Contributions of autochthonous, allochthonous, and aged carbon and organic matter to macroinvertebrate nutrition in the Susquehanna River basin
Contributions of autochthonous, allochthonous, and aged carbon and organic matter to macroinvertebrate nutrition in the Susquehanna River basin
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萨斯奎哈纳河流域本地、外来和老化碳和有机质对大型无脊椎动物营养的贡献
DOI：
10.1086/705017
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发表时间：
2019
影响因子：
1.8
通讯作者：
Grottoli, Andrea G.
中科院分区：
文献类型：
--
作者：
Bellamy, Amber R.;Bauer, James E.;Grottoli, Andrea G.
先前的研究表明，河流运输大量的老化外来物质，但目前还不清楚这些物质在多大程度上对大型无脊椎动物的生物量有营养贡献。此外，很少有研究调查外来与本地的营养资源利用大型无脊椎动物的支流和主要河流系统的低位流。本研究的主要目标是量化的来源和年龄的有机质（OM），有助于流大型无脊椎动物的营养在不同的功能摄食组（FFG）。我们使用天然丰度稳定（δ 13 C，δ 15 N和δ 2 H）和放射性（Δ 14 C）同位素来评估萨斯奎汉纳河流域7个子流域河流网络的资源使用情况。同位素混合模型表明，本地OM贡献高达80%的大型无脊椎动物生物量的刮刀，过滤收集器，收集器-采集器FFGs，而外来源的贡献少得多（6-44%），这些FFGs的大型无脊椎动物生物量。然而，外来OM贡献了高达73%的粉碎机FFG生物量。老年人的贡献（从75- 11，700年B. P.）OM大型无脊椎动物的生物量不同的大型无脊椎动物组。摇蚊同化年龄最大的OM（43%）的任何大型无脊椎动物组，其中大部分是从土壤和沉积物来源。我们还发现，在本研究中（5600-4200年B. P.），甲烷渗漏活跃的河流中的大型无脊椎动物在其组织中具有最古老的C，这可能是由于大型无脊椎动物消耗了来自甲烷渗漏的碳。我们的研究结果表明，大型无脊椎动物同化OM的来源和年龄在很大程度上不同的功能FFG，这些差异可能是由于FFG的栖息地和饮食偏好，以及存在或不存在的古老形式的C流。
Previous research suggests that rivers transport large amounts of aged allochthonous material, but it is unclear how much of this material contributes nutritionally to macroinvertebrate biomass. Furthermore, little research has investigated allochthonous vs autochthonous nutritional resource use by macroinvertebrates in the tributaries and low-order streams of major river systems. The primary goal of this study was to quantify both the sources and ages of organic matter (OM) that contributes to the nutrition of stream macroinvertebrates in different functional feeding groups (FFGs). We used natural abundance stable (δ13C, δ15N, and δ2H) and radiogenic (Δ14C) isotopes to assess resource use in a network of 7 subwatershed streams in the Susquehanna River basin. Isotope mixing models revealed that autochthonous OM contributed as much as 80% of macroinvertebrate biomass for scraper, filtering collector, and collector–gatherer FFGs, whereas allochthonous sources contributed much less (6–44%) to macroinvertebrate biomass of these FFGs. However, allochthonous OM contributed up to 73% of shredder FFG biomass. Contributions of aged (ranging from 75–11,700 y B.P.) OM to macroinvertebrate biomass varied by macroinvertebrate group. Chironomids assimilated the most aged OM (43%) of any macroinvertebrate group, most of which was from soil and sediment sources. We also found that macroinvertebrates in a stream with active methane seepage had the oldest C in their tissues of the streams in this study (5600–4200 y B.P.), which was probably a result of the macroinvertebrates consuming C derived from this methane seep. Our findings show that the sources and ages of OM assimilated by macroinvertebrates largely varied as a function of FFG and that these differences probably resulted from FFG habitats and diet preferences, as well as the presence or absence of ancient forms of C in streams.
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DOI：
10.1899/12-101.1
发表时间：
2013
期刊：
The Science of the total environment
影响因子：
--
作者：
S. Sulliván
通讯作者：
S. Sulliván
从河流输出到海洋边缘的有机和无机碳的数量、同位素特征和年龄： 1. 陆地损失和中大西洋湾输入的估计
影响因子：
5.2
作者：
K. Hossler;J. Bauer
通讯作者：
J. Bauer
影响因子：
4.5
作者：
Nina S. Reuss;L. Hamerlík;G. Velle;A. Michelsen;O. Pedersen;K. Brodersen
通讯作者：
Nina S. Reuss;L. Hamerlík;G. Velle;A. Michelsen;O. Pedersen;K. Brodersen
影响因子：
4.8
作者：
J. Muehlbauer;S. Collins;M. Doyle;K. Tockner
通讯作者：
J. Muehlbauer;S. Collins;M. Doyle;K. Tockner
影响因子：
1.8
作者：
E. Rosi-Marshall;K. Vallis;C. Baxter;J. Davis
通讯作者：
E. Rosi-Marshall;K. Vallis;C. Baxter;J. Davis