強酸性湖潟沼における炭素・窒素安定同位体比によるサンユスリカ(Chironomus acerbiphilus)幼虫の餌資源解析
強酸性湖潟沼における炭素・窒素安定同位体比によるサンユスリカ(Chironomus acerbiphilus)幼虫の餌資源解析
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基于碳氮稳定同位素比值的高酸性湖沼摇蚊幼虫食物资源分析
DOI：
10.3769/radioisotopes.50.12_601
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
秀一 鹿野
中科院分区：
文献类型：
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作者：
秀幸 土居;永祐 菊地;秀一 鹿野
利用碳、氮稳定同位素比值分析了片沼湖摇蚊幼虫的食物来源。片沼湖（Lake Katanuma）是一个火山湖和强酸性湖泊（平均pH值2.2）。在片沼湖，摇蚊幼虫的饮食的潜在来源是有限的，包括底栖硅藻（Pinnularia braunii），浮游植物（嗜酸衣原体），硫酸盐氧化细菌，和维管植物提供的植被周围的湖泊。根据这些潜在来源和沉积物的平均碳和氮同位素比值，底栖硅藻被认为是摇蚊幼虫最可能的食物来源。摇蚊的δ 13 C值在不同季节和不同生境深度之间存在显著差异，表明摇蚊的食性与环境有关。acerbiphilus的季节变化和栖息地的深度。
The food sources for Chironomus acerbiphilus larvae (Diptera Chironomidae) were analyzed using carbon and nitrogen stable isotope ratios in Lake Katanuma. Lake Katanuma is a volcanic and strongly acidic lake (average pH 2.2) . In Lake Katanuma, potential sources of diets for the chironomid larvae are limited including a benthic diatom (Pinnularia braunii), a phytoplankton (Chlamydomonas acidophila), sulfate oxidizing bacteria, and vascular plants supplied from vegetation surrounding the lake. Based on the average carbon and nitrogen isotope ratios among these potential sources and sediment, benthic diatoms were considered to be most probable food source of the chironomid larvae. δ13C values of the chironomid were significantly different among seasons and habitat depths, suggesting that diet of C. acerbiphilus changed seasonally and with habitat depth.