Importance of ammonium and nitrate to the performance of herb-layer species from deciduous forests in Southern Sweden

Falkengren‐Grerup, Ursula; Kristensen, Hanne Lakkenborg

doi:10.1016/0098-8472(94)90006-x

Cited by 42 publications

(16 citation statements)

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“…Processes associated with N transformation in soils, including mineralization and nitrification, depend on soil pH, which determine homeostasis of NH 4 -N and NO 3 -N (Dorland et al, 2004). Although it has been reported that species from acidic and alkaline soils usually prefer different forms of nitrogen (Falkengren-Grerup and Lakkenborg-Kristensen, 1994;van den Berg et al, 2005), both high NO (Britto and Kronzucher, 2002;Tian et al, 2005Tian et al, , 2009Zhao et al, 2007). Therefore, it is necessary to further dynamically monitor changes in N forms in soils after N addition and to evaluate the different response of forbs and graminoids to different N forms.…”

Section: Variablesmentioning

confidence: 99%

Disruption of metal ion homeostasis in soils is associated with nitrogen deposition-induced species loss in an Inner Mongolia steppe

et al. 2015

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Abstract. Enhanced deposition of atmospheric nitrogen (N) resulting from anthropogenic activities has negative impacts on plant diversity in ecosystems. Several mechanisms have been proposed to explain the species loss. Ion toxicity due to N deposition-induced soil acidification has been suggested to be responsible for species loss in acidic grasslands, while few studies have evaluated the role of soil-mediated homeostasis of ions in species loss under elevated N deposition in grasslands with neutral or alkaline soils. To determine whether soil-mediated processes are involved in changes in biodiversity induced by N deposition, the effects of 9-year N addition on soil properties, aboveground biomass (AGB) and species richness were investigated in an Inner Mongolia steppe. Low to moderate N addition rate (2, 4, 8 g N m −2 yr −1 ) significantly enhanced AGB of graminoids, while high N addition rate (≥ 16 g N m −2 yr −1 ) reduced AGB of forbs, leading to an overall increase in AGB of the community under low to moderate N addition rates. Forb richness was significantly reduced by N addition at rates greater than 8 g N m −2 yr −1 , while no effect of N addition on graminoid richness was observed, resulting in decline in total species richness. N addition reduced soil pH, depleted base cations (Ca 2+ , Mg 2+ and K + ) and mobilized Mn 2+ , Fe 3+ , Cu 2+ and Al 3+ ions in soils. Soil inorganic-N concentration was negatively correlated with forb richness and biomass, explaining 23.59 % variation of forb biomass. The concentrations of base cations (Ca 2+ and Mg 2+ ) and metal ions (Mn 2+ , Cu 2+ and, Fe 3+ ) showed positively and negatively linear correlation with forb richness, respectively. Changes in the metal ion concentrations accounted for 42.77 % variation of forb richness, while reduction of base cations was not associated with the reduction in forb richness. These results reveal that patterns of plant biodiversity in the temperate steppe of Inner Mongolia are primarily driven by increases in metal ion availability, particularly enhanced release of soil Mn 2+ .

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Section: Variablesmentioning

confidence: 99%

Disruption of metal ion homeostasis in soils is associated with nitrogen deposition-induced species loss in an Inner Mongolia steppe

et al. 2015

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“…Selective preferences for ammonia and nitrate can explain main patterns in plant associations [85]. Soil types differ substantially in ammonia and nitrate availability for plants [266], and their ratio strongly influences the occurrence of plant species, even at a very small spatial scale, such as the shifting mosaic of gap and understory conditions in a forest [180,534]. Probably because of its toxicity, ammonium assimilation occurs in the roots and not in the shoots of plants.…”

Section: Ammonia-nitrate Interactionsmentioning

confidence: 99%

Dynamic Energy and Mass Budgets in Biological Systems

Kooijman

2000

800

1,202

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second editionDynamic Energy Budget theory unifies the commonalities between organisms as prescribed by the implications of energetics, which link different levels of biological organization (cells, organisms and populations). The theory presents simple mechanistic rules that describe the uptake and use of energy and nutrients and the consequences for physiological organization throughout an organism's life cycle, including the relationships between energetics and aging and the effects of toxicants. In this new edition, the theory is broadened to encompass the fluxes of both energy and mass. All living organisms are now covered in a single quantitative framework, the predictions of which are tested against a wide variety of experimental results at the various levels of biological organization. The theory explains many general observations, such as the body size scaling relationships of certain physiological traits, and provides a theoretical basis for the widely used method of indirect calorimetry. In each case, the theory is developed in elementary mathematical terms, but a more detailed discussion of the methodological aspects of mathematical modelling is also included, making the book suitable for biologists and mathematicians with a broad interest in both fundamental and applied quantitative problems in biology.Bas Kooijman is Professor of Applied Theoretical Biology at the Vrije Universiteit in Amsterdam and is also head of the University's Department of Theoretical Biology. His research focuses on mathematical biology, in particular ecotoxicology which provided the framework for the original version of his Dynamic Energy Budget theory published in 1993 (Dynamic Energy Budgets in Biological Systems -Theory and Applications in Ecotoxicology). From the first edition:"This book is an excellent scientific product that informs and forces contemplation of issues relating to population and community ecology. The author has made a complex subject coherent." Thomas G. Hallam, Bulletin of Mathematical Biology "... a very useful and general tool to select more ecologically sound process equations and parameters in ecological models." Sven Erik Jørgensen, Ecological Modelling "The author has made a significant contribution to the problem of modelling the dynamics of biological populations at the level of the individual by synthesizing this very complicated subject into a relatively short list of general assumptions and putting the energetics of sub-models for vital rates on a solid basis." Jim Cushing, Mathematical Biosciences "The family of idealized models offered in this book is capable of playing a role analogous to that of Lotka-Volterra models in population dynamics ... I am confident that any model(s) capable of occupying this niche will be strongly influenced by the ideas in this book." Roger Nisbet, Ecology 9 LIVING TOGETHER Interaction between organisms: The spectrum from competition to preypredator systems. Evaluation of the consequences of the DEB model for population dynamics, food chains, and communities....

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“…50 However, in some other habitats; for example in calcareous grasslands, gradient surveys 51 have shown no significant association between N deposition and species richness (Maskell 52 et al 2010). However, high rates of N deposition have been associated in calcareous 53 grassland plots with an increase in grass:forb ratio (Maskell et al 2010) and a decline in 54 species diversity and in the frequency of characteristic species (van den Berg et al 2011).…”

mentioning

confidence: 99%

“…For example, foliar uptake of gaseous NH3 is more likely to be directly 20 toxic than uptake of gaseous nitrogen oxides, while soil NH4 + is more likely to be toxic to 21 plant roots than soil NO3 - (Sheppard et al 2011, Sheppard et al 2014). Plant species also 22 differ strongly in their preference and tolerance for NH4 + or NO3 -uptake from soil solution 23 with species of acidic habitats generally more tolerant of higher soil ammonium 24 (Falkengrengrerup and Lakkenborgkristensen 1994). The soil NH4 + /NO3 -ratio is partly a 25 function of the ratio in atmospheric deposition, but also of the degree of nitrification in 26 soils; high rates of nitrification result in a lower soil solution NH4 + /NO3 -ratio, which may 27 reduce the risk of direct NH4 + toxicity but may increase acidification because of the greater 28 oxidation to NO3 -.…”

mentioning

confidence: 99%

“…10 The vegetation in each plot was classified according to the UK National Vegetation In the first method (models coded with A), the effect of NHx/NOy ratio in deposition was 53 tested against the effects of total N deposition. For this analysis, multiple regressions were 54 performed with dependent variables: species richness, cover weighted Ellenberg N 55 (hereafter Ellenberg N) and grass:forb ratio that were regressed on the explanatory 56 variables: total N deposition, NHx/NOy ratio, S deposition, precipitation and temperature. All 57 models were at first explicitly tested for spatial autocorrelation in the response variable and 58 residuals by inspection of semi-variograms using generalized linear mixed-effect models 59 (GLMM).…”

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confidence: 99%

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Evidence for differential effects of reduced and oxidised nitrogen deposition on vegetation independent of nitrogen load

Berg

Jones

Sheppard

et al. 2016

Environmental Pollution

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Article (refereed) -postprint van den Berg, Leon J.L.; Jones, Laurence; Sheppard, Lucy J.; Smart, Simon M.; Bobbink, Roland; Dise, Nancy B.; Ashmore, Mike R. 2016. Evidence for differential effects of reduced and oxidised nitrogen deposition on vegetation independent of nitrogen load.Contact CEH NORA team at noraceh@ceh.ac.ukThe NERC and CEH trademarks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner.

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Importance of ammonium and nitrate to the performance of herb-layer species from deciduous forests in Southern Sweden

Cited by 42 publications

References 18 publications

Disruption of metal ion homeostasis in soils is associated with nitrogen deposition-induced species loss in an Inner Mongolia steppe

Disruption of metal ion homeostasis in soils is associated with nitrogen deposition-induced species loss in an Inner Mongolia steppe

Dynamic Energy and Mass Budgets in Biological Systems

Evidence for differential effects of reduced and oxidised nitrogen deposition on vegetation independent of nitrogen load

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