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Last Checked: Apr 19, 2024, 09:21 EDT
| IP Address: | 104.47.75.156 |
| ASN #: | AS8075 MICROSOFT-CORP-MSN-AS-BLOCK, US |
| Location: | Unknown, Unknown, Unknown |
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<title>High resolution imagery advances the ability to monitor decadal changes in emperor penguin populations | ScienceDaily</title>
<meta name="description" content="Emperor penguin populations have been exceedingly difficult to monitor because of their remote locations, and because individuals form breeding colonies on seasonal sea ice fastened to land (known as fast ice) during the dark and cold Antarctic winter. New research that incorporates very high-resolution satellite imagery with field-based validation surveys and long-term data has provided the first multi-year time series that documents emperor penguin global population trends." id="metasummary">
<meta name="keywords" content="Zoology; Nature; Birds; Ecology Research; Global Warming; Environmental Awareness; Climate; Environmental Issues" id="metakeywords">
<meta name="last-modified" content="Fri, 19 Apr 2024 12:02:00 GMT">
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<meta property="og:title" id="og_title" content="High resolution imagery advances the ability to monitor decadal changes in emperor penguin populations">
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<meta property="og:description" id="og_description" content="Emperor penguin populations have been exceedingly difficult to monitor because of their remote locations, and because individuals form breeding colonies on seasonal sea ice fastened to land (known as fast ice) during the dark and cold Antarctic winter. New research that incorporates very high-resolution satellite imagery with field-based validation surveys and long-term data has provided the first multi-year time series that documents emperor penguin global population trends.">
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<h1 id="headline" class="headline">High resolution imagery advances the ability to monitor decadal changes in emperor penguin populations</h1>
<h2 id="subtitle" class="subtitle">Researchers report nearly 10% fewer birds, according to new study</h2>
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<dt>Date:</dt>
<dd id="date_posted">March 13, 2024</dd>
<dt>Source:</dt>
<dd id="source">Woods Hole Oceanographic Institution</dd>
<dt>Summary:</dt>
<dd id="abstract">Emperor penguin populations have been exceedingly difficult to monitor because of their remote locations, and because individuals form breeding colonies on seasonal sea ice fastened to land (known as fast ice) during the dark and cold Antarctic winter. New research that incorporates very high-resolution satellite imagery with field-based validation surveys and long-term data has provided the first multi-year time series that documents emperor penguin global population trends.
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<p id="first" class="lead">Emperor penguin populations have been exceedingly difficult to monitor because of their remote locations, and because individuals form breeding colonies on seasonal sea ice fastened to land (known as fast ice) during the dark and cold Antarctic winter.</p>
<div id="text">
<p>Now, new research that incorporates very high resolution (VHR) satellite imagery with field-based validation surveys and long-term data has provided the first multi-year time series that documents emperor penguin global population trends.</p>
<p>Researchers observed nearly 10% fewer birds in 2018 compared with in 2009, according to a new study that used VHR satellite imagery with 30-60-centimeter ground resolution to examine the entirety of the penguins' range during springtime around the Antarctic coast. The research appears in the journal article, "Advances in remote sensing of emperor penguins: first multi-year time series documenting trends in the global population," published in the journal <em>Proceedings of the Royal Society B. </em></p>
<p>Scientists cannot yet explain the population trend. However, additional research should help with a better understanding of the causal factors -- including the role of climate change. Further, this new monitoring methodology could help in the development of adaptive conservation management efforts.</p>
<p>"What we did in this paper, and through international collaborative research, was to develop the state-of-the-art approach to monitoring emperor penguins across all of Antarctica, including in remote places that are inhospitable to people. Having the very high resolution satellite imagery is a breakthrough in our understanding of the spatial distribution of emperor penguins, and having this global population trend is very important for conservation," said journal article senior author Stephanie Jenouvrier, senior scientist in the Woods Hole Oceanographic Institution's Biology Department.</p>
<p>Jenouvrier noted that the computer modeling takes into account many processes and uncertainties related to penguin population and life history.</p>
<p>"Although we cannot yet clearly attribute this penguin population trend to any particular mechanism such as climate change, there is an accumulation of evidence that the environment is changing and it does not seem to be an environment where penguins are going to endure," Jenouvrier explained.</p>
<div id="insertion_middle"></div>
<p>The researchers say that the results from the study gives them the potential to make more informed predictions combining monitoring methods and technologies (e.g., field-based, and remote sensing). They note that these will require evaluation of assumptions regarding observation and data processing errors.</p>
<p>"Our work documents change in an iconic polar seabird and shows how useful remote sensing can be to understand animals that live in wild places," according to journal article co-lead author Michelle LaRue, who is an associate professor at University of Canterbury in New Zealand and research associate at the University of Minnesota Twin Cities in the United States. "In a rapidly changing world, we have to constantly push the envelope to combine new approaches with tried-and-true methods if we want to understand the consequences of that change, especially in places we cannot get to."</p>
<p>LaRue said combining satellite images with animal tracking, ground observations and molecular tools (like genetic analysis) will be needed if they want to fully understand mechanisms to describe some of the changes they observe.</p>
<p>During the course of the study, researchers detected several new colonies, bringing the total to 66 known colony locations. It is now highly probable that most emperor penguin colony locations have been detected, with about half having been detected with satellite imagery, according to the paper.</p>
<p>In addition, the research identified the East Indian Ocean and Weddell Sea areas of Antarctica as being the two sectors of the continent where there is the greatest probability of declines in regional populations of emperor penguins. These are locations where the extent of fast ice generally has decreased in recent decades. Emperor penguins primarily form colonies and rear their chicks on fast ice.</p>
<p>"We don't understand the population trend in full, and we need to do more research. However, the fact that we have detected a population trend in such a short data set is really important because it potentially has major implications for the future of the species," said journal article co-author Philip Trathan, an emeritus fellow with the British Antarctic Survey where he previously was head of conservation ecology. "Projections indicate that emperor penguins are going to be struggling to survive into the future. So, having tools that allow us to ground truth some of the population models in the future will be really important."</p>
<p>The journal article authors said that with this new methodology, there is now a way forward to assess the population status and trends of emperor penguins at a global scale, which provides an invaluable tool for adaptive conservation planning in a changing Southern Ocean.</p>
<p>Funding for this research was provided by the National Science Foundation, NASA; the French Polar Institute Paul-Émile Victor, Alfred Wegener Institute for Polar and Marine Research in the Helmholtz Association, World Wide Fund for Nature (UK), and the German Research Foundation.</p>
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<p><a href="https://www.whoi.edu/press-room/news-release/high-resolution-imagery-advances-the-ability-to-monitor-decadal-changes-in-emperor-penguin-populations/" style="text-decoration: underline" rel="noopener noreferrer" target="_blank">Materials</a> provided by <a href="https://www.whoi.edu/" rel="noopener noreferrer" target="_blank"><strong>Woods Hole Oceanographic Institution</strong></a>. <em>Note: Content may be edited for style and length.</em></p>
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<div id="journal_references"><p><strong>Journal Reference</strong>:</p>
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<li>Michelle LaRue, David Iles, Sara Labrousse, Peter Fretwell, David Ortega, Eileen Devane, Isabella Horstmann, Lise Viollat, Rose Foster-Dyer, Céline Le Bohec, Daniel Zitterbart, Aymeric Houstin, Sebastian Richter, Alexander Winterl, Barbara Wienecke, Leo Salas, Monique Nixon, Christophe Barbraud, Gerald Kooyman, Paul Ponganis, David Ainley, Philip Trathan, Stephanie Jenouvrier. <strong>Advances in remote sensing of emperor penguins: first multi-year time series documenting trends in the global population</strong>. <em>Proceedings of the Royal Society B: Biological Sciences</em>, 2024; 291 (2018) DOI: <a href="http://dx.doi.org/10.1098/rspb.2023.2067" style="text-decoration: underline" rel="noopener noreferrer" target="_blank">10.1098/rspb.2023.2067</a>
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