Light and competition alter leaf stoichiometry of introduced species and native mangrove species

Zhu, Dehuang; Hui, Dafeng; Wang, Mengqi; Yang, Qiong; Yu, Shixiao

doi:10.1016/j.scitotenv.2020.140301

Cited by 36 publications

(18 citation statements)

References 91 publications

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“…However, the leaf stoichiometry of P. fruticosa at high elevations on the Qinghai–Tibetan Plateau (QTP) remains relatively undocumented. Leaf stoichiometry can reflect the balance and limitations in the uptake of plant macronutrients (C, N, P) that influence plants’ growth rate and life history strategies ( Baxter and Dilkes, 2012 ; Zhu et al, 2020 ) and global C, N, P biogeochemical cycles ( Moe et al, 2005 ; Liu et al, 2018 ). Leaf stoichiometry information is critical developing an understanding of nutrient cycling processes, in developing biogeochemical models, and in predicting plant responses to global climate change ( Zhao et al, 2014 , 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Leaf Stoichiometry of Potentilla fruticosa Across Elevations in China’s Qilian Mountains

et al. 2022

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As an individual plant species can develop its own leaf stoichiometry to adapt to environmental changes, this stoichiometry can provide critical information about a plant species’ growth and its potential management in the ecosystem housing it. However, leaf stoichiometry is largely undocumented in regions with large environmental changes arising from differences in elevation. The leaf stoichiometry of Potentilla fruticosa L., a major alpine shrub playing an important role in supporting ecosystem functions and services in China’s Qilian Mountains (Northeast Qinghai–Tibetan Plateau), was investigated at different elevations (2,400, 2,600, 2,800, 3,000, 3,200, 3,500, and 3,800 m). At each elevation, leaf elemental (C, N, and P) concentrations were measured in P. fruticosa leaves sampled from three plots (10 × 10 m), and edaphic properties were assessed in nine quadrats (1 × 1 m, three quadrats per plot). Temperature and precipitation were calculated using an empirical formula. Maximum and minimum leaf carbon (C) concentrations ([C]leaf) of 524 ± 5.88 and 403 ± 3.01 g kg–1 were measured at 2,600 and 3,500 m, respectively. Leaf nitrogen (N) concentration ([N]leaf) showed a generally increasing trend with elevation and peaked at 3,500 m (27.33 ± 0.26 g kg–1). Leaf phosphorus (P) concentration ([P]leaf) varied slightly from 2,400 to 3,200 m and then dropped to a minimum (0.60 ± 0.10 g kg–1) at 3800 m. The [C]leaf:[N]leaf, [C]leaf:[P]leaf, and [N]leaf:[P]leaf varied little from 2,400 to 3,000 m but fluctuated somewhat at higher elevations. The main factors affecting P. fruticosa leaf stoichiometry were soil organic C, pH, and soil total P, and the main limiting element for the growth of P. fruticosa in the study area was P. In conclusion, changes in elevation affected leaf stoichiometry of P. fruticosa mainly due to altered soil properties, and addressing phosphorus limitation, especially at higher elevations mainly due to losses caused by high precipitation and sparse vegetation, is a key measure to promote P. fruticosa growth in this region.

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Section: Introductionmentioning

confidence: 99%

Leaf Stoichiometry of Potentilla fruticosa Across Elevations in China’s Qilian Mountains

et al. 2022

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“…Ecological stoichiometry focuses on the balance of multiple elements in ecological interactions and processes, such as energy flow and nutrient cycling, and has become an important topic of research in recent years in ecology and biology (Moe et al, 2005 ; Sistla and Schimel, 2012 ; Yang et al, 2019 ; Zhu et al, 2020 ). It is an important tool to reveal organisms' responses to external disturbances and nutrient supply balance mechanisms in ecosystems (Zeng et al, 2016 ), mainly by analyzing changes in carbon (C), nitrogen (N), and phosphorus (P) (Cao et al, 2020 ), which are well-known as basic elements constituting plants and are closely linked to plant photosynthesis, respiration, and various ecosystem functions (Elser et al, 2010 ; Marschner and Marschner, 2012 ; Wang et al, 2015 ; Yan et al, 2016 ; Croft et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

“…Leaves are the most active and primary photosynthetic plant organ (Elser et al, 2010 ; Yang et al, 2019 ), their size and structure exhibit a tradeoff between the support cost and photosynthetic returns during plant adaptation to environmental changes (Shi et al, 2020 , 2022 ; Guo et al, 2021 ; Li et al, 2022a , b ), and leaf stoichiometry can reflect the tradeoff formed in this evolution from the angle of leaf chemical elements and its spatio-temporal variations (Baxter and Dilkes, 2012 ; Cao et al, 2020 ; Zhu et al, 2020 ). Leaf C/N and C/P were widely accepted as effective indicators of plants' N and P use efficiency and growth rate, and their lower values indicated lower nutrient utilization efficiency and higher plant growth (Weidner et al, 2015 ; Sun et al, 2017 ; Cao et al, 2020 ; Zhang et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Response of leaf stoichiometry of Potentilla anserina to elevation in China's Qilian Mountains

Zhang

Qi²,

Cao³

et al. 2022

Front. Plant Sci.

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Plants adapt to changes in elevation by regulating their leaf ecological stoichiometry. Potentilla anserina L. that grows rapidly under poor or even bare soil conditions has become an important ground cover plant for ecological restoration. However, its leaf ecological stoichiometry has been given little attention, resulting in an insufficient understanding of its environmental adaptability and growth strategies. The objective of this study was to compare the leaf stoichiometry of P. anserina at different elevations (2,400, 2,600, 2,800, 3,000, 3,200, 3,500, and 3,800 m) in the middle eastern part of Qilian Mountains. With an increase in elevation, leaf carbon concentration [(C)leaf] significantly decreased, with the maximum value of 446.04 g·kg−1 (2,400 m) and the minimum value of 396.78 g·kg−1 (3,500 m). Leaf nitrogen concentration [(N)leaf] also increased with an increase in elevation, and its maximum and minimum values were 37.57 g·kg−1 (3,500 m) and 23.71 g·kg−1 (2,800 m), respectively. Leaf phosphorus concentration [(P)leaf] was the highest (2.79 g·kg−1) at 2,400 m and the lowest (0.91 g·kg−1) at 2,800 m. The [C]leaf/[N]leaf decreased with an increase in elevation, while [N]leaf/[P]leaf showed an opposite trend. The mean annual temperature, mean annual precipitation, soil pH, organic carbon, nitrogen, and phosphorus at different elevations mainly affected [C]leaf, [N]leaf, and [P]leaf. The growth of P. anserina in the study area was mainly limited by P, and this limitation was stronger with increased elevation. Progressively reducing P loss at high elevation is of great significance to the survival of P. anserina in this specific region.

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“…Our study revealed significant differences associated with species traits with respect to the fine root dynamics (live fine root biomass, fine root necromass, productivity, turnover rate and decomposition rate) as well as soil organic carbon content. In this study, SA had lower fine root mass and productivity due to the intensive demand for light and fast-growing characteristics of S. apetala (Chen et al, 2012;Zhu et al, 2020), with significantly stronger self-thinning effect compared with the K. obovata plantation. Combining with its higher fine root turnover and decomposition rates, fine roots of S. apetala may have a lower contribution to soil organic carbon accumulation than those of K. obovata, as the balance between productivity and decomposition of fine roots in the anoxic environment crucially determines the belowground carbon storage in mangrove soils.…”

Section: Implications Of Species Traits For Carbon-based Mangrove Aff...mentioning

confidence: 74%

Monoculture or Mixed Culture? Relevance of Fine Root Dynamics to Carbon Sequestration Oriented Mangrove Afforestation and Restoration

He¹,

Sun

Yu³

et al. 2021

Front. Mar. Sci.

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Fine root dynamics have the potential to contribute to ecosystem biogeochemical cycling, especially for carbon. This is particularly true in mangroves which are the most productive and carbon-rich ecosystems of the world. However, few studies comprehensively evaluated the contribution of mangrove fine root dynamics to soil organic carbon accumulation. In southern China, while the introduced fast-growing Sonneratia apetala and native shrubby Kandelia obovata have been widely used in mangrove reforestation/afforestation programs since the mid-1980s, their implications and ecosystem services are still unclear. Here we show distinct differences in fine root dynamic among 12-year-old S. apetala, K. obovata monocultures, and their mixed stand using root coring, ingrowth core, and intact-core methods. Soil organic carbon storage was examined by soil coring method. One-year observation showed significant differences among the three mangrove plantations in fine root biomass, necromass, turnover rate, and decomposition decay rate constant. Soil organic carbon stock was 15.8 ± 0.8, 7.8 ± 0.5, and 11.9 ± 1.6 Mg C ha–1 for K. obovata, S. apetala monocultures and their mixed stand, respectively. Live fine root biomass, fine root necromass, annual fine root production and fine root mass decay rate constant are significantly correlated to soil organic carbon content across plantations. We suggest that mangrove fine root dynamics were mainly affected by soil nutrient conditions and species composition. Mixed stands may not have higher soil organic carbon storage than monocultures. The functional trait of different mangrove species is responsible to determine the carbon storage function of mixed stands. Fine roots play an important role in carbon storage, and fine root dynamics have a significant effect on carbon sequestration in mangrove ecosystems. The shrubby native K. obovata had a higher potential for belowground carbon sequestration and storage than the tall introduced S. apetala.

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Light and competition alter leaf stoichiometry of introduced species and native mangrove species

Cited by 36 publications

References 91 publications

Leaf Stoichiometry of Potentilla fruticosa Across Elevations in China’s Qilian Mountains

Leaf Stoichiometry of Potentilla fruticosa Across Elevations in China’s Qilian Mountains

Response of leaf stoichiometry of Potentilla anserina to elevation in China's Qilian Mountains

Monoculture or Mixed Culture? Relevance of Fine Root Dynamics to Carbon Sequestration Oriented Mangrove Afforestation and Restoration

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