No Fertile Island Effects or Salt Island Effects of Tamarix chinensis on Understory Herbaceous Communities Were Found in
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DEGRADATION AND ECOLOGICAL RESTORATION OF ESTUARINE WETLANDS IN CHINA
No Fertile Island Effects or Salt Island Effects of Tamarix chinensis on Understory Herbaceous Communities Were Found in the Coastal Area of Laizhou Bay, China Dayou Zhou 1,2 & Weihua Guo 1,2 & Mingyan Li 3 & Franziska Eller 4 & Cheyu Zhang 1,2 & Pan Wu 1,2 & Shijie Yi 1,2 & Shuren Yang 1,2 & Ning Du 1,2 & Xiaona Yu 1,2 & Xiao Guo 3 Received: 29 February 2020 / Accepted: 15 May 2020 # Society of Wetland Scientists 2020
Abstract Tamarix chinensis is a dominant species in both the Yellow River Delta Natural Reserve and Changyi National Marine Specific Protection Area, Laizhou Bay, China, and plays an important role in wetland ecosystems. We investigated the relationship between T. chinensis and environmental factors, and the influences of T. chinensis on understory plants. We selected four T. chinensis communities with different hydrologic conditions and salinities in the Yellow River Delta Natural Reserve and the Changyi National Marine Specific Protection Area. The results showed that the growth of T. chinensis was negatively correlated with soil salinity. Generally no fertile island effects or salt island effects of T. chinensis on herbaceous plant communities were found in the coastal area of Laizhou Bay, China. In areas with high salinity, T. chinensis provided nursery effects for understory herbaceous species, increasing species diversity and enhancing plant growth. In low-salinity environments, T. chinensis appeared to restrain the growth of understory plants. This study observed different influences of T. chinensis on herbaceous species between the Yellow River Delta Natural Reserve and Changyi National Marine Specific Protection Area, providing scientific basis and theoretical foundation for investigating plant distribution and ecological community succession in Laizhou Bay, China. Keywords Biodiversity . Laizhou Bay . Nursery effects . Salinity . Tamarix chinensis . Yellow River Delta
Abbreviations N Nitrogen P Phosphorous YRD Yellow River Delta CY Changyi Ecological Special Protection Zone
EC RII
Electrical Conductivity Relative Interaction Intensity
Introduction * Xiao Guo [email protected] 1
Institute of Ecology and Biodiversity, School of Life Sciences, Shandong University, 72 Binhai Road, Qingdao 266237, People’s Republic of China
2
Shandong Provincial Engineering and Technology Research Center for Vegetation Ecology, Shandong University, 72 Binhai Road, Qingdao 266237, People’s Republic of China
3
College of Landscape Architecture and Forestry, Qingdao Agricultural University, Qingdao 266109, People’s Republic of China
4
Department of Bioscience, Plant Biology, Aarhus University, Ole Worms Alle 1, DK-8000 Aarhus, C, Denmark
The effects of woody plants on neighboring herbs are an important topic in plant species interaction studies (Tewksbury and Lloyd 2001; Du et al. 2017). In the areas where resources are limited, woody canopy plants can promote the colonization and growth of understory plants, particularly in stre
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