Rapid Invasion of Spartina Alterniflora in the Coastal Zone of Mainland China: Spatiotemporal Patterns and Human Prevention

Mao, Dehua; Liu, Mingyue; Wang, Zongming; Li, Lin; Man, Weidong; Jia, Mingming; Zhang, Yuanzhi

doi:10.3390/s19102308

Cited by 102 publications

(64 citation statements)

References 33 publications

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“…So it is possible that environmental changes over a large scale, rather than genetic differentiation, affect population demographical characteristics (Bernik et al, 2016). Similarly, recent studies also revealed rapid invasion rate of S. alterniflora in Coastal China (Mao et al, 2019), but its conclusion that Jiangsu Province had the largest expansion with an invasive rate of 715 ha/yr, followed by Zhejiang during the period of 1990-2015 is inconsistent with our findings. The difference of two calculating methods on annual expansion rate might mainly contribute to variable results.…”

Section: Variation In the Expansion Rate Along Latitudinal Gradientcontrasting

confidence: 99%

Geographical Variation and Influencing Factors of Spartina alterniflora Expansion Rate in Coastal China

Liu

Chang

et al. 2020

Chin. Geogr. Sci.

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Biological invasion poses a huge threat to ecological security. Spartina alterniflora was introduced into China in 1979, and its arrival corresponded with negative effects on native ecosystems. To explore geographical variation of its expansion rate in coastal China, we selected 43 S. alterniflora sites from Tianjin Coastal New Area to Beihai. The area expansion rate, expansion rate paralleling and vertical to the shoreline were analysed based on Landsat images and field survey in 2015. Simple Ocean Data Assimilation (SODA) and climate data were collected to statistically analyse the influential factors of expansion rate. Results showed that significant difference of S. alterniflora area expansion rate among different latitude zones (P < 0.01), increasing from 6.08% at southern (21°N-23°N) to 19.87% in Bohai Bay (37°N-39°N) along latitude gradient. There was a significant difference in expansion rate vertical to shoreline in different latitude zones (P < 0.01) with the largest occurring in Bohai Bay (256 m/yr, 37°N-39°N), and showed an decreasing tendency gradually from north to south. No significant difference and latitudinal clines in expansion rate paralleling to shoreline were observed. Expansion rate had significant negative correlation with mean seawater temperature, the lowest seawater temperature, current zonal velocity and meridional velocity and presented a reducing trend as these biotic factors increased; however, they were not significantly correlated with the highest seawater temperature and mean seawater salinity. We identified significant correlations between expansion rate and annual mean temperature, the lowest temperature in January and annual precipitation, but there was little correlation with annual diurnal difference in temperature and the highest temperature in July. The rapid expansion rate in high-latitude China demonstrated a higher risk of potential invasion in the north; dynamic monitoring and control management should be established as soon as possible.

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Section: Variation In the Expansion Rate Along Latitudinal Gradientcontrasting

confidence: 99%

Geographical Variation and Influencing Factors of Spartina alterniflora Expansion Rate in Coastal China

Liu

Chang

et al. 2020

Chin. Geogr. Sci.

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“…Therefore, results for S. alterniflora in the same year vary among studies, as do S. alterniflora mapping results in the same year. Lu et al [1], Liu et al [32] and Mao et al [33] monitored S. alterniflora in China, but their results differed because of the study differences in the types of data acquired and in the study periods. It is difficult to say whose research results are more accurate because S. alterniflora has been changing dynamically and lacks reliable historical monitoring data.…”

Section: Uncertainty In Monitoring S Alterniflora Invasion Based On mentioning

confidence: 99%

Monitoring of the invasion of Spartina alterniflora from 1985 to 2015 in Zhejiang Province, China

Li²,

Zhang

et al. 2020

BMC Ecol

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Background: Spartina alterniflora is an invasive plant on the coast of China that replaces native vegetation and has a serious negative impact on local ecosystems. Monitoring the spatial distribution of S. alterniflora and its changes over time can reveal its expansion mechanism, which is crucial for the management of coastal ecosystems. The purpose of this study was to map the distribution of S. alterniflora in Zhejiang Province from 1985 to 2015 using a time series of Landsat TM/OLI images and analyze the temporal and spatial patterns of expansion of this species. Results: After analyzing the distribution of coastal vegetation, the vegetation index was calculated based on Landsat images for 4 years (1985, 1995, 2005 and 2015). According to a threshold determined based on expert knowledge, the distribution of S. alterniflora in Zhejiang Province was extracted, and the temporal and spatial changes in the distribution of S. alterniflora were analyzed. The classification accuracy was 90.3%. S. alterniflora has expanded rapidly in recent decades after being introduced into southern Zhejiang. Between 1985 and 2015, S. alterniflora increased its area of distribution by 10,000 hm 2 , and it replaced native vegetation to become the most abundant halophyte in tidal flats. Overall, S. alterniflora expanded from south to north over the decades of the study, and the fastest expansion rate was 463.64 hm 2 /year, which occurred between 1995 and 2005. S. alterniflora was widely distributed in the tidal flats of bays and estuaries and expanded outward as sediment accumulated. Conclusions: This study reveals the changes over time in S. alterniflora cover in Zhejiang and can contribute to the control and management of this invasive plant.

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“…In recent years, some field and imagery evidence has been reported that the invasion of S. alterniflora followed the tidal channel networks as the main S. alterniflora is a perennial rhizomatous grass native to the Gulf and Atlantic coasts of North America. It was originally introduced to East China in 1979 for beach protection and enhancing sedimentation, and nowadays has aggressively invaded a wide expanse of Chinese shoreline [37,38]. As such, S. alterniflora was listed as one of the 16 invasive species by the Environmental Protection Bureau of China in 2003.…”

Section: Study Areamentioning

confidence: 99%

How Does Spartina alterniflora Invade in Salt Marsh in Relation to Tidal Channel Networks? Patterns and Processes

et al. 2020

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Rapid invasion of Spartina alterniflora in coastal wetlands throughout the world has attracted much attention. Some field and imagery evidence has shown that the landward invasion of S. alterniflora follows the tidal channel networks as the main pathway. However, the specific patterns and processes of its invasion in salt marshes in relation to tidal channel networks are still unclear. Based on yearly satellite images from 2010 to 2018, we studied the patterning relationship between tidal channel networks and the invasion of S. alterniflora at the south bank of the Yellow River Estuary (SBYRE). At the landscape (watershed and cross-watershed) scale, we analyzed the correlation between proxies of tidal channel network drainage efficiency (unchanneled flow lengths (UFL), overmarsh path length (OPL), and tidal channels density (TCD)) and spatial distribution of S. alterniflora. At the local (channel) scale, we examined the area and number of patches of S. alterniflora in different distance buffer zones outward from the tidal channels. Our results showed that, overall, the invasion of S. alterniflora had a strong association with tidal channel networks. Watershed with higher drainage efficiency (smaller OPL) attained larger S. alterniflora area, and higher-order (third-order and above) channels tended to be the main pathway of S. alterniflora invasion. At the local scale, the total area of S. alterniflora in each distance buffer zones increased with distance within 15 m from the tidal channels, whereas the number of patches decreased with distance as expansion stabilized. Overall, the S. alterniflora area within 30 m from the tidal channels remained approximately 14% of its entire distribution throughout the invasion. The results implicated that early control of S. alterniflora invasion should pay close attention to higher-order tidal channels as the main pathway

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Rapid Invasion of Spartina Alterniflora in the Coastal Zone of Mainland China: Spatiotemporal Patterns and Human Prevention

Cited by 102 publications

References 33 publications

Geographical Variation and Influencing Factors of Spartina alterniflora Expansion Rate in Coastal China

Geographical Variation and Influencing Factors of Spartina alterniflora Expansion Rate in Coastal China

Monitoring of the invasion of Spartina alterniflora from 1985 to 2015 in Zhejiang Province, China

How Does Spartina alterniflora Invade in Salt Marsh in Relation to Tidal Channel Networks? Patterns and Processes

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