Ammonium and nitrate tolerance in lichens

Hauck, Markus

doi:10.1016/j.envpol.2009.12.036

Cited by 80 publications

(94 citation statements)

References 88 publications

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“…Johansson et al (2010) and Hauck (2010) suggested dose-dependent responses to explain this. Lichens show preferential retention for NH 4 + when they are exposed to high doses of N but do not at low doses.…”

Section: Naturalmentioning

confidence: 99%

fate of 15N-labeled ammonium and nitrate applied on trees canopy in a mature balsam-fir stand, Quebec /

Gélinas-Pouliot¹

2013

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Canopy uptake of atmospherically deposited nitrogen (N) NO 3~ was found in aboveground vegetation (64.3 and 70.7%, respectively) as compared to the litter layer (L) and soil organic horizons (FH) (35.7 and 29.4%, respectively). Overall, twigs showed the highest recovery for both ions (49.9 and 63.0%, respectively). Contrary to studies where N is added directly to the soils, these data show that aboveground biomass may capture N in amounts comparable to or higher than the soil when the tracer is applied in situ directly on the canopy in a way that reproduces natural N deposition processes.

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Section: Naturalmentioning

confidence: 99%

fate of 15N-labeled ammonium and nitrate applied on trees canopy in a mature balsam-fir stand, Quebec /

Gélinas-Pouliot¹

2013

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“…This suggests that the oligotrophic functional group is more sensitive to increasing N availability than the nitrophytic one and/or that the nitrophytic functional group may require higher [NH 3 ] atm or N dep driven by N red to respond . The differences between the response of nitrophytic and oligotrophic species to N dep or [NH 3 ] atm could be related to the capacity of nitrophytic species to prevent the accumulation of N in the cells, (GaioOliveira et al, 2005) which can be due to the capacity to provide sufficient carbon for N metabolism (Hauck, 2010). However, the mechanism by which excessive N influences lichens is currently under debate.…”

Section: Sensitivity Of Nitrophytic and Oligotrophic Lichensmentioning

confidence: 99%

Critical loads of nitrogen deposition and critical levels of atmospheric ammonia for semi-natural Mediterranean evergreen woodlands

et al. 2012

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Abstract. Nitrogen (N) has emerged in recent years as a key factor associated with global changes, with impacts on biodiversity, ecosystems functioning and human health. In order to ameliorate the effects of excessive N, safety thresholds such as critical loads (deposition fluxes) and levels (concentrations) can be established. Few studies have assessed these thresholds for semi-natural Mediterranean ecosystems. Our objective was therefore to determine the critical loads of N deposition and long-term critical levels of atmospheric ammonia for semi-natural Mediterranean evergreen woodlands. We have considered changes in epiphytic lichen communities, one of the most sensitive comunity indicators of excessive N in the atmosphere. Based on a classification of lichen species according to their tolerance to N we grouped species into response functional groups, which we used as a tool to determine the critical loads and levels. This was done for a Mediterranean climate in evergreen cork-oak woodlands, based on the relation between lichen functional diversity and modelled N deposition for critical loads and measured annual atmospheric ammonia concentrations for critical levels, evaluated downwind from a reduced N source (a cattle barn). Modelling the highly significant relationship between lichen functional groups and annual atmospheric ammonia concentration showed the critical level to be below 1.9 µg m −3 , in agreement with recent studies for other ecosystems. Modelling the highly significant relationship between lichen functional groups and N deposition showed that the critical load was lower than 26 kg (N) ha −1 yr −1 , which is within the upper range established for other semi-natural ecosystems. Taking into account the high sensitivity of lichen communities to excessive N, these values should aid development of policies to protect Mediterranean woodlands from the initial effects of excessive N.

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“…To detect the chemical composition more than 300 samples of Parmelia sulcate were gathered and described. To map the zones of urban pollution we relied on the lichens idiosyncrasies to accumulate pollutants in thallus [20]- [22]. We found out Parmelia sulcate in all the sites.…”

Section: Resultsmentioning

confidence: 99%

Monitoring Air Quality Using Lichens in Chelyabinsk, Russian Federation

Kostryukova¹

2017

GEOMATE

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Air pollution in large cities is one of the most serious ecological problems, because emissions always go into the atmosphere. One of the specific methods of pollution monitoring is lichen indication. The aim of the study is to evaluate the quality of the atmospheric air of Chelyabinsk city (Russian Federation). The results were obtained from samples collected in June-July 2015. The trees for the lichen sampling were chosen from the areas with different pollution levels: relatively clean, moderately polluted, hardly polluted. For the purposes of the comparison lichens were measured in Ilmen reserve, as the protected relatively clean territory. Using the method of lichen indication mapping we identified an indicator species Parmelia sulcate. Based upon epiphytic lichen distribution in sampling areas we distinguished several zones of atmospheric pollution: polluted zone, relatively clean zone, the cleanest zone. Lichen biodiversity and their projective cover are stated to decrease as the anthropogenic load is increasing. In urban and anthropogenic environment lichen population density is declining more intensively than the number of species. Also we measured elemental composition of lichens by X-ray fluorescence (XRF) analysis. We have studied the presence of heavy metals. Zink oxide, chrome and mangan oxide rate in the samples from environmentally troubled areas near steel factories and the power plantis almost twice higher.

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Ammonium and nitrate tolerance in lichens

Cited by 80 publications

References 88 publications

fate of 15N-labeled ammonium and nitrate applied on trees canopy in a mature balsam-fir stand, Quebec /

fate of 15N-labeled ammonium and nitrate applied on trees canopy in a mature balsam-fir stand, Quebec /

Critical loads of nitrogen deposition and critical levels of atmospheric ammonia for semi-natural Mediterranean evergreen woodlands

Monitoring Air Quality Using Lichens in Chelyabinsk, Russian Federation

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