Ocean Acidification-Induced Food Quality Deterioration Constrains Trophic Transfer
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{"title"=>"Ocean acidification-induced food quality deterioration constrains trophic transfer", "type"=>"journal", "authors"=>[{"first_name"=>"Dennis", "last_name"=>"Rossoll", "scopus_author_id"=>"55180710700"}, {"first_name"=>"Rafael", "last_name"=>"Bermúdez", "scopus_author_id"=>"55180776800"}, {"first_name"=>"Helena", "last_name"=>"Hauss", "scopus_author_id"=>"35114971600"}, {"first_name"=>"Kai G.", "last_name"=>"Schulz", "scopus_author_id"=>"55458070800"}, {"first_name"=>"Ulf", "last_name"=>"Riebesell", "scopus_author_id"=>"7004763337"}, {"first_name"=>"Ulrich", "last_name"=>"Sommer", "scopus_author_id"=>"7006045303"}, {"first_name"=>"Monika", "last_name"=>"Winder", "scopus_author_id"=>"6603887949"}], "year"=>2012, "source"=>"PLoS ONE", "identifiers"=>{"sgr"=>"84859602326", "pmid"=>"22509351", "isbn"=>"1932-6203", "scopus"=>"2-s2.0-84859602326", "issn"=>"19326203", "pui"=>"364606662", "doi"=>"10.1371/journal.pone.0034737"}, "id"=>"2682eb59-a505-3e09-8ea9-d35ae97253c8", "abstract"=>"Our present understanding of ocean acidification (OA) impacts on marine organisms caused by rapidly rising atmospheric carbon dioxide (CO(2)) concentration is almost entirely limited to single species responses. OA consequences for food web interactions are, however, still unknown. Indirect OA effects can be expected for consumers by changing the nutritional quality of their prey. We used a laboratory experiment to test potential OA effects on algal fatty acid (FA) composition and resulting copepod growth. We show that elevated CO(2) significantly changed the FA concentration and composition of the diatom Thalassiosira pseudonana, which constrained growth and reproduction of the copepod Acartia tonsa. A significant decline in both total FAs (28.1 to 17.4 fg cell(-1)) and the ratio of long-chain polyunsaturated to saturated fatty acids (PUFA:SFA) of food algae cultured under elevated (750 µatm) compared to present day (380 µatm) pCO(2) was directly translated to copepods. The proportion of total essential FAs declined almost tenfold in copepods and the contribution of saturated fatty acids (SFAs) tripled at high CO(2). This rapid and reversible CO(2)-dependent shift in FA concentration and composition caused a decrease in both copepod somatic growth and egg production from 34 to 5 eggs female(-1) day(-1). Because the diatom-copepod link supports some of the most productive ecosystems in the world, our study demonstrates that OA can have far-reaching consequences for ocean food webs by changing the nutritional quality of essential macromolecules in primary producers that cascade up the food web.", "link"=>"http://www.mendeley.com/research/ocean-acidificationinduced-food-quality-deterioration-constrains-trophic-transfer", "reader_count"=>222, "reader_count_by_academic_status"=>{"Unspecified"=>7, "Professor > Associate Professor"=>2, "Librarian"=>2, "Researcher"=>41, "Student > Doctoral Student"=>12, "Student > Ph. D. Student"=>59, "Student > Postgraduate"=>8, "Student > Master"=>47, "Other"=>10, "Student > Bachelor"=>23, "Lecturer"=>2, "Lecturer > Senior Lecturer"=>2, "Professor"=>7}, "reader_count_by_user_role"=>{"Unspecified"=>7, "Professor > Associate Professor"=>2, "Librarian"=>2, "Researcher"=>41, "Student > Doctoral Student"=>12, "Student > Ph. D. Student"=>59, "Student > Postgraduate"=>8, "Student > Master"=>47, "Other"=>10, "Student > Bachelor"=>23, "Lecturer"=>2, "Lecturer > Senior Lecturer"=>2, "Professor"=>7}, "reader_count_by_subject_area"=>{"Unspecified"=>15, "Agricultural and Biological Sciences"=>132, "Chemistry"=>1, "Earth and Planetary Sciences"=>19, "Economics, Econometrics and Finance"=>1, "Engineering"=>2, "Environmental Science"=>43, "Biochemistry, Genetics and Molecular Biology"=>2, "Nursing and Health Professions"=>2, "Materials Science"=>1, "Medicine and Dentistry"=>1, "Social Sciences"=>2, "Immunology and Microbiology"=>1}, "reader_count_by_subdiscipline"=>{"Materials Science"=>{"Materials Science"=>1}, "Medicine and Dentistry"=>{"Medicine and Dentistry"=>1}, "Social Sciences"=>{"Social Sciences"=>2}, "Unspecified"=>{"Unspecified"=>15}, "Environmental Science"=>{"Environmental Science"=>43}, "Engineering"=>{"Engineering"=>2}, "Chemistry"=>{"Chemistry"=>1}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>19}, "Economics, Econometrics and Finance"=>{"Economics, Econometrics and Finance"=>1}, "Immunology and Microbiology"=>{"Immunology and Microbiology"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>132}, "Nursing and Health Professions"=>{"Nursing and Health Professions"=>2}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>2}}, "reader_count_by_country"=>{"Canada"=>2, "Sweden"=>1, "Belgium"=>2, "United States"=>7, "Brazil"=>2, "Denmark"=>1, "United Kingdom"=>3, "Italy"=>1, "France"=>1, "Peru"=>1, "Germany"=>4, "Spain"=>1}, "group_count"=>10}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/655606"], "description"=>"<p><b>A</b>) Percentage of polyunsaturated (PUFA), monounsaturated (MUFA), and saturated (SFA) fatty acids relative to total fatty acids during the exponential growth phase cultured at low (realized value of 365 µatm <i>p</i>CO<sub>2</sub>, n = 5) and high (realized value of 915 µatm <i>p</i>CO<sub>2</sub>, n = 3) CO<sub>2</sub> treatments used as copepod food source. <b>B</b>) Change in the fatty acid composition in <i>T. pseudonana</i> after a shift from high to low <i>p</i>CO<sub>2</sub> conditions (n = 1 per treatment level). Time 0 are measured values before the culture media shift. Error bars indicate standard errors.</p>", "links"=>[], "tags"=>["cultured"], "article_id"=>326093, "categories"=>["Biochemistry", "Ecology"], "users"=>["Dennis Rossoll", "Rafael Bermúdez", "Helena Hauss", "Kai G. Schulz", "Ulf Riebesell", "Ulrich Sommer", "Monika Winder"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0034737.g001", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Fatty_acid_composition_and_concentration_of_Thalassiorira_pseudonana_cultured_at_different_CO_2_treatments_/326093", "title"=>"Fatty acid composition and concentration of <i>Thalassiorira pseudonana</i> cultured at different CO<sub>2</sub> treatments.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-04-11 01:41:33"}
  • {"files"=>["https://ndownloader.figshare.com/files/655681"], "description"=>"<p><b>A</b>) Percentage of polyunsaturated (PUFA), monounsaturated (MUFA), and saturated (SFA) fatty acids relative to total fatty acids in female copepods. <b>B</b>) Principal component analysis (PCA) of fatty acid composition for the dietary algae <i>Thalassiorira pseudonana</i> and <i>A. tonsa</i> of the different treatment combinations. PCA scores 1 explained 40% of the variability (see <i>x</i>-axis of c) and was highly negatively correlated with 22:6<i>n</i>-3 (r<sup>2</sup> = 0.73), 20:4<i>n</i>-6+20:5<i>n</i>-3 (r<sup>2</sup> = 0.85), 18:3<i>n</i>-6 (r<sup>2</sup> = 0.73) and 16:1 (r<sup>2</sup> = 0.79), and positively with 22:1<i>n</i>-9 (r<sup>2</sup> = 0.25) and 18:1<i>n</i>-9<i>t</i> (r<sup>2</sup> = 0.57). PCA score 2 explained 17% of the overall variability (see <i>y</i>-axis of c) and was strongest positively correlated with 24:0 (r<sup>2</sup> = 0.84). Loadings of the PC scores are shown in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0034737#pone.0034737.s002\" target=\"_blank\">Figure S2</a>). <b>C</b>) Stage distribution of <i>A. tonsa</i> individuals at day 10. C4, C5, C6 = copepodite stage 4, 5, and adult, respectively. <b>D</b>) Egg production rate (EPR) of incubated females (n = 12 per treatment level). EPR was significantly different between treatments (F<sub>(3, 44)</sub> = 18.02, <i>p</i><0.001). Different letters above bars represent significant differences from a Tukey HSD test. The bars represent the 25<sup>th</sup>, 50<sup>th</sup> and 75<sup>th</sup> percentiles, whiskers stand for the 10<sup>th</sup> and the 90<sup>th</sup> percentiles and black points show outliers. Legend refers to treatment combinations of copepod zooplankton (Z) and phytoplankton food source (P) at low (L) and high (H) <i>p</i>CO<sub>2</sub>.</p>", "links"=>[], "tags"=>["somatic", "reproduction"], "article_id"=>326174, "categories"=>["Biochemistry", "Ecology"], "users"=>["Dennis Rossoll", "Rafael Bermúdez", "Helena Hauss", "Kai G. Schulz", "Ulf Riebesell", "Ulrich Sommer", "Monika Winder"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0034737.g002", "stats"=>{"downloads"=>1, "page_views"=>20, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Fatty_acid_composition_somatic_growth_and_reproduction_of_Acartia_tonsa_across_CO_2_treatment_combinations_/326174", "title"=>"Fatty acid composition, somatic growth and reproduction of <i>Acartia tonsa</i> across CO<sub>2</sub> treatment combinations.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2012-04-11 01:42:54"}
  • {"files"=>["https://ndownloader.figshare.com/files/336833", "https://ndownloader.figshare.com/files/336991", "https://ndownloader.figshare.com/files/337037", "https://ndownloader.figshare.com/files/337157"], "description"=>"<div><p>Our present understanding of ocean acidification (OA) impacts on marine organisms caused by rapidly rising atmospheric carbon dioxide (CO<sub>2</sub>) concentration is almost entirely limited to single species responses. OA consequences for food web interactions are, however, still unknown. Indirect OA effects can be expected for consumers by changing the nutritional quality of their prey. We used a laboratory experiment to test potential OA effects on algal fatty acid (FA) composition and resulting copepod growth. We show that elevated CO<sub>2</sub> significantly changed the FA concentration and composition of the diatom <em>Thalassiosira pseudonana</em>, which constrained growth and reproduction of the copepod <em>Acartia tonsa</em>. A significant decline in both total FAs (28.1 to 17.4 fg cell<sup>−1</sup>) and the ratio of long-chain polyunsaturated to saturated fatty acids (PUFA:SFA) of food algae cultured under elevated (750 µatm) compared to present day (380 µatm) <em>p</em>CO<sub>2</sub> was directly translated to copepods. The proportion of total essential FAs declined almost tenfold in copepods and the contribution of saturated fatty acids (SFAs) tripled at high CO<sub>2</sub>. This rapid and reversible CO<sub>2</sub>-dependent shift in FA concentration and composition caused a decrease in both copepod somatic growth and egg production from 34 to 5 eggs female<sup>−1</sup> day<sup>−1</sup>. Because the diatom-copepod link supports some of the most productive ecosystems in the world, our study demonstrates that OA can have far-reaching consequences for ocean food webs by changing the nutritional quality of essential macromolecules in primary producers that cascade up the food web.</p> </div>", "links"=>[], "tags"=>["acidification-induced", "deterioration", "constrains", "trophic"], "article_id"=>126561, "categories"=>["Ecology", "Biochemistry"], "users"=>["Dennis Rossoll", "Rafael Bermúdez", "Helena Hauss", "Kai G. Schulz", "Ulf Riebesell", "Ulrich Sommer", "Monika Winder"], "doi"=>[nil, nil, nil, nil], "stats"=>{"downloads"=>22, "page_views"=>10, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Ocean_Acidification_Induced_Food_Quality_Deterioration_Constrains_Trophic_Transfer/126561", "title"=>"Ocean Acidification-Induced Food Quality Deterioration Constrains Trophic Transfer", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2012-04-11 01:49:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/655776"], "description"=>"<p>Bonferroni-corrected significance levels for multiple fatty acid comparisons were α = 0.008 (0.05/6). Significant correlations are highlighted in bold; n = 11. PUFA = polyunsaturated fatty acid; MUFA = monounsaturated fatty acid; SFA = saturated fatty acid; ARA-EPA = 20:5<i>n</i>3; DHA = docosahexaenoic acid (22:6<i>n</i>3).</p>", "links"=>[], "tags"=>["linear", "fatty"], "article_id"=>326271, "categories"=>["Biochemistry", "Ecology"], "users"=>["Dennis Rossoll", "Rafael Bermúdez", "Helena Hauss", "Kai G. Schulz", "Ulf Riebesell", "Ulrich Sommer", "Monika Winder"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0034737.t001", "stats"=>{"downloads"=>1, "page_views"=>39, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Regression_statistics_of_Acartia_tonsa_egg_production_as_a_linear_function_of_fatty_acid_composition_/326271", "title"=>"Regression statistics of <i>Acartia tonsa</i> egg production as a linear function of fatty acid composition.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2012-04-11 01:44:31"}

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Relative Metric

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