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- W2149028046 endingPage "2199" @default.
- W2149028046 startingPage "2194" @default.
- W2149028046 abstract "Water movement affects carbon and nitrogen isotopic signatures of algae, possibly through effects on boundarylayer thickness. We describe a laboratory experiment carried out in artificial streams, which supports this hypothesis. Periphyton δ13C and δ15N signatures were significantly depleted in 13C and 15N when grown at higher water velocity over the range of 5–62 cm s−1, the normal range found in small streams. δ13C signatures ranged between —16.7‰ and —28.1‰ from the lowest to the highest water velocity, respectively. Similarly, δ15N signatures ranged between 7.2‰ and 2.3‰ from the lowest to the highest water velocity, respectively. This pattern was found for algal communities growing on glass (mainly diatoms) as well as for those growing on rock (mainly filamentous green algae). For both C and N, the slopes of the responses were not different between the periphyton communities growing on each substrate, although the effect was statistically weaker for the communities on rocks. The intercept for δ13C was significantly higher for the communities on rocks, but not different for δ15N. Thus, while both isotopes are fractionated to a greater extent as velocity increases, the diatom communities growing on glass appeared to fractionate C isotopes more than the filamentous green algae growing on rock. This relationship between the stable isotopic signatures of aquatic plants and water velocity will hopefully allow a better understanding of the differences in isotopic signatures of fish in different habitats." @default.
- W2149028046 created "2016-06-24" @default.
- W2149028046 creator A5002172575 @default.
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- W2149028046 date "2003-11-01" @default.
- W2149028046 modified "2023-10-16" @default.
- W2149028046 title "The effect of water velocity on stable carbon and nitrogen isotope signatures of periphyton" @default.
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- W2149028046 doi "https://doi.org/10.4319/lo.2003.48.6.2194" @default.
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