关键词:
活化石,
桫椤,
碳固存能力
Abstract:
Aims A living fossil is the nearest extant equivalent of an extinct species. Our objective is to utilize the biomass and productivity of living-fossil ecosystems to estimate the evolutionary trend in carbon sequestration capacity of terrestrial ecosystems.
Methods We investigated biomass and productivity of a living-fossil tree fern (Alsophila spinulosa) ecosystem in Sichuan Province of China using standard tree sampling methods.
Important findings The biomass and productivity of this living-fossil ecosystem ((36.151 ± 8.159) Mg C·hm -2 and (2.535 ± 0.174) Mg C·hm -2·a-1, respectively) were smaller than that in current gymnosperm- or angiosperm-dominated ecosystems. This provides insight into the evolutionary trend in paleo-ecosystem carbon sequestration capacity and, hence, into understanding global carbon balance.
Key words:
living fossil,
Alsophila spinulosa,
carbon sequestration capacity