TY - JOUR
T1 - Stable isotopes indicate individual level trophic diversity in the freshwater gastropod Lymnaea stagnalis
AU - Doi, Hideyuki
AU - Yurlova, Natalia I.
AU - Kikuchi, Eisuke
AU - Shikano, Shuichi
AU - Yadrenkina, Elena N.
AU - Vodyanitskaya, Svetlana N.
AU - Zuykova, Elena I.
N1 - Funding Information:
We sincerely thank K. Itoh for providing the stable isotope analytical facilities in her laboratory. We thank A.K. Yurlov and E.A. Serbina for helping in the field survey, and S.P. Johnson for reviewing an early version of the manuscript. Three anonymous reviewers provided constructive input into the paper. This study was partly supported by Grant-in-Aid for Scientific Research (B) from the Japan Society for the Promotion of Science (Nos 13575004, 16405005), the Russian Found Basic Research (RFBR, Nos 07-04-01416, 09-04-92104, 10-04-01293) and the Program of Basic research of the Russian Academy of Science (No. 23.5).
PY - 2010/11
Y1 - 2010/11
N2 - In lacustrine ecosystems, benthic grazers are generally thought to feed on sediment detritus and microalgae, although there is a paucity of information on food resource use within populations. In this study, we investigated individual level trophic signatures for grazing snails, Lymnaea stagnalis, along with primary consumers and producers in the same habitat, using carbon and nitrogen stable-isotope analyses. In addition, we tested whether ontogeny and parasite presence influence food resource use. The large variation in δ13C and δ15N isotopic signatures indicated that individuals within a population feed on different food sources. Snails appear to have much greater individual variance in trophic behaviour than the other lacustrine species sampled (larval chironomid Chironomus plumosus, amphipods, Gammarus lacustris, zooplankton Ceriodaphnia sp. and Simocephalus vetulus). Moreover, variation among snails was not explained by shell length or the presence of parasitic infections. Habitat heterogeneity and resource availability at the microhabitat level may be the primary factors determining individual food sources.
AB - In lacustrine ecosystems, benthic grazers are generally thought to feed on sediment detritus and microalgae, although there is a paucity of information on food resource use within populations. In this study, we investigated individual level trophic signatures for grazing snails, Lymnaea stagnalis, along with primary consumers and producers in the same habitat, using carbon and nitrogen stable-isotope analyses. In addition, we tested whether ontogeny and parasite presence influence food resource use. The large variation in δ13C and δ15N isotopic signatures indicated that individuals within a population feed on different food sources. Snails appear to have much greater individual variance in trophic behaviour than the other lacustrine species sampled (larval chironomid Chironomus plumosus, amphipods, Gammarus lacustris, zooplankton Ceriodaphnia sp. and Simocephalus vetulus). Moreover, variation among snails was not explained by shell length or the presence of parasitic infections. Habitat heterogeneity and resource availability at the microhabitat level may be the primary factors determining individual food sources.
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U2 - 10.1093/mollus/eyq020
DO - 10.1093/mollus/eyq020
M3 - Article
AN - SCOPUS:78049252830
VL - 76
SP - 384
EP - 388
JO - Journal of Molluscan Studies
JF - Journal of Molluscan Studies
SN - 0260-1230
IS - 4
ER -