Internal nutrient loading is a potential source of eutrophication in Shenzhen Bay, China

As a highly eutrophic area, Shenzhen Bay in southern China has accumulated plant dissolved inorganic nitrogen (DIN) and phosphate (PO43--P), resulting in various environmental problems. The nutrient loading was calculated to classify runoff patterns of the bay and provide possible management solutio...

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Autores principales:	Qi Yan, Tingting Cheng, Junting Song, Jin Zhou, Chin-Chang Hung, Zhonghua Cai
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Eutrophication Internal loading LOICZ model Nutrient budget Sediment resuspension Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/8f3f02d7a32742bb9c50a6c15b7df932
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spelling	oai:doaj.org-article:8f3f02d7a32742bb9c50a6c15b7df9322021-12-01T04:52:21ZInternal nutrient loading is a potential source of eutrophication in Shenzhen Bay, China1470-160X10.1016/j.ecolind.2021.107736https://doaj.org/article/8f3f02d7a32742bb9c50a6c15b7df9322021-08-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21004015https://doaj.org/toc/1470-160XAs a highly eutrophic area, Shenzhen Bay in southern China has accumulated plant dissolved inorganic nitrogen (DIN) and phosphate (PO43--P), resulting in various environmental problems. The nutrient loading was calculated to classify runoff patterns of the bay and provide possible management solutions. However, previous studies have shown that external loading alone cannot explain the source of nutrition in Shenzhen Bay. In our study, for the first time, we proved quantitatively that internal nutrient loading was the main contributor of the total input fluxes of dissolved DIN and PO43--P in Shenzhen Bay using the LOICZ (land–ocean interactions in the coastal zone) model. Our results showed that the internal loading supplied 65 and 69% of total input fluxes of dissolved DIN and PO43--P, which were c. 4.0 × 106 and 0.3 × 106 mol/d, respectively. The estimated nutrient input flux from terrigenous loading were c. 1.38 × 106 and 0.1 × 106 mol/d of DIN and PO43--P, respectively. Notably, the internal loading from sediment resuspension supplied c. 3.5–15.7 × 106 and 0.5–1.9 × 106 mol/d of particle nitrogen and bioavailable phosphate to Shenzhen Bay, respectively. Moreover, 51 and 62% of DIN and PO43--P were exported through water exchange and residual flows from Shenzhen Bay into the Pearl River. These results demonstrate that internal loading dynamics and nutrient losses to the Pearl River jointly influence the eutrophication process in Shenzhen Bay.Qi YanTingting ChengJunting SongJin ZhouChin-Chang HungZhonghua CaiElsevierarticleEutrophicationInternal loadingLOICZ modelNutrient budgetSediment resuspensionEcologyQH540-549.5ENEcological Indicators, Vol 127, Iss , Pp 107736- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Eutrophication Internal loading LOICZ model Nutrient budget Sediment resuspension Ecology QH540-549.5
spellingShingle	Eutrophication Internal loading LOICZ model Nutrient budget Sediment resuspension Ecology QH540-549.5 Qi Yan Tingting Cheng Junting Song Jin Zhou Chin-Chang Hung Zhonghua Cai Internal nutrient loading is a potential source of eutrophication in Shenzhen Bay, China
description	As a highly eutrophic area, Shenzhen Bay in southern China has accumulated plant dissolved inorganic nitrogen (DIN) and phosphate (PO43--P), resulting in various environmental problems. The nutrient loading was calculated to classify runoff patterns of the bay and provide possible management solutions. However, previous studies have shown that external loading alone cannot explain the source of nutrition in Shenzhen Bay. In our study, for the first time, we proved quantitatively that internal nutrient loading was the main contributor of the total input fluxes of dissolved DIN and PO43--P in Shenzhen Bay using the LOICZ (land–ocean interactions in the coastal zone) model. Our results showed that the internal loading supplied 65 and 69% of total input fluxes of dissolved DIN and PO43--P, which were c. 4.0 × 106 and 0.3 × 106 mol/d, respectively. The estimated nutrient input flux from terrigenous loading were c. 1.38 × 106 and 0.1 × 106 mol/d of DIN and PO43--P, respectively. Notably, the internal loading from sediment resuspension supplied c. 3.5–15.7 × 106 and 0.5–1.9 × 106 mol/d of particle nitrogen and bioavailable phosphate to Shenzhen Bay, respectively. Moreover, 51 and 62% of DIN and PO43--P were exported through water exchange and residual flows from Shenzhen Bay into the Pearl River. These results demonstrate that internal loading dynamics and nutrient losses to the Pearl River jointly influence the eutrophication process in Shenzhen Bay.
format	article
author	Qi Yan Tingting Cheng Junting Song Jin Zhou Chin-Chang Hung Zhonghua Cai
author_facet	Qi Yan Tingting Cheng Junting Song Jin Zhou Chin-Chang Hung Zhonghua Cai
author_sort	Qi Yan
title	Internal nutrient loading is a potential source of eutrophication in Shenzhen Bay, China
title_short	Internal nutrient loading is a potential source of eutrophication in Shenzhen Bay, China
title_full	Internal nutrient loading is a potential source of eutrophication in Shenzhen Bay, China
title_fullStr	Internal nutrient loading is a potential source of eutrophication in Shenzhen Bay, China
title_full_unstemmed	Internal nutrient loading is a potential source of eutrophication in Shenzhen Bay, China
title_sort	internal nutrient loading is a potential source of eutrophication in shenzhen bay, china
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/8f3f02d7a32742bb9c50a6c15b7df932
work_keys_str_mv	AT qiyan internalnutrientloadingisapotentialsourceofeutrophicationinshenzhenbaychina AT tingtingcheng internalnutrientloadingisapotentialsourceofeutrophicationinshenzhenbaychina AT juntingsong internalnutrientloadingisapotentialsourceofeutrophicationinshenzhenbaychina AT jinzhou internalnutrientloadingisapotentialsourceofeutrophicationinshenzhenbaychina AT chinchanghung internalnutrientloadingisapotentialsourceofeutrophicationinshenzhenbaychina AT zhonghuacai internalnutrientloadingisapotentialsourceofeutrophicationinshenzhenbaychina
_version_	1718405736077197312

Internal nutrient loading is a potential source of eutrophication in Shenzhen Bay, China

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