Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/153883
Title: Spatiotemporal changes in mulberry-dyke-fish ponds in the Guangdong-Hong Kong-Macao Greater Bay Area over the past 40 years
Authors: Zhang, Wenxin
Cheng, Wenxin
Qiu, Junliang
Park, Edward
Ran, Lishan
Xie, Xuetong
Yang, Xiankun
Keywords: Science::Geology
Issue Date: 2021
Source: Zhang, W., Cheng, W., Qiu, J., Park, E., Ran, L., Xie, X. & Yang, X. (2021). Spatiotemporal changes in mulberry-dyke-fish ponds in the Guangdong-Hong Kong-Macao Greater Bay Area over the past 40 years. Water, 13(21), 2953-. https://dx.doi.org/10.3390/w13212953
Journal: Water 
Abstract: Mulberry-dyke-fish pond ecosystems are a representative traditional eco-agriculture in the Guangdong–Hong Kong–Macao Greater Bay Area (GBA). Investigations about the changes in the systems and their relevant water environments under the background of rapid urbanization can provide valuable information to formulate sustainable protection and development strategies. Using the Landsat images obtained after 1986, this study combined supervised classification and visual interpretation approaches, as well as water intensity index and synthesized index to identify the spatial patterns of changes in the ponds in the GBA over the past 40 years. The results indicated that during the period 1986–2013, the total surface area of the ponds in the GBA increased significantly and peaked in 2013 with a total increase of 84.63%; After that, the total surface area showed a downward trend with a total decrease of approximately 31.34%. The year of 2013 was identified as the milestone of the changes. The results proved that human activities have continuously influenced the spatial distribution and size of fish ponds in the past 40 years. The fish ponds had transformed from near-natural ponds with different sizes and a near-natural random distribution in the early stage into an artificial distribution and an artificial shape. Land use changes, industrial transfer, Government guidance and financial motives were the major drivers to the changes. If no effective measures are taken, this shrinking trend in the ponds will remain in the future.
URI: https://hdl.handle.net/10356/153883
ISSN: 2073-4441
DOI: 10.3390/w13212953
Rights: © 2021 The Author(s). Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ASE Journal Articles
EOS Journal Articles

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