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首页> 外文期刊>Aquatic Sciences >Climate change accelerates recovery of the Tatra Mountain lakes from acidification and increases their nutrient and chlorophyll a concentrations
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Climate change accelerates recovery of the Tatra Mountain lakes from acidification and increases their nutrient and chlorophyll a concentrations

机译：气候变化加速了塔特拉山湖泊从酸化中的恢复，并增加了其养分和叶绿素a的浓度

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摘要

We evaluated changes in the concentration of cations, anions, nutrients (dissolved organic carbon, DOC; phosphorus, P; and nitrogen forms including nitrate, NO3- and total organic nitrogen, TON), and chlorophyll a (Chl-a) in 31 Tatra Mountain lakes in Slovakia and Poland during their recovery from acidic deposition (1992-2018). Typical effects of decreasing acidic deposition on the lakes' water composition, such as decreasing base cation concentrations, were confounded by climate change and catchment characteristics, including areal proportions of well-developed soils and scree. A climate-related increase in physical erosion provided freshly exposed unweathered granodiorite (the dominant bedrock) to chemical weathering. Dissolution of accessory calcite in the granodiorite increased the in-lake Ca2+ and HCO3- concentrations and reversed the Ca2+ trends, which originally decreased in parallel with strong acid anions. These changes were most pronounced in steep, scree-rich areas, which are most sensitive to physical weathering. Fresh apatite [Ca-5(PO4)(3)(F, Cl, OH)] in the crushed granodiorite acts as a P source at soil pH's between 4 and 5 and in the presence of chelating organic acids within soils. These conditions enhance apatite solubility, which in part explains increasing P in lakes with scree-dominated catchments. Soil recovery from acidification due to decreasing acidic deposition and the neutralizing effect of weathering of erosion-derived accessory calcite were the most likely causes of elevated DOC and P export from soils. Their elevated leaching was accompanied by increasing in-lake concentrations of Chl-a and TON. The increasing TON concentrations were, as for Ca2+, most pronounced in the scree-rich catchments, and represented the most sensitive indicator of the changes in the lake water nutrient composition.
机译：我们评估了31 Tatra中阳离子，阴离子，养分（溶解的有机碳，DOC，磷，磷和氮的形式，包括硝酸盐，NO3-和总有机氮，TON）和叶绿素a（Chl-a）浓度的变化。斯洛伐克和波兰的高山湖泊从酸性沉积中恢复期间（1992-2018年）。减少酸性沉积物对湖泊水组成的典型影响（例如降低碱性阳离子浓度）与气候变化和集水特征（包括发达土壤和碎石的面积比例）混淆。与气候有关的物理侵蚀增加使刚暴露的未风化花岗闪长岩（占主导地位的基岩）遭受化学风化。副方解石在花岗闪长岩中的溶解增加了湖中Ca2 +和HCO3-的浓度，并逆转了Ca2 +的趋势，而Ca2 +的趋势最初与强酸阴离子平行下降。这些变化在陡峭，卵石丰富的地区最为明显，这些地区对物理风化最敏感。压碎的花岗闪长岩中的新鲜磷灰石[Ca-5（PO4）（3）（F，Cl，OH）]在土壤pH值为4至5且土壤中存在有机酸螯合的情况下充当P源。这些条件提高了磷灰石的溶解度，这在一定程度上解释了卵石为主的集水区湖泊中磷的增加。由于减少了酸性沉积而从酸化中恢复的土壤以及侵蚀引起的方解石的风化对土壤的中和作用是土壤中DOC和P出口增加的最可能原因。它们的高浸出伴随着湖中Chl-a和TON浓度的增加。就Ca2 +而言，增加的TON浓度在富含卵石的集水区中最为明显，并且是湖泊水养分组成变化的最敏感指标。

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