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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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Aboveground biomass of C. angustifolia after secondary growth for one month.Different letters shared by the bars indicate significant differences (p<0.05) between the temperature manipulations. The error bars represent means ± 1 standard error.
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pone-0104454-g007: Aboveground biomass of C. angustifolia after secondary growth for one month.Different letters shared by the bars indicate significant differences (p<0.05) between the temperature manipulations. The error bars represent means ± 1 standard error.

Mentions: One-way ANOVA results (Table 4) showed that only above-ground biomass displayed a significant difference with the incubation temperature treatment after one month's secondary growth (F = 4.096, p = 0.049); no other morphological or photosynthetic indicator showed significant differences (Table 4). Above-ground biomass of secondary growth was greatest in the +4°C manipulation, 1.11 times higher than the ambient temperature (Fig. 7).


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)

Aboveground biomass of C. angustifolia after secondary growth for one month.Different letters shared by the bars indicate significant differences (p<0.05) between the temperature manipulations. 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-g007: Aboveground biomass of C. angustifolia after secondary growth for one month.Different letters shared by the bars indicate significant differences (p<0.05) between the temperature manipulations. The error bars represent means ± 1 standard error.
Mentions: One-way ANOVA results (Table 4) showed that only above-ground biomass displayed a significant difference with the incubation temperature treatment after one month's secondary growth (F = 4.096, p = 0.049); no other morphological or photosynthetic indicator showed significant differences (Table 4). Above-ground biomass of secondary growth was greatest in the +4°C manipulation, 1.11 times higher than the ambient temperature (Fig. 7).

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