N isotopes and N cycle in the TieShanPing subtropical forest ecosystem, Southwestern China

Jiang, Chunlai; Zhang, Xiaoshan

doi:10.1007/s10661-008-0398-z

Cited by 5 publications

(4 citation statements)

References 31 publications

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“…, and the average height and mean diameter at breast height of Masson pine (Kraft class 1-3) were 15.5 m and 193 mm, respectively (Jiang and Zhang 2008;Wang et al 2007). …”

Section: Site Descriptionmentioning

confidence: 98%

Temporal variability of ammonia emission potentials for six plant species in an evergreen subtropical forest in southwest China

Cui

Wang

Zhang

et al. 2017

Environ Sci Pollut Res

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The temporal variability of leaf ammonia (NH 3 ) emission potentials (the ratio of leaf tissue ammonium to proton concentration) and nitrogen (N) pools of six dominant plant species were investigated at the Tieshanping (TSP) forested catchment, southwest China. The results showed that the NH 3 emission potentials and N pools presented small variations among seasons, which were mainly controlled by plant species and the leaf age. Also, high emission potential in one species did not correspond to high tissue N content. Specifically, the Chinese fir (Cunninghamia lanceolata) had higher NH 3 emission potential (mean: 46.2) but lower N content (mean: 1.6% of Dw). The leaf privet (Ligustrum quihoui Carr.) was with the moderate emission potential (15) and the highest N content (2.7% of Dw) on average, which for the Masson pine (Pinus massoniana) were both low. Overall, the emission potentials of the six species were too low (<200) to build up a sufficiently high NH 3 partial pressure in the leaves. Therefore, the Masson pine dominant subtropical forest at TSP acts as a sink for the atmospheric NH 3 , indicating that using the N flux in throughfall only may significantly underestimate the N income of the ecosystem. The results are informative for future modeling of plant-atmosphere NH 3 exchange and estimating N budget in local or regional scales.

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“…, and the average height and mean diameter at breast height of Masson pine (Kraft class 1-3) were 15.5 m and 193 mm, respectively (Jiang and Zhang 2008;Wang et al 2007). …”

Section: Site Descriptionmentioning

confidence: 98%

Temporal variability of ammonia emission potentials for six plant species in an evergreen subtropical forest in southwest China

Cui

Wang

Zhang

et al. 2017

Environ Sci Pollut Res

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“…The increased δ 15 N values in response to higher nitrogen deposition rates such as those observed for Bidens pilosa, Chloris gayana, Chloris virgata, and Pennisetum setaceum, are opposite to those reported for species such as Laelia speciosa and Pinus massonia Lamb., whose leaves become increasingly impoverished in 15 N under higher nitrogen availability (Jiang & Zhang 2009, Díaz-Álvarez et al 2015). An isotopic impoverishment of plant tissues indicates an enhanced discrimination of 15 N under an abundance of nitrogen resulting from increased enzymemediated processes (Yoneyama et al 1991, Santiago et al 2005, Xiao et al 2011).…”

Section: O N L I N E F I R S Tmentioning

confidence: 99%

“…Thus, our results could be an indicator of enzyme saturation that prevented further nitrogen uptake. In addition, the observed isotopic enrichment may also be reflecting an increased loss of excess nitrogen in the plant by NH 4 + volatilization or NO 3 leaching (Högberg & Johannisson 1993, Dijkstra et al 2003, Jiang & Zhang 2009, Ma et al 2012.…”

Section: O N L I N E F I R S Tmentioning

confidence: 99%

Physiological screening of ruderal weed biomonitors of atmospheric nitrogen deposition

Martínez

Barrera²

2021

Bot. Sci.

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Background: Plants take up various species of reactive nitrogen and their different physiological responses to the increase of nitrogen availability can be useful in biomonitoring. Questions: Does atmospheric nitrogen deposition affect the physiology of ruderal weeds? Which species are most responsive to the nitrogen deposition? Studied species: Eleven ruderal weeds. Study site and dates: Morelia, Michoacán, Mexico. 2019. Methods: Under scenarios of 10, 20, 40 and 80 kg N ha-1year-1, we quantified plant responses of biomass production, nitrate reductase activity, chlorophyll content, photosynthetic efficiency, δ15N, nitrogen and carbon content. Results: Total biomass production increased with the rate of nitrogen deposition for Bidens pilosa, Chloris gayana,Lepidium virginicum, and Pennisetum setaceum, as chlorophyll content in B. pilosa, C. gayana, and L. virginicum. In turn, the below- to above-ground biomass ratio decreased for B. pilosa and C. gayana, as photosynthetic efficiency in C. gayana, L. virginicum, and Chloris pycnothrix. Nitrate reductase activity was only affected in L. virginicumm, C. gayana, and T. officinale. With the exception of C. pycnothrix, the nitrogen content increased, while the carbon augmented in C. gayana, C. pycnothrix, and P. setaceum. The C/N ratio was reduced in B. pilosa, C. gayana, Chloris virgata, P. setaceum, and T. officinale. The δ15N was increased in B. pilosa, C. gayana, C. virgata and P. setaceum. Conclusions: Bidens pilosa, C. gayana, L. virginicum, and P. setaceum were the species with more affected variables to nitrogen deposition, which could be useful in the biomonitoring.

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“…High atmospheric N deposition has already been observed in southern China, as in other parts of the world with rapid economic growth (Chen and Mulder, 2007;Jiang and Zhang, 2009;Fang et al, 2009). It has been hypothesized that moist tropical forest ecosystems are more sensitive to anthropogenic N load compared with temperate forest ecosystems (Matson et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen deposition and soil nitrogen dynamics in subtropical evergreen broad-leaved stands along an age-sequence

Zhao

Yao

Wang

et al. 2013

J. Soil Sci. Plant Nutr.

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In order to reveal the effects of nitrogen (N) deposition on forest ecosystems, we investigated the soil N dynamics across a chronosequence of subtropical evergreen broad-leaved forest stands in eastern China for two years. Current atmospheric N deposition was 18 kg ha -1 year -1 . Nitrogen fluxes in throughfall varied from 17 to 23 kg hawith an increasing trend with stand age. The total N fluxes ranged from 7.3 to 9.3 kg ha -1 year -1 under the forest floor and from 1.2 to 2.5 kg ha -1 year -1 at 30-cm soil depth with the high values in the older stand. The net mineralization potentials in the old stands ranged from 19 to 24 mg kg -1 month -1 , and were 30-55% higher than those in the young stands. The inorganic N concentration and flux at 30-cm soil depth were significantly (p < 0.05) correlated with net mineralization potential. The potential N transformation rates were significantly (p < 0.05) correlated with soil C/N ratio and DON while not with forest floor C/N ratio. Input-output budget suggests that the forest at our site is a finer buffering system to N deposition and is far from N saturation.

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N isotopes and N cycle in the TieShanPing subtropical forest ecosystem, Southwestern China

Cited by 5 publications

References 31 publications

Temporal variability of ammonia emission potentials for six plant species in an evergreen subtropical forest in southwest China

Temporal variability of ammonia emission potentials for six plant species in an evergreen subtropical forest in southwest China

Physiological screening of ruderal weed biomonitors of atmospheric nitrogen deposition

Nitrogen deposition and soil nitrogen dynamics in subtropical evergreen broad-leaved stands along an age-sequence

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