气候变化领域集成服务门户(CCPortal): Chemical fertility of forest ecosystems. Part 2: Towards redefining the concept by untangling the role of the different components of biogeochemical cycling

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DOI	10.1016/j.foreco.2019.117844
	Chemical fertility of forest ecosystems. Part 2: Towards redefining the concept by untangling the role of the different components of biogeochemical cycling
	Legout A.; Hansson K.; van der Heijden G.; Laclau J.-P.; Mareschal L.; Nys C.; Nicolas M.; Saint-André L.; Ranger J.
发表日期	2020
ISSN	0378-1127
卷号	461
英文摘要	Many forest ecosystems are developed on acidic and nutrient-poor soils and it is not yet clearly understood how forests sustain their growth with low nutrient resources. In forestry, the soil chemical fertility is commonly defined, following concepts inherited from agronomy, as the pool of plant-available nutrients in the soil at a given time compared to the nutritional requirement of the tree species. In this two-part study, Part 1 (Hansson et al., 2020) showed, through the compiled dataset of 49 forest ecosystems in France, Brazil and Republic of Congo, the limits of this definition of soil chemical fertility in forest ecosystem contexts. In this study (Part 2), we investigated the nutrient pools and fluxes between the different ecosystem compartments at 11 of the 49 sites in order to better characterize the role of the biogeochemical cycling of nutrients in the chemical fertility of forest ecosystems, and in particular the roles of the biological and geochemical components of biogeochemical cycling. The analysis of our dataset shows different types of biogeochemical functioning. When the geochemical component (inputs through mineral weathering and/or atmospheric inputs, capillary rise) is predominant, sufficient nutrients are provided to the plant-soil system to ensure tree nutrition and growth. Conversely, when the geochemical component of the cycle brings too few nutrients to the plant-soil system, the biological component (litterfall, plant internal cycling) becomes predominant in tree nutrition and growth. In the latter case, forest production may be high even when pools of nutrients in the soil reservoir are low because small but active nutrient fluxes may continuously replenish the soil reservoir or may directly ensure tree nutrition by bypassing the soil reservoir. This study highlights the necessity to include biogeochemical cycling and recycling fluxes in the definition and diagnosis methods of soil chemical fertility in forest ecosystems. We show that the chemical fertility is not only supported by the soil in forest ecosystem but by the sum of all the ecosystem's compartments and fluxes between these pools. © 2020 Elsevier B.V.
英文关键词	Biological cycling; Chemical fertility; Geochemical cycling; Nutritional functioning
语种	英语
scopus关键词	Biogeochemistry; Forestry; Lakes; Nutrients; Nutrition; Plants (botany); Soils; Biogeochemical cycling; Biogeochemical functioning; Biological components; Biological cycling; Geochemical components; Geochemical cycling; Nutritional functioning; Plant-available nutrients; Ecosystems; acid soil; biogeochemical cycle; biological analysis; chemical analysis; flux measurement; forest ecosystem; forest soil; nutrient availability; nutrient cycling; nutritional requirement; soil fertility; soil-vegetation interaction; Chemicals; Ecosystems; Fertility; Forestry; Lakes; Nutrients; Nutrition; Soil; Brazil; Congo; France
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155440
作者单位	INRA, BEF, Nancy, F-54280, France; CIRAD, UMR Eco&Sols, Montpellier, F-34060, France; Eco&Sols, CIRAD, INRA, IRD, Montpellier, SupAgro, University of Montpellier, Montpellier, France; ONF, Département RDI, Fontainebleau, F-77300, France
推荐引用方式 GB/T 7714	Legout A.,Hansson K.,van der Heijden G.,et al. Chemical fertility of forest ecosystems. Part 2: Towards redefining the concept by untangling the role of the different components of biogeochemical cycling[J],2020,461.
APA	Legout A..,Hansson K..,van der Heijden G..,Laclau J.-P..,Mareschal L..,...&Ranger J..(2020).Chemical fertility of forest ecosystems. Part 2: Towards redefining the concept by untangling the role of the different components of biogeochemical cycling.Forest Ecology and Management,461.
MLA	Legout A.,et al."Chemical fertility of forest ecosystems. Part 2: Towards redefining the concept by untangling the role of the different components of biogeochemical cycling".Forest Ecology and Management 461(2020).