title: Response of two dominant boreal freshwater wetland plants to manipulated warming and altered precipitation.
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.
authors.affiliation: Key Lab of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China.
authors.forename: Yuanchun
authors.initials: Y
authors.lastname: Zou
authors.affiliation: Key Lab of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China.
authors.forename: Guoping
authors.initials: G
authors.lastname: Wang
authors.affiliation: Water Studies Centre and School of Chemistry, Monash University, Clayton, Australia.
authors.forename: Michael
authors.initials: M
authors.lastname: Grace
authors.affiliation: Key Lab of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China.
authors.forename: Xiaonan
authors.initials: X
authors.lastname: Lou
authors.affiliation: Key Lab of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Yu
authors.affiliation: Key Lab of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China.
authors.forename: Xianguo
authors.initials: X
authors.lastname: Lu
mesh_terms: D000064:Acclimatization; D002681:China; D002980:Climate; D057231:Climate Change; D006109:Poaceae / Q000254:growth & development* / Q000502:physiology; D011891:Rain; D013696:Temperature; D053833:Wetlands
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