Ecosystem Dynamics in Mixed-Species Forest Plantations

Mixed-species forest plantations integrate two or more tree species in a single stand, offering a multifunctional approach to forestry that balances timber production with ecosystem services. By harnessing species-specific traits—such as nitrogen fixation by legumes, deep rooting by certain trees and rapid canopy establishment—these plantations enhance overall productivity, resilience to pests and pathogens and resource-use efficiency. Interactions between tree canopies and the understory regulate light penetration and microclimate, influencing soil moisture and temperature. Below ground, the rhizosphere microbial community and rates of nutrient cycling respond to diverse litter inputs and root exudates, driving soil organic matter formation and carbon sequestration. Such plantations can stabilise soils, improve water conservation and support biodiversity, particularly in degraded landscapes. Globally, research shows that mixed stands often outperform monocultures in biomass accumulation, nutrient retention and long-term sustainability, making them a cornerstone of adaptive forest management under climate change.

Research from Nature Portfolio

Long-term experimental work revisited a reforestation trial eight years after planting to assess how tree species composition affects soil nitrogen dynamics. Findings revealed that plots with nitrogen-fixing Acacia monocultures and mixed-species assemblages exhibited elevated dissolved organic nitrogen and higher net rates of nitrogen mineralisation compared with Eucalyptus monocultures. Mixed plantations maintained rates of nitrogen transformation comparable to Acacia monocultures, while also fostering greater dissolved organic carbon. These outcomes underline the capacity of mixed-species stands to sustain soil fertility and enhance biogeochemical cycling, supporting recommendations for diversified species mixtures in restoration of degraded subtropical landscapes.

Ecosystem Dynamics in Mixed-Species Forest Plantations publication trend

The graph below shows the total number of articles in ecosystem dynamics in mixed-species forest plantations across all publications each year (not limited to Nature Index journals).

Technical terms

Mixed-species plantation: A forestry stand composed of two or more tree species planted together to leverage complementary ecological functions and improve resilience.

Nutrient cycling: The movement and transformation of essential elements (such as carbon, nitrogen and phosphorus) through living organisms, litter, soil and atmosphere within an ecosystem.

Rhizosphere: The narrow zone of soil immediately surrounding plant roots, where root exudates shape microbial communities and biogeochemical processes.

Mycorrhizal fungi: Symbiotic fungi that colonise plant roots, enhancing water and nutrient uptake in exchange for carbon from the host plant.

Litter decomposition: The breakdown of fallen leaves, twigs and other plant residues by microbes and fauna, releasing nutrients back into the soil.

References

1. Reforestation in southern China: revisiting soil N mineralization and nitrification after 8 years restoration. Scientific Reports (2016).
2. Effects of species mixture on understory vegetation, soil properties and bacterial diversity of Acacia cincinnata, Eucalyptus robusta and Acacia mangium plantations in Southeastern China. Plant Stress (2023).
3. Mycobiome structure does not affect field litter decomposition in Eucalyptus and Acacia plantations. Frontiers in Microbiology (2023).