The chemical ecology of tropical forest diversity: Environmental variation, chemical similarity, herbivory, and richness
The chemical ecology of tropical forest diversity: Environmental variation, chemical similarity, herbivory, and richness
复制标题
DOI：
10.1002/ecy.3762
复制
发表时间：
2022-07-12
期刊：
影响因子：
4.8
通讯作者：
Dyer, Lee A.
中科院分区：
文献类型：
--
作者：
Massad, Tara Joy;Richards, Lora A.;Dyer, Lee A.
热带森林的物种丰富度与多样性的其他方面相关，包括植物-食草动物相互作用的多样性和影响这些相互作用的植物化学多样性。通过将代谢组学应用于自然系统，已经显著增强了对植物化学的复杂性以及植物化学多样性对植物-昆虫相互作用和整体森林丰富度的重要性的理解。本工作使用质子核磁共振光谱（H-1-NMR）分析的粗叶提取物，研究植物化学的相似性和多样性自然生长在巴西大西洋雨林的胡椒植物。光谱轮廓相似性和化学多样性进行了量化，研究指标的植物化学多样性，专家和通才植食性，林下植物丰富度之间的关系。食草动物增加林下物种丰富度，而通才食草动物增加和专业食草动物减少胡椒叶材料的多样性。专业植食性增加时，同种寄主植物光谱不同。普通种的光谱相似性较低，但光谱多样性也较高，表明植物化学成分的多样性对植物是有益的。冠层开放度和土壤养分也影响化学和草食动物。这项研究中发现的复杂关系增加了我们对植物化学多样性对植物-昆虫相互作用和热带植物物种丰富度的重要性的认识。
Species richness in tropical forests is correlated with other dimensions of diversity, including the diversity of plant-herbivore interactions and the phytochemical diversity that influences those interactions. Understanding the complexity of plant chemistry and the importance of phytochemical diversity for plant-insect interactions and overall forest richness has been enhanced significantly by the application of metabolomics to natural systems. The present work used proton nuclear magnetic resonance spectroscopy (H-1-NMR) profiling of crude leaf extracts to study phytochemical similarity and diversity among Piper plants growing naturally in the Atlantic Rainforest of Brazil. Spectral profile similarity and chemical diversity were quantified to examine the relationship between metrics of phytochemical diversity, specialist and generalist herbivory, and understory plant richness. Herbivory increased with understory species richness, while generalist herbivory increased and specialist herbivory decreased with the diversity of Piper leaf material available. Specialist herbivory increased when conspecific host plants were more spectroscopically dissimilar. Spectral similarity was lower among individuals of common species, and they were also more spectrally diverse, indicating phytochemical diversity is beneficial to plants. Canopy openness and soil nutrients also influenced chemistry and herbivory. The complex relationships uncovered in this study add information to our growing understanding of the importance of phytochemical diversity for plant-insect interactions and tropical plant species richness.