INTRASEASONAL VARIABILITY OF GUANO STAINS IN A REMOTELY SENSED PENGUIN COLONY USING UAV AND SATELLITE
Remote sensing of penguins gives a unique opportunity to observe ecosystem changes in the Antarctic and the Southern Ocean at a continent-wide scale. The extent of guano is the best proxy to the size of penguin populations but frequent cloud cover limits the number of available images. This study fo...
Published in: | ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://doi.org/10.5194/isprs-annals-IV-2-W5-111-2019 https://doaj.org/article/71c71d65c59b4ae08f7b15dbe92260b8 |
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ftdoajarticles:oai:doaj.org/article:71c71d65c59b4ae08f7b15dbe92260b8 2023-05-15T13:57:56+02:00 INTRASEASONAL VARIABILITY OF GUANO STAINS IN A REMOTELY SENSED PENGUIN COLONY USING UAV AND SATELLITE M. Firla O. Mustafa C. Pfeifer M. Senf S. Hese 2019-05-01T00:00:00Z https://doi.org/10.5194/isprs-annals-IV-2-W5-111-2019 https://doaj.org/article/71c71d65c59b4ae08f7b15dbe92260b8 EN eng Copernicus Publications https://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/IV-2-W5/111/2019/isprs-annals-IV-2-W5-111-2019.pdf https://doaj.org/toc/2194-9042 https://doaj.org/toc/2194-9050 doi:10.5194/isprs-annals-IV-2-W5-111-2019 2194-9042 2194-9050 https://doaj.org/article/71c71d65c59b4ae08f7b15dbe92260b8 ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol IV-2-W5, Pp 111-118 (2019) Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 article 2019 ftdoajarticles https://doi.org/10.5194/isprs-annals-IV-2-W5-111-2019 2022-12-30T23:37:02Z Remote sensing of penguins gives a unique opportunity to observe ecosystem changes in the Antarctic and the Southern Ocean at a continent-wide scale. The extent of guano is the best proxy to the size of penguin populations but frequent cloud cover limits the number of available images. This study focuses on the correlation between guano coverage visible in aerial and satellite images and breeding pair numbers in the course of the breeding seasons 2016/17 and 2017/18 in a colony of Pygocelid penguins on Ardley Island (South Shetland Islands, Antarctica). Multitemporal UAV (Unmanned Aerial Vehicle) orthomosaics and high-resolution satellite images were collected of Ardley Island as well as data on breeding phenology, weather conditions and snow coverage. “Fresh” guano stains were classified using different methods of Geographical Object-based Image Analysis (GEOBIA) and differentiated from weathered guano stains. Analysis of this data shows that guano stains in an Antarctic Pygoscelid penguin colony undergo significant intraseasonal changes in extent, texture and spectral signature. Hence, the timing of image acquisition and the advance of snow melt during Antarctic spring matter when determining penguin populations and should be considered during the analysis. Our results show changes of up to 25 % of the total guano covered surface due to individual weather events and changes up to 80 % in the time between the peak of egg laying and the occurrence of the first crèche. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ardley Island South Shetland Islands Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic South Shetland Islands Guano ENVELOPE(141.604,141.604,-66.775,-66.775) Ardley ENVELOPE(-58.953,-58.953,-62.201,-62.201) Ardley Island ENVELOPE(-58.933,-58.933,-62.213,-62.213) ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences IV-2/W5 111 118 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 |
spellingShingle |
Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 M. Firla O. Mustafa C. Pfeifer M. Senf S. Hese INTRASEASONAL VARIABILITY OF GUANO STAINS IN A REMOTELY SENSED PENGUIN COLONY USING UAV AND SATELLITE |
topic_facet |
Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 |
description |
Remote sensing of penguins gives a unique opportunity to observe ecosystem changes in the Antarctic and the Southern Ocean at a continent-wide scale. The extent of guano is the best proxy to the size of penguin populations but frequent cloud cover limits the number of available images. This study focuses on the correlation between guano coverage visible in aerial and satellite images and breeding pair numbers in the course of the breeding seasons 2016/17 and 2017/18 in a colony of Pygocelid penguins on Ardley Island (South Shetland Islands, Antarctica). Multitemporal UAV (Unmanned Aerial Vehicle) orthomosaics and high-resolution satellite images were collected of Ardley Island as well as data on breeding phenology, weather conditions and snow coverage. “Fresh” guano stains were classified using different methods of Geographical Object-based Image Analysis (GEOBIA) and differentiated from weathered guano stains. Analysis of this data shows that guano stains in an Antarctic Pygoscelid penguin colony undergo significant intraseasonal changes in extent, texture and spectral signature. Hence, the timing of image acquisition and the advance of snow melt during Antarctic spring matter when determining penguin populations and should be considered during the analysis. Our results show changes of up to 25 % of the total guano covered surface due to individual weather events and changes up to 80 % in the time between the peak of egg laying and the occurrence of the first crèche. |
format |
Article in Journal/Newspaper |
author |
M. Firla O. Mustafa C. Pfeifer M. Senf S. Hese |
author_facet |
M. Firla O. Mustafa C. Pfeifer M. Senf S. Hese |
author_sort |
M. Firla |
title |
INTRASEASONAL VARIABILITY OF GUANO STAINS IN A REMOTELY SENSED PENGUIN COLONY USING UAV AND SATELLITE |
title_short |
INTRASEASONAL VARIABILITY OF GUANO STAINS IN A REMOTELY SENSED PENGUIN COLONY USING UAV AND SATELLITE |
title_full |
INTRASEASONAL VARIABILITY OF GUANO STAINS IN A REMOTELY SENSED PENGUIN COLONY USING UAV AND SATELLITE |
title_fullStr |
INTRASEASONAL VARIABILITY OF GUANO STAINS IN A REMOTELY SENSED PENGUIN COLONY USING UAV AND SATELLITE |
title_full_unstemmed |
INTRASEASONAL VARIABILITY OF GUANO STAINS IN A REMOTELY SENSED PENGUIN COLONY USING UAV AND SATELLITE |
title_sort |
intraseasonal variability of guano stains in a remotely sensed penguin colony using uav and satellite |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/isprs-annals-IV-2-W5-111-2019 https://doaj.org/article/71c71d65c59b4ae08f7b15dbe92260b8 |
long_lat |
ENVELOPE(141.604,141.604,-66.775,-66.775) ENVELOPE(-58.953,-58.953,-62.201,-62.201) ENVELOPE(-58.933,-58.933,-62.213,-62.213) |
geographic |
Antarctic Southern Ocean The Antarctic South Shetland Islands Guano Ardley Ardley Island |
geographic_facet |
Antarctic Southern Ocean The Antarctic South Shetland Islands Guano Ardley Ardley Island |
genre |
Antarc* Antarctic Antarctica Ardley Island South Shetland Islands Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ardley Island South Shetland Islands Southern Ocean |
op_source |
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol IV-2-W5, Pp 111-118 (2019) |
op_relation |
https://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/IV-2-W5/111/2019/isprs-annals-IV-2-W5-111-2019.pdf https://doaj.org/toc/2194-9042 https://doaj.org/toc/2194-9050 doi:10.5194/isprs-annals-IV-2-W5-111-2019 2194-9042 2194-9050 https://doaj.org/article/71c71d65c59b4ae08f7b15dbe92260b8 |
op_doi |
https://doi.org/10.5194/isprs-annals-IV-2-W5-111-2019 |
container_title |
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
container_volume |
IV-2/W5 |
container_start_page |
111 |
op_container_end_page |
118 |
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1766265872710631424 |