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Mechanisms of cross-shore transport and spatial variability of phytoplankton on a rip-channeled beach. / Fujimura, Atsushi G.; Reniers, Ad J.H.M.; Paris, Claire B.; Shanks, Alan L.; MacMahan, Jamie H.; Morgan, Steven G.

In: Frontiers in Marine Science, Vol. 5, No. JUN, 183, 13.06.2018.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Fujimura, AG, Reniers, AJHM, Paris, CB, Shanks, AL, MacMahan, JH & Morgan, SG 2018, 'Mechanisms of cross-shore transport and spatial variability of phytoplankton on a rip-channeled beach' Frontiers in Marine Science, vol. 5, no. JUN, 183. https://doi.org/10.3389/fmars.2018.00183

APA

Fujimura, A. G., Reniers, A. J. H. M., Paris, C. B., Shanks, A. L., MacMahan, J. H., & Morgan, S. G. (2018). Mechanisms of cross-shore transport and spatial variability of phytoplankton on a rip-channeled beach. Frontiers in Marine Science, 5(JUN), [183]. https://doi.org/10.3389/fmars.2018.00183

Vancouver

Fujimura AG, Reniers AJHM, Paris CB, Shanks AL, MacMahan JH, Morgan SG. Mechanisms of cross-shore transport and spatial variability of phytoplankton on a rip-channeled beach. Frontiers in Marine Science. 2018 Jun 13;5(JUN). 183. https://doi.org/10.3389/fmars.2018.00183

Author

Fujimura, Atsushi G. ; Reniers, Ad J.H.M. ; Paris, Claire B. ; Shanks, Alan L. ; MacMahan, Jamie H. ; Morgan, Steven G. / Mechanisms of cross-shore transport and spatial variability of phytoplankton on a rip-channeled beach. In: Frontiers in Marine Science. 2018 ; Vol. 5, No. JUN.

BibTeX

@article{33c358c2e9c74661a5c62840fd9e1c14,
title = "Mechanisms of cross-shore transport and spatial variability of phytoplankton on a rip-channeled beach",
abstract = "We investigated whether cross-shore distributions of coastal phytoplankton to the surf zone are controlled by hydrodynamics and their biological characteristics. Data from a rip-channeled beach indicate that concentrations of phytoplankton are higher in the surf zone than offshore. To examine how phytoplankton is transported toward the shore, we used a coupled biophysical model, comprised of a 3D physical model of coastal dynamics and an individual-based model (IBM) for tracking phytoplankton on the rip-channeled beach. Waves and wind in the biophysical model were parameterized by the conditions during the sampling period. Previous studies indicated that growth rates of phytoplankton can be enhanced by high turbulence, which might contribute to high phytoplankton concentration in the surf zone. Some numerical and laboratory works showed that turbulence can also increase the downward velocity of phytoplankton, which could be carried by onshore bottom currents and remain in the surf zone. Furthermore, we adapted the IBM with the theoretical model of diurnal vertical migration (DVM) for phytoplankton. The theoretical DVM works as follows: in the morning, phytoplankton cells adhere to air bubbles and stay at the surface and close to the shore in the daytime because onshore wind and surface current direction is usually onshore; in the late afternoon, the cells switch their attachment from air bubbles to sand grains and sink to the bottom where the water flow is normally onshore at night. Finally, depth-varying growth of phytoplankton was also incorporated into the DVM module. Simulations using neutral passive particles do not give the expected results of observed patterns. All tested mechanisms, i.e., wind- and wave-driven currents, rip-current circulation, turbulence-driven growth and sinking, DVM, and depth-varying growth, enhanced onshore phytoplankton migration and cell concentrations in the surf zone, indicating that both biological traits and physical factors can be essential to phytoplankton cross-shore transport and spatial variability. Our model is open to be modified and re-parameterized, followed by further analysis and validation, so that it can be more adequate for ecological assessment of coastal areas.",
keywords = "Cell growth, Cross-shore transport, Phytoplankton, Rip current, Surf zone, Turbulence, Vertical migration",
author = "Fujimura, {Atsushi G.} and Reniers, {Ad J.H.M.} and Paris, {Claire B.} and Shanks, {Alan L.} and MacMahan, {Jamie H.} and Morgan, {Steven G.}",
year = "2018",
month = "6",
day = "13",
doi = "10.3389/fmars.2018.00183",
language = "English",
volume = "5",
journal = "Frontiers in Marine Science",
issn = "2296-7745",
publisher = "Frontiers Media",
number = "JUN",

}

RIS

TY - JOUR

T1 - Mechanisms of cross-shore transport and spatial variability of phytoplankton on a rip-channeled beach

AU - Fujimura, Atsushi G.

AU - Reniers, Ad J.H.M.

AU - Paris, Claire B.

AU - Shanks, Alan L.

AU - MacMahan, Jamie H.

AU - Morgan, Steven G.

PY - 2018/6/13

Y1 - 2018/6/13

N2 - We investigated whether cross-shore distributions of coastal phytoplankton to the surf zone are controlled by hydrodynamics and their biological characteristics. Data from a rip-channeled beach indicate that concentrations of phytoplankton are higher in the surf zone than offshore. To examine how phytoplankton is transported toward the shore, we used a coupled biophysical model, comprised of a 3D physical model of coastal dynamics and an individual-based model (IBM) for tracking phytoplankton on the rip-channeled beach. Waves and wind in the biophysical model were parameterized by the conditions during the sampling period. Previous studies indicated that growth rates of phytoplankton can be enhanced by high turbulence, which might contribute to high phytoplankton concentration in the surf zone. Some numerical and laboratory works showed that turbulence can also increase the downward velocity of phytoplankton, which could be carried by onshore bottom currents and remain in the surf zone. Furthermore, we adapted the IBM with the theoretical model of diurnal vertical migration (DVM) for phytoplankton. The theoretical DVM works as follows: in the morning, phytoplankton cells adhere to air bubbles and stay at the surface and close to the shore in the daytime because onshore wind and surface current direction is usually onshore; in the late afternoon, the cells switch their attachment from air bubbles to sand grains and sink to the bottom where the water flow is normally onshore at night. Finally, depth-varying growth of phytoplankton was also incorporated into the DVM module. Simulations using neutral passive particles do not give the expected results of observed patterns. All tested mechanisms, i.e., wind- and wave-driven currents, rip-current circulation, turbulence-driven growth and sinking, DVM, and depth-varying growth, enhanced onshore phytoplankton migration and cell concentrations in the surf zone, indicating that both biological traits and physical factors can be essential to phytoplankton cross-shore transport and spatial variability. Our model is open to be modified and re-parameterized, followed by further analysis and validation, so that it can be more adequate for ecological assessment of coastal areas.

AB - We investigated whether cross-shore distributions of coastal phytoplankton to the surf zone are controlled by hydrodynamics and their biological characteristics. Data from a rip-channeled beach indicate that concentrations of phytoplankton are higher in the surf zone than offshore. To examine how phytoplankton is transported toward the shore, we used a coupled biophysical model, comprised of a 3D physical model of coastal dynamics and an individual-based model (IBM) for tracking phytoplankton on the rip-channeled beach. Waves and wind in the biophysical model were parameterized by the conditions during the sampling period. Previous studies indicated that growth rates of phytoplankton can be enhanced by high turbulence, which might contribute to high phytoplankton concentration in the surf zone. Some numerical and laboratory works showed that turbulence can also increase the downward velocity of phytoplankton, which could be carried by onshore bottom currents and remain in the surf zone. Furthermore, we adapted the IBM with the theoretical model of diurnal vertical migration (DVM) for phytoplankton. The theoretical DVM works as follows: in the morning, phytoplankton cells adhere to air bubbles and stay at the surface and close to the shore in the daytime because onshore wind and surface current direction is usually onshore; in the late afternoon, the cells switch their attachment from air bubbles to sand grains and sink to the bottom where the water flow is normally onshore at night. Finally, depth-varying growth of phytoplankton was also incorporated into the DVM module. Simulations using neutral passive particles do not give the expected results of observed patterns. All tested mechanisms, i.e., wind- and wave-driven currents, rip-current circulation, turbulence-driven growth and sinking, DVM, and depth-varying growth, enhanced onshore phytoplankton migration and cell concentrations in the surf zone, indicating that both biological traits and physical factors can be essential to phytoplankton cross-shore transport and spatial variability. Our model is open to be modified and re-parameterized, followed by further analysis and validation, so that it can be more adequate for ecological assessment of coastal areas.

KW - Cell growth

KW - Cross-shore transport

KW - Phytoplankton

KW - Rip current

KW - Surf zone

KW - Turbulence

KW - Vertical migration

UR - http://www.scopus.com/inward/record.url?scp=85047242862&partnerID=8YFLogxK

UR - http://resolver.tudelft.nl/uuid:33c358c2-e9c7-4661-a5c6-2840fd9e1c14

U2 - 10.3389/fmars.2018.00183

DO - 10.3389/fmars.2018.00183

M3 - Article

VL - 5

JO - Frontiers in Marine Science

T2 - Frontiers in Marine Science

JF - Frontiers in Marine Science

SN - 2296-7745

IS - JUN

M1 - 183

ER -

ID: 45587604