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 |
Externí odkaz: | |
Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |