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Soil Carbon And Nutrient Dynamics Following Cessation Of Anthropogenic Disturbances In Degraded Subtropical Forests
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Soil Carbon And Nutrient Dynamics Following Cessation Of Anthropogenic Disturbances In Degraded Subtropical Forests

by Han Y.H. Chen
December 11, 2017
1
Subtropical forest (Public Domain Pictures)

Subtropical forest (Public Domain Pictures)

Soil carbon (C) and nutrients are fundamental to forest biodiversity and function. Forest degradation has led to the reduction in soil C and nutrients in global forests, particularly in a tropical biome where human population density is high. Ecological restoration of degraded forests can increase soil C and nitrogen (N), but the dynamics of plant essential nutrients such as phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) in soil following restoration, however, are largely unknown.

In a recent paper published in Land Degradation & Development (Feng et al. 2017), researchers from Anhui Agricultural University in China and Lakehead University in Canada studied how soil pH, bulk density, organic matter, water content, C stock and C, N, P, K, Ca, and Mg concentrations changed over time following the cessation of anthropogenic disturbances in subtropical forests in China. They also examined how the stoichiometric (mass concentration) ratios of C vs. nutrients and N vs. P respond over time following the cessation of anthropogenic disturbances.

The study found that stand basal area, soil water content, organic matter content, and C concentration and stock increased, while soil pH and bulk density decreased over time, with the most pronounced effects in topsoil layer. Total and available N and K, as well as available P and total Mg, increased, but total P in the 20-30 cm layer and Ca in all soil layers decreased over time. The mass concentration ratios of soil C to total N and available N, P, and K decreased, whereas those for C to total P and Ca as well as total N to total P and available N to available P increased over time.

The findings of the study indicate that C and biologically driven nutrients increase, and geochemically driven nutrients in soil decrease, while plant biomass accumulates following restoration. This study suggests that ecological restoration through the cessation of anthropogenic disturbances in degraded mountain forests increase ecological functions and prevent soil nutrient loss.

The study, Soil Carbon and Nutrient Dynamics Following Cessation of Anthropogenic Disturbances in Degraded Subtropical Forests was recently published in the journal Land Degradation & Development.

About The Author

Han Y.H. Chen

In our research lab, we are intrigued by causes of biological diversity, ecosystem functioning, and nutrient dynamics. We strive to contribute to societal decision-making process in ways to assure ecological sustainability of natural and managed ecosystems in a changing environment.

Large spatial and long temporal scales are characteristics of our research. Most of research projects are implemented in boreal and northern temperate forest ecosystems. In the meantime, we are interested in terrestrial ecosystem processes at the globe scale by critically evaluating published literature and collaborating with researchers in other countries.

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Comments 1

  1. XiaoY Zhu says:
    4 weeks ago

    I am very intrested with your paper, i hope that i can download and read the whole paper

    Reply
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