Affiliation:
1. State Key Laboratory of Desert and Oasis Ecology, Key Laboratory of Ecological Security and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
2. Institute of Botany and Phytointroduction, Ministry of Ecology and Natural Resources of the Republic of Kazakhstan, Almaty 050040, Kazakhstan
Abstract
International interest is growing in biodiversity conservation and sustainable use in drylands. Desert ecosystems across arid Central Asia are severely affected by global change. Understanding the changes in a plant community is an essential prerequisite to revealing the community assembly mechanism, vegetation conservation, and management. The knowledge of large-scale spatial variation in plant community structure in different Central Asian deserts is still limited. In this study, we selected the Taukum (TD, Kazakhstan) and the Gurbantunggut (GD, China) deserts as the research area, with similar latitudes despite being nearly 1000 km apart. Thirteen and 15 sampling plots were set up and thoroughly investigated. The differences in community structure depending on multiple plant attributes (individual level: plant height, canopy diameter, and plant volume, and community level: plant density, total cover, and total volume) were systematically studied. TD had a better overall environmental status than GD. A total of 113 species were found, with 68 and 74 in TD and GD, respectively. The number of species and plant attributes was unequally distributed across different families and functional groups between deserts. The values of several plant attributes, such as ephemerals, annuals, dicotyledons, and shrubs with assimilative branches in GD, were significantly lower than those in TD. The Motyka indices of six plant attributes (26.18–38.61%) were higher between the two deserts than the species similarity index (20.4%), indicating a more robust convergence for plant functional attributes. The community structures in the two deserts represented by different plant attribute matrices demonstrated irregular differentiation patterns in ordination diagrams. The most variance in community structure was attributed to soil and climatic factors, while geographic factors had the smallest proportion. Consequently, the community structures of the two distant deserts were both different and similar to an extent. This resulted from the long-term impacts of heterogeneous environments within the same region. Our knowledge is further deepened by understanding the variation in community structure in different deserts on a large spatial scale. This therefore provides valuable insights into conserving regional biodiversity in Central Asia.
Funder
Leading Talents in Sci-Technological Innovation Project of “Tianshan Talent” Training Plan of Xinjiang Uygur Autonomous Region
Third Xinjiang Scientific Expedition
National Natural Science Foundation of China
Subject
Plant Science,Ecology,Ecology, Evolution, Behavior and Systematics
Reference64 articles.
1. Naeem, E.B.S., Bunker, D.E., Hector, A., and Perrings, C. (2009). Biodiversity, Ecosystem Functioning, and Human Well-Being: An Ecological and Economic Perspective, Oxford University Press.
2. The supply of multiple ecosystem services requires biodiversity across spatial scales;Schenk;Nat. Ecol. Evol.,2022
3. Challenges and solutions to biodiversity conservation in arid lands;Zhang;Sci. Total Environ.,2023
4. Chen, X. (2010). Physical Geography of Arid Land in China, Science Press. (In Chinese).
5. Plant diversity in the human diet: Weak phylogenetic signal indicates breadth;Proches;Bioscience.,2008