Recovery from acidification in the Tillingbourne catchment, southern England: catchment description and preliminary results

Hill, T.J.; Skeffington, R. A.; Whitehead, Paul

doi:10.1016/s0048-9697(01)00939-1

Cited by 20 publications

(22 citation statements)

References 21 publications

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“…As the concentration of N in the soil increases and soils become saturated, though, less N is immobilized in the soil but enters the runoff (Stein and van Breemen, 1993;Moldan and Wright, 1998;Wright et al, 1998;Kahl et al, 1999;Kaste and Skjelvale, 2002;Mitchell et al, 2003;Fang et al, 2008). The loss of nitrates can continue for several years even if N deposition decreases (Hill et al, 2002). Furthermore, N deposition, mainly when accompanied by sulfur deposition, can acidify soil and water and can export cations in the runoff (Nodvin et al, 1995).…”

Section: Eutrophicationmentioning

confidence: 99%

Hydraulic redistribution by plants and nutrient stoichiometry: Shifts under global change

Sardans

Peñuelas²

2014

Ecohydrology

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Hydraulic lift, water movement from deep to upper soil layers by roots, is a widespread process in temperate and semi-arid environments. It can contribute 17-81% of total water transpired and favour the uptake of nutrients available mainly from soil organic matter decomposition (e.g. N). Downward siphoning, water movement from upper to deep soil layers, can represent 10-60% of total transpired water, favouring the uptake of nutrients supplied mainly from the leaching of bedrock minerals (e.g. P and K). These vertical water movements also can affect the N : P ratio of runoff waters when, in the case of hydraulic lift, they open the possibility for a given pulse of water to circulate multiple times across the N-rich upper soil layers. Plants, thus, affect the stoichiometry of nutrients in soils and groundwater not only through the physical protection of the soil and through the water uptake but also through water redistribution. Soil water redistribution can also play an outstanding role in the ecosystem responses to global change drivers. The increase in soil patchiness in current and future arid lands modifies runoff fluxes, hydraulic lift and downward siphoning, allowing plants to dispose of higher water and nutrient availabilities. The higher use of hydraulic lift and/or downward siphoning by alien species is a possible cause of alien plant success. Further mechanistic and quantitative research is thus warranted to discern the plant role in water and nutrient cycling and in the responses to global change.

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Section: Eutrophicationmentioning

confidence: 99%

Hydraulic redistribution by plants and nutrient stoichiometry: Shifts under global change

Sardans

Peñuelas²

2014

Ecohydrology

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“…Despite the reduction of atmospheric acidic depositions in the Northern hemisphere during the last two decades, acidification of freshwater ecosystems is still of concern over vast areas, although some signs of chemical and biological recovery have been reported (Alewell et al 2000;Tipping et al 2000;Fjellheim and Raddum 2001;Prechtel et al 2001;Hill et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Plecoptera response to acidification in several headwater streams in the Vosges Mountains (northeastern France)

Tixier

Guérold

2005

Biodivers Conserv

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Plecoptera are among the most threatened aquatic invertebrates in industrialised countries as they are very sensitive to many types of pollution. On the contrary, stoneflies are largely considered as tolerant to acidification in comparison with many other macroinvertebrate groups. However, an understanding of Plecoptera responses to acidification is lacking due firstly to the complexity of most Nemouroidea specific determinations at larval instars and secondly to the poor Plecoptera diversity in North European countries, where most studies on acidification impact were performed. In the present study, we assess the response of Plecoptera species and species assemblages to freshwater acidification by collecting adults, allowing specific determination. Significant relationships were observed between richness and several chemical parameters. The relative abundance of several species was also significantly correlated to pH and acid neutralizing capacity (ANC). The results highlight the importance of species determination to assess the effects of acidification. Direct effects, i.e. ecotoxicological effects, were not the only factor leading to the erosion of Plecoptera diversity. Finally, this study tends to demonstrate that this order of aquatic insects is more severely affected by freshwater acidification than commonly believed.

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“…This is consistent with an increase in nitrogen saturation of the major soils in the catchment. Hill et al (2002) showed that rainfall nitrate flux decreased from 0.56 to 0. . The other Thames basin study is concerned with the River Lee, which experiences agricultural and urban pollution (Flynn et al, 2002).…”

Section: Nitrogen Dynamics Across Catchmentsmentioning

confidence: 99%

INCA : summary and conclusions

Neal

Whitehead

Flynn

2002

Hydrol. Earth Syst. Sci.

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This contribution brings to a close a special issue of Hydrology and Earth System Sciences concerning the assessment of nitrogen dynamics in catchments across Europe within a semi-distributed Integrated Nitrogen model for multiple source assessment in Catchments (INCA). The wide range of issues involved in relation to hydrology and within-catchment processes, scale (from small catchments to major river basins), climate (from sub-arctic to Mediterranean regimes) and pollution (atmospheric, agricultural and urban sources) is outlined. Consideration is then given to how well the model has performed and future research requirements are outlined.

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Recovery from acidification in the Tillingbourne catchment, southern England: catchment description and preliminary results

Cited by 20 publications

References 21 publications

Hydraulic redistribution by plants and nutrient stoichiometry: Shifts under global change

Hydraulic redistribution by plants and nutrient stoichiometry: Shifts under global change

Plecoptera response to acidification in several headwater streams in the Vosges Mountains (northeastern France)

INCA : summary and conclusions

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