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Response of two dominant boreal freshwater wetland plants to manipulated warming and altered precipitation.

Zou Y, Wang G, Grace M, Lou X, Yu X, Lu X - PLoS ONE (2014)

Bottom Line: Post-harvest, secondary growth of C. angustifolia was observed to explore intergenerational effects.The accumulated effect on aboveground biomass of post-harvest secondary growth of C. angustifolia was significant.These results explain the expansion of C. angustifolia during last 40 years and indicate the further expansion in natural boreal wetlands under a warmer and wetter future.

View Article: PubMed Central - PubMed

Affiliation: Key Lab of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China.

ABSTRACT
This study characterized the morphological and photosynthetic responses of two wetland plant species when they were subject to 2-6 °C fluctuations in growth temperature and ± 50% of precipitation, in order to predict the evolution of natural wetlands in Sanjiang Plain of North-eastern China. We investigated the morphological and photosynthetic responses of two dominant and competitive boreal freshwater wetland plants in Northeastern China to manipulation of warming (ambient, +2.0 °C, +4.0 °C, +6.0 °C) and altered precipitation (-50%, ambient, +50%) simultaneously by incubating the plants from seedling to senescence within climate-controlled environmental chambers. Post-harvest, secondary growth of C. angustifolia was observed to explore intergenerational effects. The results indicated that C. angustifolia demonstrated a greater acclimated capacity than G. spiculosa to respond to climate change due to higher resistance to temperature and precipitation manipulations. The accumulated effect on aboveground biomass of post-harvest secondary growth of C. angustifolia was significant. These results explain the expansion of C. angustifolia during last 40 years and indicate the further expansion in natural boreal wetlands under a warmer and wetter future. Stability of the natural surface water table is critical for the conservation and restoration of G. spiculosa populations reacting to encroachment stress from C. angustifolia expansion.

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Leaf area of C. angustifolia (A) and G. spiculosa (B) monthly.For each month, different letters over the bars indicate significant differences (p<0.05) between temperature manipulations for C. angustifolia and precipitation manipulations for G. spiculosa. The letters ‘a’ and ‘b’ are for the July results, ‘c’ and ‘d’ for the August results, and ‘e’ and ‘f’ for the September results. The error bars represent means ± 1 standard error.
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pone-0104454-g003: Leaf area of C. angustifolia (A) and G. spiculosa (B) monthly.For each month, different letters over the bars indicate significant differences (p<0.05) between temperature manipulations for C. angustifolia and precipitation manipulations for G. spiculosa. The letters ‘a’ and ‘b’ are for the July results, ‘c’ and ‘d’ for the August results, and ‘e’ and ‘f’ for the September results. The error bars represent means ± 1 standard error.

Mentions: The leaf area of the two species increased first and then decreased throughout the incubation. For C. angustifolia, the leaf area with the +6°C manipulation was smaller than other manipulations in July. There was no significant difference in leaf area between the ambient and the +2°C manipulation in July. In September, the leaf area with the +4°C manipulation was not significantly different from either the ambient or the +6°C manipulation. There was no significant difference in leaf area with different temperature manipulations in August (Fig. 3A). For G. spiculosa, there was no significant difference between ambient and the −50% precipitation treatments in any of the three months, while the leaf area with the 50% precipitation treatment was smaller than other treatments in August and September (Fig. 3B).


Response of two dominant boreal freshwater wetland plants to manipulated warming and altered precipitation.

Zou Y, Wang G, Grace M, Lou X, Yu X, Lu X - PLoS ONE (2014)

Leaf area of C. angustifolia (A) and G. spiculosa (B) monthly.For each month, different letters over the bars indicate significant differences (p<0.05) between temperature manipulations for C. angustifolia and precipitation manipulations for G. spiculosa. The letters ‘a’ and ‘b’ are for the July results, ‘c’ and ‘d’ for the August results, and ‘e’ and ‘f’ for the September results. The error bars represent means ± 1 standard error.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4126707&req=5

pone-0104454-g003: Leaf area of C. angustifolia (A) and G. spiculosa (B) monthly.For each month, different letters over the bars indicate significant differences (p<0.05) between temperature manipulations for C. angustifolia and precipitation manipulations for G. spiculosa. The letters ‘a’ and ‘b’ are for the July results, ‘c’ and ‘d’ for the August results, and ‘e’ and ‘f’ for the September results. The error bars represent means ± 1 standard error.
Mentions: The leaf area of the two species increased first and then decreased throughout the incubation. For C. angustifolia, the leaf area with the +6°C manipulation was smaller than other manipulations in July. There was no significant difference in leaf area between the ambient and the +2°C manipulation in July. In September, the leaf area with the +4°C manipulation was not significantly different from either the ambient or the +6°C manipulation. There was no significant difference in leaf area with different temperature manipulations in August (Fig. 3A). For G. spiculosa, there was no significant difference between ambient and the −50% precipitation treatments in any of the three months, while the leaf area with the 50% precipitation treatment was smaller than other treatments in August and September (Fig. 3B).

Bottom Line: Post-harvest, secondary growth of C. angustifolia was observed to explore intergenerational effects.The accumulated effect on aboveground biomass of post-harvest secondary growth of C. angustifolia was significant.These results explain the expansion of C. angustifolia during last 40 years and indicate the further expansion in natural boreal wetlands under a warmer and wetter future.

View Article: PubMed Central - PubMed

Affiliation: Key Lab of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China.

ABSTRACT
This study characterized the morphological and photosynthetic responses of two wetland plant species when they were subject to 2-6 °C fluctuations in growth temperature and ± 50% of precipitation, in order to predict the evolution of natural wetlands in Sanjiang Plain of North-eastern China. We investigated the morphological and photosynthetic responses of two dominant and competitive boreal freshwater wetland plants in Northeastern China to manipulation of warming (ambient, +2.0 °C, +4.0 °C, +6.0 °C) and altered precipitation (-50%, ambient, +50%) simultaneously by incubating the plants from seedling to senescence within climate-controlled environmental chambers. Post-harvest, secondary growth of C. angustifolia was observed to explore intergenerational effects. The results indicated that C. angustifolia demonstrated a greater acclimated capacity than G. spiculosa to respond to climate change due to higher resistance to temperature and precipitation manipulations. The accumulated effect on aboveground biomass of post-harvest secondary growth of C. angustifolia was significant. These results explain the expansion of C. angustifolia during last 40 years and indicate the further expansion in natural boreal wetlands under a warmer and wetter future. Stability of the natural surface water table is critical for the conservation and restoration of G. spiculosa populations reacting to encroachment stress from C. angustifolia expansion.

Show MeSH
Related in: MedlinePlus