scholarly journals Body-size dependent temporal variations in nitrogen stable isotope ratios in food webs

2008 ◽  
Vol 370 ◽  
pp. 199-206 ◽  
Author(s):  
S Jennings ◽  
TAD Maxwell ◽  
M Schratzberger ◽  
SP Milligan
Keyword(s):  
Body Size ◽  
Stable Isotope ◽  
Food Webs ◽  
Isotope Ratios ◽  
Temporal Variations ◽  
Stable Isotope Ratios ◽  
Nitrogen Stable Isotope ◽  
Size Dependent

TRANSFER EFFICIENCY FROM PRIMARY PRODUCERS TO RUDITAPES PHILIPPINARUM ON AN INTERTIDAL FLAT IN HIROSHIMA BAY, JAPAN

2017 ◽  
Author(s):  
Sosuke Otani ◽  
Sosuke Otani ◽  
Akira Umehara ◽  
Akira Umehara ◽  
Haruka Miyagawa ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Secondary Production ◽  
Isotope Ratios ◽  
Ruditapes Philippinarum ◽  
Transfer Efficiency ◽  
Food Sources ◽  
Stable Isotope Ratios ◽  
Primary Producers ◽  
Nitrogen Stable Isotope ◽  
Carbon And Nitrogen

Fish yields of Ruditapes philippinarum have been decreased and the resources have not yet recovered. It needs to clarify food sources of R. philippinarum, and relationship between primary and secondary production of it. The purpose on this study is to reveal transfer efficiency from primary producers to R. philippinarum and food sources of R. philippinarum. The field investigation was carried out to quantify biomass of R. philippinarum and primary producers on intertidal sand flat at Zigozen beach in Hiroshima Bay, Japan. In particular, photosynthetic rates of primary producers such as Zostera marina, Ulva sp. and microphytobenthos were determined in laboratory experiments. The carbon and nitrogen stable isotope ratios for R. philippinarum and 8 potential food sources (microphytobenthos, MPOM etc) growing in the tidal flat were also measured. In summer 2015, the primary productions of Z. marina, Ulva sp. and microphytobenthos were estimated to be 70.4 kgC/day, 43.4 kgC/day and 2.2 kgC/day, respectively. Secondary production of R. philippinarum was 0.4 kgC/day. Contribution of microphytobenthos to R. philippinarum as food source was 56-76% on the basis of those carbon and nitrogen stable isotope ratios. Transfer efficiency from microphytobenthos to R. philippinarum was estimated to be 10-14%. It was suggested that microphytobenthos might sustain the high secondary production of R. philippinarum, though the primary production of microphytobenthos was about 1/10 compared to other algae.

Global dataset for carbon and nitrogen stable isotope ratios of lotic periphyton

2018 ◽  
Vol 33 (6) ◽  
pp. 1089-1089
Author(s):  
Naoto F. Ishikawa ◽  
Hideyuki Doi ◽  
Jacques C. Finlay
Keyword(s):  
Stable Isotope ◽  
Isotope Ratios ◽  
Stable Isotope Ratios ◽  
Nitrogen Stable Isotope ◽  
Carbon And Nitrogen

Nitrogen stable isotope ratios of lake macrophytes in relation to growth form and nutrient-limitation

2009 ◽  
Vol 175 (4) ◽  
pp. 307-315 ◽  
Author(s):  
Lydia King ◽  
Stephen C. Maberly ◽  
Mitzi M. De Ville ◽  
Michaela Kitschke ◽  
Christopher E. Gibson ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Nutrient Limitation ◽  
Growth Form ◽  
Isotope Ratios ◽  
Stable Isotope Ratios ◽  
Nitrogen Stable Isotope
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