Progressive eutrophication behind the ...
Type de document :
Pré-publication ou Document de travail
DOI :
Titre :
Progressive eutrophication behind the world-largest super floating macroalgal blooms in the Yellow Sea
Auteur(s) :
Éditeur :
European Geosciences Union
Date de publication :
2014
Discipline(s) HAL :
Planète et Univers [physics]/Sciences de la Terre/Océanographie
Résumé en anglais : [en]
World-largest super floating macroalgal blooms of Ulva prolifera have lasted 7 years by now in every summer in the Yellow Sea, the outer part of a semi-enclosed coastal sea. Evaluation of the inter-annual variability in ...
Lire la suite >World-largest super floating macroalgal blooms of Ulva prolifera have lasted 7 years by now in every summer in the Yellow Sea, the outer part of a semi-enclosed coastal sea. Evaluation of the inter-annual variability in the trophic status is one of fundamental tasks for prediction and management of the blooms. We show the new findings of a progressive eutrophication in the large Yellow Sea basin behind the super floating macroalgal blooms. The inter-annual variability in human-induced nutrient pollution from 2001 to 2012 was assessed by a nutrient pollution index weighted by area (AWCPI-NP), and a significant increase in the trophic status was found in the macroalgal bloom (MAB) phase (2007-2012): the average AWCPI-NP was higher than that in the pre-MAB phase (2001-2006) by about 45%; meanwhile, in the Jiangsu Shoal, origin place of the drifting macroaglae, the annual in-situ nutrient concentrations increased rapidly from 2000 to 2011. Chlorophyll a concentration (Chl a), an indicator of eutrophication, increased by about 15% in the bloom region from the pre-MAB to MAB phase. This progressive eutrophication might lead to the non-linear outburst in the growth of macroalgae, i.e., green tides, in the Yellow Sea since 2007.Lire moins >
Lire la suite >World-largest super floating macroalgal blooms of Ulva prolifera have lasted 7 years by now in every summer in the Yellow Sea, the outer part of a semi-enclosed coastal sea. Evaluation of the inter-annual variability in the trophic status is one of fundamental tasks for prediction and management of the blooms. We show the new findings of a progressive eutrophication in the large Yellow Sea basin behind the super floating macroalgal blooms. The inter-annual variability in human-induced nutrient pollution from 2001 to 2012 was assessed by a nutrient pollution index weighted by area (AWCPI-NP), and a significant increase in the trophic status was found in the macroalgal bloom (MAB) phase (2007-2012): the average AWCPI-NP was higher than that in the pre-MAB phase (2001-2006) by about 45%; meanwhile, in the Jiangsu Shoal, origin place of the drifting macroaglae, the annual in-situ nutrient concentrations increased rapidly from 2000 to 2011. Chlorophyll a concentration (Chl a), an indicator of eutrophication, increased by about 15% in the bloom region from the pre-MAB to MAB phase. This progressive eutrophication might lead to the non-linear outburst in the growth of macroalgae, i.e., green tides, in the Yellow Sea since 2007.Lire moins >
Langue :
Anglais
Source :
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- http://ir.yic.ac.cn/bitstream/133337/8846/1/Progressive%20eutrophication%20behind%20the%20world-largest%20super%20floating%20macroalgal%20blooms%20in%20the%20Yellow%20Sea.pdf
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