Nitrogen deposition is positively correlated to foliar nitrogen content in Vaccinium myrtillus and other understory species in temperate forests on acidic soil

Roth, Marina; Günther, K.P.; Michiels, Hans-Gerhard; Puhlmann, Heike; Sucker, Carina; Hauck, Markus

doi:10.1016/j.actao.2020.103696

Cited by 8 publications

(4 citation statements)

References 54 publications

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“…Croton floribundus, on the other hand, exhibited very different responses between treatments N and C, besides having less accumulation of N compounds. Our study highlights the importance of assessing more parameters of the N metabolism in addition to total N in leaves because, in many situations, the leaf total N was not affected by the increase in N in the soil, as seen here for C. floribundus and reported by Roth et al [51] for other broad-leaved trees. This species did not present changes in the leaf total N in treatments N or C, but when analyzing different metabolic parameters, an increase in nitrate was found in the leaves.…”

Section: Discussionsupporting

confidence: 80%

Effect of Nitrogen Addition to the Soil on Atlantic Forest Tree Seedlings

Bardy,

Debiasi,

Sanada

et al. 2023

Forests

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The input of large amounts of fertilizers in agricultural areas may result in nitrogen (N) leakage to nearby forest fragments, which can impact the physiology and growth of trees. The current study aimed to assess the effects of soil N addition on seedlings of four tree species in the Brazilian Atlantic Forest: Croton floribundus and Astronium graveolens (pioneer), Guarea kunthiana and Aspidosperma polyneuron (non-pioneer). The experiment was carried out in a greenhouse condition with three treatments: reference (soil without addition of nutrients), N addition (N: soil with addition of ammoniacal-N), and complete (C: soil with addition of ammoniacal-N and other macro and micronutrients). Croton floribundus seedlings presented higher shoot growth with N addition, mainly in treatment C, and only this treatment increased net photosynthesis. There was great variation in the metabolic responses induced by treatments N and C, with accumulation of nitrate in the leaves and xylem sap only in seedlings in treatment N. In A. graveolens, there was a decrease in transpiration in response to treatments N and C. However, water use efficiency, leaf area, and dry mass increased only in seedlings subjected to treatment C. Regarding metabolic parameters, A. graveolens was little responsive to the treatments. In G. kunthiana seedlings, the treatments decreased net photosynthesis and increased leaf total N. Only treatment N led to decreased stem dry mass and increased nitrate contents in leaves and xylem sap. Aspidosperma polyneuron exhibited no change in growth, but there was an accumulation of N compounds in the leaves for both treatments N and C, which suggests that this species could be a good bioindicator of N addition to the soil. Although influencing different parameters, the results indicate that soil N addition affects the performance of both pioneer and non-pioneer species. Finally, the implications of these results for biomonitoring of N availability in the soil of forest fragments are discussed.

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Section: Discussionsupporting

confidence: 80%

Effect of Nitrogen Addition to the Soil on Atlantic Forest Tree Seedlings

Bardy,

Debiasi,

Sanada

et al. 2023

Forests

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“…The N supply from mineralization can be expected to be less variable than from the input by livestock, which might be highly variable due to random fluctuations in the local livestock density given the variable stocking rates in the Mongolian forest‐steppe (Lkhagvadorj et al, 2013a, b; Takatsuki & Morinaga, 2020). The only marginally significant relationship of foliar N with forest size (in contrast to significant correlations between forest size and the C/N ratios in the organic layer and the mineral soil) portends that only parts of the surplus in available N in the small forests was allocated in the foliage to enhance the photosynthetic capacity, whereas another fraction was invested in growth (Aaltonen et al, 2017; Roth et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Drought stress mitigation by nitrogen in boreal forests inferred from stable isotopes

Dulamsuren

Hauck

2021

Global Change Biology

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The productivity of plants in cold-limited ecosystems principally benefits from global warming causing the 'Arctic greening' in the tundra biome (Goetz et al., 2005) and the advancement of many alpine and polar treelines (Esper & Schweingruber, 2004;Harsch et al., 2009;MacDonald et al., 2008). Increased temperatures and improved nitrogen (N) availability as the result of accelerated organic matter decay resulting from a warmer climate trigger this response.The same combination of site factors limiting the productivity in

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“…Foliar N is often used as a proxy for N uptake by vegetation (Kahmen et al, 2008) and has a strong positive relationship with the photosynthetic capacity of leaves (Evans, 1989). However, the relationship between foliar N concentrations and distance to an urban core is not well known, because while foliar N concentrations are positively correlated with rates of atmospheric N deposition (McNeil et al, 2007; Roth, 2021), they are negatively correlated with urbanization metrics such as percent impervious surface area (% ISA; Rao et al, 2013). Foliar N concentration and N resorption proficiency (i.e., the extent to which trees retain N following leaf senescence and abscission) are higher and foliar carbon to N ratios (C:N) are lower in urban compared to rural temperate forests when urbanization is defined by distance to a city center (Chen et al, 2010; Wei & He, 2020).…”

Section: Introductionmentioning

confidence: 99%

Urbanization and fragmentation have opposing effects on soil nitrogen availability in temperate forest ecosystems

Caron

Garvey

Gewirtzman

et al. 2023

Global Change Biology

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Nitrogen (N) availability relative to plant demand has been declining in recent years in terrestrial ecosystems throughout the world, a phenomenon known as N oligotrophication. The temperate forests of the northeastern U.S. have experienced a particularly steep decline in bioavailable N, which is expected to be exacerbated by climate change. This region has also experienced rapid urban expansion in recent decades that leads to forest fragmentation, and it is unknown whether and how these changes affect N availability and uptake by forest trees. Many studies have examined the impact of either urbanization or forest fragmentation on nitrogen (N) cycling, but none to our knowledge have focused on the combined effects of these co‐occurring environmental changes. We examined the effects of urbanization and fragmentation on oak‐dominated (Quercus spp.) forests along an urban to rural gradient from Boston to central Massachusetts (MA). At eight study sites along the urbanization gradient, plant and soil measurements were made along a 90 m transect from a developed edge to an intact forest interior. Rates of net ammonification, net mineralization, and foliar N concentrations were significantly higher in urban than rural sites, while net nitrification and foliar C:N were not different between urban and rural forests. At urban sites, foliar N and net ammonification and mineralization were higher at forest interiors compared to edges, while net nitrification and foliar C:N were higher at rural forest edges than interiors. These results indicate that urban forests in the northeastern U.S. have greater soil N availability and N uptake by trees compared to rural forests, counteracting the trend for widespread N oligotrophication in temperate forests around the globe. Such increases in available N are diminished at forest edges, however, demonstrating that forest fragmentation has the opposite effect of urbanization on coupled N availability and demand by trees.

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Nitrogen deposition is positively correlated to foliar nitrogen content in Vaccinium myrtillus and other understory species in temperate forests on acidic soil

Cited by 8 publications

References 54 publications

Effect of Nitrogen Addition to the Soil on Atlantic Forest Tree Seedlings

Effect of Nitrogen Addition to the Soil on Atlantic Forest Tree Seedlings

Drought stress mitigation by nitrogen in boreal forests inferred from stable isotopes

Urbanization and fragmentation have opposing effects on soil nitrogen availability in temperate forest ecosystems

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