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A method for restoration of fish habitat in degraded marsh wetland

A wetland and swamp technology, applied in the field of degraded swamp wetland habitat restoration, can solve problems such as reducing the ecological function of migratory birds transiting and resting places, and achieve the effect of ecological function restoration

Active Publication Date: 2020-11-06
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problem that the existing marsh wetland becomes a degraded marsh without water and fish, which reduces the ecological function as a stopover place for migratory birds, and provides a method for restoring fish habitat in degraded marsh wetland

Method used

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  • A method for restoration of fish habitat in degraded marsh wetland
  • A method for restoration of fish habitat in degraded marsh wetland
  • A method for restoration of fish habitat in degraded marsh wetland

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0019] Specific implementation mode 1: This implementation mode is a method for restoration of fish habitat in a degraded swamp wetland, specifically carried out according to the following steps:

[0020] 1. Habitat space suitability restoration:

[0021] ①. Enlarging the living space of fish: digging down the silt in the natural water area connected with the river in the marsh wetland to increase the water storage capacity; The water depth in the post-marsh wetland is 0.7m~0.75m;

[0022] ②. Create a wintering habitat for fish: dig down at the end of the natural water accumulation zone connected to the river in the marsh wetland near the river inlet to meet the fish's safe wintering requirements, and create a wintering area;

[0023] Said meeting the fish safety overwintering requirements is to dig down to the water depth under the ice surface in winter is 1.3m ~ 1.4m;

[0024] The area of ​​the wintering area is 0.4% to 0.45% of the submerged area of ​​the marsh during the...

specific Embodiment approach 2

[0029] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the natural water accumulation zone described in step ① is a channel, a river or a dish-shaped depression. Others are the same as the first embodiment.

specific Embodiment approach 3

[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 1 ①, the natural water accumulation zone connected to the river in the marsh wetland is dug down until the summer flood subsides and the water depth is 0.75m. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a degenerated marsh wetland fish habitat restoration method. The technical problem that an existing marsh wetland becomes degenerated marsh without water or fish, and the ecological function of serving as transit rest land of migrating birds is lowered is solved. Accordingly, a habitat space is suitably restored, and a breeding habitat is suitably restored. For the restored marsh wetland, after a flood recedes, the number of fishes stuck in the marsh wetland is obviously increased compared with that before restoration, the increment of fish weight is 150.1%, and the increment of the number of individuals is 99.4%; a certain number of fish resources can be kept in autumn and spring for the birds to eat, and then the originally lost ecological function of serving asthe transit rest land of the migrating birds in autumn and spring is restored.

Description

technical field [0001] The invention relates to a method for restoring a degraded swamp wetland habitat. Background technique [0002] Swamp wetland is a common habitat for fish and birds, and it is also an important part of wetland-type nature reserves. Heilongjiang Zhalong National Nature Reserve, Jilin Momoge National Nature Reserve and Jilin Xianghai National Nature Reserve, which are located in the water network area of ​​Songnen Plain, are all marsh and wetland nature reserves, which serve as transit stops for migratory birds Land is one of its main ecological functions. Fish in wetlands are an important source of food for these resting birds, and the abundance of forage fish resources determines the number of transiting resting birds, and also determines the sustainability of the ecological functions of these wetland-type nature reserves. [0003] The marsh wetland in the Songnen Plain is closely related to the river. In the summer flood season, a "river-swamp" com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/10A01G22/00
CPCA01G22/00A01K61/10Y02A40/22Y02A40/81
Inventor 杨富亿文波龙
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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