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Modeling the temporal dynamics of intertidal benthic infauna biomass with environmental factors: Impact assessment of land reclamation
Yang, Y; Chui, TFM; Shen, PP; Yang, Y; Gu, JD; maychui@hku.hk
2018
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
Volume618Pages:439-450
AbstractAnthropogenic activities such as land reclamation are threatening tidal marshes worldwide. This study's hypothesis is that land reclamation in a semi-enclosed bay alters the seasonal dynamics of intertidal benthic infauna, which is a key component in the tidal marsh ecosystem. Mai Po Tidal Marsh, Deep Bay, Pearl River Estuary, China was used as a case study to evaluate the hypothesis. Ecological models that simulate benthic biomass dynamics with governing environmental factors were developed, and various scenario experiments were conducted to evaluate the impact of reclamations. Environmental variables, selected from the areas of hydrodynamics, meteorology, and water quality based on correlation analysis, were used to generate Bayesian regression models for biomass prediction. The best-performing model, which considered average water age (i.e., a hydrodynamic indicator of estuarine circulation) in the previous month, salinity variation (i.e., standard deviation of salinity), and the total sunny period in the current month, captured well both seasonal and yearly trends in the benthic infauna observations from 2002 to 2008. This model was then used to simulate biomass dynamics with varying inputs of water age and salinity variation from coastal numerical models of different reclamation scenarios. The simulation results suggest that the reclamation in 2007 decreased the spatial and annual average benthic infauna biomass in the tidal marsh by 20%, which agreed with the 28% biomass decrease recorded by field survey. The range of biomass seasonal variation also decreased significantly from 2.1 to 230.5 g/m(2) (without any reclamation) to 1.2 to 131.1 g/m(2) (after the 2007 reclamation), which further demonstrates the substantial ecological impact of reclamation. The ecological model developed in this study could simulate seasonal biomass dynamics and evaluate the ecological impact of reclamation projects. It can therefore be applied to evaluate the ecological impact of coastal engineering projects for tidal marsh management, conservation, and restoration. (c) 2017 Elsevier B.V. All rights reserved.
Department[Yang, Ye; Chui, Ting Fong May; Yang, Yang] Univ Hong Kong, Dept Civil Engn, Room 6-18A,Haking Wong Bldg, Pokfulam, Hong Kong, Peoples R China; [Shen, Ping Ping] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marine Bioresources & Ecol, Guangzhou, Guangdong, Peoples R China; [Gu, Ji Dong] Univ Hong Kong, Sch Biol Sci, Lab Environm Toxicol, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China
Subject AreaEnvironmental Sciences & Ecology
WOS KeywordLand reclamation ; Benthic infauna ; Water age ; Bayesian regression model ; Pearl River Estuary
Funding ProjectLMB
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/16983
Collection中科院海洋生物资源可持续利用重点实验室
Corresponding Authormaychui@hku.hk
Recommended Citation
GB/T 7714		 Yang, Y,Chui, TFM,Shen, PP,et al. Modeling the temporal dynamics of intertidal benthic infauna biomass with environmental factors: Impact assessment of land reclamation[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,618:439-450.
APA Yang, Y,Chui, TFM,Shen, PP,Yang, Y,Gu, JD,&maychui@hku.hk.(2018).Modeling the temporal dynamics of intertidal benthic infauna biomass with environmental factors: Impact assessment of land reclamation.SCIENCE OF THE TOTAL ENVIRONMENT,618,439-450.
MLA Yang, Y,et al."Modeling the temporal dynamics of intertidal benthic infauna biomass with environmental factors: Impact assessment of land reclamation".SCIENCE OF THE TOTAL ENVIRONMENT 618(2018):439-450.
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