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

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 inve...

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Bibliographic Details
Published in:	PloS one 2014-08, Vol.9 (8), p.e104454
Main Authors:	Zou, Yuanchun, Wang, Guoping, Grace, Michael, Lou, Xiaonan, Yu, Xiaofei, Lu, Xianguo
Format:	Article
Language:	eng
Subjects:	Acclimatization Biology and Life Sciences Calamagrostis angustifolia Carbon China Climate Climate Change Conservation Earth Sciences Ecology Ecology and Environmental Sciences Ecosystems Encroachment Environmental chambers Expansion Flowers & plants Glyceria Habitats Laboratories Morphology Nitrogen Photosynthesis Physiology Plant species Poaceae - growth & development Poaceae - physiology Precipitation Rain Rainfall Restoration Seedlings Senescence Studies Surface stability Surface water Temperature Temperature effects Test chambers Variation Water table Wetlands
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Summary:	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.
ISSN:	1932-6203 1932-6203