Growth and survival of the invasive alga, Caulerpa taxifolia, in different salinities and temperatures : implications for coastal lake management
Identifieur interne : 009557 ( Main/Exploration ); précédent : 009556; suivant : 009558Growth and survival of the invasive alga, Caulerpa taxifolia, in different salinities and temperatures : implications for coastal lake management
Auteurs : E. J. West [Australie] ; R. J. West [Australie]Source :
- Hydrobiologia : (The Hague) [ 0018-8158 ] ; 2007.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Lac, Milieu aquatique.
English descriptors
- KwdEn :
Abstract
The alga Caulerpa taxifolia is an invasive pest species in many parts of the world and has recently become established in several estuaries in south eastern Australia. A major infestation has occurred in Lake Conjola, an intermittently open and closed coastal lagoon in southern NSW. Short term (1 week) laboratory experiments were carried out to investigate growth and survival of fragments of C. taxifolia collected from this outbreak, under a range of salinities (15-30 ppt) and water temperatures (15-30°C). Fronds, stolons and thalli of the alga all displayed similar responses. Many of the algal fragments doubled in size over the week and a maximum growth rate of 174 mm/week was recorded. Fragments showed good growth (>20 mm/week) at salinities >20 ppt and temperatures >20°C. Almost total mortality occurred at salinities lower than 20 ppt and temperatures less than 20°C. Historical records of water quality demonstrate that prior to entrance manipulation in 2001, salinities in Lake Conjola had often dropped to below 17 ppt for extended periods (up to 2 years). This suggests that management of the alga may be improved if the lake was allowed to undergo its normal cycles of opening and closing to the ocean, and that entrance manipulation may be one factor that has influenced the success of this invasive species.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Growth and survival of the invasive alga, Caulerpa taxifolia, in different salinities and temperatures : implications for coastal lake management</title><author><name sortKey="West, E J" sort="West, E J" uniqKey="West E" first="E. J." last="West">E. J. West</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute for Conservation Biology, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Wollongong, NSW 2522</wicri:noRegion></affiliation></author><author><name sortKey="West, R J" sort="West, R J" uniqKey="West R" first="R. J." last="West">R. J. West</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute for Conservation Biology, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Wollongong, NSW 2522</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">07-0170524</idno><date when="2007">2007</date><idno type="stanalyst">PASCAL 07-0170524 INIST</idno><idno type="RBID">Pascal:07-0170524</idno><idno type="wicri:Area/PascalFrancis/Corpus">003D21</idno><idno type="wicri:Area/PascalFrancis/Curation">002367</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">003867</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">003867</idno><idno type="wicri:doubleKey">0018-8158:2007:West E:growth:and:survival</idno><idno type="wicri:Area/Main/Merge">009F79</idno><idno type="wicri:Area/Main/Curation">009557</idno><idno type="wicri:Area/Main/Exploration">009557</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Growth and survival of the invasive alga, Caulerpa taxifolia, in different salinities and temperatures : implications for coastal lake management</title><author><name sortKey="West, E J" sort="West, E J" uniqKey="West E" first="E. J." last="West">E. J. West</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute for Conservation Biology, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Wollongong, NSW 2522</wicri:noRegion></affiliation></author><author><name sortKey="West, R J" sort="West, R J" uniqKey="West R" first="R. J." last="West">R. J. West</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute for Conservation Biology, University of Wollongong</s1><s2>Wollongong, NSW 2522</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Wollongong, NSW 2522</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Hydrobiologia : (The Hague)</title><title level="j" type="abbreviated">Hydrobiologia : (Hague)</title><idno type="ISSN">0018-8158</idno><imprint><date when="2007">2007</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Hydrobiologia : (The Hague)</title><title level="j" type="abbreviated">Hydrobiologia : (Hague)</title><idno type="ISSN">0018-8158</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Algae</term><term>Aquatic environment</term><term>Caulerpa taxifolia</term><term>Coastal lagoon</term><term>Growth</term><term>Hydrobiology</term><term>Lakes</term><term>Salinity</term><term>Survival</term><term>Temperature</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Croissance</term><term>Survie</term><term>Salinité</term><term>Température</term><term>Lac</term><term>Lagune</term><term>Hydrobiologie</term><term>Milieu aquatique</term><term>Algae</term><term>Caulerpa taxifolia</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Lac</term><term>Milieu aquatique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The alga Caulerpa taxifolia is an invasive pest species in many parts of the world and has recently become established in several estuaries in south eastern Australia. A major infestation has occurred in Lake Conjola, an intermittently open and closed coastal lagoon in southern NSW. Short term (1 week) laboratory experiments were carried out to investigate growth and survival of fragments of C. taxifolia collected from this outbreak, under a range of salinities (15-30 ppt) and water temperatures (15-30°C). Fronds, stolons and thalli of the alga all displayed similar responses. Many of the algal fragments doubled in size over the week and a maximum growth rate of 174 mm/week was recorded. Fragments showed good growth (>20 mm/week) at salinities >20 ppt and temperatures >20°C. Almost total mortality occurred at salinities lower than 20 ppt and temperatures less than 20°C. Historical records of water quality demonstrate that prior to entrance manipulation in 2001, salinities in Lake Conjola had often dropped to below 17 ppt for extended periods (up to 2 years). This suggests that management of the alga may be improved if the lake was allowed to undergo its normal cycles of opening and closing to the ocean, and that entrance manipulation may be one factor that has influenced the success of this invasive species.</div></front></TEI><affiliations><list><country><li>Australie</li></country></list><tree><country name="Australie"><noRegion><name sortKey="West, E J" sort="West, E J" uniqKey="West E" first="E. J." last="West">E. J. West</name></noRegion><name sortKey="West, R J" sort="West, R J" uniqKey="West R" first="R. J." last="West">R. J. West</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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