Simulated Impacts of Stocking Rate and Climate Change Impact on Biomass and Livestock Weight Dynamics in Savanna Grassland

IF 2.9 3区环境科学与生态学 Q2 ECOLOGY

Rangeland Ecology & Management Pub Date : 2025-11-01 Epub Date: 2025-11-18 DOI:10.1016/j.rama.2025.10.004

Yeneayehu Fenetahun , Wang Yongdong , You Yuan , Ogbue Chukwuka , Yahaya Ibrahim , Xu Xinwen

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引用次数: 0

Abstract

Savanna grasslands are important ecosystems on a worldwide scale, supporting human livelihoods through grazing while serving as habitats for a variety of flora and wildlife. In this research, the complex interactions between climate change, grazing patterns, and their combined effects on the dynamics of livestock weight and biomass in savanna ecosystems are examined by using Soil-Plant-Atmosphere Continuum System (SPACSYS) model. Three stocking rates were utilized for the treatment sites where samples were collected in the grazing experiment: no-grazed (NG) (0 TLU/ha/Y), moderately grazed (MG) (2 TLU/ha/Y), and over grazed (OG) (4 TLU/ha/Y and above). Using various stoking rates, the aboveground biomass of the grass species and changes in livestock weight were predicted under three typical concentration pathways (RCP) scenarios (RCP 2.6, RCP 4.5, and RCP 8.5), which mostly focused on the severe drought period running from 2020 to 2023. Our results highlight the importance of grazing management techniques for mitigating the negative impacts of climate change on livestock productivity and biomass output. In addition, we stress the crucial importance of adaptive management strategies that consider socioeconomic and ecological aspects to assure the sustainability and resilience of savanna grassland ecosystems in the face environmental change.

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载畜率和气候变化对热带稀树草原生物量和牲畜体重动态的模拟影响

稀树草原是世界范围内重要的生态系统，通过放牧支持人类生计，同时也是各种植物和野生动物的栖息地。本文采用土壤-植物-大气连续统（SPACSYS）模型，研究了气候变化与放牧模式之间的复杂相互作用及其对草原生态系统牲畜体重和生物量动态的综合影响。放牧试验采集样地采用3种放养率：不放牧（NG）（0 TLU/ha/Y）、中度放牧（MG）（2 TLU/ha/Y）和过度放牧（OG）（4 TLU/ha/Y及以上）。以2020 ~ 2023年严重干旱期为研究对象，利用不同的放养率，预测了3种典型浓度路径（RCP 2.6、RCP 4.5和RCP 8.5）下草种地上生物量和牲畜体重的变化。我们的研究结果强调了放牧管理技术对于减轻气候变化对牲畜生产力和生物量产出的负面影响的重要性。此外，我们强调考虑社会经济和生态方面的适应性管理战略对于确保热带稀树草原生态系统在面临环境变化时的可持续性和复原力至关重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Rangeland Ecology & Management 农林科学-环境科学

CiteScore

4.60

自引率

13.00%

发文量

审稿时长

12-24 weeks

期刊介绍： Rangeland Ecology & Management publishes all topics-including ecology, management, socioeconomic and policy-pertaining to global rangelands. The journal''s mission is to inform academics, ecosystem managers and policy makers of science-based information to promote sound rangeland stewardship. Author submissions are published in five manuscript categories: original research papers, high-profile forum topics, concept syntheses, as well as research and technical notes. Rangelands represent approximately 50% of the Earth''s land area and provision multiple ecosystem services for large human populations. This expansive and diverse land area functions as coupled human-ecological systems. Knowledge of both social and biophysical system components and their interactions represent the foundation for informed rangeland stewardship. Rangeland Ecology & Management uniquely integrates information from multiple system components to address current and pending challenges confronting global rangelands.