Ecosystem carbon storage in forest fragments of differing patch size.

Area of Science:

• Ecology
• Forestry
• Environmental Science

Background:

• Forest fragmentation poses a significant threat to ecosystem carbon storage.
• Understanding carbon density distribution in fragmented forests of varying patch sizes is crucial but poorly documented.
• Edge effects in fragmented ecosystems can alter carbon dynamics.

Purpose of the Study:

• To investigate ecosystem carbon density in fragmented forests.
• To assess the influence of patch size and edge effects on carbon density.
• To provide data for forest management and carbon stock evaluation.

Main Methods:

• Quantification of aboveground biomass using allometric equations.
• Estimation of carbon density through analysis of carbon concentration in ecosystem components.
• Soil and fine root sampling to analyze carbon and nitrogen heterogeneity.

Main Results:

• Ecosystem carbon density varied significantly with fragment size, from 173.9 Mg ha⁻¹ in small fragments to 341.1 Mg ha⁻¹ in contiguous forests.
• Trees and mineral soil were the primary contributors to the ecosystem carbon pool (46.5% and 50.2%, respectively).
• Soil and fine root carbon and nitrogen content exhibited high heterogeneity across fragment sizes and soil depths.

Conclusions:

• Ecosystem carbon density in forest fragments is significantly influenced by patch size and edge effects.
• Fragmented forests in southern China are critical for the carbon budget and require immediate conservation efforts.
• Findings can inform landscape-scale carbon stock assessments and forest management strategies.