当前位置：
X-MOL 学术
›
Hydrol. Process.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
The GEOMON network of Czech catchments provides long-term insights into altered forest biogeochemistry: From acid atmospheric deposition to climate change
Hydrological Processes ( IF 2.8 ) Pub Date : 2021-05-06 , DOI: 10.1002/hyp.14204 Filip Oulehle 1, 2 , Milan Fischer 2 , Jakub Hruška 1, 2 , Tomáš Chuman 1 , Pavel Krám 1, 2 , Tomáš Navrátil 3 , Miroslav TesaŘ 4 , Miroslav Trnka 2
Hydrological Processes ( IF 2.8 ) Pub Date : 2021-05-06 , DOI: 10.1002/hyp.14204 Filip Oulehle 1, 2 , Milan Fischer 2 , Jakub Hruška 1, 2 , Tomáš Chuman 1 , Pavel Krám 1, 2 , Tomáš Navrátil 3 , Miroslav TesaŘ 4 , Miroslav Trnka 2
Affiliation
|
In 1994, a network of small catchments (GEOMON) was established in the Czech Republic to determine input–output element fluxes in semi-natural forest ecosystems recovering from anthropogenic acidification. The network consists from 16 catchments and the primary observations of elements fluxes were complemented by monitoring of biomass stock, element pools in soil and vegetation, and the main water balance components. Over last three decades, reductions of SO2, NOx and NH3 emissions were followed by sulphur (S) and nitrogen (N) deposition reductions of 75% and 30%, respectively. Steeper declines of strong acid anion concentrations compared to cations (Ca, Mg, Na, K, NH4) in precipitation resulted in precipitation pH increase from 4.5 to 5.2 in bulk precipitation and from 4.0 to 5.1 in spruce throughfall. Stream chemistry responded to changes in deposition: S leaching declined. However at majority of catchments soils acted as a net source of S to runoff, delaying recovery. Stream pH increased at acidic streams (pH < 6) and aluminium concentration decreased. Stream nitrate (NO3) concentration declined by 60%, considerably more than N deposition. Stream NO3 concentration was tightly positively related to stream total dissolved nitrogen to total phosphorus (P) ratio, suggesting the role of P availability on N retention. Trends in dissolved organic carbon fluxes responded to both acidification recovery and to runoff temporal variation. An exceptional drought occurred between 2014 and 2019. Over this recent period, streamflow decreased by ≈ 40% on average compared to 1990s, due to the increases of soil evaporation and vegetation transpiration by ≈ 30% and declines in precipitation by ≈ 15% on average across the elevational gradient. Sharp decreases of stream runoff at catchments <650 m a.s.l. corresponded to areas of recent forest decline caused by bark beetle infestation on drought stressed spruce forests. Understanding of the interactions among legacies of acidification and eutrophication, drought effects on the water cycle and forest disturbance dynamics is requisite for effective management of forested ecosystems under anthropogenic influence.
中文翻译：
捷克流域的GEOMON网络提供了有关改变的森林生物地球化学的长期见解：从酸性大气沉积到气候变化
1994年，捷克共和国建立了一个小流域网络（GEOMON），以确定从人为酸化中恢复的半天然森林生态系统中的投入产出要素通量。该网络由16个流域组成，元素通量的主要观察结果通过监测生物量储备，土壤和植被中的元素库以及主要的水平衡成分得到补充。在过去的三十年中，SO 2，NO x和NH 3排放量的减少之后，硫（S）和氮（N）的沉积量分别减少了75％和30％。与阳离子（Ca，Mg，Na，K，NH 4）导致大量沉淀的pH值从4.5增加到5.2，而云杉穿透的pH值从4.0上升到5.1。流化学反应对沉积的变化作出反应：浸出下降。然而，在大多数流域，土壤充当了径流中硫的净来源，从而延迟了恢复。在酸性物流（pH <6）下，物流pH升高，铝浓度降低。流态硝酸盐（NO 3）的浓度下降了60％，大大超过了氮的沉积量。3号流浓度与水流中总溶解氮与总磷（P）的比例密切相关，表明磷的有效性对氮保留的作用。溶解有机碳通量的趋势既响应酸化恢复又响应径流时间变化。2014年至2019年间发生了一次特殊的干旱。在最近的这段时间里，由于土壤蒸发和植被蒸腾作用增加了≈30％，降水量平均减少了≈15％，因此与1990年代相比，流量平均减少了≈40％。跨海拔梯度。在<650 m asl的集水区，径流径流量急剧减少，这对应于干旱胁迫的云杉林的树皮甲虫侵扰引起的近期森林面积下降。了解酸化和富营养化遗产之间的相互作用，
更新日期：2021-05-25
中文翻译：
捷克流域的GEOMON网络提供了有关改变的森林生物地球化学的长期见解：从酸性大气沉积到气候变化
1994年，捷克共和国建立了一个小流域网络（GEOMON），以确定从人为酸化中恢复的半天然森林生态系统中的投入产出要素通量。该网络由16个流域组成，元素通量的主要观察结果通过监测生物量储备，土壤和植被中的元素库以及主要的水平衡成分得到补充。在过去的三十年中，SO 2，NO x和NH 3排放量的减少之后，硫（S）和氮（N）的沉积量分别减少了75％和30％。与阳离子（Ca，Mg，Na，K，NH 4）导致大量沉淀的pH值从4.5增加到5.2，而云杉穿透的pH值从4.0上升到5.1。流化学反应对沉积的变化作出反应：浸出下降。然而，在大多数流域，土壤充当了径流中硫的净来源，从而延迟了恢复。在酸性物流（pH <6）下，物流pH升高，铝浓度降低。流态硝酸盐（NO 3）的浓度下降了60％，大大超过了氮的沉积量。3号流浓度与水流中总溶解氮与总磷（P）的比例密切相关，表明磷的有效性对氮保留的作用。溶解有机碳通量的趋势既响应酸化恢复又响应径流时间变化。2014年至2019年间发生了一次特殊的干旱。在最近的这段时间里，由于土壤蒸发和植被蒸腾作用增加了≈30％，降水量平均减少了≈15％，因此与1990年代相比，流量平均减少了≈40％。跨海拔梯度。在<650 m asl的集水区，径流径流量急剧减少，这对应于干旱胁迫的云杉林的树皮甲虫侵扰引起的近期森林面积下降。了解酸化和富营养化遗产之间的相互作用，
京公网安备 11010802027423号