fungi and insect herbivores affect herb diversity depending on species traits of herbs and neighboring tree composition
Credit: Pixabay/CC0 Public Domain

The mechanisms of biodiversity maintenance have been a hot topic in ecology for decades. Fungi and insect herbivores contribute to the diversity of plants in grasslands, which has been frequently reported. However, evidence about their driving roles on forest herb diversity is not enough.

In a study published in Journal of Ecology, Wang Xugao and Dr. Jia Shihong from the Institute of Applied Ecology (IAE) of the Chinese Academy of Sciences (CAS) have conducted a field manipulation experiment in a temperate forest in northeastern China and examined the effects of fungi and insect herbivores on herb diversity by using fungicides and insecticides.

The researchers found that fungicides decreased herb diversity by 5%, and that the negative effect was weaker in the studied plots where there were a higher number of neighboring tree species. Though insecticides were able to reduce herb diversity as well, it was only in plots dominated by deciduous trees.

In addition, fungicides and insecticides affected herb diversity depending on the defensive traits of herb species (e.g., leaf thickness), and only the herbs with thinner leaves or non-clonal traits significantly decreased their species diversity when the plants were sprayed with fungicides and insecticides.

The study indicates that fungi and herbivorous insects play a non-negligible role in maintaining species diversity of understory herbs in the temperate forest. More information: Shihong Jia et al, The effects of natural enemies on herb diversity in a temperate forest depend on species traits and neighbouring tree composition, Journal of Ecology (2022). DOI: 10.1111/1365-2745.13973 Journal information: Journal of Ecology

Provided by Chinese Academy of Sciences Citation: Fungi and insect herbivores affect herb diversity depending on species traits of herbs and neighboring tree composition (2022, September 14) retrieved 14 September 2022 from https://phys.org/news/2022-09-fungi-insect-herbivores-affect-herb.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Keyword: Fungi and insect herbivores affect herb diversity depending on species traits of herbs and neighboring tree composition

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