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Conference Paper: Human-induced marine ecological degradation: micropaleontological perspectives

TitleHuman-induced marine ecological degradation: micropaleontological perspectives
Authors
KeywordsSciences: comprehensive works
Issue Date2013
PublisherSocieta Siciliana di Scienze Naturali.
Citation
The 17th International Symposium on Ostracoda (ISO 17), Roma, Italy, 23-26 July 2013. In Il Naturalista Siciliano, 2013, v. 37 n. 1, p. 449-450 How to Cite?
AbstractWe analyzed published downcore microfossil (including ostracods, foraminifera, diatoms, dinoflagellates, and coccolithophores) records from 150 studies and reinterpreted them from an ecological degradation perspective to address the following critical but still imperfectly answered questions: (1) How is the timing of human-induced degradation of marine ecosystems different among regions? (2) What are the dominant causes of humaninduced marine ecological degradation? (3) How can we better document natural variability and thereby avoid the problem of shifting baselines of comparison as degradation progresses over time? The results indicated that: (1) ecological degradation in marine systems began significantly earlier in Europe and North America (1800s) compared with Asia (post-1900) due to earlier industrialization in European and North American countries, (2) ecological degradation accelerated globally in the late 20th century due to post-World War II economic growth, (3) recovery from the degraded state in late 20th century following various restoration efforts and environmental regulations occurred only in limited localities. Although complex in detail, typical signs of ecological degradation were diversity decline, dramatic changes in total abundance, decrease in benthic and/or sensitive species, and increase in planktic, resistant, toxic, and/or introduced species. The predominant cause of degradation detected in these microfossil records was nutrient enrichment and the resulting symptoms of eutrophication, including hypoxia. Other causes also played considerable roles in some areas, including severe metal pollution around mining sites, water acidification by acidic wastewater, and salinity changes from construction of causeways, dikes, and channels, deforestation, and land clearance. Microfossils enable reconstruction of the ecological history of the past 102–103 years or even more, and, in conjunction with statistical modeling approaches using independent proxy records of climate and human-induced environmental changes, future research will enable workers to better address Shifting Baseline Syndrome and separate anthropogenic impacts from background natural variability.
DescriptionConference Theme: Back to the Future
Scientific Session - Ostracoda as proxies for environmental monitoring and palaeoenvironmental reconstruction
Persistent Identifierhttp://hdl.handle.net/10722/188000
ISSN

 

DC FieldValueLanguage
dc.contributor.authorYasuhara, Men_US
dc.contributor.authorHunt, Gen_US
dc.contributor.authorTsujimoto, Aen_US
dc.contributor.authorKota, Ken_US
dc.date.accessioned2013-08-21T07:24:44Z-
dc.date.available2013-08-21T07:24:44Z-
dc.date.issued2013en_US
dc.identifier.citationThe 17th International Symposium on Ostracoda (ISO 17), Roma, Italy, 23-26 July 2013. In Il Naturalista Siciliano, 2013, v. 37 n. 1, p. 449-450en_US
dc.identifier.issn0394-0063-
dc.identifier.urihttp://hdl.handle.net/10722/188000-
dc.descriptionConference Theme: Back to the Future-
dc.descriptionScientific Session - Ostracoda as proxies for environmental monitoring and palaeoenvironmental reconstruction-
dc.description.abstractWe analyzed published downcore microfossil (including ostracods, foraminifera, diatoms, dinoflagellates, and coccolithophores) records from 150 studies and reinterpreted them from an ecological degradation perspective to address the following critical but still imperfectly answered questions: (1) How is the timing of human-induced degradation of marine ecosystems different among regions? (2) What are the dominant causes of humaninduced marine ecological degradation? (3) How can we better document natural variability and thereby avoid the problem of shifting baselines of comparison as degradation progresses over time? The results indicated that: (1) ecological degradation in marine systems began significantly earlier in Europe and North America (1800s) compared with Asia (post-1900) due to earlier industrialization in European and North American countries, (2) ecological degradation accelerated globally in the late 20th century due to post-World War II economic growth, (3) recovery from the degraded state in late 20th century following various restoration efforts and environmental regulations occurred only in limited localities. Although complex in detail, typical signs of ecological degradation were diversity decline, dramatic changes in total abundance, decrease in benthic and/or sensitive species, and increase in planktic, resistant, toxic, and/or introduced species. The predominant cause of degradation detected in these microfossil records was nutrient enrichment and the resulting symptoms of eutrophication, including hypoxia. Other causes also played considerable roles in some areas, including severe metal pollution around mining sites, water acidification by acidic wastewater, and salinity changes from construction of causeways, dikes, and channels, deforestation, and land clearance. Microfossils enable reconstruction of the ecological history of the past 102–103 years or even more, and, in conjunction with statistical modeling approaches using independent proxy records of climate and human-induced environmental changes, future research will enable workers to better address Shifting Baseline Syndrome and separate anthropogenic impacts from background natural variability.-
dc.languageengen_US
dc.publisherSocieta Siciliana di Scienze Naturali.-
dc.relation.ispartofIl Naturalista Sicilianoen_US
dc.subjectSciences: comprehensive works-
dc.titleHuman-induced marine ecological degradation: micropaleontological perspectivesen_US
dc.typeConference_Paperen_US
dc.identifier.emailYasuhara, M: yasuhara@hku.hken_US
dc.identifier.authorityYasuhara, M=rp01474en_US
dc.description.naturelink_to_OA_fulltext-
dc.identifier.hkuros219428en_US
dc.identifier.volume37-
dc.identifier.issue1-
dc.identifier.spage449-
dc.identifier.epage450-
dc.publisher.placeItaly-

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