閉鎖性内湾における光合成硫黄細菌由来有機物の高次捕食者への転送に関する基礎的研究
| العنوان: | 閉鎖性内湾における光合成硫黄細菌由来有機物の高次捕食者への転送に関する基礎的研究 |
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| المصدر: | 長崎大学水産学部研究報告. 97:11-17 |
| بيانات النشر: | 長崎大学水産学部, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | 貧酸素水塊, 濾過食動物, anaerobic autotrophic bacteria, 安定同位体標識, photosynthetic sulfur bacteria, filter feeders, stable isotopes labeling, semi-closed bay, 光合成硫黄細菌, 閉鎖性内湾, hypoxic water mass, 嫌気性独立栄養細菌 |
| الوصف: | Hypoxic water mass often formed in semi-closed bay during summer causes mass death events of the benthic organisms due to anoxic water at the bottom layer. On the other hand, autotrophic bacteria which proliferate in the anoxic condition may partially contribute to biological production in the bay, as food source for the heterotrophs inhabiting outside the hypoxic water mass. In this study, we investigated whether the organic matter derived from photosynthetic sulfur bacteria, a species of anaerobic autotrophic bacteria which were incubated from the bottom sediment in the Omura Bay, were actually assimilated by benthic filter feeders, based on the stable isotopes (13C, 15N)-labeled techniques. First, 13C, 15N-labeled bacteria were fed to a bivalve, Anadara broughtonii. And carbon (C) and nitrogen (N) assimilation rates were determined, and compared with the results from the control experiments in which labeled phytoplankton were fed. The assimilations of bacteria-derived organic C and N into the muscle tissue in A. broughtonii were surely confirmed, although the assimilation rates were greatly smaller than those of phytoplankton-derived organic matter (i.e., 1/36 for C, 1/6 for N). The lower assimilation rate of C compared with N in either of the food sources (i.e., 50% in case of phytoplankton, and 10% bacteria) suggested that newly incorporated C was promptly metabolized as respiratory substrate. The results of this study suggested that an increase in the biomass of anaerobic autotrophic bacteria associated with hypoxic water mass contributes to biological production in the inner bay as one of food sources. 長崎大学水産学部研究報告, 97, pp.11-17; 2016 |
| وصف الملف: | application/pdf |
| اللغة: | Japanese |
| تدمد: | 0547-1427 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=jairo_______::d17779295bc70e795e26cbfabd08e71f https://nagasaki-u.repo.nii.ac.jp/records/3208 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.jairo.........d17779295bc70e795e26cbfabd08e71f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 05471427 |
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