Autochthonous vs. allochthonous organic matter ingested by a macroinvertebrate in headwater streams: Gammarus sp. as a biological probe fig: 1 tab: 3
Autochthonous vs. allochthonous organic matter ingested by a macroinvertebrate in headwater streams: Gammarus sp. as a biological probe fig: 1 tab: 3
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源头溪流中的大型无脊椎动物摄入的本地有机物与异地有机物：Gammarus sp。
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
D. Fontvieille
中科院分区：
文献类型：
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作者：
X. Gayte;D. Fontvieille
在源头河流中，仅靠沉降有机物的数量无法解释沉积物中产生的生物生产力。它的用途部分取决于它的质量，而质量又与其来源有关，无论是本地的还是异地的。该研究的目的是找到一种方法来估计小溪流中底栖大型无脊椎动物消耗的有机物的来源（本地或外来）（Stralher order 1）。初步结果导致选择Gammarus属作为生物探针。两个季节中具有不同营养预算的两条溪流的比较以及对 700 个肠道内容物的分析表明：1）硅藻/木质素比率是与沉降有机物来源相关的最有意义的参数，可以在沉积物和 Gammarus 肠道内容物中测量，2）大型（<10 mm）似乎选择性地以低 C/N 比的有机物为食，3）Gammarus 更喜欢沉积物有机物池的本地部分而不是有机物。异地之一。尽管底栖有机物质预算不同，但两条溪流中的这种选择似乎相似。
In headwater streams, the quantity of settling organic matter alone cannot explain the biological productivity that develops in sediments. Its use is partly determined by its quality, which in turn is related to its origin, either autochthonous or allochthonous. The aim of the study was to find a way to estimate the origin (autochthonous or allochthonous) of the organic matter consumed by benthic macroinvertebrates in small streams (Stralher order 1). Preliminary results led to the choice of the genus Gammarus as a biological probe. The comparison of two streams with different trophic budgets during two seasons and the analysis of 700 intestinal contents show that 1) the diatom/lignin ratio is the most meaningful parameter related to the origin of settling organic matter which can be measured both in sediments and in Gammarus intestinal contents, 2) large (<10 mm) seem to selectively feed on organic matter with a low C/N ratio, 3) Gammarus preferred the autochthonous part of the sediment organic pool over the allochthonous one. This selection seemed to be similar in the two streams though benthic organic matter budgets were different.