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Interactive effects of warming and increased precipitation on community structure and composition in an annual forb dominated desert steppe.

Hou Y, Zhou G, Xu Z, Liu T, Zhang X - PLoS ONE (2013)

Bottom Line: Increased precipitation increased species richness while warming significantly decreased species richness, and their effects were additive rather than interactive.Although interannual variations in weather conditions may have a major affect on plant community composition on short term experiments, warming and precipitation treatments affected individual species and functional group composition.Warming caused C4 grasses such as Cleistogenes squarrosa to increase while increased precipitation caused the proportions of non-perennial C3 plants like Artemisia capillaris to decrease and perennial C4 plants to increase.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China.

ABSTRACT
To better understand how warming, increased precipitation and their interactions influence community structure and composition, a field experiment simulating hydrothermal interactions was conducted at an annual forb dominated desert steppe in northern China over 2 years. Increased precipitation increased species richness while warming significantly decreased species richness, and their effects were additive rather than interactive. Although interannual variations in weather conditions may have a major affect on plant community composition on short term experiments, warming and precipitation treatments affected individual species and functional group composition. Warming caused C4 grasses such as Cleistogenes squarrosa to increase while increased precipitation caused the proportions of non-perennial C3 plants like Artemisia capillaris to decrease and perennial C4 plants to increase.

Show MeSH
Monthly average temperature (top) and total monthly precipitation (bottom) in the growing season.Gray bars indicate the regional monthly averages (mean ± SE) from 1978 to 2007.
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pone-0070114-g001: Monthly average temperature (top) and total monthly precipitation (bottom) in the growing season.Gray bars indicate the regional monthly averages (mean ± SE) from 1978 to 2007.

Mentions: Compared to the 30-year averages, weather conditions at our experimental site were unusually hot and wet and unusually cool and wet in the 2011 and 2012 growing seasons, respectively (Fig. 1).


Interactive effects of warming and increased precipitation on community structure and composition in an annual forb dominated desert steppe.

Hou Y, Zhou G, Xu Z, Liu T, Zhang X - PLoS ONE (2013)

Monthly average temperature (top) and total monthly precipitation (bottom) in the growing season.Gray bars indicate the regional monthly averages (mean ± SE) from 1978 to 2007.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3716769&req=5

pone-0070114-g001: Monthly average temperature (top) and total monthly precipitation (bottom) in the growing season.Gray bars indicate the regional monthly averages (mean ± SE) from 1978 to 2007.
Mentions: Compared to the 30-year averages, weather conditions at our experimental site were unusually hot and wet and unusually cool and wet in the 2011 and 2012 growing seasons, respectively (Fig. 1).

Bottom Line: Increased precipitation increased species richness while warming significantly decreased species richness, and their effects were additive rather than interactive.Although interannual variations in weather conditions may have a major affect on plant community composition on short term experiments, warming and precipitation treatments affected individual species and functional group composition.Warming caused C4 grasses such as Cleistogenes squarrosa to increase while increased precipitation caused the proportions of non-perennial C3 plants like Artemisia capillaris to decrease and perennial C4 plants to increase.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China.

ABSTRACT
To better understand how warming, increased precipitation and their interactions influence community structure and composition, a field experiment simulating hydrothermal interactions was conducted at an annual forb dominated desert steppe in northern China over 2 years. Increased precipitation increased species richness while warming significantly decreased species richness, and their effects were additive rather than interactive. Although interannual variations in weather conditions may have a major affect on plant community composition on short term experiments, warming and precipitation treatments affected individual species and functional group composition. Warming caused C4 grasses such as Cleistogenes squarrosa to increase while increased precipitation caused the proportions of non-perennial C3 plants like Artemisia capillaris to decrease and perennial C4 plants to increase.

Show MeSH