Effect of warming and degradation on phenophases of Kobresia pygmaea and Potentilla multifida on the Tibetan Plateau

NWIPB OpenIR

	Effect of warming and degradation on phenophases of Kobresia pygmaea and Potentilla multifida on the Tibetan Plateau
	Zhang, Lirong; Lv, Wangwang; Cui, Shujuan; Jiang, Lili; Li, Bowen; Liu, Peipei; Wang, Qi; Zhou, Yang; Hong, Huan; Wang, A.; Luo, Caiyun; Zhang, Zhenhua; Dorji, Tsechoe; Wang, Shiping
	2020
发表期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
卷号	300
摘要	Many studies have focused on the responses of phenophases to warming in natural, non-degraded grasslands. However, degraded grasslands widely distribute in the world due to climate change and overgrazing. So far, a comprehensive understanding of how plant phenology responds to warming, degradation and their interactions remains elusive. Here, the relative effects of warming and degradation on the phenological sequences of two dominant plant species were tested using a two factorial experiment of warming and moderate degradation (i.e., four treatments: NWND, WND, NWD and WD) during three successive years. We found that WND significantly delayed the onsets of early phenophases (i.e., leaf-out, booting-seL flowering and fruiting-set) and shortened the total activity period (TAP) only for the early spring flowering Kobresia pygmaea compared with NWND. NWD generally did not significantly affect the timing or duration of all phenophases for the two plant species depending on year relative to NWND. Interaction between warming and moderate degradation significantly delayed leaf-out and shortened total activity period of the two plant species. There were negative correlations between plant species richness and onset of vegetation after fruiting-set for K. pygmaea and the duration of fruiting-set for Potentilla multifida (a dominant mid-summer flowering species in degraded plots), but there were positive correlations between plant species richness and leafing duration for P. multifida. Positive correlations were found between first leaf-out and NO3--N in soils for both species but negative correlations were found between first leaf-out and NH4--N in soils for P. multifida. There were positive and negative correlations between TAP of P. multifida and NH4--N and NO3--N in soils, respectively. Therefore, our results suggest that moderate degradation could weaken the negative effects of warming on reproductive phenophases of K. pygmaea, and that we should take into account grassland degradation and its associated changes in plant species richness and soil inorganic nitrogen when we predict the response of plant phenology to future warming.
关键词	Warming Degradation Plant phenological sequence Onset and duration Kobresia pygmaea and Potentilla multifida Species diversity Soil nutrient Alpine grassland Tibetan Plateau
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/60248
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Zhang, Lirong,Lv, Wangwang,Cui, Shujuan,et al. Effect of warming and degradation on phenophases of Kobresia pygmaea and Potentilla multifida on the Tibetan Plateau[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2020,300.
APA	Zhang, Lirong.,Lv, Wangwang.,Cui, Shujuan.,Jiang, Lili.,Li, Bowen.,...&Wang, Shiping.(2020).Effect of warming and degradation on phenophases of Kobresia pygmaea and Potentilla multifida on the Tibetan Plateau.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,300.
MLA	Zhang, Lirong,et al."Effect of warming and degradation on phenophases of Kobresia pygmaea and Potentilla multifida on the Tibetan Plateau".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 300(2020).