Method for replacing spartina alterniflora community with suaeda salsa community in intertidal zone of mud flat

Abstract

The invention belongs to the technical field of environmental restoration, and discloses a method for replacing a spartina alterniflora community with a suaeda salsa community in an intertidal zone of mud flat. The method comprises the steps that a cofferdam dam is constructed; after enclosure is conducted and before the new seedlings of spartina alterniflora are unearthed, water is stored to water the land; the watering time generally starts from winter or early spring of the next year; water is drained at the end of the current year after the stored water waters the spartina alterniflora habitat for more than 6 months or in mid-to-late April of the next year to expose the earth surface, and the field is naturally aired until the soil surface has dry crack gaps; local suaeda salsa seeds are selected and sown after the tide and when no extra heavy rain exists within 4-6 days; a water storage dam at a water inlet and a water outlet of a frame enclosure area is transformed into an overflow dam, and the overflow dam is enabled to be as high as or lower than the ground surface in the frame enclosure area; the reed and the spartina alterniflora are removed in a manual removing or chemical weeding mode to purify the suaeda salsa community. According to the method, the coastal mud flat wetland habitat is recovered, and the regional biodiversity can be protected.

Description

technical field [0001] The invention belongs to the technical field of environmental restoration, and in particular relates to a method for replacing Spartina alterniflora community with Suaeda salsa community in tidal flat intertidal zone. Background technique [0002] At present, tidal flat wetland areas are also ecologically fragile areas. In recent years, tidal flat ecology has gradually changed due to factors such as tidal flat improvement, invasion of malignant plants, and human disturbance. At present, the original Suaeda salsa habitat in the tidal flat wetland area of ​​Yancheng has been greatly reduced after being invaded by Spartina alterniflora and reeds, which has caused the destruction and degradation of the wetland habitat, resulting in the loss of environmental functions and ecological problems. Wetland landscapes become fragmented. Therefore, the scientific control of Spartina alterniflora followed by the population recovery practice of native Suaeda salsa p...

AI Technical Summary

Problems solved by technology

[0007] At present, Spartina alterniflora spreads in a large area along the tidal flats and coastal areas, and the single community formed has seriously reduced the biodiversity of the tidal flats, and has had an impact on the optimization of tidal flat communities and the stability of habitats and feeding grounds for rare birds, especially Spartina alterniflora. Spartina has seriously encroached on the habitat of Suaeda salsa and compressed the living space of Suaeda salsa. Although there have been small-scale successful trials on the control of Spartina alterniflora, the cost is high and the control effect is difficult to maintain. Furthermore, there is no stable other plant communities Effective replacement of Spartina alterniflora colonies, high chance of Spartina alterniflora reoccurrence

Images