Temperature-driven convergence and divergence of ecohydrological dynamics in the ecosystems of a sky island mountain range

IF 2.5 3区 环境科学与生态学 Q2 ECOLOGY Ecohydrology Pub Date : 2024-10-07 DOI:10.1002/eco.2703
Matthew D. Petrie, John B. Bradford, Daniel R. Schlaepfer
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Abstract

Forest and woodland decline is predicted to be increasingly influenced by meteorological variation and climate change in the future. By determining how meteorological variation leads to similar versus differing ecohydrological dynamics of forest and woodland ecosystems, we can gain insight on how future climate-driven declines may be realized. We characterized 23 mixed conifer forest (MC), ponderosa pine forest (PP) and piñon pine–juniper woodland (PJ) sites with different canopy covers in southern Nevada, USA. We compared meteorological variation between these sites and employed water balance modelling and information theory to estimate similarity in the density distributions of soil temperature (Ts), soil water potential (SWP) and transpiration partitioning into total evapotranspiration (T/ET) within and across ecosystems in wetter and drier seasons and in cooler and warmer decades. From 1941 to 2020, this location experienced declines in meteorological water deficit due to higher precipitation, although temperatures increased over more recent time periods (1981–2020). From 1981 to 2020, we generally found greater similarity in SWP and T/ET distributions within MC sites and PP sites in the cool season and in the warm season generally found greater similarity in Ts and T/ET distributions within and between PP and PJ sites (excepting T/ET between PJ sites and higher canopy cover PP sites). Recent warm decades promoted convergence in warm and cool season Ts dynamics, such that Ts dynamics generally became more similar between higher elevation MC sites and lower elevation PP–PJ sites. At the same time, warmer decades initiated divergence of SWP and T/ET dynamics within groups of MC–PP and PP–PJ sites that were formerly more similar to each other (excepting SWP in wet seasons). Although their dynamics will remain strongly coupled to precipitation, warming temperatures have the potential to promote divergence in the ecohydrological dynamics of ecosystems at lower and higher elevations in this sky island system and may also promote novel within-ecosystem divergence associated with variation in vegetation structural attributes.

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温度驱动的天空岛山脉生态系统生态水文动态的趋同与分化
据预测,未来森林和林地的减少将越来越多地受到气象变化和气候变化的影响。通过确定气象变化如何导致森林和林地生态系统的生态水文动态相似或不同,我们可以深入了解未来气候驱动的衰退可能是如何实现的。我们对美国内华达州南部 23 个具有不同树冠覆盖率的针阔混交林 (MC)、松柏林 (PP) 和皮农松-桧木林 (PJ) 地点进行了特征描述。我们比较了这些地点之间的气象变化,并利用水平衡模型和信息理论估算了在较湿和较干的季节以及较冷和较热的十年中,生态系统内部和生态系统之间土壤温度(Ts)、土壤水势(SWP)和蒸腾作用在总蒸散量(T/ET)中的分配密度分布的相似性。从 1941 年到 2020 年,由于降水量增加,该地点的气象缺水量有所下降,但最近一段时间(1981-2020 年)的气温有所上升。从 1981 年到 2020 年,在冷季,我们普遍发现 MC 点和 PP 点内部的 SWP 和 T/ET 分布更为相似;在暖季,我们普遍发现 PP 点和 PJ 点内部及之间的 Ts 和 T/ET 分布更为相似(PJ 点和冠层覆盖率较高的 PP 点之间的 T/ET 除外)。最近几十年的暖季使暖季和冷季的 Ts 动态趋于一致,因此海拔较高的 MC 点和海拔较低的 PP-PJ 点之间的 Ts 动态一般变得更加相似。与此同时,温暖的几十年也导致了原来较为相似的 MC-PP 和 PP-PJ 点群内部 SWP 和 T/ET 动力的分化(湿季 SWP 除外)。虽然它们的动态仍与降水密切相关,但气温升高有可能促使这个天空岛系统中海拔较低和海拔较高的生态系统的生态水文动态出现分化,也可能促使生态系统内部出现与植被结构属性变化相关的新的分化。
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来源期刊
Ecohydrology
Ecohydrology 环境科学-生态学
CiteScore
5.10
自引率
7.70%
发文量
116
审稿时长
24 months
期刊介绍: Ecohydrology is an international journal publishing original scientific and review papers that aim to improve understanding of processes at the interface between ecology and hydrology and associated applications related to environmental management. Ecohydrology seeks to increase interdisciplinary insights by placing particular emphasis on interactions and associated feedbacks in both space and time between ecological systems and the hydrological cycle. Research contributions are solicited from disciplines focusing on the physical, ecological, biological, biogeochemical, geomorphological, drainage basin, mathematical and methodological aspects of ecohydrology. Research in both terrestrial and aquatic systems is of interest provided it explicitly links ecological systems and the hydrologic cycle; research such as aquatic ecological, channel engineering, or ecological or hydrological modelling is less appropriate for the journal unless it specifically addresses the criteria above. Manuscripts describing individual case studies are of interest in cases where broader insights are discussed beyond site- and species-specific results.
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Issue Information Temperature-driven convergence and divergence of ecohydrological dynamics in the ecosystems of a sky island mountain range Issue Information Soil Building and Capillary Barrier–Enhanced Water Availability Help Explain Pisonia grandis and Other Atoll Native's Tolerance for Variable Precipitation Regimes Analysis of Research Hot Spots in Chinese and International English Ecohydrological Literature
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