Ecological method for controlling excessive proliferation of periphytic filamentous algae through submerged plant patch mosaic pattern
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A technology for submerged plants and filamentous algae, which is applied in the fields of botanical equipment and methods, plant cultivation, chemical instruments and methods, etc., can solve problems such as single underwater ecological niche, and achieve the effect of simple operation and reasonable design.
Active Publication Date: 2016-08-10
INST OF AQUATIC LIFE ACAD SINICA
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The method is simple to operate, reasonable in design, ecological and environmentally friendly, and is easy to be widely promoted. It can quickly construct a composite community of submerged plant patch mosaic patterns, form an underwater forest distribution pattern with a vertical gradient of "upper-middle-lower", and fully occupy the underwater forest. Ecological niche, competing w
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Embodiment 1
[0022] A kind of submerged plant patch mosaic controls the ecological method of excessive proliferation of filamentous algae, and its steps are:
[0023] 1) In this example, a number of aquariums 1 with the same specifications (L × W × H = 70 cm × 50 cm × 80 cm) were selected outside the laboratory, and lake mud with a thickness of about 15 cm was laid in the aquarium, and the water depth was added to 60 cm Left and right, each aquarium is a mosaic pattern recovery area for submerged plants.
[0024] 2) According to the plant height, leaf area and root system characteristics of submerged plants and whether they have allelopathic algae-inhibiting effects, select suitable submerged plants of type 2 (Littleweed), type 3 (hydra, hornwort), crown The layer height is large 4 (one kind or any combination of foxtail algae, grate eye vegetable and micro tooth eye vegetable).
[0025] 3) Scientifically and rationally design the patch mosaic pattern of submerged plants according to thei...
Embodiment 2
[0030] A kind of submerged plant patch mosaic controls the ecological method of excessive proliferation of filamentous algae, and its steps are:
[0031]1) Investigate the water environment characteristics such as water depth, water flow, transparency, sediment, nutrients, plankton and filamentous algae in the Maojiabu Lake area in the westward waters of Hangzhou West Lake, and select the waters near Dingjiashan as the mosaic of submerged plant patches To control the over-proliferation pilot area of filamentous algae, design the mosaic pattern area of submerged plant patches (36m × 25m=900 m 2 ) and shape (rectangular), the water depth in this area is within the range of 1.1-1.8 m.
[0032] 2) Nail piles every 4 or 5 or 6m along the periphery of the pilot test area, use a strong and fine nylon net to fence, and drop the net to contact the substrate. If there are many herbivorous fish in the restoration area of submerged plant patch mosaic pattern, they can be artificial...
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Abstract
The invention discloses an ecological method for controlling excessive proliferation of periphytic filamentous algae through a submerged plant patch mosaic pattern. The ecological method comprises steps as follows: 1), water environment features including water depth, water flow, transparency, sediments, nutritive salts, plankton and the filamentous algae of a to-be-restored area are surveyed; 2), purse seining is performed by the aid of nylon ropes, a purse seine is dropped to be contacted with the sediments, and if a number of herbivorous fishes exist in the submerged plant patch mosaic pattern restoration area, the herbivorous fishes are expelled manually; 3), submerged plant species are selected according to the restoration area water environment obtained through the survey; 4), the submerged plant patch mosaic pattern is designed according to underwater ecological niche, growth and propagation features and water level of submerged plants; 5), submerged planting is performed in a clustering manner according to the designed submerged plant patch mosaic pattern; 6), the growth vigor of the submerged plants is monitored regularly. With the adoption of the ecological method, the problems of low survival rate and single underwater ecological niche of the submerged plants are solved, and the cover degree of the restored submerged plants is up to 70%; abnormal proliferation of the low-grade periphytic filamentous algae in a lake with eutrophication is effectively controlled, and the growth rate of the periphytic filamentous algae is reduced by 35% averagely.
Description
technical field [0001] The invention belongs to the fields of ecological restoration of landscape water bodies and surface water quality improvement and improvement, and more specifically relates to an ecological method for controlling the excessive proliferation of filamentous algae by constructing a mosaic pattern of submerged vegetation patches in shallow water eutrophic lakes, which is suitable for shallow water The control and management of lake eutrophication, and the transformation of algae-turbid water body to water grass-clear water body. Background technique [0002] The eutrophication of shallow lakes, reservoirs and other water bodies will affect regional economic development and social harmony, so it has received more and more attention from all walks of life. In particular, the outbreak of filamentous algal blooms will consume a large amount of dissolved oxygen in the water body, release toxins, cause water pollution, and affect the growth of other aquatic orga...
Claims
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