Trophic and growth baseline of dominant subtidal gastropods in contrasting subtropical marine environments
| Autor: | Alice K.Y. Chan, Billy K. Y. Kwan, Paul K.S. Shin, Siu Gin Cheung |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Food Chain 010504 meteorology & atmospheric sciences Gastropoda Aquatic Science Biology Oxygen Isotopes Oceanography 01 natural sciences Predation Animals 0105 earth and related environmental sciences Trophic level Isotope analysis geography Carbon Isotopes geography.geographical_feature_category δ13C Nitrogen Isotopes Ecology 010604 marine biology & hydrobiology Estuary δ15N biology.organism_classification Pollution Murex trapa Particulate Matter Seasons |
| Zdroj: | Marine pollution bulletin. 127 |
| ISSN: | 1879-3363 |
| Popis: | Using 13C/12C, 15N/14N and 18O/16O isotopes, the trophic relationship and growth estimation were analyzed in gastropods Nassarius siquijorensis, Murex trapa and Turritella bacillum and their potential food sources and predators in summer and winter from estuarine and oceanic environments in subtropical Hong Kong. Results of δ13C and δ15N values and isotopic mixing model revealed N. siquijorensis and M. trapa were one trophic level higher than T. bacillum, in which its main food source was particulate organic matter (POM) whereas N. siquijorensis largely consumed POM and polychaetes and M. trapa also preyed on other gastropods. Crabs were the major predator of gastropods. Organisms collected from oceanic waters were more 13C enriched than from estuarine waters, reflecting different carbon food sources from marine or terrestrial origin. The δ18O profile from shell carbonate suggested these gastropods were one to two years old. T. bacillum exhibited faster summer growth than the other two species. |
| Databáze: | OpenAIRE |
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