Carbon and nitrogen storage and distribution in different forest ecosystems in the subalpine of western Sichuan

Shun, 刘顺 Liu; Da, 罗达 Luo; Qianli, 刘千里 Liu; Li, 张利 Zhang; Hongguo, 杨洪国 Yang; Zuomin, 史作民 Shi

doi:10.5846/stxb201604150688

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…C is the skeleton element and structural substance of life [4]; as the assimilation product of photosynthesis, it is the material basis and energy source of physiological and biochemical processes in plants. Meanwhile, N, P, and K are important constituents of organic matter, such as amino acids, proteins, and nucleic acids, in plants undergoing plant growth and development and metabolic processes; they are equally important elements for determining the type of vegetation limitation [5][6][7]. C:N, C:P, and C:K indicators can reflect the efficiency of a plant's use of nutrients, control many physiological and biochemical processes in plants, and determine the C, N, and P use, storage, and transfer in ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Stoichiometric Characteristics of Abies georgei var. smithii Plants in Southeast Tibet

et al. 2023

Sustainability

View full text Add to dashboard Cite

In order to elucidate the adaptation mechanisms of the stoichiometric characteristics of Abies georgei var. smithii in southeastern Tibet to different habitats, the spatial and temporal dynamics of the nutrient contents and stoichiometric ratios among the leaf, branch, stem, and root organs were analyzed on Sejila Mountain in southeastern Tibet at different elevations (3500 m, 3900 m, and 4300 m). The results show that (1) the C and K contents of the fir organs did not change significantly with increasing elevation in the same season, while the N and P contents showed an overall increasing trend with increasing elevation, with the C and N contents being the highest in the leaves. The distribution order was leaves > branches > roots > stem; the P and K content order in each organ was branches > leaves > roots > stem. (2) At the same elevation and in different seasons, the Abies georgei var. smithii organs showed a similar convergence in terms of nutrient storage and utilization strategies, and more nutrients were optimally allocated between the assimilated and stored organs in the alpine habitats, which represents a “trade-off” strategy. (3) Compared to the findings of the global-scale studies, this study area has low N, P, and K contents, and its growth is limited by both N and P. Due to physiological and nutrient balance constraints, the content of the N-limited elements in the plants is relatively stable, which is in line with the “limiting element stability hypothesis”. (4) Principal component analysis showed that the influence of environmental factors on the stoichiometric characteristics of the different organs of Abies georgei var. smithii had a spatial scale effect, and that Abies georgei var. smithii demonstrated increased accumulation of N and P contents when subjected to environmental stress, which promoted the domestication and adaptation of the plant, enabling it to show good nutrient accumulation capacity and good adaptation strategies even at high elevation; thus, it has become a pioneer tree species at high elevations. This research work shows that the resilient adaptation of Abies georgei var. smithiir to environmental change has led to differences in the nutrient uptake and use efficiency and the adaptation patterns of the organs at different altitudinal gradients, with each organ adapting to habitat changes by adjusting its nutrient storage strategy between habitats.

show abstract

Section: Introductionmentioning

confidence: 99%

Stoichiometric Characteristics of Abies georgei var. smithii Plants in Southeast Tibet

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

Seasonal soil-plant nitrogen dynamics of a cordgrass salt marsh in response to coastal embankments in Eastern China

Qin

Feng

Zhao³

et al. 2022

Front. Mar. Sci.

View full text Add to dashboard Cite

The effects of coastal embankments on nitrogen (N) cycling in the Spartina alterniflora salt marsh have been extensively reported. However, it remains unclear effects of the embankment on the sizes of diverse N subpools in the plant-soil subsystems year-round. This study examined seasonal changes in various N subpools of plant subsystems; soil subsystems [e.g., soil organic N (SON), recalcitrant organic N (RON), labile organic N (LON), dissolved organic N (DON), ammonium N(NH+4 N), and nitrate N(NO3-N)]; N mineralization [e.g., soil net ammonification (RA) and nitrification (RN) rate]; and immobilization [e.g., microbial biomass N (MBN)] in embanked and adjacent S. alterniflora natural salt marshes on the coast of Eastern China. The embankment significantly reduced the litter N storage by 62.7–71.8% over the four seasons and decreased the root N storage by 53.0% during winter. The SON, LON, RON, and N H +4 N concentrations declined significantly by 43.0–60.2%, 35.8–64.8%, 44.9–59.0%, and 20.8–42.2%, respectively, over the four seasons following the embankment construction. Furthermore, the embankment dramatically reduced the DON concentrations by 21.9% in spring, 14.6% in summer, and 10.4% in winter, while notably diminishing the NO3 N concentrations by 33.4% in autumn and 44.9% in winter, and the RA and RN in spring and summer. However, the embankment clearly increased the MBN concentrations during summer and autumn, the NO3 N concentrations in spring, and the RA and RN in winter at different levels. Due to the decreased soil N inputs from plants, the embankment decreased the organic and inorganic N subpools every season to varying degrees, except for the NO3 N concentration in spring. We suggest that the decreased soil salinity following embankment establishment might increase the uptake of ions by microbes, while stimulating the production of MBN. Ultimately, the NO3 N and DON were two vital N sources for S. alterniflora, and plants absorbed N from the soil to promote their biomass, as well as N concentration and storage. This study is conducive toward understanding the mechanisms behind the effects of coastal embankments on the N transfer among various N subpools in the plant and soil systems.

show abstract

Forest understory vegetation study: current status and future trends

Deng¹,

Fang²,

Fang³

et al. 2023

View full text Add to dashboard Cite

Carbon and nitrogen storage and distribution in different forest ecosystems in the subalpine of western Sichuan

Cited by 3 publications

References 0 publications

Stoichiometric Characteristics of Abies georgei var. smithii Plants in Southeast Tibet

Stoichiometric Characteristics of Abies georgei var. smithii Plants in Southeast Tibet

Seasonal soil-plant nitrogen dynamics of a cordgrass salt marsh in response to coastal embankments in Eastern China

Forest understory vegetation study: current status and future trends

Contact Info

Product

Resources

About