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首页> 外文期刊>Journal of Tropical Ecology >Effects of hurricane disturbance on stream water concentrations and fluxes in eight tropical forest watersheds of the luquillo experimental forest, Puerto Rico.
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Effects of hurricane disturbance on stream water concentrations and fluxes in eight tropical forest watersheds of the luquillo experimental forest, Puerto Rico.

机译：飓风干扰对波多黎各luquillo实验森林的八个热带森林流域中溪流水浓度和通量的影响。

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摘要

Stream water chemistry responds substantially to watershed disturbances, but hurricane effects have not been extensively investigated in tropical regions. This study presents a long-term (2.5-11 years) weekly record of stream water chemistry on eight forested watersheds (catchment basins) in the Luquillo Mountains of Puerto Rico (1983-94). This includes a period before and at least 2 years after the disturbance caused by the 1989 Hurricane Hugo. Nitrate, potassium and ammonium concentrations increased after the hurricane and remained elevated for up to 2 years. Sulfate, chloride, sodium, magnesium and calcium showed smaller relative significant changes. Average stream water exports of potassium, nitrate and ammonium increased by 13.1, 3.6 and 0.54kg/ha per year, respectively, in the first post-hurricane year across all watersheds. The increased stream outputs of potassium and nitrogen in the first 2 years post-hurricane are equivalent to 3% (potassium) and 1% (nitrogen) of the hurricane-derivedplant litter. Effects of hurricanes on tropical stream water potassium and nitrogen can be greater than those caused by canopy gaps or limited forest cutting, but less than those following large-scale deforestation or fire.
机译：溪流水化学反应对流域扰动有很大反应，但尚未在热带地区广泛研究飓风的影响。这项研究显示了波多黎各卢奎洛山上八个森林流域（集水盆地）的长期（2.5-11年）溪流水化学记录（1983-94年）。这包括1989年飓风雨果造成的干扰之前和之后的至少2年。飓风后，硝酸盐，钾和铵的浓度增加，并保持升高长达2年。硫酸盐，氯化物，钠，镁和钙显示出较小的相对显着变化。在所有流域的飓风后第一年，钾，硝酸盐和铵的平均溪流水出口分别每年增加13.1、3.6和0.54kg / ha。飓风过后的头两年，钾和氮的增加的溪流产出相当于飓风衍生的凋落物的3％（钾）和1％（氮）。飓风对热带溪流水域钾和氮的影响可能大于由树冠间隙或有限的森林砍伐造成的影响，但小于大规模毁林或大火后的影响。

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