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{"title"=>"Assessing the utility of hydrogen, carbon and nitrogen stable isotopes in estimating consumer allochthony in two shallow eutrophic lakes", "type"=>"journal", "authors"=>[{"first_name"=>"Jari", "last_name"=>"Syv�ranta", "scopus_author_id"=>"57201175249"}, {"first_name"=>"Kristin", "last_name"=>"Scharnweber", "scopus_author_id"=>"35119359800"}, {"first_name"=>"Mario", "last_name"=>"Brauns", "scopus_author_id"=>"13908198600"}, {"first_name"=>"Sabine", "last_name"=>"Hilt", "scopus_author_id"=>"14420979100"}, {"first_name"=>"Thomas", "last_name"=>"Mehner", "scopus_author_id"=>"7003277799"}], "year"=>2016, "source"=>"PLoS ONE", "identifiers"=>{"scopus"=>"2-s2.0-84969822904", "sgr"=>"84969822904", "issn"=>"19326203", "doi"=>"10.1371/journal.pone.0155562", "pmid"=>"27167517", "isbn"=>"1932-6203", "pui"=>"610398112"}, "id"=>"17e2f5e0-0351-3d74-9733-52f0c1995535", "abstract"=>"Hydrogen stable isotopes (δ2H) have recently been used to complement δ13C and δ15Nin food web studies due to their potentially greater power to separate sources of organic mat- ter in aquatic food webs. However, uncertainties remain regarding the use of δ2H, since little is known about the potential variation in the amount of exchangeable hydrogen (Hex) among common sample materials or the patterns of δ2H when entire food webs are consid- ered.We assessed differences in Hex among the typical sample materials in freshwater studies and used δ2H, δ13C and δ15N to compare their effectiveness in tracing allochtho- nous matter in food webs of two small temperate lakes. Our results showed higher average amounts of Hex in animal tissues (27% in fish and macroinvertebrates, 19% in zooplankton) compared to most plant material (15% in terrestrial plants and 8% in seston/periphyton), with the exception of aquatic vascular plants (23%, referred to as macrophytes). The amount of Hex correlated strongly with sample lipid content (inferred from C:N ratios) in fish and zooplankton samples. Overall, the three isotopes provided good separation of sources (seston, periphyton, macrophytes and allochthonous organic matter), particularly the δ2H followed by δ13C. Aquatic macrophytes revealed unexpectedly high δ2H values, having more elevated δ2H values than terrestrial organic matter with direct implications for estimat- ing consumer allochthony. Organic matter from macrophytes significantly contributed to the food webs in both lakes highlighting the need to include macrophytes as a potential source when using stable isotopes to estimate trophic structures and contributions from allochtho- nous sources.", "link"=>"http://www.mendeley.com/research/assessing-utility-hydrogen-carbon-nitrogen-stable-isotopes-estimating-consumer-allochthony-two-shall-1", "reader_count"=>31, "reader_count_by_academic_status"=>{"Unspecified"=>2, "Professor > Associate Professor"=>1, "Student > Doctoral Student"=>4, "Researcher"=>7, "Student > Ph. D. Student"=>4, "Student > Postgraduate"=>1, "Student > Master"=>8, "Other"=>1, "Student > Bachelor"=>1, "Professor"=>2}, "reader_count_by_user_role"=>{"Unspecified"=>2, "Professor > Associate Professor"=>1, "Student > Doctoral Student"=>4, "Researcher"=>7, "Student > Ph. D. Student"=>4, "Student > Postgraduate"=>1, "Student > Master"=>8, "Other"=>1, "Student > Bachelor"=>1, "Professor"=>2}, "reader_count_by_subject_area"=>{"Unspecified"=>3, "Environmental Science"=>16, "Agricultural and Biological Sciences"=>9, "Arts and Humanities"=>1, "Chemistry"=>1, "Earth and Planetary Sciences"=>1}, "reader_count_by_subdiscipline"=>{"Chemistry"=>{"Chemistry"=>1}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>9}, "Unspecified"=>{"Unspecified"=>3}, "Environmental Science"=>{"Environmental Science"=>16}, "Arts and Humanities"=>{"Arts and Humanities"=>1}}, "reader_count_by_country"=>{"Netherlands"=>1, "Brazil"=>1, "Mexico"=>1}, "group_count"=>1}

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• http://doi.org/10.1002/ecy.2347
• http://doi.org/10.1111/fwb.12979
• http://doi.org/10.1002/ecy.2211
• http://doi.org/10.1002/eap.1889
• http://doi.org/10.1080/14614103.2018.1444695
• http://doi.org/10.1007/s10452-018-9662-7
• http://doi.org/10.1002/ece3.5594

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• {"id"=>"730453997132226560", "text"=>"Assessing the Utility of Hydrogen, Carbon and Nitrogen Stable Isotopes in Estimating Consumer Allochthony in ... https://t.co/wLkUErSvud", "created_at"=>"2016-05-11T17:46:18Z", "user"=>"TestAllPLoSRSS", "user_name"=>"TestAllPLoSRSS", "user_profile_image"=>"http://abs.twimg.com/sticky/default_profile_images/default_profile_0_normal.png"}
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Figshare

• {"files"=>["https://ndownloader.figshare.com/files/5223904"], "description"=>"<p>The figures illustrate sufficient separation but considerable overlap in δ¹³C and δ¹⁵N values among the sources in both lakes.</p>", "links"=>[], "tags"=>["seston", "δ 15 N", "source", "estimate trophic structures", "allochthonou", "sample lipid content", "Shallow Eutrophic Lakes Hydrogen", "isotope", "food webs", "sample materials", "δ 2 H values", "macrophyte", "complement δ 13 C", "Nitrogen Stable Isotopes", "δ 13 C", "δ 2 H", "matter", "zooplankton", "food web studies"], "article_id"=>3378880, "categories"=>["Biochemistry", "Molecular Biology", "Biotechnology", "Evolutionary Biology", "Environmental Sciences not elsewhere classified", "Chemical Sciences not elsewhere classified", "Ecology", "Biological Sciences not elsewhere classified", "Inorganic Chemistry"], "users"=>["Jari Syväranta", "Kristin Scharnweber", "Mario Brauns", "Sabine Hilt", "Thomas Mehner"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0155562.g002", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Isotope_biplots_of_sup_13_sup_C_and_sup_15_sup_N_values_of_the_food_webs_in_Gollinsee_upper_panel_and_Schulzensee_lower_panel_/3378880", "title"=>"Isotope biplots of δ¹³C and δ¹⁵N values of the food webs in Gollinsee (upper panel) and Schulzensee (lower panel).", "pos_in_sequence"=>3, "defined_type"=>1, "published_date"=>"2016-05-11 05:51:04"}
• {"files"=>["https://ndownloader.figshare.com/files/5223907"], "description"=>"<p>H and C isotopes reveal a distinct separation of sources in both lakes and the typical pattern of low and identical δ²H values in pelagic and littoral algal production, higher δ²H values in terrestrial organic matter but the highest δ²H values in aquatic macrophytes.</p>", "links"=>[], "tags"=>["seston", "δ 15 N", "source", "estimate trophic structures", "allochthonou", "sample lipid content", "Shallow Eutrophic Lakes Hydrogen", "isotope", "food webs", "sample materials", "δ 2 H values", "macrophyte", "complement δ 13 C", "Nitrogen Stable Isotopes", "δ 13 C", "δ 2 H", "matter", "zooplankton", "food web studies"], "article_id"=>3378883, "categories"=>["Biochemistry", "Molecular Biology", "Biotechnology", "Evolutionary Biology", "Environmental Sciences not elsewhere classified", "Chemical Sciences not elsewhere classified", "Ecology", "Biological Sciences not elsewhere classified", "Inorganic Chemistry"], "users"=>["Jari Syväranta", "Kristin Scharnweber", "Mario Brauns", "Sabine Hilt", "Thomas Mehner"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0155562.g003", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Isotope_biplots_of_sup_2_sup_H_and_sup_13_sup_C_values_of_the_food_webs_in_Gollinsee_and_Schulzensee_/3378883", "title"=>"Isotope biplots of δ²H and δ¹³C values of the food webs in Gollinsee and Schulzensee.", "pos_in_sequence"=>4, "defined_type"=>1, "published_date"=>"2016-05-11 05:51:04"}
• {"files"=>["https://ndownloader.figshare.com/files/5223913"], "description"=>"<p>Models used either δ¹³C and δ¹⁵N values or δ¹³C, δ¹⁵N and δ²H values (CN and HCN methods, upper panel) or a HCN mixing model with either macrophytes excluded from the model (y-axis, -macrophytes) or macrophytes included (x-axis, +macrophytes) to estimate consumer allochthony. The lines indicate a 1:1 fit. More detailed values with uncertainties are provided in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0155562#pone.0155562.t002\" target=\"_blank\">Table 2</a>.</p>", "links"=>[], "tags"=>["seston", "δ 15 N", "source", "estimate trophic structures", "allochthonou", "sample lipid content", "Shallow Eutrophic Lakes Hydrogen", "isotope", "food webs", "sample materials", "δ 2 H values", "macrophyte", "complement δ 13 C", "Nitrogen Stable Isotopes", "δ 13 C", "δ 2 H", "matter", "zooplankton", "food web studies"], "article_id"=>3378889, "categories"=>["Biochemistry", "Molecular Biology", "Biotechnology", "Evolutionary Biology", "Environmental Sciences not elsewhere classified", "Chemical Sciences not elsewhere classified", "Ecology", "Biological Sciences not elsewhere classified", "Inorganic Chemistry"], "users"=>["Jari Syväranta", "Kristin Scharnweber", "Mario Brauns", "Sabine Hilt", "Thomas Mehner"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0155562.g004", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/A_comparison_of_consumer_allochthony_values_from_different_models_/3378889", "title"=>"A comparison of consumer allochthony values from different models.", "pos_in_sequence"=>5, "defined_type"=>1, "published_date"=>"2016-05-11 05:51:04"}
• {"files"=>["https://ndownloader.figshare.com/files/5223922"], "description"=>"<p>Fraction of <i>H</i>_<i>ex</i> in different sample types.</p>", "links"=>[], "tags"=>["seston", "δ 15 N", "source", "estimate trophic structures", "allochthonou", "sample lipid content", "Shallow Eutrophic Lakes Hydrogen", "isotope", "food webs", "sample materials", "δ 2 H values", "macrophyte", "complement δ 13 C", "Nitrogen Stable Isotopes", "δ 13 C", "δ 2 H", "matter", "zooplankton", "food web studies"], "article_id"=>3378895, "categories"=>["Biochemistry", "Molecular Biology", "Biotechnology", "Evolutionary Biology", "Environmental Sciences not elsewhere classified", "Chemical Sciences not elsewhere classified", "Ecology", "Biological Sciences not elsewhere classified", "Inorganic Chemistry"], "users"=>["Jari Syväranta", "Kristin Scharnweber", "Mario Brauns", "Sabine Hilt", "Thomas Mehner"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0155562.t001", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Fraction_of_i_H_i_sub_i_ex_i_sub_in_different_sample_types_/3378895", "title"=>"Fraction of <i>H</i>_<i>ex</i> in different sample types.", "pos_in_sequence"=>6, "defined_type"=>3, "published_date"=>"2016-05-11 05:51:04"}
• {"files"=>["https://ndownloader.figshare.com/files/5223934"], "description"=>"<p>Mean allo-om contributions to consumers in Gollinsee and Schulzensee.</p>", "links"=>[], "tags"=>["seston", "δ 15 N", "source", "estimate trophic structures", "allochthonou", "sample lipid content", "Shallow Eutrophic Lakes Hydrogen", "isotope", "food webs", "sample materials", "δ 2 H values", "macrophyte", "complement δ 13 C", "Nitrogen Stable Isotopes", "δ 13 C", "δ 2 H", "matter", "zooplankton", "food web studies"], "article_id"=>3378898, "categories"=>["Biochemistry", "Molecular Biology", "Biotechnology", "Evolutionary Biology", "Environmental Sciences not elsewhere classified", "Chemical Sciences not elsewhere classified", "Ecology", "Biological Sciences not elsewhere classified", "Inorganic Chemistry"], "users"=>["Jari Syväranta", "Kristin Scharnweber", "Mario Brauns", "Sabine Hilt", "Thomas Mehner"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0155562.t002", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Mean_allo-om_contributions_to_consumers_in_Gollinsee_and_Schulzensee_/3378898", "title"=>"Mean allo-om contributions to consumers in Gollinsee and Schulzensee.", "pos_in_sequence"=>7, "defined_type"=>3, "published_date"=>"2016-05-11 05:51:04"}
• {"files"=>["https://ndownloader.figshare.com/files/5223889", "https://ndownloader.figshare.com/files/5223892"], "description"=>"<div><p>Hydrogen stable isotopes (δ²H) have recently been used to complement δ¹³C and δ¹⁵N in food web studies due to their potentially greater power to separate sources of organic matter in aquatic food webs. However, uncertainties remain regarding the use of δ²H, since little is known about the potential variation in the amount of exchangeable hydrogen (<i>H</i>_<i>ex</i>) among common sample materials or the patterns of δ²H when entire food webs are considered. We assessed differences in <i>H</i>_<i>ex</i> among the typical sample materials in freshwater studies and used δ²H, δ¹³C and δ¹⁵N to compare their effectiveness in tracing allochthonous matter in food webs of two small temperate lakes. Our results showed higher average amounts of <i>H</i>_<i>ex</i> in animal tissues (27% in fish and macroinvertebrates, 19% in zooplankton) compared to most plant material (15% in terrestrial plants and 8% in seston/periphyton), with the exception of aquatic vascular plants (23%, referred to as macrophytes). The amount of <i>H</i>_<i>ex</i> correlated strongly with sample lipid content (inferred from C:N ratios) in fish and zooplankton samples. Overall, the three isotopes provided good separation of sources (seston, periphyton, macrophytes and allochthonous organic matter), particularly the δ²H followed by δ¹³C. Aquatic macrophytes revealed unexpectedly high δ²H values, having more elevated δ²H values than terrestrial organic matter with direct implications for estimating consumer allochthony. Organic matter from macrophytes significantly contributed to the food webs in both lakes highlighting the need to include macrophytes as a potential source when using stable isotopes to estimate trophic structures and contributions from allochthonous sources.</p></div>", "links"=>[], "tags"=>["seston", "δ 15 N", "source", "estimate trophic structures", "allochthonou", "sample lipid content", "Shallow Eutrophic Lakes Hydrogen", "isotope", "food webs", "sample materials", "δ 2 H values", "macrophyte", "complement δ 13 C", "Nitrogen Stable Isotopes", "δ 13 C", "δ 2 H", "matter", "zooplankton", "food web studies"], "article_id"=>3378868, "categories"=>["Biochemistry", "Molecular Biology", "Biotechnology", "Evolutionary Biology", "Environmental Sciences not elsewhere classified", "Chemical Sciences not elsewhere classified", "Ecology", "Biological Sciences not elsewhere classified", "Inorganic Chemistry"], "users"=>["Jari Syväranta", "Kristin Scharnweber", "Mario Brauns", "Sabine Hilt", "Thomas Mehner"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0155562.s001", "https://dx.doi.org/10.1371/journal.pone.0155562.s002"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Assessing_the_Utility_of_Hydrogen_Carbon_and_Nitrogen_Stable_Isotopes_in_Estimating_Consumer_Allochthony_in_Two_Shallow_Eutrophic_Lakes/3378868", "title"=>"Assessing the Utility of Hydrogen, Carbon and Nitrogen Stable Isotopes in Estimating Consumer Allochthony in Two Shallow Eutrophic Lakes", "pos_in_sequence"=>1, "defined_type"=>4, "published_date"=>"2016-05-11 05:51:04"}
• {"files"=>["https://ndownloader.figshare.com/files/5223940"], "description"=>"<p>Potential influence of changing δ²H in air moisture on δ²H values in a sample with variable <i>H</i>_<i>ex</i>.</p>", "links"=>[], "tags"=>["seston", "δ 15 N", "source", "estimate trophic structures", "allochthonou", "sample lipid content", "Shallow Eutrophic Lakes Hydrogen", "isotope", "food webs", "sample materials", "δ 2 H values", "macrophyte", "complement δ 13 C", "Nitrogen Stable Isotopes", "δ 13 C", "δ 2 H", "matter", "zooplankton", "food web studies"], "article_id"=>3378904, "categories"=>["Biochemistry", "Molecular Biology", "Biotechnology", "Evolutionary Biology", "Environmental Sciences not elsewhere classified", "Chemical Sciences not elsewhere classified", "Ecology", "Biological Sciences not elsewhere classified", "Inorganic Chemistry"], "users"=>["Jari Syväranta", "Kristin Scharnweber", "Mario Brauns", "Sabine Hilt", "Thomas Mehner"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0155562.t003", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Potential_influence_of_changing_sup_2_sup_H_in_air_moisture_on_sup_2_sup_H_values_in_a_sample_with_variable_i_H_i_sub_i_ex_i_sub_/3378904", "title"=>"Potential influence of changing δ²H in air moisture on δ²H values in a sample with variable <i>H</i>_<i>ex</i>.", "pos_in_sequence"=>8, "defined_type"=>3, "published_date"=>"2016-05-11 05:51:04"}
• {"files"=>["https://ndownloader.figshare.com/files/5223895"], "description"=>"<p>Relationship between the fraction of exchangeable H (<i>H</i>_<i>ex</i>) (0−1) and the C:N ratios (as proxy for lipid content) in sample materials. Values for Pearson’s correlation coefficients and p-values are given in each corresponding panel.</p>", "links"=>[], "tags"=>["seston", "δ 15 N", "source", "estimate trophic structures", "allochthonou", "sample lipid content", "Shallow Eutrophic Lakes Hydrogen", "isotope", "food webs", "sample materials", "δ 2 H values", "macrophyte", "complement δ 13 C", "Nitrogen Stable Isotopes", "δ 13 C", "δ 2 H", "matter", "zooplankton", "food web studies"], "article_id"=>3378877, "categories"=>["Biochemistry", "Molecular Biology", "Biotechnology", "Evolutionary Biology", "Environmental Sciences not elsewhere classified", "Chemical Sciences not elsewhere classified", "Ecology", "Biological Sciences not elsewhere classified", "Inorganic Chemistry"], "users"=>["Jari Syväranta", "Kristin Scharnweber", "Mario Brauns", "Sabine Hilt", "Thomas Mehner"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0155562.g001", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Correlation_of_i_H_i_sub_i_ex_i_sub_and_lipid_content_in_sample_tissues_/3378877", "title"=>"Correlation of <i>H</i>_<i>ex</i> and lipid content in sample tissues.", "pos_in_sequence"=>2, "defined_type"=>1, "published_date"=>"2016-05-11 05:51:04"}

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