Responses of two dominant desert plant species to the changes in groundwater depth in hinterland natural oasis, Tarim Basin.
Responses of two dominant desert plant species to the changes in groundwater depth in hinterland natural oasis, Tarim Basin.
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塔里木盆地腹地天然绿洲两种优势荒漠植物对地下水埋深变化的响应
DOI：
10.1002/ece3.7766
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发表时间：
2021-07
影响因子：
2.6
通讯作者：
Nijat M
中科院分区：
文献类型：
--
作者：
Imin B;Dai Y;Shi Q;Guo Y;Li H;Nijat M
摘要干旱内陆河流域频繁的断流事件使地下水日益成为荒漠植物生长和繁殖的永久稳定水源。地下水可利用性对植物维持生态功能具有重要影响，但塔里木盆地中部达里亚博依绿洲荒漠植物对地下水可利用性的水分利用策略却鲜为人知。本研究基于生态和形态参数，包括基于无人机的植被覆盖率（FVC）图像和植物生长状况，初步确定了理想的和有压力的地下水深度。然后，通过对小型和大型植物叶片δ 13 C值的分析，揭示了两种优势木本植物（胡杨和多枝柽柳）对地下水埋深梯度的水分利用策略。根据植被的生长状况和FVC的变化，地下水埋深应控制在2.1- 4.3m，最小埋深应小于7 m。这将确保保护河岸木本植物处于正常生长状态，并保证两种植物类型的共存。在理想的地下水条件下，水交替（即，洪水和地下水位上升）是影响植物水分利用效率变化的主要因素。结果表明，大型植物比小型植物耐盐性更强;多枝胡杨比胡杨具有更强的耐盐性。干旱条件下，随着地下水埋深的增加，胡杨不断降低其生长状态以维持水力效率;多枝花主要表现为先提高水分利用效率，后降低生长状况。此外，在干旱条件下，T.多枝胡杨比胡杨适应性强。本研究将为达里亚博依绿洲的生态恢复和可持续管理提供信息，并为今后的研究提供参考。
Abstract Groundwater is increasingly becoming a permanent and steady water source for the growth and reproduction of desert plant species due to the frequent channel cutoff events in arid inland river basins. Although it is widely acknowledged that the accessibility of groundwater has a significant impact on plant species maintaining their ecological function, little is known about the water use strategies of desert plant species to the groundwater availability in Daryaboyi Oasis, Central Tarim Basin. This study initially determined the desirable and stressing groundwater depths based on ecological and morphological parameters including UAV‐based fractional vegetation cover (FVC) images and plant growth status. Then, leaf δ13C values of small‐ and big‐sized plants were analyzed to reveal the water use strategies of two dominant woody species (Populus euphratica and Tamarix ramosissima) in response to the groundwater depth gradient. The changes in FVC and growth status of plants suggested that the actual groundwater depth should be kept at an appropriate range of about 2.1–4.3 m, and the minimum groundwater depth should be less than 7 m. This will ensure the protection of riparian woody plants at a normal growth state and guarantee the coexistence of both plant types. Under a desirable groundwater condition, water alternation (i.e., flooding and rising groundwater depth) was the main factor influencing the variation of plant water use efficiency. The obtained results indicated that big‐sized plants are more salt‐tolerant than small ones, and T. ramosissima has strong salt palatability than P. euphratica. With increasing groundwater depth, P. euphratica continuously decreases its growth status to maintain hydraulic efficiency in drought condition, while T. ramosissima mainly increases its water use efficiency first and decreases its growth status after then. Besides, in a drought condition, T. ramosissima has strong adaptability than P. euphratica. This study will be informative for ecological restoration and sustainable management of Daryaboyi Oasis and provides reference materials for future research programs.
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影响因子：
5.2
作者：
Galicia-Campos, Estrella;Ramos-Solano, Beatriz;Garcia-Villaraco, Ana
通讯作者：
Garcia-Villaraco, Ana
影响因子：
1.5
作者：
Gatica, Mario Gabriel;Aranibar, Julieta N.;Pucheta, Eduardo
通讯作者：
Pucheta, Eduardo
影响因子：
3.7
作者：
Lang, Petra;Ahlborn, Julian;Thomas, Frank M.
通讯作者：
Thomas, Frank M.
DOI：
10.1016/j.palaeo.2017.07.015
发表时间：
2017-11-01
影响因子：
3
作者：
Bush, Rosemary T.;Wallace, Jon;Tabor, Neil J.
通讯作者：
Tabor, Neil J.
我国滨海盐碱地柽柳蒸散量及其对环境因子的响应
影响因子：
3.4
作者：
Chen, Huanyu;Yang, Ce;Wang, Jianlin
通讯作者：
Wang, Jianlin