Limits...
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.

Show MeSH

Related in: MedlinePlus

Aboveground biomass (A), leaf total nitrogen (B) of C. angustifolia, and aboveground biomass of G. spiculosa (C, D) after harvest.Different letters shared by the bars indicate significant differences (p<0.05) between temperature or precipitation manipulations. The error bars represent means ± 1 standard error.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4126707&req=5

pone-0104454-g006: Aboveground biomass (A), leaf total nitrogen (B) of C. angustifolia, and aboveground biomass of G. spiculosa (C, D) after harvest.Different letters shared by the bars indicate significant differences (p<0.05) between temperature or precipitation manipulations. The error bars represent means ± 1 standard error.

Mentions: Above-ground biomass of C. angustifolia was only significantly affected by temperature (F = 4.512, p = 0.012), while the effect of precipitation and the interaction effect were insignificant (Table 3). Biomass was at a maximum in the +4°C manipulation, increasing by 58% above that at ambient temperature (Fig. 6A). Leaf total nitrogen of C. angustifolia was also only significantly affected by temperature (F = 7.125, p = 0.001; Table 3). All three temperature increments resulted in statistically significant increases above ambient temperature, with a maximum value at +6°C, representing a 39% increase above ambient temperature (Fig. 6B).


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 (A), leaf total nitrogen (B) of C. angustifolia, and aboveground biomass of G. spiculosa (C, D) after harvest.Different letters shared by the bars indicate significant differences (p<0.05) between temperature or precipitation 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-g006: Aboveground biomass (A), leaf total nitrogen (B) of C. angustifolia, and aboveground biomass of G. spiculosa (C, D) after harvest.Different letters shared by the bars indicate significant differences (p<0.05) between temperature or precipitation manipulations. The error bars represent means ± 1 standard error.
Mentions: Above-ground biomass of C. angustifolia was only significantly affected by temperature (F = 4.512, p = 0.012), while the effect of precipitation and the interaction effect were insignificant (Table 3). Biomass was at a maximum in the +4°C manipulation, increasing by 58% above that at ambient temperature (Fig. 6A). Leaf total nitrogen of C. angustifolia was also only significantly affected by temperature (F = 7.125, p = 0.001; Table 3). All three temperature increments resulted in statistically significant increases above ambient temperature, with a maximum value at +6°C, representing a 39% increase above ambient temperature (Fig. 6B).

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