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首页> 外文期刊>Hydrology research >Variation in stream C, N and P uptake along an altitudinal gradient: a space-for-time analogue to assess potential impacts of climate change
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Variation in stream C, N and P uptake along an altitudinal gradient: a space-for-time analogue to assess potential impacts of climate change

机译：碳，氮和磷吸收量沿高度梯度的变化：一种时空类似物，用于评估气候变化的潜在影响

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摘要

A space-for-time substitution approach was used to evaluate potential effects of climate change on stream nutrient uptake by examining the relationship between stream environmental parameters and carbon (C), nitrogen (N) and phosphorus (P) uptake along an altitudinal gradient. The study was carried out in 14 streams located in the Central Pyrenees (NE Spain) draining calcareous catchments that cover an altitudinal range of 700-2,100 ma.s.l. In these streams, uptake of inorganic (soluble reactive phosphorus (SRP), ammonium and nitrate) and organic (acetate and glycine) nutrients was estimated. Additionally, several physical, chemical and biological parameters were measured. Results showed higher uptake for both SRP, a potentially limiting nutrient in these streams, and glycine, a labile source of dissolved organic N, than for the rest of the nutrients. Uptake of SRP, nitrate, glycine and acetate varied along stream environmental gradients associated with changes in stream hydromorphology, SRP availability and epilithic biomass. However, these gradients did not vary with altitude. These results Indicate that climate change effects on stream nutrient uptake are more likely to be driven by indirect effects on hydromorphology and nutrient availability induced by shifts in the precipitation and run-off regime than by direct modifications in the thermal regime.
机译：通过检查河流环境参数与沿海拔梯度的碳（C），氮（N）和磷（P）摄取之间的关系，采用时空置换方法评估气候变化对河流养分吸收的潜在影响。这项研究是在位于比利牛斯中部（西班牙东北部）的14条溪流中进行的，这些溪水排放的钙质流域覆盖的海拔范围为700-2,100ma.s.l。在这些流中，估计吸收了无机（可溶性反应性磷（SRP），铵和硝酸盐）和有机（乙酸盐和甘氨酸）养分。此外，还测量了一些物理，化学和生物学参数。结果表明，与其余养分相比，SRP（这些流中的潜在限制性养分）和甘氨酸（一种不稳定的溶解性有机氮源）的摄取都更高。 SRP，硝酸盐，甘氨酸和乙酸盐的摄取量随河流环境梯度的变化而变化，这与河流的水形态，SRP的利用度和表观生物质的变化有关。但是，这些梯度不会随海拔高度而变化。这些结果表明，气候变化对河流养分吸收的影响更可能是由降水和径流方式的变化对水形态和养分有效性的间接影响而不是由热力条件的直接改变所驱动。

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  • 来源
    《Hydrology research》 |2009年第3期|123-137|共15页
  • 作者

    Eugenia Marti; Paula Fonolla; Daniel von Schiller; Francesc Sabater; Alba Argerich; Miquel Ribot; Joan Lluis Riera;

  • 作者单位

    Limnology Group, Centre d'Estudis Avancats de Blanes, Consejo Superior de Investigaciones Cientificas, Acces a la Cala Sant Francesc 14, Blanes 17300, Spain;

    Limnology Group, Centre d'Estudis Avancats de Blanes, Consejo Superior de Investigaciones Cientificas, Acces a la Cala Sant Francesc 14, Blanes 17300, Spain;

    Limnology Group, Centre d'Estudis Avancats de Blanes, Consejo Superior de Investigaciones Cientificas, Acces a la Cala Sant Francesc 14, Blanes 17300, Spain;

    Limnology Group, Departament d'Ecologia, Universitat de Barcelona, Av, Diagonal 645, Barcelona 08028, Spain;

    Limnology Group, Departament d'Ecologia, Universitat de Barcelona, Av, Diagonal 645, Barcelona 08028, Spain;

    Limnology Group, Centre d'Estudis Avancats de Blanes, Consejo Superior de Investigaciones Cientificas, Acces a la Cala Sant Francesc 14, Blanes 17300, Spain;

    Limnology Group, Departament d'Ecologia, Universitat de Barcelona, Av, Diagonal 645, Barcelona 08028, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    carbon; climate change; nitrogen; phosphorus; streams; uptake;

    机译：碳;气候变化;氮;磷;溪流;摄取;

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