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The northern Baltic Sea phytoplankton communities in 1903–1911 and 1993–2005: a comparison of historical and modern species data

Heidi Hällfors, Hermanni Backer, Juha-Markku Leppänen, Seija Hällfors, Guy Hällfors, Harri Kuosa
2013 Hydrobiologia  
Heidi Hällfors, Department of Environmental Sciences, University of Helsinki, P.O. Box 65, 00014 University of Helsinki, Finland, and Tvärminne Zoological Station, University of Helsinki, J.A.  ...  Hällfors & G. Hällfors (2007) off Helsinki.  ...  Hällfors 2004) .  ... 
doi:10.1007/s10750-012-1414-4 fatcat:hz3aef6khfadvm6e5usuy6q5j4

Price vs. Value of Marine Monitoring

Henrik Nygård, Soile Oinonen, Heidi A. Hällfors, Maiju Lehtiniemi, Eija Rantajärvi, Laura Uusitalo
2016 Frontiers in Marine Science  
Monitoring data facilitate the basic understanding of changes taking place in nature and provide information for making management decisions, but environmental monitoring is often considered expensive. Here, we apply the concept of value of information to evaluate the value of marine monitoring in the EU Marine Strategy Framework Directive context. We estimated the costs of the Finnish marine monitoring program and used the costs and economic benefits estimates of the Finnish marine strategy to
more » ... assess the value of environmental monitoring. The numbers were applied to scenarios with different levels of information available prior to management decision-making. Monitoring costs were related to the value of perfect information prior to the management decision, assuming that managers will choose the management option that maximizes the benefits. The underlying assumptions of the conceptual model are that more accurate information about the status facilitates the selection of an optimal set of measures to achieve the environmental objectives and the related welfare gains from the improved environmental status. Our results emphasize the fact that monitoring is an essential part of effective marine management. Importantly, our study show that the value of marine monitoring data is an order of magnitude greater than the resources currently spent on monitoring and that an improved knowledge base can facilitate the planning of more cost-effective measures.
doi:10.3389/fmars.2016.00205 fatcat:autodlrlpngahoffzpd3zco7k4

Phytoplankton Morpho-Functional Trait Variability along Coastal Environmental Gradients

Sirpa Lehtinen, Sanna Suikkanen, Heidi Hällfors, Jarno Tuimala, Harri Kuosa
2021 Microorganisms  
We utilized the trait-based approach in a novel way to examine how specific phytoplankton traits are related to physical features connected to global change, water quality features connected to catchment change, and nutrient availability connected to nutrient loading. For the analyses, we used summertime monitoring data originating from the coastal northern Baltic Sea and generalized additive mixed modeling (GAMM). Of the physical features connected to global climate change, temperature was the
more » ... most important affecting several studied traits. Nitrogen-fixing, buoyant, non-motile, and autotrophic phytoplankton, as well as harmful cyanobacteria, benefited from a higher temperature. Salinity and stratification did not have clear effects on the traits. Water transparency, which in the Baltic Sea is connected to catchment change, had a mostly negative relation to the studied traits. Harmfulness was negatively correlated with transparency, while the share of non-harmful and large-sized phytoplankton was positively related to it. We used nutrient loading source type and total phosphorus (TP) as proxies for nutrient availability connected to anthropogenic eutrophication. The nutrient loading source type did not relate to any of the traits. Our result showing that N-fixing was not related to TP is discussed. The regionality analysis demonstrated that traits should be calculated in both absolute terms (biomass) and proportions (share of total biomass) to get a better view of community changes and to potentially supplement the environmental status assessments.
doi:10.3390/microorganisms9122477 pmid:34946082 pmcid:PMC8708429 fatcat:mewvvtw57ndi3j2bd5jgrp2n3u

Comparison of Diatoms and Dinoflagellates from Different Habitats as Sources of PUFAs

Elina Peltomaa, Heidi Hällfors, Sami J. Taipale
2019 Marine Drugs  
Recent studies have clearly shown the importance of omega-3 (ω-3) and omega-6 (ω-6) polyunsaturated fatty acids (PUFAs) for human and animal health. The long-chain eicosapentaenoic acid (EPA; 20:5ω-3) and docosahexaenoic acid (DHA; 22:6ω-3) are especially recognized for their nutritional value, and ability to alleviate many diseases in humans. So far, fish oil has been the main human source of EPA and DHA, but alternative sources are needed to satisfy the growing need for them. Therefore, we
more » ... pared a fatty acid profile and content of 10 diatoms and seven dinoflagellates originating from marine, brackish and freshwater habitats. These two phytoplankton groups were chosen since they are excellent producers of EPA and DHA in aquatic food webs. Multivariate analysis revealed that, whereas the phytoplankton group (46%) explained most of the differences in the fatty acid profiles, habitat (31%) together with phytoplankton group (24%) explained differences in the fatty acid contents. In both diatoms and dinoflagellates, the total fatty acid concentrations and the ω-3 and ω-6 PUFAs were markedly higher in freshwater than in brackish or marine strains. Our results show that, even though the fatty acid profiles are genetically ordered, the fatty acid contents may vary greatly by habitat and affect the ω-3 and ω-6 availability in food webs.
doi:10.3390/md17040233 fatcat:sumjfl72s5eijg4xkv2fc2tssa

Approach for Supporting Food Web Assessments with Multi-Decadal Phytoplankton Community Analyses—Case Baltic Sea

Sirpa Lehtinen, Sanna Suikkanen, Heidi Hällfors, Pirkko Kauppila, Maiju Lehtiniemi, Jarno Tuimala, Laura Uusitalo, Harri Kuosa
2016 Frontiers in Marine Science  
doi:10.3389/fmars.2016.00220 fatcat:gfwvh3vstrbhhn4bq3qtdhursy

Optimising sampling frequency for monitoring heterotrophic protists in a marine ecosystem

Lehtiniemi Maiju, Fileman Elaine, Hällfors Heidi, Kuosa Harri, Lehtinen Sirpa, Lips Inga, Setälä Outi, Suikkanen Sanna, Tuimala Jarno, Widdicombe Claire, Brock Woodson
2021 ICES Journal of Marine Science  
., 2010; Hällfors et al., 2013; Suikkanen et al., 2013) . In addition, such data provide information on the potential spreading of introduced or invasive species (Lehtiniemi et al., 2015) .  ...  Seasonal changes in the ciliate and heterotrophic dinoflagellate communities may be rapid, and distinct seasonal species can be distinguished (Montagnes et al., 1988; Johansson et al., 2004; Hällfors  ... 
doi:10.1093/icesjms/fsab132 fatcat:qsu2xi3n6feydp36x52v2kw6ay

First Application of IFCB High-Frequency Imaging-in-Flow Cytometry to Investigate Bloom-Forming Filamentous Cyanobacteria in the Baltic Sea

Kaisa Kraft, Jukka Seppälä, Heidi Hällfors, Sanna Suikkanen, Pasi Ylöstalo, Sílvia Anglès, Sami Kielosto, Harri Kuosa, Lauri Laakso, Martti Honkanen, Sirpa Lehtinen, Johanna Oja (+1 others)
2021 Frontiers in Marine Science  
., , 2013;; Hällfors et al., 2013) . However, analyzing a single sample can require a full working day of a highly skilled specialist.  ... 
doi:10.3389/fmars.2021.594144 fatcat:m4nxyvu4sfgmjj4ayytsk3cavi

Finnish high school students' and university students' ability to handle multiple source documents in History

Jukka Rantala, Marko van den Berg
2015 Historical Encounters: A Journal of Historical Consciousness, Historical Cultures, and History Education  
With the exception of Heidi (F), all the university students in this category considered the memoirs to be the most reliable source.  ...  The participants started by reading the extract from Lydia Hällfors' memoirs. Lydia Hällfors was a daughter of a clergyman and her autobiographical work was published in 1924.  ... 
doaj:f1b40e5f865b4a759c2e0b2ddc206364 fatcat:gdnmo7cbjrgddltssulld6oxce

Page 3115 of Psychological Abstracts Vol. 93, Issue 8 [page]

2006 Psychological Abstracts  
., 23308 Griffin, Melissa Joy, 23305 haLevi, Heidi, 22408 Hasbrouck, La Mar, 22424 Griffin, W. C. II, 22277 Halford, Susan, 22689 Hasegawa, Osamu, 24503 Griffiths, Helen, 21852 Hall.  ...  Stefan. 22254 Hathaway, Donna, 21616 Groholt, Berit, 22570 Hallfors, Denise, 23102 Hatsukami, Dorothy K., 23550 Groner, Yoram, 22198 Hallschmid, Manfred, 22276 Hattox, Alexis M., 22219 Groot, Wim, 23855  ... 

Page 4486 of Psychological Abstracts Vol. 89, Issue 11 [page]

2002 Psychological Abstracts  
M., 32119 Hamilton, Heidi E., 34129 Hamilton, Kate E., 33836 Hamilton, Margaret, 34354 Hamilton, Mimi, 34221 Hamlin, Constance, 33360 Hammarstrém, A., 33177 Hammen, Constance 55 3759 32860 Hammond, Geoffrey  ...  ., 34205 Hallam, Telia, 34649 Hallfors, Denise, 32037 Halligan, Sarah ge 33: Hallman, Jarmila, 343 Hallman, Tina, 3 3 360 Hallschmid, M., 3253 Halmi, Katherine, 335 66, Halpern, Diane F., 32252 Halpern-Felsher  ... 

Drift-ice and under-ice water communities in the Gulf of Bothnia (Baltic Sea)

Janne-Markus Rintala, Jonna Piiparinen, Jari Uusikivi
2009 Polar Biology  
Therefore, I sincerely want to thank Heidi Hällfors, Markus Majaneva and Jaanika Blomster, who have become something that I really feel are my own team, where each person has his/her of own brand of special  ...  Hällfors ssp. nov.  ... 
doi:10.1007/s00300-009-0695-1 fatcat:pthixmwlezb65ljbfcxwm7i77u

Has Adolescent Suicidality Decreased in the United States? Data From Two National Samples of Adolescents Interviewed in 1995 and 2005

Kate B. Wolitzky-Taylor, Kenneth J. Ruggiero, Michael R. McCart, Daniel W. Smith, Rochelle F. Hanson, Heidi S. Resnick, Michael A. de Arellano, Benjamin E. Saunders, Dean G. Kilpatrick
2009 Journal of Clinical Child & Adolescent Psychology  
) , fighting (King et al., 2001) , smoking cigarettes (Hallfors et al., 2004; King et al., 2001) , and sexual activity (Hallfors et al., 2004; King et al., 2001) .  ...  ., 1991; Hallfors et al., 2004; Swahn & Bossarte, 2007) , marijuana and other illicit drug use (Borowsky, Ireland, & Resnick, 2001; King et al., 2001) , carrying a gun to school (Borowsky et al., 2001  ... 
doi:10.1080/15374410903401146 pmid:20390799 pmcid:PMC3124114 fatcat:wag7wozmzbfa3ac4ttu5ietslm

Page 1289 of Psychological Abstracts Vol. 81, Issue Index [page]

Psychological Abstracts  
.— See Gauci, M. 41761 Saxarra, Heidi— See Gauci, Maryann 21990 Saxe, Geoffrey B. Studying children’s learning in context: Problems and prospects.  ...  Journal of the Learning Sciences, 1992, Vol 2(2), 215-234. 1211 Saxe, Leonard— See Cross, Theodore P. 90 Saxe, Leonard— See Hallfors, Denise D. 10704 Saxena, B. M.— See Bakish, David 26653 Saxena, B.  ... 

Page 128 of Psychological Abstracts Vol. 89, Issue Author Index [page]

Psychological Abstracts  
., 19765 Hallfors, Denise, 21993, 32037 Halli, Shiva S., 36438, 36439 Halliday, G.  ...  Hamagami, Fumiaki, 7433 Hamaguchi, Yuka, 13395 Hamaker, Ellen L., 32122 Hiamiiliinen, H., 30633 Hiamiilainen, Heikki, 19944 Him nen, Juha, 5585 Hiamiilainen, Raimo P., 7800 Hamanaka, Kenji, 20892 Hamann, Heidi  ... 

Page 969 of Bibliography of Agriculture. Annual Cumulative Indexes Vol. 47, Issue SUPPLEMENT [page]

Bibliography of Agriculture. Annual Cumulative Indexes  
Jr. 143946 Gyurjan, I. 12844 oe 119961. 161440 H. 131911 ~~ 148931, 148932, 151949 Haaker, H. 139332 Haaksma, J. 169178 ee K. 147576 M.A. 147804, Heidi, 158287, 159046 Haaland, RL. 120466, 120467, 120468  ...  171194 Hallet, A. 138952 Halley, 3. 158519 Halley, J.T. 15851 Halley, L. 157354 Hallford, D. 147043, 161213 Hallford, D.M. 146892, 147577, 147581, 147582, 147758, 147760, 149719, 150322, 150335, 150603 Hallfors  ... 
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