The influence of environmental factors on the settlement of <i>Spartina alterniflora</i> on tidal flats

ZHU Xiao-jing; YUAN Lin; ZHAO Zhi-yuan; ZHANG Li-quan; LI Wei; WEI Wei; PAN Jia-lin; CHEN Ya-hui

doi:10.3969/j.issn.1000-5641.2019.06.014

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Dec. 2019

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Article Navigation > Journal of East China Normal University (Natural Sciences) > 2019 > (6): 140-152

ZHU Xiao-jing, YUAN Lin, ZHAO Zhi-yuan, ZHANG Li-quan, LI Wei, WEI Wei, PAN Jia-lin, CHEN Ya-hui. The influence of environmental factors on the settlement of Spartina alterniflora on tidal flats[J]. Journal of East China Normal University (Natural Sciences), 2019, (6): 140-152. doi: 10.3969/j.issn.1000-5641.2019.06.014

Citation:

ZHU Xiao-jing, YUAN Lin, ZHAO Zhi-yuan, ZHANG Li-quan, LI Wei, WEI Wei, PAN Jia-lin, CHEN Ya-hui. The influence of environmental factors on the settlement of Spartina alterniflora on tidal flats[J]. Journal of East China Normal University (Natural Sciences), 2019, (6): 140-152. doi: 10.3969/j.issn.1000-5641.2019.06.014

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The influence of environmental factors on the settlement of Spartina alterniflora on tidal flats

doi: 10.3969/j.issn.1000-5641.2019.06.014

1.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
2.
Institute of Eco-Chongming, East China Normal University, Shanghai 200241, China

Received Date: 2018-09-14
Publish Date: 2019-11-25

Abstract

Abstract

The invasion of the exotic plant Spartina alterniflora has caused a series of ecological risks to coastal wetland ecosystems. In order to study the influence of environmental factors on the invasion of S. alterniflora, S. alterniflora rhizomes were transplanted from land to sea on two types of tidal flats (sandy and silty)in Nanhui Dongtan, Shanghai. We monitored environmental factors such as elevation, hydrodynamic conditions, sediment characteristics, and survival rates of S. alterniflora simultaneously. Redundancy Analysis (RDA) was used to analyze the dominant factors on the settlement of S.alterniflora. The results showed that:(1) The critical shear stress, median diameter, elevation, and maximum flow velocity had dominant effects on the settlement of S.alterniflora rhizome (P < 0.05). (2) The dominant environmental factors that affected S.alterniflora settlement were different on each of the tidal flat types. On the sandy flat (northern), elevation and median diameter were the dominant factors affecting S.alterniflora settlement (P < 0.05). The survival rate of S.alterniflora increased with an increase in elevation and with a decrease in sediment median diameter. On the silty flat (southern), critical shear stress was the dominant factor for the settlement of S.alterniflora (P < 0.05), and there was a positive correlation between critical shear stress and the survival rate of S.alterniflora. The results of the study have theoretical value and significance in guiding mechanism research, prevention, and control of S.alterniflora invasion.
- Spartina alterniflora,
- rhizome shoots,
- invasion,
- tidal flat,
- critical shear stress

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References(44)

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