Ranking thirteen tree species based on their impact on soil physiochemical properties, soil fertility, and carbon sequestration in Northeastern China

Wang, Wenjie; Lu, Juan; Du, Hu; Wei, Chaojun; Wang, Huimei; Fu, Yujie; He, Xingyuan

doi:10.1016/j.foreco.2017.08.047

Cited by 48 publications

(25 citation statements)

References 42 publications

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“…Using this method, higher scores indicate higher microclimate regulation functions. Data standardization and the comprehensive scoring method were adopted from Lu et al (2016) and Wang et al (2017a).…”

Section: Discussionmentioning

confidence: 99%

Microclimate regulating functions of urban forests in Changchun City (north-east China) and their associations with different factors

Wang¹,

Wang²,

Lu³

et al. 2018

iForest

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Microclimate regulating functions of urban trees and their associations with environmental factors and tree-growth characteristics are important for management and ecological evaluations. In this study, a total of 637 trees distributed in the Changchun urban region (ca. 400 km 2 , northeastern China) were sampled in four different types of urban forests (AF: affiliated forests; RF: roadside forests; LF: landscape and relaxation forests; EF: ecological welfare forests). Tree growth-related parameters and environmental factors (inside and outside the forest) were simultaneously measured, and location-dependent differences in shading, cooling and humidifying effects were assessed, along with their associations with the measured variables. We found that urban forests in Changchun reduced the incident sunlight by 74-86% and increased air relative humidity by 3-7%, on average. Air, soil, and upper-canopy temperatures were decreased approximately by 3 °C, <1 °C and 1 °C, respectively, showing a 3-dimensional cooling effect of urban forests on both air and soil. Shading, cooling and humidifying effects significantly differed among the four forest types, with AF stands showing the highest comprehensive scores for all the microclimate regulation functions. Regression analyses and redundancy analysis revealed that urban forests had much stronger effect in terms of microclimate regulation at sunny days with high temperature, and low air humidity. In general, stands with larger trees showed the higher regulating functions, regardless of the stand structure and composition. The results of this study may help urban forest management and planning aimed at maximizing their ecological services.

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Section: Discussionmentioning

confidence: 99%

Microclimate regulating functions of urban forests in Changchun City (north-east China) and their associations with different factors

Wang¹,

Wang²,

Lu³

et al. 2018

iForest

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“…Here, three commercially important tree species, larch ( Larix kaempferi ), ash ( Fraxinus mandshurica ) and Chinese fir ( Cunninghamia lanceolata ) from different families were planted in a C 4 soil (which was under C 4 ‐vegetation for 23 yr). These species differ greatly in life form, growth rate, mycorrhizal association and root traits (Supporting Information Tables S1, S2), and have different effects on soil C and N cycling (Wang et al ., , ). We calculated the RPE on soil C and N mineralization using a 13 C natural abundance approach (Cheng et al ., ) and a 15 N pool dilution method (Wu et al ., ), respectively.…”

Section: Introductionmentioning

confidence: 95%

Rhizosphere priming effects on soil carbon and nitrogen dynamics among tree species with and without intraspecific competition

et al. 2018

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Rhizosphere priming effects (RPEs) play a central role in modifying soil organic matter mineralization. However, effects of tree species and intraspecific competition on RPEs are poorly understood. We investigated RPEs of three tree species (larch, ash and Chinese fir) and the impact of intraspecific competition of these species on the RPE by growing them at two planting densities for 140 d. We determined the RPE on soil organic carbon (C) decomposition, gross and net nitrogen (N) mineralization and net plant N acquisition. Differences in the RPE among species were associated with differences in plant biomass. Gross N mineralization and net plant N acquisition increased, but net N mineralization decreased, as the RPE on soil organic C decomposition increased. Intraspecific competition reduced the RPE on soil organic C decomposition, gross and net N mineralization, and net plant N acquisition, especially for ash and Chinese fir. Microbial N mining may explain the overall positive RPEs across species, whereas intensified plant-microbe competition for N may have reduced the RPE with intraspecific competition. Overall, the species-specific effects of tree species play an important role in modulating the magnitude and mechanisms of RPEs and the intraspecific competition on soil C and N dynamics.

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“…Specific designs, such as demolition of illegal structures for tree planting, replanting trees in vacant lots that surround by buildings ( Bajsanski, Stojakovic & Jovanovic, 2016 ; Zhao, 2017 ; Zhao, Wentz & Murray, 2017 ), and implementation of vertical greening on roofs, walls, and bridges, may increase the connectivity of urban forests and have a positive influence on the fragmented landscape ( Gao & Yu, 2014 ). Previous studies have highlighted that urban greening practices should consider the importance of biodiversity conservation ( Xiao et al, 2016a ), removal of pollutants ( Escobedo & Nowak, 2009 ; Mu, Sun & Zhu, 2004 ), urban microclimate regulations ( Wang et al, 2018 ), urban heat island mitigation ( Zhang et al, 2017a ), and urban soil improvement ( Cui & Mu, 2016 ; Wang et al, 2017 ; Zhou et al, 2017 ). Our findings strongly suggest that urban forest carbon sequestration in both aboveground biomass and belowground soil carbon should be considered for co-improvement of multiple ecological services.…”

Section: Discussionmentioning

confidence: 99%

“…Harbin, a typical provincial capital city in Northeastern China, has been checked for urbanization effects on urban tree species diversity and possible associations with bird species alternations ( Xiao et al, 2016a ), tree species configuration problems in urban afforestation ( Xiao et al, 2016b ), and best tree species for improving urban forest soils ( Lu et al, 2016 ; Wang et al, 2017 ) and soil glomalin and mycorrhizal features ( Zhong et al, 2016 ; Cui & Mu, 2016 ). However, whole carbon storage at city scale, especially soil organic carbon (SOC), and the relationships with landscape pattern characteristics are still unknown ( Ying, Li & Fan, 2009 ; Lv et al, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Association of urban forest landscape characteristics with biomass and soil carbon stocks in Harbin City, Northeastern China

Wang

et al. 2018

PeerJ

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BackgroundUrban forests help in mitigating carbon emissions; however, their associations with landscape patterns are unclear. Understanding the associations would help us to evaluate urban forest ecological services and favor urban forest management via landscape regulations. We used Harbin, capital city of the northernmost province in China, as an example and hypothesized that the urban forests had different landscape metrics among different forest types, administrative districts, and urban–rural gradients, and these differences were closely associated with forest carbon sequestration in the biomass and soils.MethodsWe extracted the urban forest tree coverage area on the basis of 2 GF-1 remote sensing images and object-oriented based classification method. The analysis of forest landscape patterns and estimation of carbon storage were based on tree coverage data and 199 plots. We also examined the relationships between forest landscape metrics and carbon storage on the basis of forest types, administrative districts, ring roads, and history of urban settlements by using statistical methods.ResultsThe small patches covering an area of less than 0.5 ha accounted for 72.6% of all patches (average patch size, 0.31 ha). The mean patch size (AREA_MN) and largest patch index (LPI) were the highest in the landscape and relaxation forest and Songbei District. The landscape shape index (LSI) and number of patches linearly decreased along rural-urban gradients (p < 0.05). The tree biomass carbon storage varied from less than 10 thousand tons in the urban center (first ring road region and 100-year regions) to more than 100 thousand tons in the rural regions (fourth ring road and newly urbanized regions). In the same urban–rural gradients, soil carbon storage varied from less than five thousand tons in the urban centers to 73–103 thousand tons in the rural regions. The association analysis indicated that the total forest area was the key factor that regulates total carbon storage in trees and soils. However, in the case of carbon density (ton ha−1), AREA_MN was strongly associated with tree biomass carbon, and soil carbon density was negatively related to LSI (p < 0.01) and AREA_MN (p < 0.05), but positively related to LPI (p < 0.05).DiscussionThe urban forests were more fragmented in Harbin than in other provincial cities in Northeastern China, as shown by the smaller patch size, more complex patch shape, and larger patch density. The decrease in LSI along the rural-urban gradients may contribute to the forest carbon sequestrations in downtown regions, particularly underground soil carbon accumulation, and the increasing patch size may benefit tree carbon sequestration. Our findings help us to understand how forest landscape metrics are associated with carbon storage function. These findings related to urban forest design may maximize forest carbon sequestration services and facilitate in precisely estimating the forest carbon sink.

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Ranking thirteen tree species based on their impact on soil physiochemical properties, soil fertility, and carbon sequestration in Northeastern China

Cited by 48 publications

References 42 publications

Microclimate regulating functions of urban forests in Changchun City (north-east China) and their associations with different factors

Microclimate regulating functions of urban forests in Changchun City (north-east China) and their associations with different factors

Rhizosphere priming effects on soil carbon and nitrogen dynamics among tree species with and without intraspecific competition

Association of urban forest landscape characteristics with biomass and soil carbon stocks in Harbin City, Northeastern China

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