacacia对灌木层α多样性指标的影响可忽略不计。然而,Q。rubra的作用类似于天然的F. sylvatica血清锈菌对功能多样性有负面影响,但在富营养条件下其影响较低樟子松森林比贫穷的樟子松森林要多。

结论

外来树种的引入改变了灌木层的生态系统服务和物种多样性。这些改变的方向和程度取决于特定的外来物种和背景。因此,他们的管理层应考虑其影响。

更新日期:2021-02-24
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