Australian Rivers Institute, Griffith School of Environment, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia; Queensland Herbarium, Mt Coot-tha Road, Toowong, Queensland 4066, Australia.
Australian Rivers Institute, Griffith School of Environment, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia.
Sci Total Environ. 2023 Jun 1;875:162577. doi: 10.1016/j.scitotenv.2023.162577. Epub 2023 Mar 9.
Groundwater represents a critical water source for plants, especially during drought, with continuous groundwater availability widely associated with the presence of ecological refugia and the preservation of biodiversity during periods of adverse conditions. Here, we present a systematic quantitative literature review of global groundwater and ecosystem interactions to synthesise current knowledge and identify key knowledge gaps and research priorities through a management lens. Despite increasing research on groundwater dependent vegetation since the late 1990s, significant geographical and ecological biases are evident with papers focused on arid regions or areas with significant anthropogenic changes. Of the 140 papers reviewed, desert and steepe arid landscapes accounted for 50.7 % and desert and xeric shrublands were represented in 37.9 % of papers. A third of papers (34.4 %) quantified groundwater uptake by ecosystems and groundwater contributions to transpiration, with studies examining the influence of groundwater on vegetation productivity, distribution, and composition also well represented. In contrast, groundwater influences on other ecosystem functions are relatively poorly explored. The research biases introduce uncertainty in the transferability of findings between locations and ecosystems limiting the generality of our current understanding. This synthesis contributes to consolidating a solid knowledge base of the hydrological and ecological interrelationships for managers, planners, and other decision-makers that is relevant to the landscapes and environments they manage, so can more effectively deliver ecological and conservation outcomes.
地下水是植物的重要水源，尤其是在干旱时期，地下水的持续供应与生态避难所的存在以及在不利条件下保持生物多样性广泛相关。在这里，我们对全球地下水和生态系统相互作用进行了系统的定量文献综述，通过管理视角综合当前知识并确定关键的知识空白和研究重点。尽管自 20 世纪 90 年代末以来，对依赖地下水的植被的研究不断增加，但仍存在明显的地理和生态偏见，研究主要集中在干旱地区或受人类活动影响较大的地区。在综述的 140 篇论文中，沙漠和陡坡干旱景观占 50.7%，沙漠和干旱疏林灌木分别占 37.9%。三分之一的论文（34.4%）量化了生态系统对地下水的吸收和地下水对蒸腾作用的贡献，研究地下水对植被生产力、分布和组成的影响也得到了很好的体现。相比之下，地下水对其他生态系统功能的影响则相对较少被探索。研究的偏见导致了不同地点和生态系统之间研究结果的可转移性存在不确定性，限制了我们当前理解的普遍性。这项综合研究有助于为管理者、规划者和其他决策者巩固有关水文和生态相互关系的坚实知识库，这些知识与他们管理的景观和环境相关，因此可以更有效地实现生态和保护成果。
