Seasonal shifts in food sources influence feeding habits of three macrozoobenthos species in the Yundang Lagoon: the evidence from stable isotope

Zheng Xinqing; Huang Lingfeng; Lin Rongcheng

doi:10.3969/j.issn.0253-4193.2014.12.003

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Zheng Xinqing, Huang Lingfeng, Lin Rongcheng. Seasonal shifts in food sources influence feeding habits of three macrozoobenthos species in the Yundang Lagoon: the evidence from stable isotope[J]. Haiyang Xuebao, 2014, 36(12): 32-40. doi: 10.3969/j.issn.0253-4193.2014.12.003

Citation:

Zheng Xinqing, Huang Lingfeng, Lin Rongcheng. Seasonal shifts in food sources influence feeding habits of three macrozoobenthos species in the Yundang Lagoon: the evidence from stable isotope[J]. Haiyang Xuebao, 2014, 36(12): 32-40. doi: 10.3969/j.issn.0253-4193.2014.12.003

Citation:

Zheng Xinqing, Huang Lingfeng, Lin Rongcheng. Seasonal shifts in food sources influence feeding habits of three macrozoobenthos species in the Yundang Lagoon: the evidence from stable isotope[J]. Haiyang Xuebao, 2014, 36(12): 32-40. doi: 10.3969/j.issn.0253-4193.2014.12.003

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Seasonal shifts in food sources influence feeding habits of three macrozoobenthos species in the Yundang Lagoon: the evidence from stable isotope

doi: 10.3969/j.issn.0253-4193.2014.12.003

1.
Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
2.
College of the Environment and Ecology, Xiamen University, Xiamen 361005, China

Received Date: 2014-04-18
Rev Recd Date: 2014-06-02

Abstract

Abstract

Carbon and nitrogen stable isotope (δ¹³C and δ¹⁵N,respectively) analysis were made on three species of lagoon macrozoobenthos (suspension feeder Mytilopsis sallei,and deposit feeders Grandidierella japonica and Neanthes japonica) and their food sources in March and September in order to examine the influence of seasonal shifts in food sources to their feeding habits. The results showed that there is a significant difference in δ¹³C and δ¹⁵N of POM observed. Due to the large input of terrestrial debris and the sewage water discharged by the catering industry around the lagoon,lagoon POM in March was characterized by depleted-δ¹³C and δ¹⁵N. However,the contribution of phytoplankton increased in September as temperature increased. M. sallei was a typical benthic filter-feeder as suggested by the δ¹³C values closest to POM. However,it displayed a little more enriched in δ¹³C than POM,indicating that it may assimilate other δ¹³C-enriched organic matters,perhaps the debris from Ulva lactuca in March and benthic microalgae in September. Deposit feeder G. japonica and N. japonica mainly fed on U. lactuca and its associated epiphytes in March while obtained the carbon sources from benthic microalgae and phytoplankton in September. Our results indicated the significantly seasonal variations in δ¹⁵N for three macrozoobenthos species with the Δδ¹⁵N between 2.2‰ and 4.3‰,which may be caused by seasonal shifts of the stable isotope of food sources and their feeding habits. The differences of feeding habits for these macrozoobenthos were strongly affected by food availabilities in the lagoon.
- Macrozoobenthos,
- seasonal shifts,
- feeding habits,
- stable isotope,
- Yundang Lagoon

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References(39)

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