globalchange  > 气候变化与战略
DOI: 10.1002/lno.11303
论文题名:
Water motion and vegetation control the pH dynamics in seagrass-dominated bays
作者: James R.K.; van Katwijk M.M.; van Tussenbroek B.I.; van der Heide T.; Dijkstra H.A.; van Westen R.M.; Pietrzak J.D.; Candy A.S.; Klees R.; Riva R.E.M.; Slobbe C.D.; Katsman C.A.; Herman P.M.J.; Bouma T.J.
刊名: Limnology and Oceanography
ISSN: 19395590
出版年: 2020
卷: 65, 期:2
语种: 英语
Scopus关键词: coastal zone ; hydrodynamics ; metabolism ; open ocean ; pH ; photosynthesis ; residence time ; respiration ; seagrass ; seawater ; shallow water ; spatial variation ; vegetation dynamics
英文摘要: Global oceanic pH is lowering, which is causing great concern for the natural functioning of marine ecosystems. Current pH predictions are based on open ocean models; however, coastal zones are dynamic systems with seawater pH fluctuating temporally and spatially. To understand how coastal ecosystems will respond in the future, we first need to quantify the extent that local processes influence the pH of coastal zones. With this study, we show that over a single diurnal cycle, the total pH can fluctuate up to 0.2 units in a shallow seagrass-dominated bay, driven by the photosynthesis and respiration of the vegetation. However, these biologically controlled pH fluctuations vary significantly over small distances. Monitoring conducted at neighboring sites with contrasting hydrodynamic regimes highlights how water motion controls the extent that the local pH is altered by the metabolism of vegetation. The interactive effects of hydrodynamics and vegetation were further investigated with an in situ experiment, where the hydrodynamics were constrained and thus the local water residence time was increased, displaying the counteractive effect of hydrodynamics on the pH change caused by vegetation. With this research, we provide detailed in situ evidence of the spatial variation of pH within marine ecosystems, highlighting the need to include hydrodynamic conditions when assessing the pH-effects of vegetation, and identifying potential high-pH refuges in a future low pH ocean. © 2019 The Authors. Limnology and Oceanography published by Wiley Periodicals, Inc. on behalf of Association for the Sciences of Limnology and Oceanography.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159929
Appears in Collections:气候变化与战略

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作者单位: Department of Estuarine and Delta Systems, NIOZ Royal Netherlands Institute for Sea Research and Utrecht University, Yerseke, Netherlands; Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, Netherlands; Department of Environmental Science, Institute for Water and Wetland Research, Faculty of Science, Radboud University Nijmegen, Nijmegen, Netherlands; Unidad Académica de Sistemas Arrecifales-Puerto Morelos, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Puerto Morelos, Quintana Roo, Mexico; Department of Coastal Systems, NIOZ Royal Netherlands Institute for Sea Research and Utrecht University, Texel, Netherlands; Institute for Marine and Atmospheric Research Utrecht, Department of Physics, Utrecht University, Utrecht, Netherlands; Department of Hydraulic Engineering, Delft University of Technology, Delft, Netherlands; Department of Geoscience and Remote Sensing, Delft University of Technology, Delft, Netherlands; Faculty of Geosciences, Department of Physical Geography, Utrecht University, Utrecht, Netherlands

Recommended Citation:
James R.K.,van Katwijk M.M.,van Tussenbroek B.I.,et al. Water motion and vegetation control the pH dynamics in seagrass-dominated bays[J]. Limnology and Oceanography,2020-01-01,65(2)
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