Polar Biology最新文献_第5页

Multi-year mesozooplankton flux trends in Kongsfjorden, Svalbard 斯瓦尔巴群岛康斯峡湾多年中生浮游生物通量趋势

IF 1.7 4区环境科学与生态学

Polar Biology Pub Date : 2024-04-29 DOI: 10.1007/s00300-024-03251-y

Alessandra D’Angelo, Kyle Mayers, Jasmin Renz, Ilaria Conese, Stefano Miserocchi, Federico Giglio, Patrizia Giordano, Leonardo Langone

{"title":"Multi-year mesozooplankton flux trends in Kongsfjorden, Svalbard","authors":"Alessandra D’Angelo, Kyle Mayers, Jasmin Renz, Ilaria Conese, Stefano Miserocchi, Federico Giglio, Patrizia Giordano, Leonardo Langone","doi":"10.1007/s00300-024-03251-y","DOIUrl":"https://doi.org/10.1007/s00300-024-03251-y","url":null,"abstract":"We conducted this study to investigate the relationship between environmental stressors and mesozooplankton fluxes in inner Kongsfjorden, Svalbard. The ongoing Arctic amplification, characterized by phenomena such as increased temperatures, glacial and watershed runoff, and diminishing ice cover, poses significant challenges to marine ecosystems. Our multi-year time-series analysis (2010–2018) of mesozooplankton, collected from a moored automatic sediment trap at approximately 87 m depth, aims to elucidate seasonal and interannual variations in fluxes within this Arctic fjord. We integrate meteorological, hydrological, and chemical datasets to assess their influence on zooplankton populations. Principal component analysis reveals the impact of seawater characteristics on mesozooplankton fluxes and composition, while two-way ANOVA highlights the role of seasonality in driving variations in our dataset. We observe a decrease in swimmer fluxes following the maxima mass flux event (from 2013 onwards), coupled with an increase in community diversity, possibly attributed to copepod decline and functional diversity. Notably, sub-Arctic boreal species such as Limacina retroversa have been detected in the sediment trap since 2016. Our continuous multi-year dataset captures the physical, chemical, and biological dynamics in this extreme environment. With Arctic amplification in Kongsfjorden and increasing submarine and watershed runoff, we anticipate significant shifts in mesozooplankton communities in the medium to long-term. This underscores the urgency for further research on their adaptation to changing environmental conditions and the potential introduction of alien species.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"129 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140811597","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

I need some space: solitary nesting Adélie penguins demonstrate an alternative breeding strategy at Cape Crozier 我需要一些空间：独自筑巢的阿德利企鹅在克罗泽角展示了另一种繁殖策略

IF 1.7 4区环境科学与生态学

Polar Biology Pub Date : 2024-04-28 DOI: 10.1007/s00300-024-03246-9

A. M. Cox, D. J. Khor, M. L. Elrod, A. Lescroël, G. Ballard, A. E. Schmidt

{"title":"I need some space: solitary nesting Adélie penguins demonstrate an alternative breeding strategy at Cape Crozier","authors":"A. M. Cox, D. J. Khor, M. L. Elrod, A. Lescroël, G. Ballard, A. E. Schmidt","doi":"10.1007/s00300-024-03246-9","DOIUrl":"https://doi.org/10.1007/s00300-024-03246-9","url":null,"abstract":"According to the ‘selfish herd’ hypothesis, most seabird species breed colonially so that individuals can decrease their risk of predation by forming compact groups. However, costs and benefits associated with colonial breeding may not be evenly distributed among individuals within a colony. At Adélie penguin colonies, individuals nesting on the periphery of subcolonies (distinct groups of nests) may experience higher rates of nest predation by south polar skuas, and thus the optimal aggregation pattern for Adélie penguins may be within groups that minimize the proportion of edge nests. Nevertheless, some penguins choose to nest solitarily, at significant distances from conspecifics. We tracked 50 of these “solitary-nesting” Adélie penguins at Cape Crozier, a large colony on Ross Island, during the 2021 nesting season and compared their breeding success to individuals nesting within subcolony boundaries. We found that both solitary and subcolony nests successfully raised chicks large enough to join crèches and left unattended by adults. However, chicks from solitary nests exhibited a rate of mortality more than six times higher during the transition from nest brooding/guarding to crèche stage. In the 2022 nesting season, we found that solitary nests which had previously hosted actively breeding penguins were more likely to be re-occupied. Solitary nesting therefore appears to be a less-successful alternative to breeding within subcolonies, but enough individuals could be successful with this approach to maintain the apparently disadvantageous behavior and effectively pioneer previously unused locations, possibly including eventual new colony locations.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"78 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140811205","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

Dispersal potential does not predict recent range expansions of sub-Antarctic plant species 传播潜力无法预测亚南极植物物种最近的分布范围扩大情况

IF 1.7 4区环境科学与生态学

Polar Biology Pub Date : 2024-04-22 DOI: 10.1007/s00300-024-03250-z

Nompilo Mazibuko, Michelle Greve, Peter C. le Roux

{"title":"Dispersal potential does not predict recent range expansions of sub-Antarctic plant species","authors":"Nompilo Mazibuko, Michelle Greve, Peter C. le Roux","doi":"10.1007/s00300-024-03250-z","DOIUrl":"https://doi.org/10.1007/s00300-024-03250-z","url":null,"abstract":"Dispersal influences many key aspects of plant ecology at both fine- and broad scales. However, dispersal events are challenging to quantify as they are difficult to observe and measure accurately, despite the importance of understanding species’ dispersal capacity. In this study, we quantified dispersal estimates for the dominant vascular flora of sub-Antarctic Marion Island, using a mechanistic model to estimate dispersal potential via anemochory and standardized experiments that simulate dispersal events via zoochory, human activity, and thalassochory, to test if dispersal capacity correlates to contemporary range expansion of the island’s native and alien species. Our results demonstrate the broad range of dispersal potential in the island’s flora and represent the first quantification of the dispersal potential (via multiple vectors) of the dominant vascular flora in the sub-Antarctic. Dispersal potential was not related to range expansion rates of native or alien species, suggesting that other mechanisms are responsible for the variation observed in species range expansion rates. Although this finding contradicts expectations and evidence from some other studies, it is consistent with research conducted in alpine regions (which may be climatically and physiognomically similar to this sub-Antarctic study site) where factors such as demography and competition are more important predictors of species range expansion than their dispersal ability, dispersal syndromes, or dispersal-related traits.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"24 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140635417","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

A review of the Pacific sleeper shark Somniosus pacificus: biology and fishery interactions 太平洋睡鲨（Somniosus pacificus）回顾：生物学和渔业相互作用

IF 1.7 4区环境科学与生态学

Polar Biology Pub Date : 2024-04-14 DOI: 10.1007/s00300-024-03247-8

Mary Elizabeth Matta, Cindy A. Tribuzio, Lindsay N. K. Davidson, Keith R. Fuller, Garrett C. Dunne, Allen H. Andrews

{"title":"A review of the Pacific sleeper shark Somniosus pacificus: biology and fishery interactions","authors":"Mary Elizabeth Matta, Cindy A. Tribuzio, Lindsay N. K. Davidson, Keith R. Fuller, Garrett C. Dunne, Allen H. Andrews","doi":"10.1007/s00300-024-03247-8","DOIUrl":"https://doi.org/10.1007/s00300-024-03247-8","url":null,"abstract":"The Pacific sleeper shark Somniosus pacificus is a large-bodied and broad-ranging squaliform shark that occupies diverse habitats throughout the Pacific Ocean. Despite its large size and occurrence as bycatch in various commercial fisheries, little is known about even the most basic aspects of its biology and ecology. Observed declines in certain parts of its range, coupled with life history characteristics associated with low productivity, have led to conservation concerns for this cryptic but charismatic species. Here, we provide a comprehensive review of the current state of knowledge regarding the distribution, diet, life history, and other aspects of the Pacific sleeper shark and present updated fisheries and survey data for the eastern North Pacific Ocean. The most pressing research gaps identified during the course of this review concern habitat use at different life stages and basic life history information. While work is currently in progress to expand our base of knowledge for this species, we recommend a precautionary approach to management until sufficient information becomes available to ensure its conservation.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"72 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140599658","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

Proximity to infrastructure and ecotype influence breeding bird abundance at an Arctic mine, the Hope Bay Project, Nunavut, Canada 加拿大努纳武特的希望湾项目（Hope Bay Project）是一个北极矿场，其与基础设施的邻近程度和生态类型对该矿场的繁殖鸟类数量产生了影响

IF 1.7 4区环境科学与生态学

Polar Biology Pub Date : 2024-04-13 DOI: 10.1007/s00300-024-03244-x

Alice L. Merondun, Arianne Albert, Hannah Visty, Greg Sharam

{"title":"Proximity to infrastructure and ecotype influence breeding bird abundance at an Arctic mine, the Hope Bay Project, Nunavut, Canada","authors":"Alice L. Merondun, Arianne Albert, Hannah Visty, Greg Sharam","doi":"10.1007/s00300-024-03244-x","DOIUrl":"https://doi.org/10.1007/s00300-024-03244-x","url":null,"abstract":"As the Arctic becomes increasingly accessible to the resource extraction industry, an understanding of the impacts of infrastructure and anthropogenic disturbance on tundra-nesting avian populations is critical. We conducted breeding bird surveys using point counts and Program for Regional and International Shorebird Monitoring (PRISM) rapid surveys at the Hope Bay Project, an underground gold mine in Nunavut, Canada, from 2007 to 2015. We examined the relationship between abundance of total birds, songbirds, and shorebirds with distance from infrastructure, anthropogenic disturbance (i.e., activity at the mine site), and environmental covariates. Contrary to our predictions, anthropogenic disturbance showed no significant effect on bird abundance for either survey type or bird grouping. However, total bird abundance was associated with distance from infrastructure for both survey methods. A relationship with distance to infrastructure, with variability in influence, was also present for songbird point count data and shorebird PRISM data, but was not significant for songbirds recorded during PRISM surveys. Habitat type played a vital role in determining avian abundance, with PRISM surveys showing that wet lowland ecotypes supported higher bird numbers, whereas point count data revealed a more nuanced habitat association, likely reflecting the specific habitat preferences of different songbirds. Our study highlights the need for strategic planning of industrial development, incorporating comprehensive monitoring and ensuring the protection of preferred Arctic-breeding bird habitats. By aligning development projects with environmental objectives, we can ensure the coexistence of industrial interests and the future of avian populations in the Arctic.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"8 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140599656","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

Drone-based monitoring and geomorphology of southern giant petrel nests near Palmer Station, western Antarctic Peninsula 对南极半岛西部帕尔默站附近的南方巨海燕巢进行无人机监测和地貌研究

IF 1.7 4区环境科学与生态学

Polar Biology Pub Date : 2024-04-08 DOI: 10.1007/s00300-024-03243-y

Gregory D. Larsen, Hanna F. Varga, Donna L. Patterson-Fraser, David W. Johnston, Megan A. Cimino

{"title":"Drone-based monitoring and geomorphology of southern giant petrel nests near Palmer Station, western Antarctic Peninsula","authors":"Gregory D. Larsen, Hanna F. Varga, Donna L. Patterson-Fraser, David W. Johnston, Megan A. Cimino","doi":"10.1007/s00300-024-03243-y","DOIUrl":"https://doi.org/10.1007/s00300-024-03243-y","url":null,"abstract":"Human activities and climate change threaten seabirds globally, and many species are declining from already small breeding populations. Monitoring of breeding colonies can identify population trends and important conservation concerns, but it is a persistent challenge to achieve adequate coverage of remote and sensitive breeding sites. Southern giant petrels (Macronectes giganteus) exemplify this challenge: as polar, pelagic marine predators they are subject to a variety of anthropogenic threats, but they often breed in remote colonies that are highly sensitive to disturbance. Aerial remote sensing can overcome some of these difficulties to census breeding sites and explore how local environmental factors influence important characteristics such as nest-site selection and chick survival. To this end, we used drone photography to map giant petrel nests, repeatedly evaluate chick survival and quantify-associated physical and biological characteristics of the landscape at two neighboring breeding sites on Humble Island and Elephant Rocks, along the western Antarctic Peninsula in January–March 2020. Nest sites occurred in areas with relatively high elevations, gentle slopes, and high wind exposure, and statistical models predicted suitable nest-site locations based on local spatial characteristics, explaining 72.8% of deviance at these sites. These findings demonstrate the efficacy of drones as a tool to identify, map, and monitor seabird nests, and to quantify important habitat associations that may constitute species preferences or sensitivities. These may, in turn, contextualize some of the diverse population trajectories observed for this species throughout the changing Antarctic environment.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"37 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140599748","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

Rethinking the sub-Antarctic terrestrial N-cycle: evidence for organic N acquisition by Marion Island grasses 反思亚南极陆地氮循环：马里恩岛禾本科植物获取有机氮的证据

IF 1.7 4区环境科学与生态学

Polar Biology Pub Date : 2024-04-02 DOI: 10.1007/s00300-024-03240-1

{"title":"Rethinking the sub-Antarctic terrestrial N-cycle: evidence for organic N acquisition by Marion Island grasses","authors":"","doi":"10.1007/s00300-024-03240-1","DOIUrl":"https://doi.org/10.1007/s00300-024-03240-1","url":null,"abstract":"<h3>Abstract</h3> Organic N (oN, e.g., amino acids) is an important N-resource for plants in soils replete with oN but not inorganic N (iN; i.e., NH4+ and NO3−), such as cold ecosystems with temperature-limited soil decomposition rates. However, sub-Antarctic literature assumes that plants only acquire iN, potentially underestimating plant-available N. We hypothesised that Marion Island (− 46.90°, 37.75°) grasses (Polypogon magellanicus, Poa cookii, Agrostis stolonifera and Poa annua) acquire oN and that oN relative to iN provision affects plant growth. We investigated oN and iN uptake and growth responses in two hydroponics experiments. In situ N (15N-glycine, 15NO3− and 15NH4+) acquisition was investigated at three field sites with decreasing faunal influence, thus iN input and microbial activity. When plants grown in mire water were supplied with 15N-glycine or 15NO3−, root δ15N enrichment was highest for glycine-supplied plants. In the second hydroponics experiment, plant N-uptake rates (nmol g biomass−1 s−1) were significantly higher for glycine than NO3−, but relative growth rates (g g−1 d−1) lower on glycine. There were species-specific biomass allocation responses to N concentration (4 mM and 0.4 mM) and N-form (glycine and NO3−). Glycine-supplied grasses at the low iN concentration field sites had significantly higher δ15N enrichment relative to those at sites with high iN, suggesting higher oN uptake when iN is limiting. We demonstrate the importance of accounting for oN acquisition in the sub-Antarctic. As a system with high soil oN relative to iN, plants may predominantly meet N-demands through oN rather than iN acquisition.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"59 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140599746","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

Alterations in human health parameters during stressful ship voyage to Antarctica: effects of probiotics intervention 在前往南极洲的紧张航程中人体健康参数的变化：益生菌干预的效果

IF 1.7 4区环境科学与生态学

Polar Biology Pub Date : 2024-03-29 DOI: 10.1007/s00300-024-03242-z

Ashish Kumar Srivastava, Brij Bhushan, Malleswara Rao Eslavath, Harshita Gupta, Sudipta Chanda, Vishwendra Vikram Singh, Som Nath Singh, Bhuvnesh Kumar, Rajeev Varshney, Lilly Ganju

{"title":"Alterations in human health parameters during stressful ship voyage to Antarctica: effects of probiotics intervention","authors":"Ashish Kumar Srivastava, Brij Bhushan, Malleswara Rao Eslavath, Harshita Gupta, Sudipta Chanda, Vishwendra Vikram Singh, Som Nath Singh, Bhuvnesh Kumar, Rajeev Varshney, Lilly Ganju","doi":"10.1007/s00300-024-03242-z","DOIUrl":"https://doi.org/10.1007/s00300-024-03242-z","url":null,"abstract":"Ship voyage to Antarctica under stressful conditions impacts the health of expedition members. Measures can be taken to prevent adverse physical and psychological effects. Compared with minimally stressed control subjects in Delhi (India), these effects were investigated in a placebo-controlled study with multi-species probiotics intervention on selected anthropometric, body physiological and biochemical parameters. Total 39 participants volunteered for the study, of which 19 participated in the Antarctic expedition by ship voyage and 20 were the control subjects at Delhi. Participants were randomly divided into two groups and received daily either a probiotic or placebo for 24 days. The results suggest that probiotic intervention during the Antarctic ship voyage reduced sea sickness in probiotic group (10% cases) compared to the placebo group (44% cases). After completion of the ship voyage and intervention, body anthropometric parameters were maintained in the probiotic group. In contrast, significant alterations were observed in the placebo group with respect to their body composition and biochemical parameters as compared to the control group in Delhi. This allows the conclusion that multi-species probiotic intervention may benefit anthropometric and biochemical parameters and reduce the negative influence of stress during the ship voyage. These findings may be useful in improving expedition members’ physiological health and body homeostasis during stressful conditions.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"34 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140325183","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

Residues of anthropogenic origin found at Stranger Point/Cabo Funes, 25 de Mayo/King George Island, Antarctica 在南极洲五月二十五日/乔治王岛 Stranger Point/Cabo Funes 发现的人为残留物

IF 1.7 4区环境科学与生态学

Polar Biology Pub Date : 2024-03-26 DOI: 10.1007/s00300-024-03241-0

Katya K. Albarrán, Brenda C. Alfonso, Jazmin Fógel, Mauro G. Rozas Sía, Maria L. Abbeduto, Ricardo Casaux, Mariana A. Juáres

{"title":"Residues of anthropogenic origin found at Stranger Point/Cabo Funes, 25 de Mayo/King George Island, Antarctica","authors":"Katya K. Albarrán, Brenda C. Alfonso, Jazmin Fógel, Mauro G. Rozas Sía, Maria L. Abbeduto, Ricardo Casaux, Mariana A. Juáres","doi":"10.1007/s00300-024-03241-0","DOIUrl":"https://doi.org/10.1007/s00300-024-03241-0","url":null,"abstract":"Since the Antarctic continent is not exempt from human disturbances, it is necessary to generate information on the residues of anthropogenic origin in these environments. The main aim of our study was to determine the presence and abundance of anthropogenic residues found around the pygoscelid penguin colony of the Antarctic Specially Protected Area No. 132 \"Potter Peninsula\" (25 de Mayo/King George Island, South Shetland Islands, Antarctica), in order to contribute with information on the distribution of anthropogenic residues that have been recorded in different regions of the Antarctic Peninsula and the Scotia Arc. A total of 37 anthropogenic elements (821.73 g) were collected between September 2021 and March 2022. According to the type of material, the most abundant were 'various plastic residue' (54.05%) and 'consumer plastic residue' (35.14%). Regarding size, most of the elements had a length between 15 and 30 cm, followed by those with a length < 5 cm, while regarding color, white residues were the most common (n = 9), followed by transparent ones (n = 7). The origin of these residues could be found in fishing, tourism, logistics and scientific activities. It is important to continue monitoring residues to assess potential impacts on biota and the environment.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"9 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140313024","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

Fatty acid profiles and stable isotope composition of Antarctic macroalgae: a baseline for a combined biomarker approach in food web studies 南极大型藻类的脂肪酸谱和稳定同位素组成：食物网研究中综合生物标记方法的基线

IF 1.7 4区环境科学与生态学

Polar Biology Pub Date : 2024-03-26 DOI: 10.1007/s00300-024-03234-z

Ross Whippo, Katrin Iken, Charles D. Amsler, Alexander T. Lowe, Julie B. Schram, Andrew G. Klein, Sabrina Heiser, Margaret O. Amsler, James B. McClintock, Aaron W. E. Galloway

{"title":"Fatty acid profiles and stable isotope composition of Antarctic macroalgae: a baseline for a combined biomarker approach in food web studies","authors":"Ross Whippo, Katrin Iken, Charles D. Amsler, Alexander T. Lowe, Julie B. Schram, Andrew G. Klein, Sabrina Heiser, Margaret O. Amsler, James B. McClintock, Aaron W. E. Galloway","doi":"10.1007/s00300-024-03234-z","DOIUrl":"https://doi.org/10.1007/s00300-024-03234-z","url":null,"abstract":"The Western Antarctic Peninsula supports a diverse assemblage of > 100 described macroalgal species that contribute to the base of coastal food webs, but their contribution to local nearshore food webs is still uncertain across larger spatial scales. The analysis of biomarkers, specifically fatty acids and stable isotopes, offers a tool to clarify the trophic role of Antarctic macroalgae. The aim of this study was to describe the fatty acid profiles and stable isotope values of 31 algal species from three divisions (Chlorophyta—1, Ochrophyta—8, Rhodophyta—22) collected at the same sites for both biomarkers. Of these, 13 species had no previously published fatty acid profiles. Most species were rich in polyunsaturated fatty acids (PUFAs), suggesting they are highly nutritious and could be a resource of essential fatty acids for consumers. This was specifically noticeable in the overall low PUFA ratio (∑ω6/∑ω3 ratio), with low ratios being an indicator of high nutritional quality for consumers. Fatty acid profiles of macroalgae grouped strongly by phylogeny (at the levels of division, order, and family), while stable isotope groupings were more driven by the physiological properties of the species. Specifically, some closely related red algal species exhibited very different stable isotope values based on their carbon concentrating mechanisms, with highly 13C-depleted values in several Rhodophyta species. The fact that the two biomarker approaches created different groupings of Antarctic macroalgae collected at the same locations emphasizes that their combined application can be a powerful tool in Antarctic coastal food web studies.","PeriodicalId":20362,"journal":{"name":"Polar Biology","volume":"12 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140302209","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