Simulated precipitation change drives plant diversity and biomass change in the desert steppe

IF 1.7 4区生物学 Q2 PLANT SCIENCES

Plant Ecology & Diversity Pub Date : 2022-06-13 DOI:10.1080/17550874.2022.2101154

Yuehua Wang, Haigang Li, Hailian Sun, Tingting Shen, Xiao-yu Song, Zhanwen Wang, Zhongwu Wang, G. Han

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引用次数: 2

Abstract

ABSTRACT Background There is a large uncertainty regarding the direction and magnitude of projected changes in the pattern and quantity of precipitation in future climate change scenarios. As changes in precipitation are likely to greatly impact plant diversity and biomass in desert ecosystems, we undertook a water addition/exclusion experiment to quantify the responses of plant diversity and biomass. Aims To quantify the short-term impacts of changing the quantity of precipitation on plant species diversity and productivity in a desert steppe ecosystem. Methods A simulated precipitation manipulation (addition and exclusion) experiment was made with four treatments: precipitation decreased by 50% (P-50%), precipitation increased by 50% (P+50%), precipitation increased by 100% (P+100%) and natural precipitation (Control). Results The richness of annual and biennial species was related to treatment; above-ground biomass increased in dry years in the P+100% treatment. Water addition had no statistically significant impacts on below-ground biomass. Conclusion Increase in above-ground biomass with added precipitation in a drought year was mainly contributed by perennial grasses, suggesting that, from a management point of view, perennial grasses should be the focus of mitigation of projected future precipitation changes.

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模拟降水变化驱动荒漠草原植物多样性和生物量变化

背景:在未来气候变化情景中，预估的降水模式和数量变化的方向和幅度存在很大的不确定性。由于降水变化对荒漠生态系统植物多样性和生物量的影响较大，我们开展了加水/疏水实验来量化植物多样性和生物量的响应。目的定量研究降水量变化对荒漠草原生态系统植物物种多样性和生产力的短期影响。方法采用模拟降水操纵(加减)试验，设降水量减少50% (P-50%)、降水量增加50% (P+50%)、降水量增加100% (P+100%)和自然降水(对照)4个处理。结果一年生和二年生物种丰富度与处理有关;P+100%处理在干旱年份地上生物量增加。添加水分对地下生物量无显著影响。结论干旱年地上生物量随降水增加而增加的主要原因是多年生禾本科植物，从管理角度看，多年生禾本科植物应成为缓解未来预估降水变化的重点。

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来源期刊

Plant Ecology & Diversity PLANT SCIENCES-

CiteScore

3.30

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Plant Ecology and Diversity is an international journal for communicating results and novel ideas in plant science, in print and on-line, six times a year. All areas of plant biology relating to ecology, evolution and diversity are of interest, including those which explicitly deal with today''s highly topical themes, such as biodiversity, conservation and global change. We consider submissions that address fundamental questions which are pertinent to contemporary plant science. Articles concerning extreme environments world-wide are particularly welcome. Plant Ecology and Diversity considers for publication original research articles, short communications, reviews, and scientific correspondence that explore thought-provoking ideas. To aid redressing ‘publication bias’ the journal is unique in reporting, in the form of short communications, ‘negative results’ and ‘repeat experiments’ that test ecological theories experimentally, in theoretically flawless and methodologically sound papers. Research reviews and method papers, are also encouraged. Plant Ecology & Diversity publishes high-quality and topical research that demonstrates solid scholarship. As such, the journal does not publish purely descriptive papers. Submissions are required to focus on research topics that are broad in their scope and thus provide new insights and contribute to theory. The original research should address clear hypotheses that test theory or questions and offer new insights on topics of interest to an international readership.