Climatic Control on Plant and Soil δ13C along an Altitudinal Transect of Lushan Mountain in Subtropical China: Characteristics and Interpretation of Soil Carbon Dynamics

Du, Baoming; Liu, Chunjiang; Kang, Hongzhang; Zhu, Pengfei; Yin, Shan; Shen, Guangrong; Hou, Jingli; Ilvesniemi, Hannu

doi:10.1371/journal.pone.0086440

Cited by 20 publications

(13 citation statements)

References 48 publications

(84 reference statements)

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“…Foliage δ 13 C values vary across changes of precipitation, with the general pattern being that plants in precipitation reduction tend to have more enriched δ 13 C in their foliage than those in moist environments (Werth and Kuzyakov 2010). Many previous studies reported that plants adapted to precipitation reduction environments are expected to have higher δ 13 C values (Swap et al 2004;Du et al 2014;Blessing et al 2016), which is consistent with our study. This result is mainly due to plant 13 C discrimination.…”

Section: Effects Of Precipitation Reduction On Ecosystem C and N Cyclingsupporting

confidence: 90%

Variations in the natural 13C and 15N abundance of plants and soils under long-term N addition and precipitation reduction: interpretation of C and N dynamics

et al. 2020

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Background:The nitrogen isotope natural abundance (δ 15 N) provides integrated information on ecosystem N dynamics, and carbon isotope natural abundance (δ 13 C) has been used to infer how water-using processes of plants change in terrestrial ecosystems. However, how δ 13 C and δ 15 N abundances in plant life and soils respond to N addition and water availability change is still unclear. Thus, δ 13 C and δ 15 N abundances in plant life and soils were used to investigate the effects of long-time (10 years) N addition (+ 50 kg N•ha − 1 •yr − 1 ) and precipitation reduction (− 30% of throughfall) in forest C and N cycling traits in a temperate forest in northern China. Results: We analyzed the δ 13 C and δ 15 N values of dominant plant foliage, litterfall, fungal sporophores, roots, and soils in the study. The results showed that δ 15 N values of foliage, litterfall, and surface soil layer's (0-10 cm) total N were significantly increased by N addition, while δ 15 N values of fine roots and coarse roots were considerably decreased. Nitrogen addition also significantly increased the δ 13 C value of fine roots and total N concentration of the surface soil layer compared with the control. The C concentration, δ 13 C, and δ 15 N values of foliage and δ 15 N values of fine roots were significantly increased by precipitation reduction, while N concentration of foliage and litterfall significantly decreased. The combined effects of N addition and precipitation reduction significantly increased the δ 13 C and δ 15 N values of foliage as well as the δ 15 N values of fine roots and δ 13 C values of litterfall. Furthermore, foliar δ 15 N values were significantly correlated with foliage δ 13 C values, surface soil δ 15 N values, surface soil C concentration, and N concentrations. Nitrogen concentrations and δ 13 C values of foliage were significantly correlated with δ 15 N values and N concentrations of fine roots. Conclusions: This indicates that plants increasingly take up the heavier 15 N under N addition and the heavier 13 C and 15 N under precipitation reduction, suggesting that N addition and precipitation reduction may lead to more open forest ecosystem C and N cycling and affect plant nutrient acquisition strategies.

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Section: Effects Of Precipitation Reduction On Ecosystem C and N Cyclingsupporting

confidence: 90%

Variations in the natural 13C and 15N abundance of plants and soils under long-term N addition and precipitation reduction: interpretation of C and N dynamics

et al. 2020

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“…Over time, dynamics of soil δ 13 C are therefore largely controlled by C inputs from vegetation and subsequent microbial decomposition [13,18,61]. However, we found that climate and edaphic properties exerted greater control on soil 13 C in the investigated temperate grasslands (Table 2), which is consistent with previous studies demonstrating the importance of climate on soil δ 13 C [13,62]. Additionally, a previous study also showed that the spatial variation of soil δ 13 C was related to soil texture in a subtropical lowland woodland [25].…”

Section: Discussionsupporting

confidence: 90%

Climatic, Edaphic and Biotic Controls over Soil δ13C and δ15N in Temperate Grasslands

Zhao

Wang

et al. 2020

Forests

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Soils δ13C and δ15N are now regarded as useful indicators of nitrogen (N) status and dynamics of soil organic carbon (SOC). Numerous studies have explored the effects of various factors on soils δ13C and δ15N in terrestrial ecosystems on different scales, but it remains unclear how co-varying climatic, edaphic and biotic factors independently contribute to the variation in soil δ13C and δ15N in temperate grasslands on a large scale. To answer the above question, a large-scale soil collection was carried out along a vegetation transect across the temperate grasslands of Inner Mongolia. We found that mean annual precipitation (MAP) and mean annual temperature (MAT) do not correlate with soil δ15N along the transect, while soil δ13C linearly decreased with MAP and MAT. Soil δ15N logarithmically increased with concentrations of SOC, total N and total P. By comparison, soil δ13C linearly decreased with SOC, total N and total P. Soil δ15N logarithmically increased with microbial biomass C and microbial biomass N, while soil δ13C linearly decreased with microbial biomass C and microbial biomass N. Plant belowground biomass linearly increased with soil δ15N but decreased with soil δ13C. Soil δ15N decreased with soil δ13C along the transect. Multiple linear regressions showed that biotic and edaphic factors such as microbial biomass C and total N exert more effect on soil δ15N, whereas climatic and edaphic factors such as MAT and total P have more impact on soil δ13C. These findings show that soil C and N cycles in temperate grasslands are, to some extent, decoupled and dominantly controlled by different factors. Further investigations should focus on those ecological processes leading to decoupling of C and N cycles in temperate grassland soils.

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“…having similar altitudes and precipitation regimes) from the tropics and subtropics have lower δ 13 C values than Fagaceae and other evergreen angiosperms (Read and Farquhar, 1991;Wei et al, 2010;Du et al, 2014). The larger carbon isotope fractionation (by approximately 2‰) has been attributed to the relatively low water use efficiency requirements of Fagaceae in cool, moist submontane forest ecosystems in China (Du et al, 2014).…”

Section: Regional Vegetation Changes In Central Sulawesi During the Lgmmentioning

confidence: 97%

Compound-specific carbon isotope records of vegetation and hydrologic change in central Sulawesi, Indonesia, since 53,000 yr BP

Wicaksono

Russell

Bijaksana

2015

Palaeogeography, Palaeoclimatology, Palaeoecology

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Lake Matano (2°29.1′S 121°20′E) in central Sulawesi, the deepest and one of the largest lakes in Indonesia, provides an excellent opportunity to reconstruct long-term hydrological and vegetation changes at the heart of the Maritime Continent within the tropical Western Pacific Warm Pool. We measured the carbon isotopic composition of terrestrial leaf waxes (δ 13 C wax ) in new sediment cores from Lake Matano to understand regional variations in vegetation and their interactions with local and high latitude climate forcings during the past 53 kyr. Variations in δ 13 C wax record the expansion and contraction of C 3 versus C 4 vegetation as well as changes in plants' carbon and water use efficiency and, by inference, regional hydroclimate. During Marine Isotope Stages 1 and 3, more negative δ 13 C wax values indicate that closed-canopy C 3 rainforests predominated in Sulawesi, reflecting a wetter, less seasonal climate. In contrast, more positive δ 13 C wax values record a terrestrial ecosystem with more abundant open canopy vegetation and possible expansion of C 4 grasses between 29 and 14 ka BP, indicating that during Marine Isotope Stage 2, including the Last Glacial Maximum, the climate was more arid, likely with increased precipitation seasonality, in central Sulawesi. Comparison of our record with other paleovegetation and paleohydrological records from Sulawesi and nearby islands suggests coherent long-term hydrological changes in central Indonesia that appear to be sensitive to high latitude climate across glacial-interglacial boundaries. However, variations in the amplitude of the response of vegetation to these glacial-interglacial forcings highlight the importance of regional topographic control on climate and vegetation and suggest an important role for higher elevations in maintaining rainforest refugia during regionally arid time intervals when C 4 savannas and grasslands expanded at lower elevations.

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Climatic Control on Plant and Soil δ13C along an Altitudinal Transect of Lushan Mountain in Subtropical China: Characteristics and Interpretation of Soil Carbon Dynamics

Cited by 20 publications

References 48 publications

Variations in the natural 13C and 15N abundance of plants and soils under long-term N addition and precipitation reduction: interpretation of C and N dynamics

Variations in the natural 13C and 15N abundance of plants and soils under long-term N addition and precipitation reduction: interpretation of C and N dynamics

Climatic, Edaphic and Biotic Controls over Soil δ13C and δ15N in Temperate Grasslands

Compound-specific carbon isotope records of vegetation and hydrologic change in central Sulawesi, Indonesia, since 53,000 yr BP

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