The interaction between island geomorphology and environmental parameters drives Adélie penguin breeding phenology on neighboring islands near Palmer Station, Antarctica
Despite many studies on Adélie penguin breeding phenology, understanding the drivers of clutch initiation dates (CIDs, egg 1 lay date) is limited or lacks consensus. Here, we investigated Adélie penguin CIDs over 25years (1991-2016) on two neighboring islands, Torgersen and Humble (<1km apart), i...
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ftcdlib:oai:escholarship.org:ark:/13030/qt55m4h6db 2023-10-25T01:28:09+02:00 The interaction between island geomorphology and environmental parameters drives Adélie penguin breeding phenology on neighboring islands near Palmer Station, Antarctica Cimino, Megan A Patterson‐Fraser, Donna L Stammerjohn, Sharon Fraser, William R 9334 - 9349 2019-08-01 application/pdf https://escholarship.org/uc/item/55m4h6db unknown eScholarship, University of California qt55m4h6db https://escholarship.org/uc/item/55m4h6db public Ecology and Evolution, vol 9, iss 16 Biological Sciences Ecology Evolutionary Biology Climate Action Adelie penguin breeding phenology climate change ecological threshold environmental drivers sea ice Adélie penguin Ecological applications article 2019 ftcdlib 2023-09-25T18:04:43Z Despite many studies on Adélie penguin breeding phenology, understanding the drivers of clutch initiation dates (CIDs, egg 1 lay date) is limited or lacks consensus. Here, we investigated Adélie penguin CIDs over 25years (1991-2016) on two neighboring islands, Torgersen and Humble (<1km apart), in a rapidly warming region near Palmer Station, Antarctica. We found that sea ice was the primary large-scale driver of CIDs and precipitation was a secondary small-scale driver that fine-tunes CID to island-specific nesting habitat geomorphology. In general, CIDs were earlier (later) when the spring sea ice retreat was earlier (later) and when the preceding annual ice season was shorter (longer). Island-specific effects related to precipitation and island geomorphology caused greater snow accumulation and delayed CIDs by ~2days on Torgersen compared to Humble Island. When CIDs on the islands were similar, conditions were mild with less snow across breeding sites. At Torgersen Island, the negative relationship between CID and breeding success highlights detrimental effects of delayed breeding and/or snow on penguin fitness. Past phenological studies reported a relationship between air temperature and CID, assumed to be related to precipitation, but we found air temperature was more highly correlated to sea ice, revealing a misinterpretation of temperature effects. Finally, contrasting trends in CIDs based on temporal shifts in regional sea ice patterns revealed trends toward earlier CIDs (4-6day advance) from 1979 to 2009 as the annual ice season shortened, and later CIDs (7-10day delay) from 2010 to 2016 as the annual ice season lengthened. Adélie penguins tracked environmental conditions with flexible breeding phenology, but their life history remains vulnerable to subpolar weather conditions that can delay CIDs and decrease breeding success, especially on landscapes where geomorphology facilitates snow accumulation. Article in Journal/Newspaper Adelie penguin Antarc* Antarctica Humble Island Sea ice Torgersen Island University of California: eScholarship Humble Island ENVELOPE(-64.087,-64.087,-64.765,-64.765) Palmer Station ENVELOPE(-64.050,-64.050,-64.770,-64.770) Palmer-Station ENVELOPE(-64.050,-64.050,-64.770,-64.770) Torgersen ENVELOPE(-64.074,-64.074,-64.773,-64.773) Torgersen Island ENVELOPE(-64.083,-64.083,-64.767,-64.767) |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Biological Sciences Ecology Evolutionary Biology Climate Action Adelie penguin breeding phenology climate change ecological threshold environmental drivers sea ice Adélie penguin Ecological applications |
spellingShingle |
Biological Sciences Ecology Evolutionary Biology Climate Action Adelie penguin breeding phenology climate change ecological threshold environmental drivers sea ice Adélie penguin Ecological applications Cimino, Megan A Patterson‐Fraser, Donna L Stammerjohn, Sharon Fraser, William R The interaction between island geomorphology and environmental parameters drives Adélie penguin breeding phenology on neighboring islands near Palmer Station, Antarctica |
topic_facet |
Biological Sciences Ecology Evolutionary Biology Climate Action Adelie penguin breeding phenology climate change ecological threshold environmental drivers sea ice Adélie penguin Ecological applications |
description |
Despite many studies on Adélie penguin breeding phenology, understanding the drivers of clutch initiation dates (CIDs, egg 1 lay date) is limited or lacks consensus. Here, we investigated Adélie penguin CIDs over 25years (1991-2016) on two neighboring islands, Torgersen and Humble (<1km apart), in a rapidly warming region near Palmer Station, Antarctica. We found that sea ice was the primary large-scale driver of CIDs and precipitation was a secondary small-scale driver that fine-tunes CID to island-specific nesting habitat geomorphology. In general, CIDs were earlier (later) when the spring sea ice retreat was earlier (later) and when the preceding annual ice season was shorter (longer). Island-specific effects related to precipitation and island geomorphology caused greater snow accumulation and delayed CIDs by ~2days on Torgersen compared to Humble Island. When CIDs on the islands were similar, conditions were mild with less snow across breeding sites. At Torgersen Island, the negative relationship between CID and breeding success highlights detrimental effects of delayed breeding and/or snow on penguin fitness. Past phenological studies reported a relationship between air temperature and CID, assumed to be related to precipitation, but we found air temperature was more highly correlated to sea ice, revealing a misinterpretation of temperature effects. Finally, contrasting trends in CIDs based on temporal shifts in regional sea ice patterns revealed trends toward earlier CIDs (4-6day advance) from 1979 to 2009 as the annual ice season shortened, and later CIDs (7-10day delay) from 2010 to 2016 as the annual ice season lengthened. Adélie penguins tracked environmental conditions with flexible breeding phenology, but their life history remains vulnerable to subpolar weather conditions that can delay CIDs and decrease breeding success, especially on landscapes where geomorphology facilitates snow accumulation. |
format |
Article in Journal/Newspaper |
author |
Cimino, Megan A Patterson‐Fraser, Donna L Stammerjohn, Sharon Fraser, William R |
author_facet |
Cimino, Megan A Patterson‐Fraser, Donna L Stammerjohn, Sharon Fraser, William R |
author_sort |
Cimino, Megan A |
title |
The interaction between island geomorphology and environmental parameters drives Adélie penguin breeding phenology on neighboring islands near Palmer Station, Antarctica |
title_short |
The interaction between island geomorphology and environmental parameters drives Adélie penguin breeding phenology on neighboring islands near Palmer Station, Antarctica |
title_full |
The interaction between island geomorphology and environmental parameters drives Adélie penguin breeding phenology on neighboring islands near Palmer Station, Antarctica |
title_fullStr |
The interaction between island geomorphology and environmental parameters drives Adélie penguin breeding phenology on neighboring islands near Palmer Station, Antarctica |
title_full_unstemmed |
The interaction between island geomorphology and environmental parameters drives Adélie penguin breeding phenology on neighboring islands near Palmer Station, Antarctica |
title_sort |
interaction between island geomorphology and environmental parameters drives adélie penguin breeding phenology on neighboring islands near palmer station, antarctica |
publisher |
eScholarship, University of California |
publishDate |
2019 |
url |
https://escholarship.org/uc/item/55m4h6db |
op_coverage |
9334 - 9349 |
long_lat |
ENVELOPE(-64.087,-64.087,-64.765,-64.765) ENVELOPE(-64.050,-64.050,-64.770,-64.770) ENVELOPE(-64.050,-64.050,-64.770,-64.770) ENVELOPE(-64.074,-64.074,-64.773,-64.773) ENVELOPE(-64.083,-64.083,-64.767,-64.767) |
geographic |
Humble Island Palmer Station Palmer-Station Torgersen Torgersen Island |
geographic_facet |
Humble Island Palmer Station Palmer-Station Torgersen Torgersen Island |
genre |
Adelie penguin Antarc* Antarctica Humble Island Sea ice Torgersen Island |
genre_facet |
Adelie penguin Antarc* Antarctica Humble Island Sea ice Torgersen Island |
op_source |
Ecology and Evolution, vol 9, iss 16 |
op_relation |
qt55m4h6db https://escholarship.org/uc/item/55m4h6db |
op_rights |
public |
_version_ |
1780732292410376192 |