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Article

Rapid Invasion of Spartina alterniflora in the Coastal Zone of Mainland China: New Observations from Landsat OLI Images

1
Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
2
College of Mining Engineering, North China University of Science and Technology, Tangshan 063210, China
3
Department of Earth Sciences, Indiana University-Purdue University, Indianapolis, IN 46202, USA
4
Chinese University of Hong Kong, Center for Housing Innovations, Shatin, New Territories, Hong Kong, China
5
Chinese Academy of Sciences, Key Lab of Lunar Science and Deep-exploration, National Astronomical Observatories, Beijing 100101, China
*
Authors to whom correspondence should be addressed.
Remote Sens. 2018, 10(12), 1933; https://doi.org/10.3390/rs10121933
Received: 1 November 2018 / Revised: 23 November 2018 / Accepted: 28 November 2018 / Published: 1 December 2018
Plant invasion imposes significant threats to biodiversity and ecosystem function. Thus, monitoring the spatial pattern of invasive plants is vital for effective ecosystem management. Spartina alterniflora (S. alterniflora) has been one of the most prevalent invasive plants along the China coast, and its spread has had severe ecological consequences. Here, we provide new observation from Landsat operational land imager (OLI) images. Specifically, 43 Landsat-8 OLI images from 2014 to 2016, a combination of object-based image analysis (OBIA) and support vector machine (SVM) methods, and field surveys covering the whole coast were used to construct an up-to-date dataset for 2015 and investigate the spatial variability of S. alterniflora in the coastal zone of mainland China. The classification results achieved good estimation, with a kappa coefficient of 0.86 and 96% overall accuracy. Our results revealed that there was approximately 545.80 km2 of S. alterniflora distributed in the coastal zone of mainland China in 2015, from Hebei to Guangxi provinces. Nearly 92% of the total area of S. alterniflora was distributed within four provinces: Jiangsu, Shanghai, Zhejiang, and Fujian. Seven national nature reserves invaded by S. alterniflora encompassed approximately one-third (174.35 km2) of the total area of S. alterniflora over mainland China. The Yancheng National Nature Reserve exhibited the largest area of S. alterniflora (115.62 km2) among the reserves. Given the rapid and extensive expansion of S. alterniflora in the 40 years since its introduction and its various ecological effects, geospatially varied responding decisions are needed to promote sustainable coastal ecosystems. View Full-Text
Keywords: invasive plants; Spartina alterniflora; CAS S. alterniflora; object-based image analysis; Landsat OLI invasive plants; Spartina alterniflora; CAS S. alterniflora; object-based image analysis; Landsat OLI
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MDPI and ACS Style

Liu, M.; Mao, D.; Wang, Z.; Li, L.; Man, W.; Jia, M.; Ren, C.; Zhang, Y. Rapid Invasion of Spartina alterniflora in the Coastal Zone of Mainland China: New Observations from Landsat OLI Images. Remote Sens. 2018, 10, 1933. https://doi.org/10.3390/rs10121933

AMA Style

Liu M, Mao D, Wang Z, Li L, Man W, Jia M, Ren C, Zhang Y. Rapid Invasion of Spartina alterniflora in the Coastal Zone of Mainland China: New Observations from Landsat OLI Images. Remote Sensing. 2018; 10(12):1933. https://doi.org/10.3390/rs10121933

Chicago/Turabian Style

Liu, Mingyue, Dehua Mao, Zongming Wang, Lin Li, Weidong Man, Mingming Jia, Chunying Ren, and Yuanzhi Zhang. 2018. "Rapid Invasion of Spartina alterniflora in the Coastal Zone of Mainland China: New Observations from Landsat OLI Images" Remote Sensing 10, no. 12: 1933. https://doi.org/10.3390/rs10121933

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