A multiscale approach to mapping seabed sediments
Benthic habitat maps, including maps of seabed sediments, have become critical spatialdecision support tools for marine ecological management and conservation. Despite the increasing recognition that environmental variables should be considered at multiple spatial scales, variables used in habitat m...
Published in: | PLOS ONE |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Public Library of Science
2018
|
Subjects: | |
Online Access: | https://research.library.mun.ca/13199/ https://research.library.mun.ca/13199/1/misiuk_et_al_2018.pdf https://doi.org/10.1371/journal.pone.0193647 |
id |
ftmemorialuniv:oai:research.library.mun.ca:13199 |
---|---|
record_format |
openpolar |
spelling |
ftmemorialuniv:oai:research.library.mun.ca:13199 2023-10-01T03:58:26+02:00 A multiscale approach to mapping seabed sediments Misiuk, Benjamin Lecours, Vincent Bell, Trevor J. 2018-02-28 application/pdf https://research.library.mun.ca/13199/ https://research.library.mun.ca/13199/1/misiuk_et_al_2018.pdf https://doi.org/10.1371/journal.pone.0193647 en eng Public Library of Science https://research.library.mun.ca/13199/1/misiuk_et_al_2018.pdf Misiuk, Benjamin <https://research.library.mun.ca/view/creator_az/Misiuk=3ABenjamin=3A=3A.html> and Lecours, Vincent <https://research.library.mun.ca/view/creator_az/Lecours=3AVincent=3A=3A.html> and Bell, Trevor J. <https://research.library.mun.ca/view/creator_az/Bell=3ATrevor_J=2E=3A=3A.html> (2018) A multiscale approach to mapping seabed sediments. PLoS ONE, 13 (2). ISSN 1932-6203 cc_by_nc Article PeerReviewed 2018 ftmemorialuniv https://doi.org/10.1371/journal.pone.0193647 2023-09-03T06:49:08Z Benthic habitat maps, including maps of seabed sediments, have become critical spatialdecision support tools for marine ecological management and conservation. Despite the increasing recognition that environmental variables should be considered at multiple spatial scales, variables used in habitat mapping are often implemented at a single scale. The objective of this study was to evaluate the potential for using environmental variables at multiple scales for modelling and mapping seabed sediments. Sixteen environmental variables were derived from multibeam echosounder data collected near Qikiqtarjuaq, Nunavut, Canada at eight spatial scales ranging from 5 to 275 m, and were tested as predictor variables for modelling seabed sediment distributions. Using grain size data obtained from grab samples, we tested which scales of each predictor variable contributed most to sediment models. Results showed that the default scale was often not the best. Out of 129 potential scale dependent variables, 11 were selected to model the additive log-ratio of mud and sand at five different scales, and 15 were selected to model the additive log-ratio of gravel and sand, also at five different scales. Boosted Regression Tree models that explained between 46.4 and 56.3% of statistical deviance produced multiscale predictions of mud, sand, and gravel that were correlated with cross-validated test data (Spearman's ρmud = 0.77, ρsand = 0.71, ρgravel = 0.58). Predictions of individual size fractions were classified to produce a map of seabed sediments that is useful for marine spatial planning. Based on the scale-dependence of variables in this study, we concluded that spatial scale consideration is at least as important as variable selection in seabed mapping. Article in Journal/Newspaper Nunavut Qikiqtarjuaq Memorial University of Newfoundland: Research Repository Nunavut Canada Qikiqtarjuaq ENVELOPE(-64.029,-64.029,67.557,67.557) PLOS ONE 13 2 e0193647 |
institution |
Open Polar |
collection |
Memorial University of Newfoundland: Research Repository |
op_collection_id |
ftmemorialuniv |
language |
English |
description |
Benthic habitat maps, including maps of seabed sediments, have become critical spatialdecision support tools for marine ecological management and conservation. Despite the increasing recognition that environmental variables should be considered at multiple spatial scales, variables used in habitat mapping are often implemented at a single scale. The objective of this study was to evaluate the potential for using environmental variables at multiple scales for modelling and mapping seabed sediments. Sixteen environmental variables were derived from multibeam echosounder data collected near Qikiqtarjuaq, Nunavut, Canada at eight spatial scales ranging from 5 to 275 m, and were tested as predictor variables for modelling seabed sediment distributions. Using grain size data obtained from grab samples, we tested which scales of each predictor variable contributed most to sediment models. Results showed that the default scale was often not the best. Out of 129 potential scale dependent variables, 11 were selected to model the additive log-ratio of mud and sand at five different scales, and 15 were selected to model the additive log-ratio of gravel and sand, also at five different scales. Boosted Regression Tree models that explained between 46.4 and 56.3% of statistical deviance produced multiscale predictions of mud, sand, and gravel that were correlated with cross-validated test data (Spearman's ρmud = 0.77, ρsand = 0.71, ρgravel = 0.58). Predictions of individual size fractions were classified to produce a map of seabed sediments that is useful for marine spatial planning. Based on the scale-dependence of variables in this study, we concluded that spatial scale consideration is at least as important as variable selection in seabed mapping. |
format |
Article in Journal/Newspaper |
author |
Misiuk, Benjamin Lecours, Vincent Bell, Trevor J. |
spellingShingle |
Misiuk, Benjamin Lecours, Vincent Bell, Trevor J. A multiscale approach to mapping seabed sediments |
author_facet |
Misiuk, Benjamin Lecours, Vincent Bell, Trevor J. |
author_sort |
Misiuk, Benjamin |
title |
A multiscale approach to mapping seabed sediments |
title_short |
A multiscale approach to mapping seabed sediments |
title_full |
A multiscale approach to mapping seabed sediments |
title_fullStr |
A multiscale approach to mapping seabed sediments |
title_full_unstemmed |
A multiscale approach to mapping seabed sediments |
title_sort |
multiscale approach to mapping seabed sediments |
publisher |
Public Library of Science |
publishDate |
2018 |
url |
https://research.library.mun.ca/13199/ https://research.library.mun.ca/13199/1/misiuk_et_al_2018.pdf https://doi.org/10.1371/journal.pone.0193647 |
long_lat |
ENVELOPE(-64.029,-64.029,67.557,67.557) |
geographic |
Nunavut Canada Qikiqtarjuaq |
geographic_facet |
Nunavut Canada Qikiqtarjuaq |
genre |
Nunavut Qikiqtarjuaq |
genre_facet |
Nunavut Qikiqtarjuaq |
op_relation |
https://research.library.mun.ca/13199/1/misiuk_et_al_2018.pdf Misiuk, Benjamin <https://research.library.mun.ca/view/creator_az/Misiuk=3ABenjamin=3A=3A.html> and Lecours, Vincent <https://research.library.mun.ca/view/creator_az/Lecours=3AVincent=3A=3A.html> and Bell, Trevor J. <https://research.library.mun.ca/view/creator_az/Bell=3ATrevor_J=2E=3A=3A.html> (2018) A multiscale approach to mapping seabed sediments. PLoS ONE, 13 (2). ISSN 1932-6203 |
op_rights |
cc_by_nc |
op_doi |
https://doi.org/10.1371/journal.pone.0193647 |
container_title |
PLOS ONE |
container_volume |
13 |
container_issue |
2 |
container_start_page |
e0193647 |
_version_ |
1778531183366242304 |