GB/T 42340-2023 in English

1. Standard Overview

GB/T 42340—2023Ecosystem Assessment - Methods for Ecosystem Pattern and Quality Evaluation is the latest national standard issued by the People's Republic of China. It aims to guide the evaluation of regional ecosystem pattern and quality based on ecosystem spatial distribution data. The standard was proposed by the Ministry of Natural Resources and approved by the State Administration for Market Regulation and the National Standardization Administration.

2. Background of Standard Formulation

With the deepening of ecological civilization construction, ecosystem protection and restoration have become an important part of the national sustainable development strategy. The formulation of this standard is based on the following background:

• To address the global challenges of climate change and biodiversity loss.
• To achieve the coordination and unity of ecological protection and economic and social development.
• To standardize ecosystem assessment methods and provide a scientific basis for policy formulation.

3. Comparison of standard frameworks

4. Detailed explanation of the standard content

4.1 Ecosystem pattern evaluation

The evaluation of ecosystem pattern is mainly carried out from the following aspects:

• Ecosystem composition and its changes: Through remote sensing interpretation and historical data analysis, the area proportion and change rate of various ecosystems are evaluated.
• Landscape pattern characteristics: Including indicators such as the number of patches, average patch area, and boundary density, reflecting the degree of fragmentation of the ecosystem.

4.2 Ecosystem quality evaluation

The evaluation of ecosystem quality focuses on:

• Biomass density: Calculated using the vegetation index-biomass regression method and the NPP accumulation method.
• Coverage: Obtain coverage of ecosystems such as grasslands and forests through satellite remote sensing data.

5. Implementation Recommendations