Effect of typhoon-induced intertidal-flat erosion on dominant macrobenthic species (Meretrix meretrix),Limnology and Oceanography

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Effect of typhoon-induced intertidal-flat erosion on dominant macrobenthic species (Meretrix meretrix)
Limnology and Oceanography ( IF 3.8 ) Pub Date : 2021-10-24 , DOI: 10.1002/lno.11953
Benwei Shi _{1,

2} , Shi Lun Yang ₁ , Stijn Temmerman ₃ , Tjeerd Bouma _{4,

5} , Tom Ysebaert _{4,

5,

6} , Sikai Wang ₇ , Yingxin Zhang ₁ , Jihua Wu ₈ , Haifei Yang ₁ , Longhui Zhang ₉ , Liqin Zuo ₁₀ , Ya Ping Wang ₁

Affiliation

State Key Laboratory of Estuarine and Coastal Research East China Normal University Shanghai China
Key Laboratory of Port, Waterway & Sedimentation Engineering Ministry of Communications Nanjing Hydraulic Research Institute Nanjing China
Ecosystem Management Research Group University of Antwerp Antwerp Belgium
NIOZ Royal Netherlands Institute for Sea Research Department of Estuarine and Delta Systems and Utrecht University AC Yerseke the Netherlands
Department of Physical Geography Utrecht University Utrecht the Netherlands
Wageningen Marine Research Wageningen University & Research Yerseke The Netherlands
East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Shanghai China
Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering Institute of Biodiversity Science, Fudan University Shanghai China
School of Geography and Ocean Science Nanjing University Nanjing China
State Key Laboratory of Hydrology‐Water Resources and Hydraulic Engineering Nanjing Hydraulic Research Institute Nanjing China

Benthic animal populations inhabiting intertidal flats provide important ecosystem functions and services that may be disrupted by physical disturbances such as tropical cyclones, which are predicted to increase in frequency and intensity under future climate change. However, the spatial reach at which tropical cyclones impact macrobenthos populations in intertidal flats remains poorly understood. We examined whether a typhoon with a center that remained more than 1400 km away from the study site could trigger severe erosion of intertidal flats and adversely affect macrobenthos populations. We undertook simultaneous measurements of hydrodynamics (waves, currents), morphodynamics (erosion, accretion) and density and biomass of the macrobenthic bivalve Meretrix meretrix during the passage of this typhoon, on an intertidal flat on the Chinese coast. Our results showed that, in spite of the considerable distance from the storm center, the bed shear stress greatly exceeded the critical value for erosion, resulting in rapid erosion of approximately 10 cm and a nearly 50% reduction in both the density and the biomass of the clam species. Our findings suggest that if storms become more frequent and more intense in a future warmer climate, they may increase physical disturbances to intertidal flats and their benthic animal populations, even at great distances from storm centers.

更新日期：2021-12-07

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