Stoichiometric flexibility and soil bacterial communities respond to nitrogen fertilization and neighbor competition at the early stage of primary succession

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Song , M , Yu , L , Fu , S , Korpelainen , H & Li , C 2020 , ' Stoichiometric flexibility and soil bacterial communities respond to nitrogen fertilization and neighbor competition at the early stage of primary succession ' , Biology and Fertility of Soils , vol. 56 , no. 8 , pp. 1121-1135 . https://doi.org/10.1007/s00374-020-01495-4

Title: Stoichiometric flexibility and soil bacterial communities respond to nitrogen fertilization and neighbor competition at the early stage of primary succession
Author: Song, Mengya; Yu, Lei; Fu, Shenglei; Korpelainen, Helena; Li, Chunyang
Contributor organization: Department of Agricultural Sciences
Viikki Plant Science Centre (ViPS)
Population Genetics and Biodiversity Group
Plant Production Sciences
Date: 2020-11
Language: eng
Number of pages: 15
Belongs to series: Biology and Fertility of Soils
ISSN: 0178-2762
DOI: https://doi.org/10.1007/s00374-020-01495-4
URI: http://hdl.handle.net/10138/326554
Abstract: At the early stage of primary succession, there are deficient nutrient resources as well as competition stress among neighboring plants. Our aims were to elucidate the flexibility of tree seedlings' stoichiometric relationships and their effects on soil microbial communities, and to determine the driving forces of species turnover during primary succession through the evaluation of carbon (C) : nitrogen (N) : phosphorus (P) stoichiometric relationships. We conducted an experiment testing N addition effect on two species from the early stage of primary succession, under intra- and interspecific competition conditions. Our results showed that higher values of delta N-15-NO(3)(-)and delta C-13 were observed inPopulus purdomiiindividuals than inSalix rehderianaafter N application, which indicated a more efficient N uptake and water-use efficiency inP. purdomiiplants. Furthermore, under N addition, the intraspecific competition ofP. purdomiipresented a higher urease activity, microbial biomass C (MBC), microbial N:P ratio (MBN:MBP), and phylogenetic diversity compared to the intraspecific competition ofS. rehderiana. The results showed thatP. purdomiiseedlings influenced soil properties in a way that led to a positive feedback on their performance with an increasing N availability. In contrast,S. rehderianaseedlings influenced soil properties in a way that caused a negative feedback on their performance with increasing N. Such events can promote species turnover fromSalixtoPopulusduring succession. Additionally, DNA sequencing of soil bacterial communities showed differences in the composition of microbial communities in response to N fertilization and different competition patterns. Altogether, our results showed that plant, soil, and microbial community responses to N fertilization in a subalpine glacier forefield differed among tree species and competition patterns. This study brings new insight into mechanisms that drive species replacement and biogeochemical cycling during primary succession.
Subject: N addition
Stoichiometric flexibility
Soil bacterial community
Plant-plant competition
Primary succession
MICROBIAL BIOMASS PHOSPHORUS
PLANT-PLANT INTERACTIONS
HAILUOGOU GLACIER
GONGGA MOUNTAIN
NUTRIENT LIMITATION
EXTRACTION METHOD
LITTER CHEMISTRY
ENZYME-ACTIVITY
DRIVING FORCES
MINERALIZATION
11831 Plant biology
11832 Microbiology and virology
Peer reviewed: Yes
Usage restriction: openAccess
Self-archived version: acceptedVersion


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