Grazing regulates temperate grassland multidimensional stability facing extreme winter snowfall reductions by influencing below-ground bud density

IF 5.6 1区 环境科学与生态学 Q1 ECOLOGY Journal of Ecology Pub Date : 2025-02-17 DOI:10.1111/1365-2745.70007
Tongtian Guo, Hao Zhang, Meiqi Guo, Gaowen Yang, Hengkang Xu, Xin Jing, Nan Liu, Yingjun Zhang
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放牧通过影响地下芽密度调节温带草地面对极端冬季降雪量减少的多维稳定性
全球气候变化增加了北半球降雪减少事件的频率,从而抑制了植物生产力。放牧是草原最广泛的利用方式,它通过塑造群落结构来影响生产力,以应对极端气候。由于放牧会破坏植物的正常生长和繁殖,在生长季节的不同阶段放牧休息可能对地上和地下群落特性产生不同的影响。然而,在极端降雪量下,不同生长季节阶段的放牧或休牧对草地稳定性的影响尚不清楚。在发生自然极端降雪量减少事件的时间依赖性策略休息放牧实践(生长早期、高峰和后期休息)下,研究了地上净初级生产力(ANPP)的多维稳定性(抗性、弹性、恢复力和时间稳定性)。我们还评估了植物丰富度、优势度、异步性、关键功能群稳定性和地下芽密度,以探讨多维稳定性的机制。研究发现,极端降雪量的减少显著降低了所有放牧方式下的草地ANPP。然而,与连续放牧相比,在生长高峰期短暂休息的放牧显著提高了ANPP,提高了抵抗极端降雪量减少的能力和恢复能力,从而大大提高了时间稳定性。相反,生育前期和后期的休牧并没有提高ANPP的时间稳定性。同时,恢复力不受放牧方式的影响。高峰休息的好处主要来自于在极端事件之前和之后形成足够的地下芽。值得注意的是,群落属性(如多样性或异步性)的变化与抗性和恢复无关。另外,峰顶休养地的草芽密度增加,通过增强多年生根茎草的稳定性和保持群落组成间接促进了时间稳定性。合成。这些发现强调了植物地下芽在应对降雪量减少时维持稳定的草地生产力中的重要作用,也表明草地管理策略应考虑保护植物无性生殖器官,这有助于面对未来气候变化时草地的可持续性。
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来源期刊
Journal of Ecology
Journal of Ecology 环境科学-生态学
CiteScore
10.90
自引率
5.50%
发文量
207
审稿时长
3.0 months
期刊介绍: Journal of Ecology publishes original research papers on all aspects of the ecology of plants (including algae), in both aquatic and terrestrial ecosystems. We do not publish papers concerned solely with cultivated plants and agricultural ecosystems. Studies of plant communities, populations or individual species are accepted, as well as studies of the interactions between plants and animals, fungi or bacteria, providing they focus on the ecology of the plants. We aim to bring important work using any ecological approach (including molecular techniques) to a wide international audience and therefore only publish papers with strong and ecological messages that advance our understanding of ecological principles.
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