Forest diversity effects on insect herbivores: do leaf traits matter?
Forest diversity effects on insect herbivores: do leaf traits matter?
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DOI：
10.1111/nph.15558
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发表时间：
2019-03
期刊：
影响因子：
--
通讯作者：
Koricheva J
中科院分区：
文献类型：
--
作者：
Muiruri EW;Barantal S;Iason GR;Salminen JP;Perez-Fernandez E;Koricheva J
在不同的植物林中，昆虫食草动物的危害和丰富度往往会减少。然而，很少有研究探讨这种现象是否是植物多样性对寄主植物特性影响的结果。我们在芬兰的一项长期森林多样性实验中，通过树叶特征的变化，探索了树种多样性对食草动物的间接影响。对生长在1种、2种、3种和5种混交林中的白桦树的16个叶片性状和4种昆虫(咀嚼、成瘤、潜叶和卷叶)的危害进行了测定。混交林中白桦林频率的下降导致叶面积的减少。反过来，这又促进了混合林中咀嚼损伤的减少。相反，桦树对潜叶虫的联合抗性不是由性状介导的，而是由随着树种丰富度的增加而同时下降的桦树频率直接驱动的。我们的结果表明，叶片性状在多样性梯度上的变异可能会促进联合抗性，但这些模式是由异种物种相对丰富度的增加驱动的，而不是由乔木物种丰富度本身驱动的。因此，考虑林分结构和关键叶片性状的同步变化对于解释植物多样性效应和预测联合格局是很重要的。
Insect herbivore damage and abundance are often reduced in diverse plant stands. However, few studies have explored whether this phenomenon is a result of plant diversity effects on host plant traits. We explored indirect effects of tree species diversity on herbivory via changes in leaf traits in a long‐term forest diversity experiment in Finland. We measured 16 leaf traits and leaf damage by four insect guilds (chewers, gall formers, leaf miners and rollers) on silver birch (Betula pendula) trees growing in one‐, two‐, three‐ and five‐species mixtures. A decline in the frequency of birch in mixed stands resulted in reduced leaf area. This, in turn, mediated the reduction in chewing damage in mixed stands. In contrast, associational resistance of birch to leaf miners was not trait‐mediated but driven directly by concurrent declines in birch frequency as tree species richness increased. Our results show that leaf trait variation across the diversity gradient might promote associational resistance, but these patterns are driven by an increase in the relative abundance of heterospecifics rather than by tree species richness per se. Therefore, accounting for concurrent changes in stand structure and key foliar traits is important for the interpretation of plant diversity effects and predictions of associational patterns.
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DOI：
10.4236/oje.2012.24024
发表时间：
2012-11-01
期刊：
Open Journal of Ecology
影响因子：
--
作者：
Andrew, Nigel R.;Roberts, Isobel R.;Hill, Sarah J.
通讯作者：
Hill, Sarah J.
影响因子：
4.8
作者：
AYRES, MP;MACLEAN, SF
通讯作者：
MACLEAN, SF
影响因子：
1.6
作者：
Bjorkman, Maria;Hamback, Peter A.;Ramert, Birgitta
通讯作者：
Ramert, Birgitta
影响因子：
3.7
作者：
Abbas M;Ebeling A;Oelmann Y;Ptacnik R;Roscher C;Weigelt A;Weisser WW;Wilcke W;Hillebrand H
通讯作者：
Hillebrand H
影响因子：
5.5
作者：
Cardenas, Rafael E.;Valencia, Renato;Dangles, Olivier
通讯作者：
Dangles, Olivier