Helena A. Kehrig, G. Baptista, Ana Paula Madeira Di Beneditto, M. Almeida, Carlos Eduardo de Rezende, Salvatore Siciliano, Jailson Fulgencio de Moura, Isabel Moreira
{"title":"利用氮的稳定同位素作为生态标记,对大西洋斑纹海豚(Stenella frontalis)食物链中的汞进行生物放大","authors":"Helena A. Kehrig, G. Baptista, Ana Paula Madeira Di Beneditto, M. Almeida, Carlos Eduardo de Rezende, Salvatore Siciliano, Jailson Fulgencio de Moura, Isabel Moreira","doi":"10.4067/S0718-19572017000200004","DOIUrl":null,"url":null,"abstract":"An assessment of mercury (Hg) concentrations and nitrogen stable isotope (15N) was conducted in the food chain of the \nAtlantic spotted dolphin (Stenella frontalis), including phytoplankton, zooplankton, planktivorous fish and its major prey (predatory \nfish and a single species of cephalopod), that compose a tropical trophic chain of the Brazilian southeastern coast. Tissue \nconcentrations of Hg in a voracious predator fish, the largehead hairtail (Trichiurus lepturus), one of the dolphin’s prey, were 9.8 \ntimes lower than median concentrations found in dolphin tissues. 15N values in predatory fish were found to be lower to those of \nits predator the spotted dolphin. Isotopic data suggested significant differences for 15N along the trophic chain, with the top \npredator (dolphin) exhibiting heavier value, followed by the voracious predator fish and the benthonic carnivorous fish, the \nwhitemouth croaker (Micropogonias furnieri). Phytoplankton displayed the lightest 15N, followed by zooplankton and the \nplanktophagous fish, the lebranche mullet (Mugil liza). This fish species and the cephalopod showed the lowest median Hg \nconcentration. All links of the entire trophic chain presented trophic transfer of Hg with a biomagnification factor higher than 1. \nA significant relationship was found between the log Hg concentration and trophic level (TL) of all evaluated species, with a \npositive slope (= 0.87). The calculated trophic magnification factor (TMF= 7.44) indicates that Hg concentration increased per TL, \nand also that the entire coastal food chain from the South Atlantic Ocean presented a biomagnification power of Hg within a range \npreviously reported for tropical coastal ecosystems.","PeriodicalId":0,"journal":{"name":"","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0718-19572017000200004","citationCount":"12","resultStr":"{\"title\":\"Biomagnificación de mercurio en la cadena trófica del Delfín Moteado del Atlántico(Stenella frontalis), usando el isótopo estable de nitrógeno como marcador ecológico\",\"authors\":\"Helena A. Kehrig, G. Baptista, Ana Paula Madeira Di Beneditto, M. Almeida, Carlos Eduardo de Rezende, Salvatore Siciliano, Jailson Fulgencio de Moura, Isabel Moreira\",\"doi\":\"10.4067/S0718-19572017000200004\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"An assessment of mercury (Hg) concentrations and nitrogen stable isotope (15N) was conducted in the food chain of the \\nAtlantic spotted dolphin (Stenella frontalis), including phytoplankton, zooplankton, planktivorous fish and its major prey (predatory \\nfish and a single species of cephalopod), that compose a tropical trophic chain of the Brazilian southeastern coast. Tissue \\nconcentrations of Hg in a voracious predator fish, the largehead hairtail (Trichiurus lepturus), one of the dolphin’s prey, were 9.8 \\ntimes lower than median concentrations found in dolphin tissues. 15N values in predatory fish were found to be lower to those of \\nits predator the spotted dolphin. Isotopic data suggested significant differences for 15N along the trophic chain, with the top \\npredator (dolphin) exhibiting heavier value, followed by the voracious predator fish and the benthonic carnivorous fish, the \\nwhitemouth croaker (Micropogonias furnieri). Phytoplankton displayed the lightest 15N, followed by zooplankton and the \\nplanktophagous fish, the lebranche mullet (Mugil liza). This fish species and the cephalopod showed the lowest median Hg \\nconcentration. All links of the entire trophic chain presented trophic transfer of Hg with a biomagnification factor higher than 1. \\nA significant relationship was found between the log Hg concentration and trophic level (TL) of all evaluated species, with a \\npositive slope (= 0.87). The calculated trophic magnification factor (TMF= 7.44) indicates that Hg concentration increased per TL, \\nand also that the entire coastal food chain from the South Atlantic Ocean presented a biomagnification power of Hg within a range \\npreviously reported for tropical coastal ecosystems.\",\"PeriodicalId\":0,\"journal\":{\"name\":\"\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0,\"publicationDate\":\"2017-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.4067/S0718-19572017000200004\",\"citationCount\":\"12\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.4067/S0718-19572017000200004\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.4067/S0718-19572017000200004","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Biomagnificación de mercurio en la cadena trófica del Delfín Moteado del Atlántico(Stenella frontalis), usando el isótopo estable de nitrógeno como marcador ecológico
An assessment of mercury (Hg) concentrations and nitrogen stable isotope (15N) was conducted in the food chain of the
Atlantic spotted dolphin (Stenella frontalis), including phytoplankton, zooplankton, planktivorous fish and its major prey (predatory
fish and a single species of cephalopod), that compose a tropical trophic chain of the Brazilian southeastern coast. Tissue
concentrations of Hg in a voracious predator fish, the largehead hairtail (Trichiurus lepturus), one of the dolphin’s prey, were 9.8
times lower than median concentrations found in dolphin tissues. 15N values in predatory fish were found to be lower to those of
its predator the spotted dolphin. Isotopic data suggested significant differences for 15N along the trophic chain, with the top
predator (dolphin) exhibiting heavier value, followed by the voracious predator fish and the benthonic carnivorous fish, the
whitemouth croaker (Micropogonias furnieri). Phytoplankton displayed the lightest 15N, followed by zooplankton and the
planktophagous fish, the lebranche mullet (Mugil liza). This fish species and the cephalopod showed the lowest median Hg
concentration. All links of the entire trophic chain presented trophic transfer of Hg with a biomagnification factor higher than 1.
A significant relationship was found between the log Hg concentration and trophic level (TL) of all evaluated species, with a
positive slope (= 0.87). The calculated trophic magnification factor (TMF= 7.44) indicates that Hg concentration increased per TL,
and also that the entire coastal food chain from the South Atlantic Ocean presented a biomagnification power of Hg within a range
previously reported for tropical coastal ecosystems.