Hui Shao , Huimin Wang , Manuel Delgado-Baquerizo , Xiaoqin Dai , Shengwang Meng , Paul Kardol , Yuxin Wang , Fusheng Chen , Liang Kou , Decai Gao , Xiaoli Fu
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引用次数: 0
Abstract
Tropical and subtropical forests are important for terrestrial gross primary production. These forests are limited by nutrient availability and are vulnerable to nutrient enrichment under global change. However, little is known about how and why belowground biodiversity responds to nutrient enrichment during litter decomposition in these forests – the fundamental process fuelling nutrients to the soil system while supporting carbon sequestration. We conducted a 6-year field microcosm experiment and used a linear mixed effect to investigate the effects of nutrient enrichment on micro-food webs (i.e., microbes and nematodes) of leaf and root litters in a subtropical plantation. We found strong effects of nutrient enrichment on diversity and structure of microbes and nematodes during litter decomposition. For instance, fertilization (nitrogen+phosphorus; N + P) significantly decreased fungal richness of diversity (OTUs richness) throughout the decomposition process, and shifted the litter biota toward lower bacterial evenness of diversity (OTUs evenness), with higher relative abundances of fungi and herbivores at the humus-near stage. Nutrient enrichment also modulated leaf and root litter micro-food webs in different ways. NP addition had stronger positive effects on leaf litter bacterial oligotrophs:copiotrophs at the early stage, and stronger positive effects on root litter fungi:bacteria, but stronger negative effects on leaf litter fungal oligotrophs:copiotrophs at the humus-near stage. Overall, our results indicate that nutrient enrichment significantly alters microbes and microfauna associated with litter decomposition in subtropical forests, with important consequences for nutrient replenishment and soil organic carbon formation.
期刊介绍:
Forest Ecology and Management publishes scientific articles linking forest ecology with forest management, focusing on the application of biological, ecological and social knowledge to the management and conservation of plantations and natural forests. The scope of the journal includes all forest ecosystems of the world.
A peer-review process ensures the quality and international interest of the manuscripts accepted for publication. The journal encourages communication between scientists in disparate fields who share a common interest in ecology and forest management, bridging the gap between research workers and forest managers.
We encourage submission of papers that will have the strongest interest and value to the Journal''s international readership. Some key features of papers with strong interest include:
1. Clear connections between the ecology and management of forests;
2. Novel ideas or approaches to important challenges in forest ecology and management;
3. Studies that address a population of interest beyond the scale of single research sites, Three key points in the design of forest experiments, Forest Ecology and Management 255 (2008) 2022-2023);
4. Review Articles on timely, important topics. Authors are welcome to contact one of the editors to discuss the suitability of a potential review manuscript.
The Journal encourages proposals for special issues examining important areas of forest ecology and management. Potential guest editors should contact any of the Editors to begin discussions about topics, potential papers, and other details.