Multi-beam backscatter measurements used to infer seabed habits
Backscatter from multi-beam sonar (MBS) was used to discriminate ecologically relevant seabed characteristics based on 62 reference sites sampled with georeferenced video, sediment grab and rock dredge between 50 and 500 m water depth. A simple biotope characteristic of soft (unconsolidated) and har...
| Main Authors: | , , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier Ltd
2010
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/38519 |
| _version_ | 1848755342373027840 |
|---|---|
| author | Kloser, R. Penrose, John Butler, A. |
| author_facet | Kloser, R. Penrose, John Butler, A. |
| author_sort | Kloser, R. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Backscatter from multi-beam sonar (MBS) was used to discriminate ecologically relevant seabed characteristics based on 62 reference sites sampled with georeferenced video, sediment grab and rock dredge between 50 and 500 m water depth. A simple biotope characteristic of soft (unconsolidated) and hard (consolidated) was used to compare the acoustic backscatter data with the data on mega-epifauna and substrate type obtained from video and physical sampling. Substrate type of homogeneous reference sites was predicted by matching the backscatter incidence angle profile (0–70°) to that of a seabed scattering model. Referencing the seabed backscatter to a consistent incidence angle (40°) gave a metric with high spatial resolution (2.4–20 m), which minimised errors of range, incident angle and beam compensation. This simple metric provided a consistent approach to analyse and interpret the data and was strongly correlated with substrate type and faunal functional groups. The high resolution backscatter metric was a closer match to the small spatial scale of seabed patch lengths observed by video (50% <50 m). |
| first_indexed | 2025-11-14T08:54:47Z |
| format | Journal Article |
| id | curtin-20.500.11937-38519 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:54:47Z |
| publishDate | 2010 |
| publisher | Elsevier Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-385192017-09-13T14:18:22Z Multi-beam backscatter measurements used to infer seabed habits Kloser, R. Penrose, John Butler, A. multi-beam Australia biotopes video backscatter epifauna Backscatter from multi-beam sonar (MBS) was used to discriminate ecologically relevant seabed characteristics based on 62 reference sites sampled with georeferenced video, sediment grab and rock dredge between 50 and 500 m water depth. A simple biotope characteristic of soft (unconsolidated) and hard (consolidated) was used to compare the acoustic backscatter data with the data on mega-epifauna and substrate type obtained from video and physical sampling. Substrate type of homogeneous reference sites was predicted by matching the backscatter incidence angle profile (0–70°) to that of a seabed scattering model. Referencing the seabed backscatter to a consistent incidence angle (40°) gave a metric with high spatial resolution (2.4–20 m), which minimised errors of range, incident angle and beam compensation. This simple metric provided a consistent approach to analyse and interpret the data and was strongly correlated with substrate type and faunal functional groups. The high resolution backscatter metric was a closer match to the small spatial scale of seabed patch lengths observed by video (50% <50 m). 2010 Journal Article http://hdl.handle.net/20.500.11937/38519 10.1016/j.csr.2010.08.004 Elsevier Ltd restricted |
| spellingShingle | multi-beam Australia biotopes video backscatter epifauna Kloser, R. Penrose, John Butler, A. Multi-beam backscatter measurements used to infer seabed habits |
| title | Multi-beam backscatter measurements used to infer seabed habits |
| title_full | Multi-beam backscatter measurements used to infer seabed habits |
| title_fullStr | Multi-beam backscatter measurements used to infer seabed habits |
| title_full_unstemmed | Multi-beam backscatter measurements used to infer seabed habits |
| title_short | Multi-beam backscatter measurements used to infer seabed habits |
| title_sort | multi-beam backscatter measurements used to infer seabed habits |
| topic | multi-beam Australia biotopes video backscatter epifauna |
| url | http://hdl.handle.net/20.500.11937/38519 |