KOPRI Repository

Isotopic shift for defining habitat exploitation by the Antarctic limpet Nacella concinna from rocky coastal habitats (Marian Cove, King George Island)

Cited 16 time in wos
Cited 17 time in scopus
Title
Isotopic shift for defining habitat exploitation by the Antarctic limpet Nacella concinna from rocky coastal habitats (Marian Cove, King George Island)
Authors
Choy, Eun-Jung
Park, Hyun
Ahn, In-Young
Kang, Chang-Keun
Kim, Jeong-Hoon
Subject
Marine & Freshwater BiologyOceanography
Keywords
Food availabilityKing George IslandNacella concinnaRocky shoresphytobenthos
Issue Date
2011
Publisher
Elservier
Citation
Choy, Eun-Jung, et al. 2011. "Isotopic shift for defining habitat exploitation by the Antarctic limpet Nacella concinna from rocky coastal habitats (Marian Cove, King George Island)". ESTUARINE COASTAL AND SHELF SCIENCE, 92(3): 339-346.
Abstract
d13C and d15N of the Antarctic limpet Nacella concinna tissues and their potential food sources were measured to determine their dietary origins and their movements between diverse habitats of intertidal and subtidal rocky shores and tide pools of Marian Cove, King George Island, Antarctica in the austral summer. d13C and d15N of the organic matter sources of epilithic microalgae, macroalgae, and suspended particulate organic matter (SPOM) were readily distinguishable to discern their relative contribution to the limpet diets, with the most depleted values being found in SPOM and the most enriched in macroalgae. The limpets exhibited a spatial trend in distribution due to their seasonal migration, with smaller individuals in the subtidal zone as compared with larger ones on the intertidal sites. The limpet isotopes had relatively broad ranges of d13C and d15N (?26.6 to ?12.8‰ and 2.6 to 7.1‰, respectively), suggesting a dietary shift between habitats as well as size classes. The stable isotope ratios for each habitat seem likely to reflect the differing availabilities of the three potential food sources. Isotope mixing model results indicate a spatial shift in dietary mixture between habitats as well as limpet size classes. Epilithic microalgae and phytoplankton made great contributions to the diet of the subtidal limpets. Together with epilithic microalgae, macroalgae were significant contributors to the intertidal limpets where macroalgae were abundant. A higher contribution of macroalgae to the limpet diets was found in the tide pools. In contrast, while phytoplankton was an important food source for the limpet spats, a great dietary dependence on epilithic microalgae was found in the small-size limpets from the lower intertidal zone. Our results suggest that limpet grazing can determine microalgal and/or macroalgal abundance and coverage on the Antarctic rocky-shore ecosystem, and trophic structure of benthic food web can change along environmental
URI
https://repository.kopri.re.kr/handle/201206/6251
DOI
http://dx.doi.org/10.1016/j.ecss.2011.01.009
Type
Article
Indexed
SCI
Appears in Collections  
2008-2010, Studies on Polar organisms and ecosystem changes (08-10) / Ahn, In-Young (PE09040, PE10040, PE08040)
2011-2013, Studies on biodiversity and changing ecosystems in King George Islands, Antarctica (BIOCE) (11-13) / Choi, Han-Gu (PE11030, PE12030, PE13030)
Files in This Item

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse