Numerical simulations of onshore transport of larvae and detritus to a steep pocket beach

Atsushi G. Fujimura, Ad J.H.M. Reniers, Claire B Paris-Limouzy, Alan L. Shanks, Jamie H. MacMahan, Steven G. Morgan

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Larvae of intertidal invertebrates need to cross the surf zone to settle in their adult habitat. Onshore transport of invertebrate larvae and detritus at a steep beach was simulated with a biophysical larval tracking model. Hydrodynamic model calculations were performed for 24 h after a 24 h spin-up stage with bathymetry and averaged wave data obtained during the summer of 2011 at Carmel River State Beach, California, and with and without onshore wind. The physical model output was then transferred to a Lagrangian larval tracking model using several types of particles representing larvae. A southward alongshore current controlled particle distribution in the middle and north of the domain. At the southern shore, negatively buoyant particles were trapped by eddies generated between the alongshore current and shore, while positively buoyant particles were carried onshore by wind-driven surface currents. The concentration of modeled detritus in the surf zone was positively correlated with that of negatively buoyant larvae. Additionally, the concentrations of detritus and competent larvae within the surf zone were negatively correlated with wave height, consistent with the observations of the accompanying field study. Some eddies contributed to forming high particle concentration patches by trapping them in the surf zone. More small eddies were generated closer to the shore with smaller waves, leading to high larval and detrital concentration in the surf zone. As waves increased in size, fewer and larger eddies formed, predominantly outside the surf zone, and consequently fewer larvae and detritus particles entered or stayed in the surf zone.

Original languageEnglish (US)
Pages (from-to)33-43
Number of pages11
JournalMarine Ecology Progress Series
Volume582
DOIs
StatePublished - Nov 6 2017

Fingerprint

surf zone
detritus
beaches
beach
larva
larvae
eddy
simulation
invertebrates
invertebrate
physical models
hydrodynamics
wave height
trapping
bathymetry
particle
rivers
summer
habitats
habitat

Keywords

  • Biophysical model
  • Competent larvae
  • Detritus
  • Eddies
  • Larval transport
  • Steep beach
  • Surf zone

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology

Cite this

Numerical simulations of onshore transport of larvae and detritus to a steep pocket beach. / Fujimura, Atsushi G.; Reniers, Ad J.H.M.; Paris-Limouzy, Claire B; Shanks, Alan L.; MacMahan, Jamie H.; Morgan, Steven G.

In: Marine Ecology Progress Series, Vol. 582, 06.11.2017, p. 33-43.

Research output: Contribution to journalArticle

Fujimura, Atsushi G. ; Reniers, Ad J.H.M. ; Paris-Limouzy, Claire B ; Shanks, Alan L. ; MacMahan, Jamie H. ; Morgan, Steven G. / Numerical simulations of onshore transport of larvae and detritus to a steep pocket beach. In: Marine Ecology Progress Series. 2017 ; Vol. 582. pp. 33-43.
@article{e61ab121c589407daf7b0bcd61e4b032,
title = "Numerical simulations of onshore transport of larvae and detritus to a steep pocket beach",
abstract = "Larvae of intertidal invertebrates need to cross the surf zone to settle in their adult habitat. Onshore transport of invertebrate larvae and detritus at a steep beach was simulated with a biophysical larval tracking model. Hydrodynamic model calculations were performed for 24 h after a 24 h spin-up stage with bathymetry and averaged wave data obtained during the summer of 2011 at Carmel River State Beach, California, and with and without onshore wind. The physical model output was then transferred to a Lagrangian larval tracking model using several types of particles representing larvae. A southward alongshore current controlled particle distribution in the middle and north of the domain. At the southern shore, negatively buoyant particles were trapped by eddies generated between the alongshore current and shore, while positively buoyant particles were carried onshore by wind-driven surface currents. The concentration of modeled detritus in the surf zone was positively correlated with that of negatively buoyant larvae. Additionally, the concentrations of detritus and competent larvae within the surf zone were negatively correlated with wave height, consistent with the observations of the accompanying field study. Some eddies contributed to forming high particle concentration patches by trapping them in the surf zone. More small eddies were generated closer to the shore with smaller waves, leading to high larval and detrital concentration in the surf zone. As waves increased in size, fewer and larger eddies formed, predominantly outside the surf zone, and consequently fewer larvae and detritus particles entered or stayed in the surf zone.",
keywords = "Biophysical model, Competent larvae, Detritus, Eddies, Larval transport, Steep beach, Surf zone",
author = "Fujimura, {Atsushi G.} and Reniers, {Ad J.H.M.} and Paris-Limouzy, {Claire B} and Shanks, {Alan L.} and MacMahan, {Jamie H.} and Morgan, {Steven G.}",
year = "2017",
month = "11",
day = "6",
doi = "10.3354/meps12331",
language = "English (US)",
volume = "582",
pages = "33--43",
journal = "Marine Ecology - Progress Series",
issn = "0171-8630",
publisher = "Inter-Research",

}

TY - JOUR

T1 - Numerical simulations of onshore transport of larvae and detritus to a steep pocket beach

AU - Fujimura, Atsushi G.

AU - Reniers, Ad J.H.M.

AU - Paris-Limouzy, Claire B

AU - Shanks, Alan L.

AU - MacMahan, Jamie H.

AU - Morgan, Steven G.

PY - 2017/11/6

Y1 - 2017/11/6

N2 - Larvae of intertidal invertebrates need to cross the surf zone to settle in their adult habitat. Onshore transport of invertebrate larvae and detritus at a steep beach was simulated with a biophysical larval tracking model. Hydrodynamic model calculations were performed for 24 h after a 24 h spin-up stage with bathymetry and averaged wave data obtained during the summer of 2011 at Carmel River State Beach, California, and with and without onshore wind. The physical model output was then transferred to a Lagrangian larval tracking model using several types of particles representing larvae. A southward alongshore current controlled particle distribution in the middle and north of the domain. At the southern shore, negatively buoyant particles were trapped by eddies generated between the alongshore current and shore, while positively buoyant particles were carried onshore by wind-driven surface currents. The concentration of modeled detritus in the surf zone was positively correlated with that of negatively buoyant larvae. Additionally, the concentrations of detritus and competent larvae within the surf zone were negatively correlated with wave height, consistent with the observations of the accompanying field study. Some eddies contributed to forming high particle concentration patches by trapping them in the surf zone. More small eddies were generated closer to the shore with smaller waves, leading to high larval and detrital concentration in the surf zone. As waves increased in size, fewer and larger eddies formed, predominantly outside the surf zone, and consequently fewer larvae and detritus particles entered or stayed in the surf zone.

AB - Larvae of intertidal invertebrates need to cross the surf zone to settle in their adult habitat. Onshore transport of invertebrate larvae and detritus at a steep beach was simulated with a biophysical larval tracking model. Hydrodynamic model calculations were performed for 24 h after a 24 h spin-up stage with bathymetry and averaged wave data obtained during the summer of 2011 at Carmel River State Beach, California, and with and without onshore wind. The physical model output was then transferred to a Lagrangian larval tracking model using several types of particles representing larvae. A southward alongshore current controlled particle distribution in the middle and north of the domain. At the southern shore, negatively buoyant particles were trapped by eddies generated between the alongshore current and shore, while positively buoyant particles were carried onshore by wind-driven surface currents. The concentration of modeled detritus in the surf zone was positively correlated with that of negatively buoyant larvae. Additionally, the concentrations of detritus and competent larvae within the surf zone were negatively correlated with wave height, consistent with the observations of the accompanying field study. Some eddies contributed to forming high particle concentration patches by trapping them in the surf zone. More small eddies were generated closer to the shore with smaller waves, leading to high larval and detrital concentration in the surf zone. As waves increased in size, fewer and larger eddies formed, predominantly outside the surf zone, and consequently fewer larvae and detritus particles entered or stayed in the surf zone.

KW - Biophysical model

KW - Competent larvae

KW - Detritus

KW - Eddies

KW - Larval transport

KW - Steep beach

KW - Surf zone

UR - http://www.scopus.com/inward/record.url?scp=85033225354&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85033225354&partnerID=8YFLogxK

U2 - 10.3354/meps12331

DO - 10.3354/meps12331

M3 - Article

AN - SCOPUS:85033225354

VL - 582

SP - 33

EP - 43

JO - Marine Ecology - Progress Series

JF - Marine Ecology - Progress Series

SN - 0171-8630

ER -