Polar Biology最新文献_第9页

Sponges (Porifera) from the Ross Sea (Southern Ocean) with taxonomic and molecular re-description of two uncommon species 南大洋罗斯海的海绵(Porifera)及其两个不常见种的分类和分子重新描述

4区环境科学与生态学

Polar Biology Pub Date : 2023-10-27 DOI: 10.1007/s00300-023-03205-w

Gabriele Costa, Angelina Lo Giudice, Maria Papale, Carmen Rizzo, Maurizio Azzaro, Alice Guzzi, Marco Grillo, Marco Bertolino

引用次数: 0

Wild Mountain reindeer Rangifer tarandus tarandus winter foraging: snow-free areas a key resource for feeding 野生山地驯鹿tarandus tarandus冬季觅食:无雪区是重要的觅食资源

4区环境科学与生态学

Polar Biology Pub Date : 2023-10-21 DOI: 10.1007/s00300-023-03204-x

Marijanne Holtan, Olav Strand, Leif Kastdalen, Dag K. Bjerketvedt, Arvid Odland, Roland Pape, Jan Heggenes

{"title":"Wild Mountain reindeer Rangifer tarandus tarandus winter foraging: snow-free areas a key resource for feeding","authors":"Marijanne Holtan, Olav Strand, Leif Kastdalen, Dag K. Bjerketvedt, Arvid Odland, Roland Pape, Jan Heggenes","doi":"10.1007/s00300-023-03204-x","DOIUrl":"https://doi.org/10.1007/s00300-023-03204-x","url":null,"abstract":"Abstract In a landscape with patchily distributed forage resources, an animal’s distribution may reflect the distribution of the resources if the population is forage-limited in time or space. This may be particularly explicit in climatically extreme and seasonally variable environments, notably alpine and polar environments during winter. Sustainable management considers the amount of available alpine ground lichen in winter as a predictor of carrying capacity for the last remaining populations of wild European Mountain reindeer Rangifer tarandus tarandus in alpine environments in South Norway. Ground lichen growth is constrained to elevated, wind-blown, snow-free ridges. However, wild Mountain reindeer also persist in areas providing little lichen resources. Our alternative functional hypothesis is that the critical resource is the amount of snow-free feeding areas during winter, which provide direct access to forage, likely to be energy-profitable regardless of the type of vegetation. We sampled animal-borne videos from wild Mountain reindeer during maximum accumulation of snow in late winter/spring, in three contrasting areas providing variable amounts of ground lichen and alternative vegetation resources. Direct observations of reindeer foraging via videos document an active selection and strong preference for feeding on snow-free patches, regardless of type of vegetation. Active ‘cratering’ in snow was not observed. In contrast, walking behaviours occurred much more frequently across snow-covered areas. Remote sensing data and analyses corroborated these observations. In the sustainable management of wild Mountain reindeer amounts of vegetated snow-free areas is an important functional predictor of winter carrying capacity.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"111 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135512162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Extensive microphytobenthos mats of invasive Vaucheria aff. compacta and abiotic environmental factors influencing its abundance in Adventfjorden tidal flat, Svalbard 斯瓦尔巴群岛Adventfjorden潮滩入侵型致密水貂微底栖植物群及其非生物环境因素影响

4区环境科学与生态学

Polar Biology Pub Date : 2023-10-16 DOI: 10.1007/s00300-023-03203-y

Claude-Eric Souquieres, Jana Kvíderová, Josef Elster

引用次数: 0

Historical review and contribution to the knowledge of Amythas membranifera (Ampharetidae): an integrative perspective of an Antarctic polychaete 历史回顾和贡献的知识Amythas membranifera(双栉虫科):南极的一个综合的角度多毛纲的

4区环境科学与生态学

Polar Biology Pub Date : 2023-10-12 DOI: 10.1007/s00300-023-03202-z

Orlemir Carrerette, Mônica A. V. Petti, Dong-U. Kim, Sandra Bromberg, Gilberto Bergamo, Paulo Y. G. Sumida, In-Young Ahn

引用次数: 0

Recruitment dynamics of Hiatella arctica within a high Arctic site (Young Sound Fjord, NE Greenland) 在北极高纬度地区(格陵兰岛东北部年轻峡湾)Hiatella Arctic的招聘动态

4区环境科学与生态学

Polar Biology Pub Date : 2023-10-04 DOI: 10.1007/s00300-023-03201-0

Delphine Veillard, Réjean Tremblay, Mikael K. Sejr, Laurent Chauvaud, Emmanuelle Cam, Frédéric Olivier

引用次数: 0

A review of aerial survey density estimates of bearded seals (Erignathus barbatus) in the Canadian Arctic highlights important knowledge gaps and research needs 对加拿大北极地区胡须海豹(Erignathus barbatus)的航空调查密度估计的回顾突出了重要的知识空白和研究需求

4区环境科学与生态学

Polar Biology Pub Date : 2023-09-28 DOI: 10.1007/s00300-023-03200-1

Matthew Fuirst, Steven H. Ferguson, Jeff W. Higdon, Brent G. Young, Ellen V. Lea, William R. Koski, David J. Yurkowski

{"title":"A review of aerial survey density estimates of bearded seals (Erignathus barbatus) in the Canadian Arctic highlights important knowledge gaps and research needs","authors":"Matthew Fuirst, Steven H. Ferguson, Jeff W. Higdon, Brent G. Young, Ellen V. Lea, William R. Koski, David J. Yurkowski","doi":"10.1007/s00300-023-03200-1","DOIUrl":"https://doi.org/10.1007/s00300-023-03200-1","url":null,"abstract":"Abstract There has been significant sea ice loss in the Arctic as a result of climate change, with measurable impacts on available habitat for ice-obligate marine mammals. Bearded seals ( Erignathus barbatus ) have a circumpolar distribution and primarily inhabit coastal areas of shallower depths with seasonal pack ice cover. However, there is limited information and no formal estimates on population abundance and densities of bearded seals within Canada. Here, we review historic field reports and publications from aerial surveys conducted from 1974 to 2022 to compile the density and abundance estimates of bearded seals across Canadian waters. Aerial surveys for marine mammals have been flown in several areas across the Canadian Arctic, including the Beaufort Sea (1974–2006), Canadian High Arctic (1979–2022), Baffin Bay-Davis Strait (1979–2014), and the Hudson Complex (1994–2017). After reviewing all published data sources, we report that the density of bearded seals in Canada were highest (and highly variable) in the Beaufort Sea (0.01–8.68 seals*km −2 ), then in Baffin Bay-Davis Strait (0.004–8.3 seals*km −2 ), and lowest and less variable inter-annually in the Hudson Complex (0.02 to 0.12 seals*km −2 ) at the time of these surveys. We also determined that bearded seals are more often found in areas of patchy ice cover (50–75%) with shallow water depths ≤ 500 m. Further, this review identifies regions within the Canadian Arctic and sub-Arctic that require updated aerial survey information. Quantifying the abundance and density estimates of bearded seals in Canada is essential for monitoring population status over time to better understand how this species is responding to environmental variation from anthropogenic activity and climate change.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135386679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Incubation behaviour of Arctic (Sterna paradisaea) and Antarctic (Sterna vittata) terns under disturbance by humans and predators 北极燕鸥(Sterna paradisaea)和南极燕鸥(Sterna vittata)在人类和捕食者干扰下的孵化行为

4区环境科学与生态学

Polar Biology Pub Date : 2023-09-27 DOI: 10.1007/s00300-023-03199-5

Tereza Hromádková, Václav Pavel, Karel Weidinger

引用次数: 0

Pack-ice seals contribute to biological transfers of iron in the Southern Ocean 浮冰海豹有助于南大洋铁的生物转移

4区环境科学与生态学

Polar Biology Pub Date : 2023-09-25 DOI: 10.1007/s00300-023-03198-6

Lola Gilbert, Jérôme Spitz, Tiphaine Jeanniard-du-Dot

引用次数: 0

Effect of dissolved iron (II) and temperature on growth of the Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica 溶解铁(II)和温度对南大洋浮游植物白茅和南极褐囊藻生长的影响

4区环境科学与生态学

Polar Biology Pub Date : 2023-09-24 DOI: 10.1007/s00300-023-03191-z

Helene Aflenzer, Linn Hoffmann, Thomas Holmes, Kathrin Wuttig, Cristina Genovese, Andrew Ross Bowie

{"title":"Effect of dissolved iron (II) and temperature on growth of the Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica","authors":"Helene Aflenzer, Linn Hoffmann, Thomas Holmes, Kathrin Wuttig, Cristina Genovese, Andrew Ross Bowie","doi":"10.1007/s00300-023-03191-z","DOIUrl":"https://doi.org/10.1007/s00300-023-03191-z","url":null,"abstract":"Abstract Low bioavailability of the vital element iron (Fe) limits primary production in large regions of the Southern Ocean, thus impacting phytoplankton community structures. Primary productivity seems to be particularly sensitive to the reduced form of iron (Fe(II)), which is thought to be the most readily bioavailable redox form of Fe in the ocean. Here, we investigated the impact of temperature (3 °C, 5 °C and 7 °C) and Fe(II) additions (+ 5 nM) on growth of two Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica in coastal and open ocean water. At all tested temperatures, growth rates of P. antarctica were significantly higher with added iron, compared to the treatments without added iron in both waters. Temperature only had a significant effect on the growth rate of this species when it was raised to 7 °C in all treatments. For F. cylindrus , growth rates only significantly increased with iron addition at 7 °C in both water types. Temperature did not affect the growth rate of F. cylindrus except for a significant reduction without iron addition at 7 °C in coastal water. These results highlight the complex interactions between Fe bioavailability and temperature on Southern Ocean phytoplankton growth. Thus, certain Southern Ocean phytoplankton species may have higher growth rates in regions of the ocean that will warm the most and possibly experience greater Fe supply under future climate conditions, such as coastal regions. This may result in changes in phytoplankton community structures with implications for carbon sequestration efficiency under future climate conditions.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135924657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Landscape predictors and spatial distribution of little brown myotis (Myotis lucifugus) coastal foraging habitat along the Northern Gulf of Alaska 阿拉斯加州北湾沿岸褐小肌虫觅食生境的景观预测及空间分布

4区环境科学与生态学

Polar Biology Pub Date : 2023-09-23 DOI: 10.1007/s00300-023-03194-w

Timothy C. Mullet, Paul Burger

引用次数: 0