Effects of grazing pressure on plant species composition and water presence on bofedales in the Andes mountain range of Bolivia.

IF 1.5 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES

Mires and Peat Pub Date : 2018-01-01 DOI:10.19189/MAP.2017.OMB.303

N. C. Machaca, B. Condori, A. Pardo, F. Anthelme, R. I. Meneses, C. Weeda, H. Perotto‐Baldivieso

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引用次数: 19

Abstract

Bofedales are high-Andean peatland plant communities with high capacity for water retention, which are regarded as oases of biodiversity. These areas have great social and economic value for livestock grazing, which plays an important role in their vegetation dynamics. However, the effects of increased livestock pressure on vegetation composition and surface water have not yet been clarified. The goal of this study was to assess the impact of current grazing practices on bofedal vegetation, species diversity and function. Specifically, the study aimed to (1) quantify carrying capacity and stocking rate in grazed bofedales and (2) quantify the effects of grazing pressure on plant composition and the extents of bare soil and surface water. Biomass and stocking rate estimates for 25 bofedales along the Cordillera Real (Tropical Andes, Bolivia) showed that all bofedales were overgrazed (carrying capacity/stocking rate (CC/SR) <1). Regression analyses showed significant decreases in number of plant species, species dominance, diversity and percent surface water as CC/SR declined (p < 0.05). Bofedales are negatively affected by increased grazing pressure and potentially affected by changes in livestock species. These pressures, combined with land use changes and climate change, could result in long-term negative effects for the ecological functioning and sustainability of bofedale

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放牧压力对玻利维亚安第斯山脉山地植物种类组成和水分存在的影响

Bofedales是安第斯高原泥炭地植物群落，具有较高的保水能力，被认为是生物多样性的绿洲。这些地区的畜牧业具有巨大的社会经济价值，在植被动态中起着重要作用。然而，牲畜压力增加对植被组成和地表水的影响尚未明确。本研究的目的是评估当前放牧方式对水生植被、物种多样性和功能的影响。具体而言，本研究旨在(1)量化放牧牧草的承载能力和载畜率;(2)量化放牧压力对植物组成、裸土和地表水程度的影响。沿玻利维亚热带安第斯山脉的25头牛的生物量和载畜率估算表明，所有牛都被过度放牧(承载能力/载畜率(CC/SR) <1)。回归分析表明，随着CC/SR的降低，植物种类数、物种优势度、多样性和地表水百分比显著降低(p < 0.05)。Bofedales受到放牧压力增加的负面影响，并可能受到牲畜种类变化的影响。这些压力，加上土地利用变化和气候变化，可能对博菲代尔的生态功能和可持续性造成长期的负面影响

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来源期刊

Mires and Peat ENVIRONMENTAL SCIENCES-

CiteScore

2.30

自引率

16.70%

发文量

审稿时长

33 weeks

期刊介绍： Mires and Peat is a peer-reviewed internet journal focusing specifically on mires, peatlands and peat. As a truly “free-to-users” publication (i.e. NO CHARGES to authors OR readers), it is immediately accessible to readers and potential authors worldwide. It is published jointly by the International Peatland Society (IPS) and the International Mire Conservation Group (IMCG). Mires and Peat is indexed by Thomson Reuters Web of Science (2017 Impact Factors: 1.326 [two-year] and 1.638 [five-year]), Elsevier Scopus, EBSCO Environment Complete, CABI Abstracts, CSA Proquest (including their Aquatic Science and Fisheries Abstracts ASFA, Ecology, Entomology, Animal Behavior, Aqualine and Pollution databases) and Directory of Open Access Journals (DOAJ). Mires and Peat also participates in the CABI Full Text Repository, and subscribes to the Portico E-journal Preservation Service (LTPA). Mires and Peat publishes high-quality research papers on all aspects of peatland science, technology and wise use, including: ecology, hydrology, survey, inventory, classification, functions and values of mires and peatlands; scientific, economic and human aspects of the management of peatlands for agriculture, forestry, nature conservation, environmental protection, peat extraction, industrial development and other purposes; biological, physical and chemical characteristics of peat; and climate change and peatlands. Short communications and review articles on these and related topics will also be considered; and suggestions for special issues of the Journal based on the proceedings of conferences, seminars, symposia and workshops will be welcomed. The submission of material by authors and from countries whose work would otherwise be inaccessible to the international community is particularly encouraged.