Nutrients Have a Different Impact on the Salt Tolerance of Two Coexisting Suaeda Species in the Yellow River Delta
- PDF / 1,509,250 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 30 Downloads / 240 Views
DEGRADATION AND ECOLOGICAL RESTORATION OF ESTUARINE WETLANDS IN CHINA
Nutrients Have a Different Impact on the Salt Tolerance of Two Coexisting Suaeda Species in the Yellow River Delta Qi-Hui Zhang 1,2,3 & Kulihong Sairebieli 1,2,3 & Ming-Ming Zhao 1,2,3 & Xiao-Han Sun 1,2,3 & Wei Wang 4 & Xiao-Na Yu 1,2,3 & Ning Du 1,2,3 & Wei-Hua Guo 1,2,3 Received: 22 April 2020 / Accepted: 13 September 2020 # Society of Wetland Scientists 2020
Abstract Suaeda species are widely distributed in the coastal areas and are commonly selected as candidates for coastal saline–alkaline soil restoration. In this study, a pot experiment was carried out to investigate the effects of different nutrient levels and salt stresses on the growth and physiological characteristics of Suaeda salsa and Suaeda glauca, two coexisting species exhibiting a spatial segregation in the Yellow River Delta (YRD), China. Our results showed that both Suaeda species can adapt to a high salinity environment (21 g kg−1 NaCl) and display similar regulation strategies, including increased shoot–root ratio, maintaining leaf succulence, and relying on proline and metal ions as osmotic regulators. However, nutrients had a different impact on the salt tolerance of the two species. Under low soil salinity levels, nutrient addition was more beneficial for S. salsa, while under high soil salinity levels, nutrient addition was more beneficial for S. glauca. Our results reveal that the spatial segregation of the two Suaeda species was not driven by salinity. Both species can be used in coastal restoration projects for their high salt-tolerant abilities, but the nutrient addition management should be specific to the species and site soil levels. Keywords Salt stress . Nutrition . Suaeda salsa . Suaeda glauca . Spatial distribution . Wetlands
Introduction Coastal wetlands, which are located in the transitional zones between the terrestrial ecosystem and the marine ecosystem, are one of the most important wetland types, valued for their ecological services as well as their ability to maintain and stabilize coastal ecosystems (Barbier et al. 2011; Sannigrahi
* Ning Du [email protected] * Wei-Hua Guo [email protected] 1
Institute of Ecology and Biodiversity, School of Life Sciences, Shandong University, 72 Binhai Road, Qingdao 266237, China
2
Shandong Provincial Engineering and Technology Research Center for Vegetation Ecology, Shandong University, 72 Binhai Road, Qingdao 266237, China
3
Qingdao Forest Ecology Research Station of National Forestry and Grassland Administration, Shandong University, 72 Binhai Road, Qingdao 266237, China
4
First Institute of Oceanography, Ministry of Natural Resource, 6 Xianxialing Road, Qingdao 266061, China
et al. 2019). However, coastal ecosystems are fragile, vulnerable, and heavily threatened by sea-level rise, and changing climate, as well as anthropogenic activities (White and Kaplan 2017; Wu et al. 2018; Andres et al. 2019). Worldwide losses of coastal ecosystems have accelerated in recent decades, along with environmental dete
Data Loading...
