气候变化领域集成服务门户(CCPortal): Evidence of Phytoplankton Light Acclimation to Periodic Turbulent Mixing Along a Tidally Dominated Tropical Coastline

CCPortal

DOI	10.1029/2020JC016615
	Evidence of Phytoplankton Light Acclimation to Periodic Turbulent Mixing Along a Tidally Dominated Tropical Coastline
	McLaughlin M.J.; Greenwood J.; Branson P.; Lourey M.J.; Hanson C.E.
发表日期	2020
ISSN	21699275
卷号	125 期号:11
英文摘要	One of the largest tropical tidal ranges in the world occurs in King Sound, a semienclosed embayment in the tropical Kimberley region of Western Australia. Incubations of phytoplankton within King Sound displayed reduced photosynthetic efficiency, elevated maximum photosynthetic rates, and no measurable photoinhibition. A response typical of high light adapted phytoplankton despite decreased water clarity and low ambient nutrient concentrations in the estuary. This is in contrast with the adjacent shelf where phytoplankton, associated with a deep chlorophyll maximum, display high photosynthetic efficiency and strong light inhibition typical of low light adaptation. Remote sensing and numerical modeling suggest that spatial and temporal variations in tidal mixing drive changes in light variability and in photoacclimation. In King Sound phytoplankton experience the largest variations in light over short time scales where diatoms dominate since they can rapidly acclimate to water column light conditions by adjusting pigment within the cell. The photophysiological response of the phytoplankton in the Sound suggests that acclimation to alternate weak and strong mixing exposes them to cyclical changes in light intensity delaying the onset of photoinhibition, allowing higher maximum photosynthetic rates to be attained. These findings highlight the importance of a multifaceted approach to understanding the links between physics and photoacclimation strategies employed by phytoplankton to more accurately determine rates of depth-integrated productivity in complex coastal areas. © 2020 Commonwealth of Australia
英文关键词	Indian Ocean; mixing; oceanography; phytoplankton; tides; tropics
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186596
作者单位	CSIRO Oceans and Atmosphere, Indian Ocean Marine Research Centre, Crawley, WA, Australia; Oceans Institute, Indian Ocean Marine Research Centre, University of Western Australia, Crawley, WA, Australia; BMT Global, Osborne Park, WA, Australia; Department of Education, East Perth, WA, Australia
推荐引用方式 GB/T 7714	McLaughlin M.J.,Greenwood J.,Branson P.,et al. Evidence of Phytoplankton Light Acclimation to Periodic Turbulent Mixing Along a Tidally Dominated Tropical Coastline[J],2020,125(11).
APA	McLaughlin M.J.,Greenwood J.,Branson P.,Lourey M.J.,&Hanson C.E..(2020).Evidence of Phytoplankton Light Acclimation to Periodic Turbulent Mixing Along a Tidally Dominated Tropical Coastline.Journal of Geophysical Research: Oceans,125(11).
MLA	McLaughlin M.J.,et al."Evidence of Phytoplankton Light Acclimation to Periodic Turbulent Mixing Along a Tidally Dominated Tropical Coastline".Journal of Geophysical Research: Oceans 125.11(2020).