Deposition gradients across mangrove fringes

Erik Martijn Horstman, Julia C. Mullarney, K.R. Bryan, Dean R. Sandwell

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Abstract

Observations in a mangrove in the Whangapoua Harbour, New Zealand, have shown that deposition rates are greatest in the fringing zone between the tidal flats and the mangrove forest, where the vegetation is dominated by a cover of pneumatophores (i.e. pencil roots). Current speeds and suspended sediment concentrations dropped substantially across this zone. Near-bed turbulence within the fringe was substantially lower where the pneumatophore canopy was denser, facilitating the enhanced deposition in this zone. However, the near-bed conditions were not the primary control on the instantaneous sediment concentrations at this site. The total deposition across the different zones was the combined result of the reduced near-bed turbulence inside the vegetation and the larger-scale dynamics over the spatially variable vegetation cover, along with other confounding factors such as changing sediment inputs.
Original languageEnglish
Title of host publicationProceedings of Coastal Dynamics 2017
EditorsTroels Aagaard, Rolf Deigaard, David Fuhrman
Place of PublicationHelsingør, Denmark
Pages911-922
Publication statusPublished - 2017
EventCoastal Dynamics 2017 - Kulturværftet, Helsingør, Denmark
Duration: 12 Jun 201716 Jun 2017
http://coastaldynamics2017.dk/index.html

Conference

ConferenceCoastal Dynamics 2017
CountryDenmark
CityHelsingør
Period12/06/1716/06/17
Internet address

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mangrove
turbulence
vegetation
tidal flat
suspended sediment
sediment
vegetation cover
harbor
canopy

Cite this

Horstman, E. M., Mullarney, J. C., Bryan, K. R., & Sandwell, D. R. (2017). Deposition gradients across mangrove fringes. In T. Aagaard, R. Deigaard, & D. Fuhrman (Eds.), Proceedings of Coastal Dynamics 2017 (pp. 911-922). [12] Helsingør, Denmark.
Horstman, Erik Martijn ; Mullarney, Julia C. ; Bryan, K.R. ; Sandwell, Dean R. / Deposition gradients across mangrove fringes. Proceedings of Coastal Dynamics 2017. editor / Troels Aagaard ; Rolf Deigaard ; David Fuhrman. Helsingør, Denmark, 2017. pp. 911-922
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title = "Deposition gradients across mangrove fringes",
abstract = "Observations in a mangrove in the Whangapoua Harbour, New Zealand, have shown that deposition rates are greatest in the fringing zone between the tidal flats and the mangrove forest, where the vegetation is dominated by a cover of pneumatophores (i.e. pencil roots). Current speeds and suspended sediment concentrations dropped substantially across this zone. Near-bed turbulence within the fringe was substantially lower where the pneumatophore canopy was denser, facilitating the enhanced deposition in this zone. However, the near-bed conditions were not the primary control on the instantaneous sediment concentrations at this site. The total deposition across the different zones was the combined result of the reduced near-bed turbulence inside the vegetation and the larger-scale dynamics over the spatially variable vegetation cover, along with other confounding factors such as changing sediment inputs.",
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year = "2017",
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Horstman, EM, Mullarney, JC, Bryan, KR & Sandwell, DR 2017, Deposition gradients across mangrove fringes. in T Aagaard, R Deigaard & D Fuhrman (eds), Proceedings of Coastal Dynamics 2017., 12, Helsingør, Denmark, pp. 911-922, Coastal Dynamics 2017, Helsingør, Denmark, 12/06/17.

Deposition gradients across mangrove fringes. / Horstman, Erik Martijn; Mullarney, Julia C.; Bryan, K.R.; Sandwell, Dean R.

Proceedings of Coastal Dynamics 2017. ed. / Troels Aagaard; Rolf Deigaard; David Fuhrman. Helsingør, Denmark, 2017. p. 911-922 12.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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N2 - Observations in a mangrove in the Whangapoua Harbour, New Zealand, have shown that deposition rates are greatest in the fringing zone between the tidal flats and the mangrove forest, where the vegetation is dominated by a cover of pneumatophores (i.e. pencil roots). Current speeds and suspended sediment concentrations dropped substantially across this zone. Near-bed turbulence within the fringe was substantially lower where the pneumatophore canopy was denser, facilitating the enhanced deposition in this zone. However, the near-bed conditions were not the primary control on the instantaneous sediment concentrations at this site. The total deposition across the different zones was the combined result of the reduced near-bed turbulence inside the vegetation and the larger-scale dynamics over the spatially variable vegetation cover, along with other confounding factors such as changing sediment inputs.

AB - Observations in a mangrove in the Whangapoua Harbour, New Zealand, have shown that deposition rates are greatest in the fringing zone between the tidal flats and the mangrove forest, where the vegetation is dominated by a cover of pneumatophores (i.e. pencil roots). Current speeds and suspended sediment concentrations dropped substantially across this zone. Near-bed turbulence within the fringe was substantially lower where the pneumatophore canopy was denser, facilitating the enhanced deposition in this zone. However, the near-bed conditions were not the primary control on the instantaneous sediment concentrations at this site. The total deposition across the different zones was the combined result of the reduced near-bed turbulence inside the vegetation and the larger-scale dynamics over the spatially variable vegetation cover, along with other confounding factors such as changing sediment inputs.

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Horstman EM, Mullarney JC, Bryan KR, Sandwell DR. Deposition gradients across mangrove fringes. In Aagaard T, Deigaard R, Fuhrman D, editors, Proceedings of Coastal Dynamics 2017. Helsingør, Denmark. 2017. p. 911-922. 12