GB/T 41339.4-2023 Technical guideline for marine ecological restoration — Part 4: Ecological restoration of seagrass bed
1 Scope
This document provides guidance and suggestions on the basic principles, overall process, analysis and diagnosis, plan development and implementation of ecological restoration of seagrass bed.
This document is applicable to the ecological restoration of seagrass bed.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 3097 Marine water quality standard
GB/T 12763 (all parts) Specifications for oceanographic survey
GB/T 17378 (all parts) The specification for marine monitoring
GB 18668 Marine sediment quality
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
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
seagrass
monocotyledonous angiosperms that can live completely in seawater or brackish water at estuaries
Note: Seagrass belongs to the order Alismatales. The seagrasses distributed in China include four families, namely Zosteraceae, Cymodoceaceae, Hydrocharitaceae and Ruppiaceae.
3.2
seagrass bed
seagrass community with a certain area
Note: It is generally believed that when the area of a seagrass community exceeds 100m2, it is called a seagrass bed.
3.3
ecological restoration of seagrass bed
process of assisting in the restoration of degraded, damaged or destroyed seagrass bed ecosystems
3.4
transplanting unit
basic unit that takes seagrass plugs or only plants as the transplantation object
Note: It includes seagrass plug transplanting unit and plant transplanting unit.
3.5
seagrass plug
collection composed of seagrass plants and substrate
3.6
shoot
above-ground part of seagrass plant
Note: It generally includes leaf sheaths and leaves.
3.7
seedling
young plants formed after the seagrass seeds germinate
3.8
reproductive shoot
shoots of seagrass develop into reproductive organs, such as flowers, fruits and seeds, after they enter the flowering period
4 Basic principles
4.1 Nature as the mainstay and artificial activities as a supplement
Respect the attributes of nature, follow the laws of nature, and adhere to the principle of natural restoration as the mainstay and artificial restoration as a supplement. For seagrass bed ecosystems with relatively minor damage, measures mainly focused on natural restoration should be adopted. For the seagrass bed ecosystems with severely damage, it is advisable to adopt a combination of artificial restoration and natural restoration. By taking artificial restoration measures to restore the degraded seagrass communities, and then relying on the natural resilience to restore the structure and function of the seagrass bed ecosystem.
Foreword I
Introduction II
1 Scope
2 Normative references
3 Terms and definitions
4 Basic principles
5 Overall process
6 Analysis and diagnosis
7 Plan development
8 Plan implementation
9 Ecological restoration technology of seagrass bed
Annex A (Informative) Report format for ecological restoration, transplantation and planting record of seagrass bed
