Vegetation and sedimentation on coastal foredunes

J.G.S. Keijsers, A.V. de Groot, M.J.P.M. Riksen

Research output: Contribution to journalArticleAcademicpeer-review

31 Citations (Scopus)

Abstract

On a timescale of years to decades, vegetated foredunes may show various modes of morphological development. Vegetation is one of the factors that determine the sedimentation pattern and thus morphology on the foredune. In turn, the vegetation pattern may be controlled by the sedimentation pattern. Although these effects have been quantified for short timescales, there is relatively little information on the interaction between vegetation and sedimentation for timescales of over a year. For the island of Ameland, the Netherlands, elevation measurements and aerial photographs between 2002 and 2012 were used to derive changes in elevation and vegetation patterns on a year-to-year basis. This was done for a range of stable to accreting foredunes. Sedimentation increases from the beach to a maximum halfway up the seaward slope of the foredune, and then decreases again when going landward. This trend is further modified by the vegetation's spatial pattern. On a timescale of years, there is no correlation between the density of vegetation cover and the amount of accretion. However, by accounting for the gradual depletion of the sand load over the foredune, a relationship can be defined between vegetation cover and its trapping efficiency. Foredune vegetation spreads mainly by lateral expansion of existing patches. No strong effect was found of the sedimentation balance on the expansion of vegetation. It is suggested that other growth-limiting factors are of similar importance, masking any possible dependency of vegetation growth on sand accretion.
Original languageEnglish
Pages (from-to)723-734
JournalGeomorphology
Volume228
DOIs
Publication statusPublished - 2015

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sedimentation
vegetation
timescale
vegetation cover
accretion
sand
aerial photograph
limiting factor
trapping
beach
effect

Keywords

  • prince-edward-island
  • sand transport
  • ammophila-breviligulata
  • dutch coast
  • air-flow
  • dunes
  • wind
  • dynamics
  • geomorphology
  • morphology

Cite this

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title = "Vegetation and sedimentation on coastal foredunes",
abstract = "On a timescale of years to decades, vegetated foredunes may show various modes of morphological development. Vegetation is one of the factors that determine the sedimentation pattern and thus morphology on the foredune. In turn, the vegetation pattern may be controlled by the sedimentation pattern. Although these effects have been quantified for short timescales, there is relatively little information on the interaction between vegetation and sedimentation for timescales of over a year. For the island of Ameland, the Netherlands, elevation measurements and aerial photographs between 2002 and 2012 were used to derive changes in elevation and vegetation patterns on a year-to-year basis. This was done for a range of stable to accreting foredunes. Sedimentation increases from the beach to a maximum halfway up the seaward slope of the foredune, and then decreases again when going landward. This trend is further modified by the vegetation's spatial pattern. On a timescale of years, there is no correlation between the density of vegetation cover and the amount of accretion. However, by accounting for the gradual depletion of the sand load over the foredune, a relationship can be defined between vegetation cover and its trapping efficiency. Foredune vegetation spreads mainly by lateral expansion of existing patches. No strong effect was found of the sedimentation balance on the expansion of vegetation. It is suggested that other growth-limiting factors are of similar importance, masking any possible dependency of vegetation growth on sand accretion.",
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author = "J.G.S. Keijsers and {de Groot}, A.V. and M.J.P.M. Riksen",
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Vegetation and sedimentation on coastal foredunes. / Keijsers, J.G.S.; de Groot, A.V.; Riksen, M.J.P.M.

In: Geomorphology, Vol. 228, 2015, p. 723-734.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Vegetation and sedimentation on coastal foredunes

AU - Keijsers, J.G.S.

AU - de Groot, A.V.

AU - Riksen, M.J.P.M.

PY - 2015

Y1 - 2015

N2 - On a timescale of years to decades, vegetated foredunes may show various modes of morphological development. Vegetation is one of the factors that determine the sedimentation pattern and thus morphology on the foredune. In turn, the vegetation pattern may be controlled by the sedimentation pattern. Although these effects have been quantified for short timescales, there is relatively little information on the interaction between vegetation and sedimentation for timescales of over a year. For the island of Ameland, the Netherlands, elevation measurements and aerial photographs between 2002 and 2012 were used to derive changes in elevation and vegetation patterns on a year-to-year basis. This was done for a range of stable to accreting foredunes. Sedimentation increases from the beach to a maximum halfway up the seaward slope of the foredune, and then decreases again when going landward. This trend is further modified by the vegetation's spatial pattern. On a timescale of years, there is no correlation between the density of vegetation cover and the amount of accretion. However, by accounting for the gradual depletion of the sand load over the foredune, a relationship can be defined between vegetation cover and its trapping efficiency. Foredune vegetation spreads mainly by lateral expansion of existing patches. No strong effect was found of the sedimentation balance on the expansion of vegetation. It is suggested that other growth-limiting factors are of similar importance, masking any possible dependency of vegetation growth on sand accretion.

AB - On a timescale of years to decades, vegetated foredunes may show various modes of morphological development. Vegetation is one of the factors that determine the sedimentation pattern and thus morphology on the foredune. In turn, the vegetation pattern may be controlled by the sedimentation pattern. Although these effects have been quantified for short timescales, there is relatively little information on the interaction between vegetation and sedimentation for timescales of over a year. For the island of Ameland, the Netherlands, elevation measurements and aerial photographs between 2002 and 2012 were used to derive changes in elevation and vegetation patterns on a year-to-year basis. This was done for a range of stable to accreting foredunes. Sedimentation increases from the beach to a maximum halfway up the seaward slope of the foredune, and then decreases again when going landward. This trend is further modified by the vegetation's spatial pattern. On a timescale of years, there is no correlation between the density of vegetation cover and the amount of accretion. However, by accounting for the gradual depletion of the sand load over the foredune, a relationship can be defined between vegetation cover and its trapping efficiency. Foredune vegetation spreads mainly by lateral expansion of existing patches. No strong effect was found of the sedimentation balance on the expansion of vegetation. It is suggested that other growth-limiting factors are of similar importance, masking any possible dependency of vegetation growth on sand accretion.

KW - prince-edward-island

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KW - wind

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KW - geomorphology

KW - morphology

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