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

Autor: Shenglei Fu, Chunyang Li, Helena Korpelainen, Lei Yu, Mengya Song
Přispěvatelé: Department of Agricultural Sciences, Viikki Plant Science Centre (ViPS), Population Genetics and Biodiversity Group, Plant Production Sciences
Rok vydání: 2020
Předmět:
Primary succession
Biogeochemical cycle
media_common.quotation_subject
Soil Science
Ecological succession
Biology
Microbiology
Intraspecific competition
Competition (biology)
03 medical and health sciences
HAILUOGOU GLACIER
Nutrient
NUTRIENT LIMITATION
Soil bacterial community
PLANT-PLANT INTERACTIONS
Stoichiometric flexibility
N addition
ENZYME-ACTIVITY
MINERALIZATION
030304 developmental biology
media_common
11832 Microbiology and virology
2. Zero hunger
0303 health sciences
DRIVING FORCES
Plant-plant competition
04 agricultural and veterinary sciences
Interspecific competition
15. Life on land
11831 Plant biology
EXTRACTION METHOD
LITTER CHEMISTRY
Agronomy
Microbial population biology
040103 agronomy & agriculture
0401 agriculture
forestry
and fisheries
MICROBIAL BIOMASS PHOSPHORUS
GONGGA MOUNTAIN
Agronomy and Crop Science
Zdroj: Biology and Fertility of Soils. 56:1121-1135
ISSN: 1432-0789
0178-2762
Popis: 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.
Databáze: OpenAIRE
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