Polar Biology最新文献_第10页

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

Moss bank composition on Galindez Island (Argentine Islands, maritime Antarctic) 加林德兹岛(阿根廷群岛，南极海域)的苔藓滩组成

4区环境科学与生态学

Polar Biology Pub Date : 2023-09-23 DOI: 10.1007/s00300-023-03197-7

Mariusz Wierzgoń, Viktoria Ivanets, Yevheniia Prekrasna-Kviatkovska, Vítězslav Plášek, Ivan Parnikoza

引用次数: 0

Marine diets of anadromous Arctic char (Salvelinus alpinus) and pink salmon (Oncorhynchus gorbuscha) in Svalbard, Norway 挪威斯瓦尔巴群岛溯河北极鲑(Salvelinus alpinus)和粉红鲑(Oncorhynchus gorbuscha)的海洋饮食

4区环境科学与生态学

Polar Biology Pub Date : 2023-09-22 DOI: 10.1007/s00300-023-03196-8

Olof Bengtsson, Christian Lydersen, Guttorm Christensen, Jan Marcin Węsławski, Kit M. Kovacs

{"title":"Marine diets of anadromous Arctic char (Salvelinus alpinus) and pink salmon (Oncorhynchus gorbuscha) in Svalbard, Norway","authors":"Olof Bengtsson, Christian Lydersen, Guttorm Christensen, Jan Marcin Węsławski, Kit M. Kovacs","doi":"10.1007/s00300-023-03196-8","DOIUrl":"https://doi.org/10.1007/s00300-023-03196-8","url":null,"abstract":"Abstract During summer, native anadromous Arctic char ( Salvelinus alpinus ) and the alien species pink salmon ( Oncorhynchus gorbuscha ) now coexist in marine environments in Svalbard, following the introduction of the latter in the Barents Region. To investigate potential dietary competition between these two salmonid species, stomach contents from Arctic char ( n = 301) and pink salmon ( n = 28) were sampled from different areas within the archipelago. The most important prey in terms of biomass for both salmonid species were amphipods; Themisto libellula ( B = 26.0%) for Arctic char and Onisimus litoralis ( B = 35.0%) for pink salmon. Pianka’s niche overlap revealed that dietary overlap between the two species was moderately high ( O obs = 0.59); both species had strong associations with intertidal invertebrates in areas where direct comparisons were possible (Kongsfjorden/Krossfjorden). However, both salmonid species did also eat some fish, with Arctic char consuming more offshore pelagic fish, while the small number of fish eaten by pink salmon were primarily coastal demersal fish species. Arctic char was a more generalist feeder, while pink salmon was more of a dietary specialist. Furthermore, the diet composition of the Arctic char consisted of 32.9% Atlantic prey while the pink salmon, surprisingly, ate only Arctic species, likely due to their tightly coastal feeding habits. Even though the sample size for pink salmon was low, this study contributes new insights into salmonid diets in Svalbard and the potential for introduced species to compete with native Arctic endemics, particularly in the expected warmer Arctic of the future.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136062099","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

Brown Skua and south polar Skua (Aves: Stercorariidae) a hybridization case or same species? 褐贼鸥与南极贼鸥是杂交还是同一种?

4区环境科学与生态学

Polar Biology Pub Date : 2023-09-20 DOI: 10.1007/s00300-023-03193-x

Ana Carolina Marinho Mota, Erli Schneider Costa, João Paulo Machado Torres, Jansen de Araujo, Larissa Castro Tormena, Gisele Pires de Mendonça Dantas

引用次数: 0

Cryptorchidism in the sub-Antarctic fur seal Arctocephalus tropicalis 亚南极海狗的隐睾症

4区环境科学与生态学

Polar Biology Pub Date : 2023-09-18 DOI: 10.1007/s00300-023-03195-9

M. N. Bester

引用次数: 0

The significance of recent glacial history for the limno-terrestrial microfauna in Trygghamna (Svalbard, High Arctic) 最近冰期历史对Trygghamna (Svalbard, High Arctic)湖沼-陆生小动物群的意义

4区环境科学与生态学

Polar Biology Pub Date : 2023-09-16 DOI: 10.1007/s00300-023-03192-y

Dzmitry Lukashanets, Jolita Petkuvienė, Rūta Barisevičiūtė

{"title":"The significance of recent glacial history for the limno-terrestrial microfauna in Trygghamna (Svalbard, High Arctic)","authors":"Dzmitry Lukashanets, Jolita Petkuvienė, Rūta Barisevičiūtė","doi":"10.1007/s00300-023-03192-y","DOIUrl":"https://doi.org/10.1007/s00300-023-03192-y","url":null,"abstract":"Abstract The diversity and spatial distribution of microscopic invertebrates in the Arctic have yet to be studied in detail. Knowledge of this is especially important in the context of glacier shrinking, one of the most visible environmental consequences of climate change. To understand how time since deglaciation shapes the communities of limno-terrestrial microfauna, we analysed samples of moss collected during the summer of 2021 in forefields of Trygghamna (Svalbard), where glaciers thought to have started to recede at the beginning of the twentieth century. We estimated the taxonomic and trophic composition and abundance of all microfauna groups (with a specific focus on little-known bdelloid rotifers) in two areas, which correspond to the different stages of the glacial retreat. The impact of 14 other environmental parameters (distance from the sea, moisture, moss structural complexity, soil nutrient, and isotopic composition) was considered. Thirty-seven microfauna taxa were found, wherein Dorylaimida nematodes (Dorylaimida, Nematoda) dominated both in frequency (present at all sites) and abundance (50 ± 21% from all individuals). Less prevalent bdelloid rotifers (Bdelloidea, Rotifera) were followed by tardigrades (Tardigrada), which, in contrast to others, were more abundant in the later deglaciated area. In general, environmental parameters explained 81.8% of the microfauna distribution. Time since deglaciation was the most significant factor (9.5%). Among the variables that act at a fine scale, the most important were moisture in the habitat (6%), presence of ground in the samples (4%), and δ 15 N (4%). The moss structural complexity did not have a significant effect, and neither did most of the variables characterising soil nutrient and isotopic composition. However, some variability was observed for different lower taxa.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135308167","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

Can penguins (Spheniscidae) see in the ultraviolet spectrum? 企鹅(企鹅科)能看到紫外线吗?

IF 1.7 4区环境科学与生态学

Polar Biology Pub Date : 2023-08-19 DOI: 10.1007/s00300-023-03188-8

P. Hadden, M. Vorobyev, William H. Hadden, F. Bonadonna, C. McGhee, Jie Zhang

引用次数: 0

A new ostracod species of the genus Xestoleberis from Nansen Island, Wilhelmina Bay, Southern Ocean, Antarctica 标题南极南大洋威廉敏纳湾南森岛介形类一新种

IF 1.7 4区环境科学与生态学

Polar Biology Pub Date : 2023-08-17 DOI: 10.1007/s00300-023-03189-7

O. Külköylüoğlu

引用次数: 0

A case of melanism in a Gentoo Penguin (Pygoscelis papua) at Esperanza/Hope Bay, Antarctica 南极埃斯佩兰萨/霍普湾一只巴布亚企鹅的黑化病例