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受人工改变降雨量影响的草原根系生产的年际变化。

Interannual variation in root production in grasslands affected by artificially modified amount of rainfall.

作者信息

Fiala Karel, Tůma Ivan, Holub Petr

机构信息

Department of Vegetation Ecology, Institute of Botany, Academy of Sciences of the Czech Republic, Lidická 25, 602 00 Brno, Czech Republic.

出版信息

ScientificWorldJournal. 2012;2012:805298. doi: 10.1100/2012/805298. Epub 2012 May 2.

DOI:10.1100/2012/805298
PMID:22629201
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3353563/
Abstract

The effect of different amounts of rainfall on the below-ground plant biomass was studied in three grassland ecosystems. Responses of the lowland (dry Festuca grassland), highland (wet Cirsium grassland), and mountain (Nardus grassland) grasslands were studied during five years (2006-2010). A field experiment based on rainout shelters and gravity irrigation simulated three climate scenarios: rainfall reduced by 50% (dry), rainfall increased by 50% (wet), and the natural rainfall of the current growing season (ambient). The interannual variation in root increment and total below-ground biomass reflected the experimentally manipulated amount of precipitation and also the amount of current rainfall of individual years. The effect of year on these below-ground parameters was found significant in all studied grasslands. In comparison with dry Festuca grassland, better adapted to drought, submontane wet Cirsium grassland was more sensitive to the different water inputs forming rather lower amount of below-ground plant matter at reduced precipitation.

摘要

在三个草原生态系统中研究了不同降雨量对地下植物生物量的影响。在五年期间（2006 - 2010年）研究了低地（干旱羊茅草原）、高地（湿润蓟属草原）和山地（垂穗草草原）草原的响应。基于遮雨棚和重力灌溉的田间试验模拟了三种气候情景：降雨量减少50%（干旱）、降雨量增加50%（湿润）以及当前生长季节的自然降雨量（环境条件）。根系增量和地下总生物量的年际变化反映了实验控制的降水量以及各年份的当前降雨量。在所有研究的草原中，年份对这些地下参数的影响均显著。与更适应干旱的干旱羊茅草原相比，亚山地湿润蓟属草原对不同水分输入更为敏感，在降水量减少时形成的地下植物物质数量相对较低。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f3/3353563/cc0861c9cefd/TSWJ2012-805298.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f3/3353563/626fc52abc89/TSWJ2012-805298.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f3/3353563/164ea40141d9/TSWJ2012-805298.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f3/3353563/c70fbea11dfa/TSWJ2012-805298.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f3/3353563/d795b2ff1917/TSWJ2012-805298.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f3/3353563/cc0861c9cefd/TSWJ2012-805298.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f3/3353563/626fc52abc89/TSWJ2012-805298.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f3/3353563/164ea40141d9/TSWJ2012-805298.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f3/3353563/c70fbea11dfa/TSWJ2012-805298.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f3/3353563/d795b2ff1917/TSWJ2012-805298.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f3/3353563/cc0861c9cefd/TSWJ2012-805298.005.jpg

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本文引用的文献

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A rainout shelter design for intercepting different amounts of rainfall.一种用于拦截不同降雨量的防雨棚设计。
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2
Root production, turnover and respiration under two grassland types along an altitudinal gradient: influence of temperature and solar radiation.沿海拔梯度的两种草地类型下根系的产生、周转和呼吸：温度和太阳辐射的影响
Oecologia. 1998 Mar;114(1):20-30. doi: 10.1007/s004420050415.
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Drought effects on above- and belowground production of a grazed temperate grassland ecosystem.
干旱对温带放牧草原生态系统地上和地下生产的影响。
Oecologia. 2007 May;152(1):131-9. doi: 10.1007/s00442-006-0632-8. Epub 2006 Dec 16.
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Vegetation structure constrains primary production response to water availability in the Patagonian steppe.植被结构限制了巴塔哥尼亚草原初级生产力对水分供应的响应。
Ecology. 2006 Apr;87(4):952-62. doi: 10.1890/0012-9658(2006)87[952:vscppr]2.0.co;2.
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Geographical and interannual variability in biomass partitioning in grassland ecosystems: a synthesis of field data.草原生态系统生物量分配的地理和年际变异性：实地数据综合分析
New Phytol. 2006;169(1):85-93. doi: 10.1111/j.1469-8137.2005.01569.x.
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Drought effects on fine-root and ectomycorrhizal-root biomass in managed Pinus oaxacana Mirov stands in Oaxaca, Mexico.干旱对墨西哥瓦哈卡州人工管理的瓦哈卡松林中细根和外生菌根根生物量的影响。
Mycorrhiza. 2006 Mar;16(2):117-124. doi: 10.1007/s00572-005-0022-9. Epub 2005 Dec 2.
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Rainfall variability, carbon cycling, and plant species diversity in a mesic grassland.湿润草原的降雨变率、碳循环与植物物种多样性
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