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Wan Y, Peng L, Anwaier A, Shi H, Li D, Ma Y, Shi Q. Effects of meteorological factors and groundwater depths on sap flow density of Populus euphratica in a desert oasis, Taklamakan Desert, China. FRONTIERS IN PLANT SCIENCE 2024; 15:1330426. [PMID: 38405581 PMCID: PMC10884297 DOI: 10.3389/fpls.2024.1330426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 01/23/2024] [Indexed: 02/27/2024]
Abstract
Accurate estimation of desert vegetation transpiration is key to regulating desert water resources of desert ecosystems. Sap flow density (SFD) can indirectly reflect a tree's transpiration consumption, and it has been affected by climate warming and groundwater depths in desert ecosystems. Sap flow responses to meteorological conditions and groundwater depths are further affected by tree of different sizes. However, how meteorological factors and groundwater depths affects tree sap flow among tree sizes remains poorly understand. In this study, a 50 × 50 m P. euphratica stand was selected as a sample plot in the hinterland of the Taklamakan Desert, and the SFD of P. euphratica of different sizes was measured continuously using the thermal diffusion technique from May to October of 2021 and 2022. The results showed that SFD of large P. euphratica was consistently higher than that of small P. euphratica in 2021 and 2022. and the SFD of P. euphratica was significantly and positively correlated with solar radiation (Rad) and vapor pressure deficit (VPD), and the correlation was higher than that of the air temperature (Ta) and relative humidity (RH), and also showed a strong non-linear relationship. Analysis of the hour-by-hour relationship between P. euphratica SFD and VPD and Rad showed a strong hysteresis. Throughout the growing season, there was no significant relationship between SFD of P. euphratica and groundwater depth, VPD and Rad were still the main controlling factors of SFD in different groundwater depths. However, during the period of relative groundwater deficit, the effect of groundwater depth on the SFD of P. euphratica increased, and the small P. euphratica was more sensitive, indicating that the small P. euphratica was more susceptible to groundwater changes. This study emphasized that Rad and VPD were the main drivers of SFD during the growing season, as well as differences in the response of different sizes of P. euphratica to groundwater changes. The results of the study provide a scientific basis for future modeling of transpiration consumption in P. euphratica forests in desert oases, as well as the regulation and allocation of water resources.
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Affiliation(s)
- Yanbo Wan
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi, China
| | - Lei Peng
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi, China
| | - Abudureyimu Anwaier
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi, China
| | - Haobo Shi
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi, China
| | - Dinghao Li
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi, China
| | - Yu Ma
- Urumqi Comprehensive Survey Center on Natural Resources, China Geological Survey, Urumqi, China
| | - Qingdong Shi
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi, China
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Erkin F, Yue D, Abdureyim A, Huang W, Tayir M. Link between the aboveground and belowground biomass allocation with growing of Tamarix sp. seedlings in the hinterland of Taklimakan Desert, China. PLoS One 2023; 18:e0289670. [PMID: 37585434 PMCID: PMC10431640 DOI: 10.1371/journal.pone.0289670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 07/24/2023] [Indexed: 08/18/2023] Open
Abstract
The morphological characteristics and biomass allocation can reflect plant adaptive strategies to the environment. Tamarix sp. is an excellent shrub species used for windbreaks and fixing sand in the desert of northwest China. The successful establishment of Tamarix sp. seedlings and their growth into mature individuals require their adaptation to various environmental conditions, which is the key to naturally regenerating the Tamarix population. To clarify the root morphological characteristics, leaf structural characters, and biomass allocation of Tamarix sp. seedlings in response to drought conditions, we took the Tamarix sp. seedlings at the Daryaboyi oasis in the hinterland of Taklimakan Desert as the object of study, analyzed rooting depth, root dry weight (RDW), specific root length (SRL), root surface area (RA), specific root area (SRA), leaf area (LA), specific leaf area (SLA) and root: shoot ratio (R:S ratio). The gravimetric soil water content varied from 5.80% to 25.84% in this study area. The taproots of Tamarix sp seedlings with small basal stem diameters were shallower and had few lateral root branches and Tamarix sp. seedlings with large basal stem diameters had more obvious taproots and lateral roots. With the growth of Tamarix sp. seedlings, the taproot deepened, and the values ranged from 4.5 cm to 108.0 cm; the SRL, SRA, and SLA decreased, and the ranges of the values were 28.92-478.79 cm·g-1, 1.07-458.50 cm2·g-1, and 24.48-50.7 cm2·g-1; the RDW, RA, and LA increased, the ranges of the values were 0.16-21.34 g, 3.42-328.04 cm2, and 2.41-694.45 cm2; the more biomass was allocated to the aboveground parts, and the mean R: S ratio was 0.76. In better soil water conditions, the root growth rate decreased as Tamarix sp. seedlings grew, and more biomass was allocated to the aboveground. This further showed that stable surface water is highly significant to the biomass allocation strategy of Tamarix sp. seedlings.
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Affiliation(s)
- Flora Erkin
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Ministry of Education, Xinjiang University, Urumqi, China
| | - Dai Yue
- Key Laboratory of Oasis Ecology, Ministry of Education, Xinjiang University, Urumqi, China
- College of Geography and Remote Sensing Science, Xinjiang University, Urumqi, China
| | - Anwar Abdureyim
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Ministry of Education, Xinjiang University, Urumqi, China
| | - Wanyuan Huang
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Ministry of Education, Xinjiang University, Urumqi, China
| | - Mawlida Tayir
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Ministry of Education, Xinjiang University, Urumqi, China
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Tayir M, Dai Y, Shi Q, Abdureyim A, Erkin F, Huang W. Distinct leaf functional traits of Tamarix chinensis at different habitats in the hinterland of the Taklimakan desert. FRONTIERS IN PLANT SCIENCE 2023; 13:1094049. [PMID: 36756227 PMCID: PMC9900739 DOI: 10.3389/fpls.2022.1094049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 12/19/2022] [Indexed: 06/18/2023]
Abstract
Leaf functional traits reflect plant adaptive strategies towards environmental heterogeneity. However, which factor play the key role of plasticity of leaf functional traits among various variable environmental factors remains unclear in desert hinterland oasis area. Here, we analyzed variations in leaf water content (LWC), δ 13C values of leaves (δ 13C), specific leaf area (SLA), leaf organic carbon concentration (LOC), leaf total nitrogen concentration (LTN), leaf total phosphorus concentration (LTP), and leaf C: N: P stoichiometry in Tamarix chinensis growing in five habitats at the Daliyabuyi, a natural pristine oasis in northwestern China, that differ abiotically and biotically. The spatial heterogeneity of leaf functional traits was evident. Abiotic factors vitally influence leaf functional traits, of which groundwater depth (GWD) and soil C: N stoichiometry (SOC: STN) are crucial. GWD exhibited close relationships with LWC (P < 0.05) and LOC: LTP (P < 0.01), but not δ 13C. Soil water content (SWC) and SOC: STN were negatively related to SLA (P < 0.01; P < 0.05). While, SOC: STN showed positive relationships with LOC: LTN (P < 0.05). As for biological factors, we found T. chinensis in habitat with Sophora alopecuroidies had the highest LTN, possibly as a result of N fixation of leguminous plants (S. alopecuroidies) promotes the N concentration of T. chinensis. Close relationships also existed between leaf functional traits, LWC showed significantly negatively relatd to δ 13C, LOC: LTN and LOC: LTP (P < 0.05), whereas δ 13C had positively correlated with LOC: LTN (P < 0.01) but negatively correlated with LTN (P < 0.05). T. chinensis had relative higher LWC couple with lower δ 13C, and exhibiting lower C, N, P in leaves and their stoichiometric ratios, and also lower SLA which compared with other terrestrial plant. Such coordinations suggesting that T. chinensis develops a suite of trait combinations mainly tends to more conservative to response local habitats in Daliyabuyi, which is contribute to understand desert plant resource acquisition and utilization mechanisms in extremely arid and barren environments.
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Affiliation(s)
- Mawlida Tayir
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi, China
| | - Yue Dai
- Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi, China
- Key Laboratory of Smart City and Environment Modelling of Higher Education Institute, Xinjiang University, Urumqi, China
- College of Geography and Remote Sensing Science, Xinjiang University, Urumqi, China
| | - Qingdong Shi
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi, China
| | - Anwar Abdureyim
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi, China
| | - Flora Erkin
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi, China
| | - Wanyuan Huang
- College of Ecology and Environment, Xinjiang University, Urumqi, China
- Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi, China
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Shi H, Shi Q, Li H, Zhou X, Dai Y, Kahaer Y, Wan Y, Peng L. The combined effect of surface water and groundwater on environmental heterogeneity reveals the basis of beta diversity pattern in desert oasis communities. PLoS One 2022; 17:e0279704. [PMID: 36574442 PMCID: PMC9794059 DOI: 10.1371/journal.pone.0279704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 12/13/2022] [Indexed: 12/28/2022] Open
Abstract
Beta diversity indicates the species turnover with respect to a particular environmental gradient. It is crucial for understanding biodiversity maintenance mechanisms and for prescribing conservation measures. In this study, we aimed to reveal the drivers of beta diversity patterns in desert hinterland oasis communities by establishing three types of surface water disturbance and groundwater depth gradients. The results indicated that the dominant factor driving the beta diversity pattern within the same gradient shifted from soil organic matter to pH, as groundwater depth became shallower and surface water disturbance increased. Among the different gradients, surface water disturbance can have important effects on communities where original water resource conditions are extremely scarce. Under the premise that all habitats are disturbed by low surface water, differences in groundwater depth dominated the shifts in the community species composition. However, when groundwater depth in each habitat was shallow, surface water disturbance had little effect on the change in species composition. For the two components of beta diversity, the main drivers of species turnover pattern was the unique effects of surface water disturbance and soil environmental differences, and the main driver of species nestedness pattern was the common effect of multiple environmental pressures. The results of this study suggest that increasing the disturbance of surface water in dry areas with the help of river flooding will help in promoting vegetation restoration and alleviating the degradation of oases. They also confirm that surface water and groundwater mutually drive the establishment of desert oasis communities. Equal focus on both factors can contribute to the rational ecological recovery of dryland oases and prevent biodiversity loss.
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Affiliation(s)
- Haobo Shi
- College of Ecology and Environment, Xinjiang University, Urumqi, 830046, China
- Key Laboratory of Oasis Ecology of Education Ministry, Xinjiang University, Urumqi, 830046, China
| | - Qingdong Shi
- College of Ecology and Environment, Xinjiang University, Urumqi, 830046, China
- Key Laboratory of Oasis Ecology of Education Ministry, Xinjiang University, Urumqi, 830046, China
- * E-mail:
| | - Hao Li
- Provost’s Office and Academic Affairs, Beijing Normal University at Zhuhai, Zhuhai, 519087, China
| | - Xiaolong Zhou
- College of Ecology and Environment, Xinjiang University, Urumqi, 830046, China
- Key Laboratory of Oasis Ecology of Education Ministry, Xinjiang University, Urumqi, 830046, China
| | - Yue Dai
- College of Geography and Remote Sensing Sciences, Xinjiang University, Urumqi, 830046, China
| | - Yasenjiang Kahaer
- College of Ecology and Environment, Xinjiang University, Urumqi, 830046, China
- Key Laboratory of Oasis Ecology of Education Ministry, Xinjiang University, Urumqi, 830046, China
| | - Yanbo Wan
- College of Ecology and Environment, Xinjiang University, Urumqi, 830046, China
- Key Laboratory of Oasis Ecology of Education Ministry, Xinjiang University, Urumqi, 830046, China
| | - Lei Peng
- College of Ecology and Environment, Xinjiang University, Urumqi, 830046, China
- Key Laboratory of Oasis Ecology of Education Ministry, Xinjiang University, Urumqi, 830046, China
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