5. CONCLUSION
Drought
and heat stress generally inhibited the characteristic indexes of alpine
meadow plants. The effect of a single factor on height and LWC was
greater than that of multiple factors combined, and the photosynthetic
indexes were more sensitive to multiple factors combined than a single
factor. Additionally, the response of four alpine meadow plant species
to SM was more sensitive than that to DT. Moreover, our results showed
that the Pn and Tr of K. humilis and P. annua had similar
response patterns to stress; the same was true for the response patterns
of the same photosynthetic characteristics of O. ochrocephala andS. pulchra . Overall, K. humilis and P. annuaadapted to and resisted less the stress treatment than O.
ochrocephala and S. pulchra . The findings of this study reveal
the regularities and differences in the response patterns of different
functional groups of plants to environmental stress in an alpine meadow.
Additionally, our results provide a theoretical basis for the rational
utilization of grassland resources in alpine meadows in the context of
climate change.
ACKNOWLEDGMENTS
This work was supported by the National Natural Science Foundation of
China (31672475), Natural Science Foundation of Qinghai Province
(2019-ZJ-908), National Key Research and Development Program of China
(2016YFC0501901), and the Second Comprehensive Scientific Investigation
of the Tibetan Plateau (2019QZKK0302).
AUTHOR CONTRIBUTIONS
Formal analysis, Li Ma; data curation, Zhonghua Zhang; data curation
Bingrong Zhou; software, Manhou Xu; writing-review and editing, Huakun
Zhou. All authors have read and agreed to the published version of the
manuscript.
CONFLICT OF INTEREST
The authors declare no conflict of interest
DATA ACCESSIBILITY STATEMENT
If the paper has a chance to be accepted, the authors will deposit their
data in Dryad