Secondary compounds increase litter removal by termites across 23 savanna grass species

IF 5.3 1区 环境科学与生态学 Q1 ECOLOGY Journal of Ecology Pub Date : 2024-07-29 DOI:10.1111/1365-2745.14376
Inger K. de Jonge, J. Hans C. Cornelissen, Han Olff, Matty P. Berg, Richard S. P. van Logtestijn, Michiel P. Veldhuis
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次生化合物增加了白蚁对 23 种热带草原草种的垃圾清除量
白蚁是热带生态系统中数量最多的动物群体之一,在养分循环中起着至关重要的作用,为维持生态系统的功能做出了巨大贡献。然而,它们对垃圾食物的选择性有多大、它们更喜欢营养丰富的还是营养较少的垃圾基质,这些都是尚未解决的重要问题。在这里,我们测试了垃圾特性对生长真菌的白蚁清除垃圾的影响,生长真菌的白蚁是塞伦盖蒂-马拉生态系统中的主要大型食草动物。我们使用金属网垃圾袋测量了 23 种草在 61 天孵化期后的茎叶垃圾损失量。表明白蚁存在的片状沉积物随单宁酸和酚类化合物的增加而增加,尤其是叶屑(R2 = 0.54),其中高芳香物种(如Cymbopogon caesius和Bothriochloa insculpta)的片状沉积率最高。与没有覆膜的垃圾袋相比,有覆膜的垃圾袋平均质量损失高出 66%。一旦白蚁选择了基质,无论卵袋的特征如何,质量损失都会持续增加。在量化铺垫频率和不同质量损失的综合影响时,我们发现真菌生长的白蚁主要增加了高营养垃圾的质量损失。这主要是由于白蚁增加了叶屑而不是茎屑的质量损失,而单宁酸浓度是白蚁增加整体分解的主要预测因素。这表明白蚁改善了植物次生化合物对垃圾分解的不利影响。综述:我们的研究结果支持了真菌白蚁是通才的观点,因为白蚁收集的有机基质质量各不相同。酚类化合物对成片率的强烈影响意味着次生化合物在白蚁的基质选择中起着重要作用。白蚁对次生化合物含量高的基质的选择性清除表明,生长真菌的白蚁解除了对微生物分解的重要限制,从而有可能提高生态系统层面的碳和养分循环利用率。白蚁在热带生物群落的有机物循环中发挥着至关重要的作用,我们的研究强调了次生化合物在分解研究中的选择和检测作用需要更多的关注。
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来源期刊
Journal of Ecology
Journal of Ecology 环境科学-生态学
CiteScore
10.90
自引率
5.50%
发文量
207
审稿时长
3.0 months
期刊介绍: Journal of Ecology publishes original research papers on all aspects of the ecology of plants (including algae), in both aquatic and terrestrial ecosystems. We do not publish papers concerned solely with cultivated plants and agricultural ecosystems. Studies of plant communities, populations or individual species are accepted, as well as studies of the interactions between plants and animals, fungi or bacteria, providing they focus on the ecology of the plants. We aim to bring important work using any ecological approach (including molecular techniques) to a wide international audience and therefore only publish papers with strong and ecological messages that advance our understanding of ecological principles.
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