NL2004414C2 - Method for improving an ecosystem in a lake or other shallow water. - Google Patents

Method for improving an ecosystem in a lake or other shallow water. Download PDF

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Publication number
NL2004414C2
NL2004414C2 NL2004414A NL2004414A NL2004414C2 NL 2004414 C2 NL2004414 C2 NL 2004414C2 NL 2004414 A NL2004414 A NL 2004414A NL 2004414 A NL2004414 A NL 2004414A NL 2004414 C2 NL2004414 C2 NL 2004414C2
Authority
NL
Netherlands
Prior art keywords
lake
substances
algae
blue
green algae
Prior art date
Application number
NL2004414A
Other languages
Dutch (nl)
Inventor
Maarten Hoorn
Original Assignee
Science In Water B V
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Science In Water B V filed Critical Science In Water B V
Priority to NL2004414A priority Critical patent/NL2004414C2/en
Application granted granted Critical
Publication of NL2004414C2 publication Critical patent/NL2004414C2/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
    • A01N65/03—Algae

Description

Method for improving an ecosystem in a lake or other shallow water
The invention relates to a method for improving an ecosystem in a lake or other shallow water which is loaded with blue and green algae.
During the past decades much research has been spent on 5 improving the ecosystem of lakes. For instance the article On the dominance of filamentous cyanobacteria in shallow, turbid lakes by Marten Scheffer et.al., Ecology, 78(1), 1997, pp. 272-282 analyzes patterns of cyanobacterial dominance and shows that this relates to two alternative equilibria of the algal coiranu-10 nity. The article discusses that cyanobacteria are in comparison with algae the superior competitors under conditions of low light and promote such conditions, as they can cause a higher turbidity per unit of phosphorous than algae.
WO 98/42626 acknowledges that the progressive eutrophi-15 cation of estuarine and freshwater systems is often reflected in an increase in both phytoplankton bloom frequency and biomass, often with a shift to more nuisance species such as cyanobacteria . Focus of the research has been on reducing inputs of nutrients, in particular phosphorous. This document therefore pro-20 poses a method for remediating matter (such as sediments in waterways and catchments, or effluent from sewage treatment plants, industry or aquaculture) by removing phosphorous and oxyanion pollutants therefrom by contacting the matter with a substrate modified with complexing elements selected from Group 25 IIIB, lantanides, and Group IVB elements.
As opposed to the prior art the invention concerns a method for improving an ecosystem in a lake or other shallow water which is loaded with blue and green algae, wherein a competitive advantage of blue algae over green algae is reduced.
30 The invention is based on the insight that it is the competitive advantage of blue algae over green algae that is a prime cause for turbidity of many lakes. By reducing or removing this competitive advantage the influence of the blue algae may be reduced and turbidity of the lake may be prevented.
35 In order to reduce the competitive advantage of the blue algae over green algae desirably one or more substances are supplied to the lake to reduce the propagation of light at wavelengths for which blue algae have a higher sensitivity than do 2 green algae. In this way the growth conditions of blue algae can be brought to the same level or lower than the growth conditions of green algae.
In order to attain the object of the invention it is 5 preferable that one or more substances are supplied to the lake to reduce the propagation of light at wavelengths in the range 550-625 nanometers. This is based on the insight that blue algae have in common with green algae that they are highly sensitive to light in the range 420-465 nanometers. Blue algae however are 10 also sensitive to light in the range 550-625 nanometers, whereas green algae do not respond to this range. By blocking or reducing the light in the range 550-625 nanometers, the competitive advantage of blue algae over green algae is removed or at least reduced.
15 Preferably the substances are supplied to the lake at a depth between 1 and 2 m. The level of light propagation at this depth is representative for the general conditions prevailing in the lake. Beneficially the light propagation at this depth is also monitored in order to control the amount of substances that 20 are supplied to the lake.
It is further important that the substances are spread out through the lake by means of naturally present streams and swirls. This avoids too high local concentrations of the substances.
25 Suitable substances for reducing the competitive advan tage of blue algae over green algae the lake are selected from the group comprising humic acid, fulvic acid, ulmic acid, lignin containing and other vegetable matter, molasses, including their complexes with metals .

Claims (6)

1. Werkwijze voor het verbeteren van een ecosysteem in een meer of ander ondiep water welke belast is met blauwe en groene algen, met het kenmerk, dat een concurrentievoordeel van blauwe algen ten opzichte van groene algen wordt verminderd.A method for improving an ecosystem in more or other shallow water loaded with blue and green algae, characterized in that a competitive advantage of blue algae over green algae is reduced. 2. Werkwijze volgens conclusie 1, met het kenmerk, dat één of meer stoffen aan het meer worden toegevoegd voor het verminderen van de lichtpropagatie op golflengten voor welke blauwe algen een hogere gevoeligheid bezitten dan groene algen.Method according to claim 1, characterized in that one or more substances are added to the lake to reduce the light propagation at wavelengths for which blue algae have a higher sensitivity than green algae. 3. Werkwijze volgens conclusie 1 of 2, met het kenmerk, 10 dat één of meer stoffen aan het meer worden toegevoegd voor het verminderen van de lichtpropagatie bij golflengten in het bereik 550-625 nanometer.3. Method as claimed in claim 1 or 2, characterized in that one or more substances are added to the lake for reducing the light propagation at wavelengths in the range 550-625 nanometers. 4. Werkwijze volgens één der voorgaande conclusies 2 of 3, met het kenmerk, dat de stoffen worden toegevoegd aan het 15 meer op een diepte tussen 1 en 2 m.4. Method as claimed in any of the foregoing claims 2 or 3, characterized in that the substances are added to the lake at a depth between 1 and 2 m. 5. Werkwijze volgens één der voorgaande conclusies 2-4, met het kenmerk, dat de stoffen door het meer verspreid worden door middel van natuurlijk aanwezige stromen en wervelingen.A method according to any one of the preceding claims 2-4, characterized in that the substances are spread through the lake by means of naturally present streams and swirls. 6. Werkwijze volgens één der voorgaande conclusies, met 20 het kenmerk, dat voor het verminderen van het concurrentievoordeel van blauwe algen ten opzichte van groene algen het meer voorzien wordt van stoffen die geselecteerd zijn uit de groep omvattende humuszuur, fulvinezuur, ulminezuur, lignine omvattende en andere vegetatiematerialen, melasse, daaronder begrepen de 25 complexen die deze vormen met metalen.6. A method according to any one of the preceding claims, characterized in that for reducing the competitive advantage of blue algae over green algae, it is more provided with substances selected from the group comprising humic acid, fulvic acid, ulmic acid, and lignin comprising and other vegetation materials, molasses, including the complexes that they form with metals.
NL2004414A 2010-03-17 2010-03-17 Method for improving an ecosystem in a lake or other shallow water. NL2004414C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL2004414A NL2004414C2 (en) 2010-03-17 2010-03-17 Method for improving an ecosystem in a lake or other shallow water.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2004414 2010-03-17
NL2004414A NL2004414C2 (en) 2010-03-17 2010-03-17 Method for improving an ecosystem in a lake or other shallow water.

Publications (1)

Publication Number Publication Date
NL2004414C2 true NL2004414C2 (en) 2011-09-20

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NL2004414A NL2004414C2 (en) 2010-03-17 2010-03-17 Method for improving an ecosystem in a lake or other shallow water.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102599192A (en) * 2012-01-31 2012-07-25 清华大学深圳研究生院 Application of sodium humate in inhibiting growth of red tide algae
CN109574432A (en) * 2019-01-02 2019-04-05 上海园林绿化建设有限公司 A kind of lake water Ecosystem restoration system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1374375A (en) * 1972-01-14 1974-11-20 Aquashade Inc Method for controlling the growth of aquatic plants
JPS62408A (en) * 1985-06-26 1987-01-06 Nippon Carbide Ind Co Ltd Novel plant growth regulator
US4781843A (en) * 1987-12-11 1988-11-01 Dubois Chemicals, Inc. Chemical treatment for algae control in open water systems
JPH07163988A (en) * 1994-12-09 1995-06-27 Osaka Prefecture Light shading plate for water treating equipment
JP2007068419A (en) * 2005-09-05 2007-03-22 Japan Science & Technology Agency Method for inhibiting increase of harmful algae causing red tide

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1374375A (en) * 1972-01-14 1974-11-20 Aquashade Inc Method for controlling the growth of aquatic plants
JPS62408A (en) * 1985-06-26 1987-01-06 Nippon Carbide Ind Co Ltd Novel plant growth regulator
US4781843A (en) * 1987-12-11 1988-11-01 Dubois Chemicals, Inc. Chemical treatment for algae control in open water systems
JPH07163988A (en) * 1994-12-09 1995-06-27 Osaka Prefecture Light shading plate for water treating equipment
JP2007068419A (en) * 2005-09-05 2007-03-22 Japan Science & Technology Agency Method for inhibiting increase of harmful algae causing red tide

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUNTER ET AL: "Spectral discrimination of phytoplankton colour groups: The effect of suspended particulate matter and sensor spectral resolution", REMOTE SENSING OF ENVIRONMENT, ELSEVIER, XX, vol. 112, no. 4, 13 March 2008 (2008-03-13), pages 1527 - 1544, XP022527054, ISSN: 0034-4257, DOI: DOI:10.1016/J.RSE.2007.08.003 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102599192A (en) * 2012-01-31 2012-07-25 清华大学深圳研究生院 Application of sodium humate in inhibiting growth of red tide algae
CN109574432A (en) * 2019-01-02 2019-04-05 上海园林绿化建设有限公司 A kind of lake water Ecosystem restoration system

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Effective date: 20210401