Fine Roots in Forest Ecosystems

Dear Colleagues,

Fine roots, traditionally defined as roots with diameters of <2 mm or functionally classified into absorptive and transport fine roots, are a critical component of forest ecosystems. They are responsible for plant water and nutrient uptake and transport, as well as play key roles in tree growth and stand development. Fine root production accounts for roughly 20% of global forest primary productivity, and fine root mortality and exudates serve as key inputs of organic matter (OM) in soils. Fine-root-derived OMs are major food resources for soil fauna and nutrient resources for plants. Fine-root-derived OMs are transformed into soil OMs and respired back into atmosphere as CO₂. The living roots break up compaction and improve water infiltration and retention. They build stable soil aggregates and foster a robust, microbiologically active rhizosphere, both of which influence soil water, nutrients and carbon cycling processes. A healthy root system is essential for forest ecosystems to function. However, climate-change-induced rising temperatures, sea level rise, droughts, floodings, wildfires, loss of plant and animal species and outbreaks of pest and diseases pose significant threats to world forests. In addition, deforestation and poor forest management could greatly damage forest root systems. A comprehensive understanding of fine root responses to environmental cues and the interactions between fine roots and other plant organs and symbiotic soil microbes is urgent. This Special Issue welcomes papers covering the following topics: fine root ecology, morphology, anatomy and physiology; monitoring work; new methods; fine root symbiotic relationships; intercorrelations between fine roots and other organs and the effects of climate change and forest management.

Dr. Xuefeng Li
Guest Editor

Manuscript Submission Information

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