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Tidal range and recovery from the impacts mechanical beach grooming

Griffin, Caroline; Day, Nicola; Rosenquist, Hanna; Wellenreuther, Maren LU ; Bunnefeld, Nils and Gilburn, André S. (2018) In Ocean and Coastal Management 154. p.66-71
Abstract

Mechanical grooming to remove litter and wrack from sandy beaches reduces strandline biodiversity. The impact of tidal range on recovery rates of strandline ecosystems after grooming has not been examined to date, even though tidal range is known to affect the spatial and temporal patterns of seaweed. We compared taxon richness of macroinvertebrates that occur all year round at 104 sites on two coastlines at similar latitudes in Northern Europe that have pronounced differences in tidal range. Macroinvertebrate taxon richness was positively correlated with algae depth on both groomed and ungroomed beaches but was lower on groomed beaches. This was the case even in the off season despite wrack depths returning to similar levels found on... (More)

Mechanical grooming to remove litter and wrack from sandy beaches reduces strandline biodiversity. The impact of tidal range on recovery rates of strandline ecosystems after grooming has not been examined to date, even though tidal range is known to affect the spatial and temporal patterns of seaweed. We compared taxon richness of macroinvertebrates that occur all year round at 104 sites on two coastlines at similar latitudes in Northern Europe that have pronounced differences in tidal range. Macroinvertebrate taxon richness was positively correlated with algae depth on both groomed and ungroomed beaches but was lower on groomed beaches. This was the case even in the off season despite wrack depths returning to similar levels found on ungroomed beaches. These impacts of grooming which extend into the winter offseason where found to be higher on beaches with a lower tidal range. We suggest this is likely to be because in areas with little tidal variation, irregular and unpredictable storm events are likely to be the predominant source of new wrack deposits. Our results suggest it is particularly important that management strategies to mitigate the impacts of grooming are adopted in areas with low tidal range.

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author
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Contribution to journal
publication status
published
subject
in
Ocean and Coastal Management
volume
154
pages
6 pages
publisher
Elsevier
external identifiers
  • scopus:85041452225
ISSN
0964-5691
DOI
10.1016/j.ocecoaman.2018.01.004
language
English
LU publication?
yes
id
62ee4b7c-2e45-4dc7-9366-5d5995d9c8da
date added to LUP
2018-02-20 12:17:14
date last changed
2018-05-29 09:19:32
@article{62ee4b7c-2e45-4dc7-9366-5d5995d9c8da,
  abstract     = {<p>Mechanical grooming to remove litter and wrack from sandy beaches reduces strandline biodiversity. The impact of tidal range on recovery rates of strandline ecosystems after grooming has not been examined to date, even though tidal range is known to affect the spatial and temporal patterns of seaweed. We compared taxon richness of macroinvertebrates that occur all year round at 104 sites on two coastlines at similar latitudes in Northern Europe that have pronounced differences in tidal range. Macroinvertebrate taxon richness was positively correlated with algae depth on both groomed and ungroomed beaches but was lower on groomed beaches. This was the case even in the off season despite wrack depths returning to similar levels found on ungroomed beaches. These impacts of grooming which extend into the winter offseason where found to be higher on beaches with a lower tidal range. We suggest this is likely to be because in areas with little tidal variation, irregular and unpredictable storm events are likely to be the predominant source of new wrack deposits. Our results suggest it is particularly important that management strategies to mitigate the impacts of grooming are adopted in areas with low tidal range.</p>},
  author       = {Griffin, Caroline and Day, Nicola and Rosenquist, Hanna and Wellenreuther, Maren and Bunnefeld, Nils and Gilburn, André S.},
  issn         = {0964-5691},
  language     = {eng},
  month        = {03},
  pages        = {66--71},
  publisher    = {Elsevier},
  series       = {Ocean and Coastal Management},
  title        = {Tidal range and recovery from the impacts mechanical beach grooming},
  url          = {http://dx.doi.org/10.1016/j.ocecoaman.2018.01.004},
  volume       = {154},
  year         = {2018},
}