Knowledge Management System of Northwest Institute of Plateau Biology, CAS
Three Tibetan grassland plant species tend to partition niches with limited plasticity in nitrogen use | |
Zhang, Li![]() ![]() ![]() | |
2019 | |
发表期刊 | PLANT AND SOIL
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卷号 | 441 |
摘要 | Aims Niche complementarity theory explains how species coexist by using different resources. Two pathways to partition resource have been demonstrated: classical niche differentiation and plasticity in resource use. We aimed to determine N-uptake patterns in three Tibetan Plateau grassland species, and to examine how N-partitioning is driven by neighbor interactions. Methods We conducted a transplantation experiment using ten plant communities, each comprising a different combination of Kobresia humilis, Stipa aliena, and Saussurea superba. Soil was sprayed uniformly with a mixture of (NH4)(2)SO4, KNO3, and glycine (C2H5NO2) (1:1:1 by mass of N, each containing one form of N-15) after growing for 45 days. Results Across three species, the N-uptake pattern was NO3- > NH4+ > glycine (NO3-: 58.47%; NH4+: 26.91%; glycine: 14.62%). Neighbor presence had species-specific effects on N-15 recovery. Kobresia humilis took up more N-15-NO3- when it was in competition with other species, whereas Stipa aliena and Saussurea superba took up more N-15-NH4+ and N-15-glycine, respectively. Conclusions Plasticity in N resource utilization of the three species was limited. The species competed for N resources proportionally to the availability of these sources, and tended to partition niches. These findings provide important insights into how plant species grow together in alpine grasslands. |
关键词 | Niche complementarity Kobresia humilis Stipa aliena Saussurea superba N-15 Resource competition |
文献类型 | 期刊论文 |
条目标识符 | http://210.75.249.4/handle/363003/59729 |
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, Li,Pang, Rui,Xu, Xingliang,et al. Three Tibetan grassland plant species tend to partition niches with limited plasticity in nitrogen use[J]. PLANT AND SOIL,2019,441. |
APA | Zhang, Li.,Pang, Rui.,Xu, Xingliang.,Song, Minghua.,Li, Yikang.,...&Ouyang, Hua.(2019).Three Tibetan grassland plant species tend to partition niches with limited plasticity in nitrogen use.PLANT AND SOIL,441. |
MLA | Zhang, Li,et al."Three Tibetan grassland plant species tend to partition niches with limited plasticity in nitrogen use".PLANT AND SOIL 441(2019). |
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