GB/T 41339.4-2023 (English Version)

Standard No.: GB/T 41339.4-2023
Language: Chinese, Available in English version
Release Date: 2023
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 41339.4-2023

Scope: This document provides guidance and suggestions on the basic principles, overall process, analysis and diagnosis, program formulation and implementation of seagrass bed ecological restoration. This document is applicable to seagrass bed ecological restoration work.

Introduction

GB/T 41339.4—2023 Standard Overview

National Standard of the People's Republic of China GB/T 41339.4—2023 "Technical Guidelines for Marine Ecological Restoration Part 4: Seagrass Bed Ecological Restoration" provides a comprehensive technical guide for guiding and regulating seagrass bed ecological restoration work. This standard was proposed by the Ministry of Natural Resources and aims to protect and restore the seagrass bed ecosystem and improve the effectiveness of restoration.

Core Principles of Seagrass Bed Ecological Restoration

1. Natural restoration as the main method and artificial restoration as the auxiliary method

Emphasis on respecting the laws of nature and giving priority to natural restoration measures. For slightly damaged seagrass beds, natural restoration is the main method; for severely degraded seagrass beds, artificial restoration is combined.

2. Overall consideration and system coordination

Comprehensively consider the interaction of multiple factors such as land, ocean and coastal wetlands, avoid ecological isolation, and improve the overall stability and connectivity of regional ecosystems.

3. Adapt to local conditions and implement different strategies

Develop differentiated restoration strategies based on the ecological habits and degree of degradation of different seagrass species. Give priority to local species and focus on ecological adaptability.

4. Adapt management, adjustment and optimization

Implement full-process monitoring and evaluation, dynamically adjust the plan according to the restoration effect, and ensure the scientificity and effectiveness of the restoration measures.

Key points of seagrass bed ecological restoration technology

1. Habitat improvement

Restore suitable habitat conditions through measures such as reducing pollution, improving water quality, and removing invasive species. Specifically include:

Bottom treatment: cleaning up garbage and invasive plants;
Water flow control: building breakwaters to reduce flow velocity;
Water quality optimization: reducing pollutant emissions and improving light conditions.

2. Transplantation restoration method

Applicable to the rapid restoration of degraded seagrass beds. The main steps include:

Grass block transplantation: digging grass blocks from healthy seagrass beds and transplanting them to the restoration area;
Plant transplantation: separating seagrass plants and directly inserting or tying them for fixation.

3. Seed restoration method

Using seagrass seeds for ecological restoration, suitable for species with high seed yields. Methods include:

Direct sowing: Sowing treated seeds into the restoration area;
Mud box/mud ball sowing: Wrapping seeds before planting to improve survival rate.

4. Comprehensive restoration method

For severely degraded areas, a combination of habitat improvement, transplantation and seed restoration measures are used to comprehensively improve ecological functions.

Comparison table of standard frameworks

Dimensions	GB/T 41339.4—2023	Comparison standards (such as ISO, etc.)	Advantage analysis
Technical requirements	Detailed provisions for the diagnosis, site selection and feasibility of seagrass bed restoration	Not clear or relatively general	More operational, detailed to the key points of each link.
Restoration methods	Comprehensively cover technologies such as habitat improvement, transplantation and seed restoration	Only cover some restoration methods	Provide a variety of restoration options.
Monitoring and evaluation	Emphasis on monitoring the entire process and dynamic adjustment and optimization	Lack of a clear monitoring framework	Ensure the evaluability and sustainability of restoration effects.

Implementation recommendations and precautions

1. Management measures

Establish protected areas, control the intensity of fishing and aquaculture, reduce pollution emissions, and strengthen the supervision of tourism activities.

2. Technical measures

Give priority to local seagrass species, scientifically plan the density and time of transplantation, and ensure the preservation and transportation conditions of transplanted units.

3. Monitoring and evaluation

Regularly conduct ecological restoration effect evaluation, dynamically adjust the restoration plan, and establish a long-term monitoring mechanism.

Summary and Outlook

GB/T 41339.4—2023 standard provides scientific guidance and technical support for seagrass bed ecological restoration, which helps to improve the service functions of marine ecosystems. In the future, we should strengthen the promotion and implementation of the standard and the evaluation of its implementation effect, promote technological innovation and international cooperation, and further improve the restoration technology system.

GB/T 41339.4-2023 Referenced Document

GB 18668 Marine sediment quality
GB 3097 Sea water quality standard
GB/T 41339.1-2022 Technical guideline for marine ecological restoration—Part 1: General
HY/T 083 Technical specification for eco-monitoring of seagrass bed

GB/T 41339.4-2023 history

2023 GB/T 41339.4-2023 Marine Ecological Restoration Technical Guide Part 4: Seagrass Bed Ecological Restoration

GB/T 41339.4-2023