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Carbon dynamics in three subtropical forest ecosystems in China
Zhongrui Zhang1,2,3, Quanlin Zhong4,5, Dongliang Cheng6,7
1Fujian Provincial Key Laboratory of Plant Ecophysiology, Fujian Normal University, Fuzhou, 350007, Fujian Province, China.
Environmental Science and Pollution Research International
|February 21, 2020
Summary
Forest carbon sequestration capacity varies with age and type. Young coniferous forests show higher topsoil carbon but declining overall stocks, while broad-leaved forests increase their carbon sequestration over time.
Area of Science:
- Forest Ecology
- Carbon Sequestration Studies
- Ecosystem Carbon Dynamics
Background:
- Forest ecosystems play a crucial role in carbon sequestration, influenced by age, soil, and climate.
- Understanding carbon dynamics in below-canopy and soil components is vital for accurate ecosystem assessments.
Purpose of the Study:
- To measure and assess carbon dynamics in three distinct forest ecosystems: Cunninghamia lanceolate, Pinus massoniana, and Evergreen broad-leaved forests.
- To evaluate the impact of forest age and type on carbon content and density across various ecosystem components.
Main Methods:
- Inventory data from Fujian Provincial forest resources were utilized.
- Carbon content and density were measured in canopy, shrub, understory vegetation, litter, and soil.
- Carbon dynamics were assessed across different age groups within the selected forest types.
Main Results:
- Canopy layer carbon content increased with forest age.
- Young Cunninghamia lanceolate and Pinus massoniana forests exhibited higher topsoil carbon (0-30 cm).
- Coniferous forests showed a decline in carbon stocks from 1996-2007, while broad-leaved forests increased theirs.
Conclusions:
- The traditional 0.5 carbon content coefficient may underestimate sequestration potential, particularly in mature forests.
- Coniferous forests experience a temporary reduction in ecosystem carbon stocks 10-20 years post-afforestation, impacting carbon budgets.
- Forest age and type significantly influence carbon sequestration dynamics and soil carbon storage.
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