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How methane becomes fish food
http://www.liu.se/forskning/forskningsnyheter/1.357122?l=en[font face=Serif][font size=5]How methane becomes fish food [/font]
[font size=4]Methane produced at the bottom of our lakes provides nutrition for microorganisms and eventually becomes an indirect food source for fish. These findings were presented in a one of a kind study that contradicts previous perceptions of lakebed sediment methane stores being lost in the food chain.[/font]
[font size=3]Methane is an organic carbon compound containing the fundamental building block of nearly all living material: carbon. It provides an important source of energy and nutrients for bacteria. Methane is produced in oxygen-free environments and is found in abundance at the bottom of lakes.
The Brazilian post-doctoral researcher in biology and ecology, Angela Sanseverino, has presented a study that shows methane from lakebeds to be present in fish tissue. The study was carried out in cooperation with, inter alia, David Bastviken, Water and Environmental Studies (WES), Linköping University.
Angela Sanseverino has studied a combination of two biomarkers: a stable isotope that indicates the presence of methane along with a specific fatty acid from methane-oxidizing bacteria. The study was carried out on fish and other parts of the food web from a lake in the Pantanal, inland Brazil. The findings of the study have been reported in a recently published article in the prestigious online research journal PLoS ONE.
“This is the first time we can say with any great certainty that methane from the lake bed has ended up in fish tissue via the food chain”, says David Bastviken. “Isotopic studies have been carried out in the past, but they have been more uncertain as they only related to one biomarker. We now have two independent biomarkers presenting the same results. This considerably increases the certainty of our findings.”
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http://dx.doi.org/10.1371/journal.pone.0042723[font size=4]Methane produced at the bottom of our lakes provides nutrition for microorganisms and eventually becomes an indirect food source for fish. These findings were presented in a one of a kind study that contradicts previous perceptions of lakebed sediment methane stores being lost in the food chain.[/font]
[font size=3]Methane is an organic carbon compound containing the fundamental building block of nearly all living material: carbon. It provides an important source of energy and nutrients for bacteria. Methane is produced in oxygen-free environments and is found in abundance at the bottom of lakes.
The Brazilian post-doctoral researcher in biology and ecology, Angela Sanseverino, has presented a study that shows methane from lakebeds to be present in fish tissue. The study was carried out in cooperation with, inter alia, David Bastviken, Water and Environmental Studies (WES), Linköping University.
Angela Sanseverino has studied a combination of two biomarkers: a stable isotope that indicates the presence of methane along with a specific fatty acid from methane-oxidizing bacteria. The study was carried out on fish and other parts of the food web from a lake in the Pantanal, inland Brazil. The findings of the study have been reported in a recently published article in the prestigious online research journal PLoS ONE.
“This is the first time we can say with any great certainty that methane from the lake bed has ended up in fish tissue via the food chain”, says David Bastviken. “Isotopic studies have been carried out in the past, but they have been more uncertain as they only related to one biomarker. We now have two independent biomarkers presenting the same results. This considerably increases the certainty of our findings.”
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