Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Stable Carbon Isotope (δ13C) Composition in Leaf of Pinus Sylvestris var. mongolica in Hulunbuir and its Relationship with Ecological Stoichiometry and Environmental Factors

Version 1 : Received: 21 June 2021 / Approved: 22 June 2021 / Online: 22 June 2021 (14:36:01 CEST)

How to cite: Ren, B.; Qiu, S.; Shen, C.; Wang, P. Stable Carbon Isotope (δ13C) Composition in Leaf of Pinus Sylvestris var. mongolica in Hulunbuir and its Relationship with Ecological Stoichiometry and Environmental Factors. Preprints 2021, 2021060551 (doi: 10.20944/preprints202106.0551.v1). Ren, B.; Qiu, S.; Shen, C.; Wang, P. Stable Carbon Isotope (δ13C) Composition in Leaf of Pinus Sylvestris var. mongolica in Hulunbuir and its Relationship with Ecological Stoichiometry and Environmental Factors. Preprints 2021, 2021060551 (doi: 10.20944/preprints202106.0551.v1).

Abstract

The decline in Pinus sylvestris var. mongolica in the introduction area has had a high profile in recent years. For the ecological restoration, management and silvicultural design of Mongolian pines in the introduction area, it is necessary to conduct a comprehensive and in-depth study on the ecological adaptation mechanism of Mongolian pines in provenances. The ecological process of water and nutrient accumulation as well as the influence of environmental factors on the photosynthetic physiology are the key to revealing the ecological adaptation mechanism of Mongolian pines. According to the differences of climate in the distribution area of Mongolian pines, sampling sites were set up, the effects of environmental factors on leaf δ13C and the relationship between leaf δ13C and nutrient content were analyzed. The results showed that leaf δ13C values were ranging from - 29.7 ‰ to - 23.76 ‰. The ecological stoichiometry, including LC (522.81 mg·g-1), LN (16.04 mg·g-1), LP (1.19 mg·g-1) and L-N:P (13.56), indicated that leaf photosynthesis and water use efficiency is greatly affected by environmental conditions, Mongolian pines had strong ability of carbon fixation, and its growth was obviously restricted by nitrogen. Although there was no significant correlation between δ13C with stoichiometric parameters in leaf, photosynthesis was the key link in the process of carbon fixation. It also showed that Pinus sylvestris var. mongolica was a stomatal limited plant. Leaf δ13C had significant correlation with climatic factors. VPD is the dynamic factor affecting the photosynthetic physiological process in leaves. Air and soil moisture are the dominate factors affecting the leaf stomatal conductance and determines leaf δ13C value, while other factors indirectly affect leaf δ13C by its impact on relative humidity or soil water content. Soil phosphorus content affected by clay is a key factor affecting soil water availability and soil nutrient cycling. Photosynthetic process in leaf is the dynamic process affecting the nutrient accumulation.

Subject Areas

Pinus sylvestris var. mongolica; stable carbon isotope (δ13C); ecological stoichiometry; environmental factors

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.