The effect of nitrogen additions on oak foliage and herbivore communities at sites with high and low atmospheric pollution

Jones, Michele Eatough; Paine, Timothy D.; Fenn, Mark E.

doi:10.1016/j.envpol.2007.04.020

Cited by 31 publications

(7 citation statements)

References 29 publications

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“…The abundance of sucking insects, leafrollers and plutellids, on Abies concolor (California black oaks) also responded positively to N fertilisation at a polluted site in California (Eatough Jones, Paine, & Fenn, 2008). Increases in abundance of herbivores considered pest species have also been observed.…”

Section: Folivorous Insectsmentioning

confidence: 94%

“…For example herbivore abundance, and particularly the abundance of sawflies and a rachis mining lepidopteran, increased along with Pteridium aquilinum (bracken) biomass with N fertilisation (Eatough Jones, Fenn, & Paine, ). The abundance of sucking insects, leafrollers and plutellids, on Abies concolor (California black oaks) also responded positively to N fertilisation at a polluted site in California (Eatough Jones, Paine, & Fenn, ). Increases in abundance of herbivores considered pest species have also been observed.…”

Section: Impacts On Higher Trophic Levelsmentioning

confidence: 99%

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Atmospheric nitrogen deposition in terrestrial ecosystems: Its impact on plant communities and consequences across trophic levels

2018

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The global nitrogen cycle has been greatly perturbed by human activities resulting in elevated nitrogen deposition in many parts of the world. The threat nitrogen deposition poses to ecosystem function and biodiversity is increasingly recognised. In terrestrial systems, impacts on the plant community are mainly through eutrophication and soil acidification. Interactions with secondary environmental drivers such as extreme weather and disease are also key mechanisms. Impacts on consumers can be caused by changes in the quality or quantity of food as a result of changes in food plant chemistry or species composition, changes in vegetation structure leading to a change in the availability of prey species, nesting sites or cooled microclimates or changes in the phenology of plants leading to causing phenological asynchrony. Primary consumers have received considerably less research attention than plants but negative impacts have been observed for both folivorous insects and pollinators. Mammal herbivores have received little research attention. New analysis of changes in plant traits along a gradient of nitrogen deposition in the UK shows that plants pollinated by large bees were negatively associated with N deposition whilst low pH was associated with lower nectar production, reduced occurrence of plants pollinated by long‐tongued insects and a reduction in plants with larger floral units. Very few studies have investigated the effects on secondary consumers, but those that have suggest that there are likely to be negative impacts. This review identifies considerable knowledge gaps in the impacts of N deposition on higher tropic levels and highlights that for many groups, knowledge of N deposition impacts is patchy at best. Evidence that has been collected suggests that there are likely to be impacts on primary and secondary consumers making this a priority area for investigation.

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Section: Folivorous Insectsmentioning

confidence: 94%

Section: Impacts On Higher Trophic Levelsmentioning

confidence: 99%

Atmospheric nitrogen deposition in terrestrial ecosystems: Its impact on plant communities and consequences across trophic levels

2018

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“…For leaf nutrients, we chose phosphorus and nitrogen concentration because both of these variables are strongly (positively) correlated with levels of leaf herbivory across many plant taxa (Karban, 1992; Huberty and Denno, 2006), and previous work has reported such correlations for other oak species (e.g., Forkner et al, 2004; Eatough Jones et al, 2008). We digested approximately 0.1 g of grounded leaf material in a mixture of selenous sulphuric acid and hydrogen peroxide (Moreira et al, 2012).…”

Section: Methodsmentioning

confidence: 99%

Biotic and abiotic factors associated with altitudinal variation in plant traits and herbivory in a dominant oak species

Abdala‐Roberts

Rasmann

Teran

et al. 2016

American J of Botany

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“…Plant NO − 3 concentrations are indicators or predictors of the soil N cycle (e.g., soil nitrification and soil NO − 3 ) and forest N pollution (Stams and Schipholt, 1990; Aber et al, 1998; Fenn and Poth, 1998; Koba et al, 2003). Such concentrations show higher sensitivities than bulk N and NRA parameters in revealing species-level responses to N enrichment (Fenn et al, 1996; Jones et al, 2008; Tang et al, 2012). The increase in NO − 3 concentration in roots and or leaves with external NO − 3 was observed under both natural soil conditions and experimental N addition (e.g., Stewart et al, 1993; Lexa and Cheeseman, 1997; Wang and Schjoerring, 2012).…”

Section: Concentration Levels and Implications Of No−3 In Natural Plantsmentioning

confidence: 99%

Nitrate dynamics in natural plants: insights based on the concentration and natural isotope abundances of tissue nitrate

et al. 2014

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The dynamics of nitrate (NO−3), a major nitrogen (N) source for natural plants, has been studied mostly through experimental N addition, enzymatic assay, isotope labeling, and genetic expression. However, artificial N supply may not reasonably reflect the N strategies in natural plants because NO−3 uptake and reduction may vary with external N availability. Due to abrupt application and short operation time, field N addition, and isotopic labeling hinder the elucidation of in situ NO−3-use mechanisms. The concentration and natural isotopes of tissue NO−3 can offer insights into the plant NO−3 sources and dynamics in a natural context. Furthermore, they facilitate the exploration of plant NO−3 utilization and its interaction with N pollution and ecosystem N cycles without disturbing the N pools. The present study was conducted to review the application of the denitrifier method for concentration and isotope analyses of NO−3 in plants. Moreover, this study highlights the utility and advantages of these parameters in interpreting NO−3 sources and dynamics in natural plants. We summarize the major sources and reduction processes of NO−3 in plants, and discuss the implications of NO−3 concentration in plant tissues based on existing data. Particular emphasis was laid on the regulation of soil NO−3 and plant ecophysiological functions in interspecific and intra-plant NO−3 variations. We introduce N and O isotope systematics of NO−3 in plants and discuss the principles and feasibilities of using isotopic enrichment and fractionation factors; the correlation between concentration and isotopes (N and O isotopes: δ18O and Δ17O); and isotope mass-balance calculations to constrain sources and reduction of NO−3 in possible scenarios for natural plants are deliberated. Finally, we offer a preliminary framework of intraplant δ18O-NO−3 variation, and summarize the uncertainties in using tissue NO−3 parameters to interpret plant NO−3 utilization.

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The effect of nitrogen additions on oak foliage and herbivore communities at sites with high and low atmospheric pollution

Cited by 31 publications

References 29 publications

Atmospheric nitrogen deposition in terrestrial ecosystems: Its impact on plant communities and consequences across trophic levels

Atmospheric nitrogen deposition in terrestrial ecosystems: Its impact on plant communities and consequences across trophic levels

Biotic and abiotic factors associated with altitudinal variation in plant traits and herbivory in a dominant oak species

Nitrate dynamics in natural plants: insights based on the concentration and natural isotope abundances of tissue nitrate

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