RSEI or MRSEI? Comment on Jia et al. Evaluation of Eco-Environmental Quality in Qaidam Basin Based on the Ecological Index (MRSEI) and GEE. <i>Remote Sens.</i> 2021, <i>13</i>, 4543
Recently, Jia et al. employed the index, modified remote sensing ecological index (MRSEI), to evaluate the ecological quality of the Qaidam Basin, China. The MRSEI made a modification to the previous remote sensing-based ecological index (RSEI), which is a frequently used remote sensing technique fo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/21/5307 |
| _version_ | 1797466600878637056 |
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| author | Hanqiu Xu Weifang Duan Wenhui Deng Mengjing Lin |
| author_facet | Hanqiu Xu Weifang Duan Wenhui Deng Mengjing Lin |
| author_sort | Hanqiu Xu |
| collection | DOAJ |
| description | Recently, Jia et al. employed the index, modified remote sensing ecological index (MRSEI), to evaluate the ecological quality of the Qaidam Basin, China. The MRSEI made a modification to the previous remote sensing-based ecological index (RSEI), which is a frequently used remote sensing technique for evaluating regional ecological status. Based on the investigation of the ecological implications of the three principal components (PCs) derived from the principal component analysis (PCA) and the case study of the Qaidam Basin, this comment analyzed the rationality of the modification made to RSEI by MRSEI and compared MRSEI with RSEI. The analysis of the three PCs shows that the first principal component (PC1) has clear ecological implications, whereas the second principal component (PC2) and the third principal component (PC3) have not. Therefore, RSEI can only be constructed with PC1. However, MRSEI unreasonably added PC2 and PC3 into PC1 to construct the index. This resulted in the interference of each principal component. The addition also significantly reduced the weight of PC1 in the computation of MRSEI. The comparison results show that MRSEI does not improve RSEI, but causes the overestimation of the ecological quality of the Qaidam Basin. Therefore, the modification made by MRSEI is questionable and MRSEI is not recommended to be used for regional ecological quality evaluation. |
| first_indexed | 2024-03-09T18:42:04Z |
| format | Article |
| id | doaj.art-6cf477377f7c4a19a569ad3b1ff50a47 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T18:42:04Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-6cf477377f7c4a19a569ad3b1ff50a472023-11-24T06:36:55ZengMDPI AGRemote Sensing2072-42922022-10-011421530710.3390/rs14215307RSEI or MRSEI? Comment on Jia et al. Evaluation of Eco-Environmental Quality in Qaidam Basin Based on the Ecological Index (MRSEI) and GEE. <i>Remote Sens.</i> 2021, <i>13</i>, 4543Hanqiu Xu0Weifang Duan1Wenhui Deng2Mengjing Lin3College of Environment and Safety Engineering, Institute of Remote Sensing Information Engineering, Fuzhou University, Fuzhou 350116, ChinaCollege of Environment and Safety Engineering, Institute of Remote Sensing Information Engineering, Fuzhou University, Fuzhou 350116, ChinaCollege of Environment and Safety Engineering, Institute of Remote Sensing Information Engineering, Fuzhou University, Fuzhou 350116, ChinaInstitute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, ChinaRecently, Jia et al. employed the index, modified remote sensing ecological index (MRSEI), to evaluate the ecological quality of the Qaidam Basin, China. The MRSEI made a modification to the previous remote sensing-based ecological index (RSEI), which is a frequently used remote sensing technique for evaluating regional ecological status. Based on the investigation of the ecological implications of the three principal components (PCs) derived from the principal component analysis (PCA) and the case study of the Qaidam Basin, this comment analyzed the rationality of the modification made to RSEI by MRSEI and compared MRSEI with RSEI. The analysis of the three PCs shows that the first principal component (PC1) has clear ecological implications, whereas the second principal component (PC2) and the third principal component (PC3) have not. Therefore, RSEI can only be constructed with PC1. However, MRSEI unreasonably added PC2 and PC3 into PC1 to construct the index. This resulted in the interference of each principal component. The addition also significantly reduced the weight of PC1 in the computation of MRSEI. The comparison results show that MRSEI does not improve RSEI, but causes the overestimation of the ecological quality of the Qaidam Basin. Therefore, the modification made by MRSEI is questionable and MRSEI is not recommended to be used for regional ecological quality evaluation.https://www.mdpi.com/2072-4292/14/21/5307RSEIMRSEIprincipal components analysis (PCA) |
| spellingShingle | Hanqiu Xu Weifang Duan Wenhui Deng Mengjing Lin RSEI or MRSEI? Comment on Jia et al. Evaluation of Eco-Environmental Quality in Qaidam Basin Based on the Ecological Index (MRSEI) and GEE. <i>Remote Sens.</i> 2021, <i>13</i>, 4543 Remote Sensing RSEI MRSEI principal components analysis (PCA) |
| title | RSEI or MRSEI? Comment on Jia et al. Evaluation of Eco-Environmental Quality in Qaidam Basin Based on the Ecological Index (MRSEI) and GEE. <i>Remote Sens.</i> 2021, <i>13</i>, 4543 |
| title_full | RSEI or MRSEI? Comment on Jia et al. Evaluation of Eco-Environmental Quality in Qaidam Basin Based on the Ecological Index (MRSEI) and GEE. <i>Remote Sens.</i> 2021, <i>13</i>, 4543 |
| title_fullStr | RSEI or MRSEI? Comment on Jia et al. Evaluation of Eco-Environmental Quality in Qaidam Basin Based on the Ecological Index (MRSEI) and GEE. <i>Remote Sens.</i> 2021, <i>13</i>, 4543 |
| title_full_unstemmed | RSEI or MRSEI? Comment on Jia et al. Evaluation of Eco-Environmental Quality in Qaidam Basin Based on the Ecological Index (MRSEI) and GEE. <i>Remote Sens.</i> 2021, <i>13</i>, 4543 |
| title_short | RSEI or MRSEI? Comment on Jia et al. Evaluation of Eco-Environmental Quality in Qaidam Basin Based on the Ecological Index (MRSEI) and GEE. <i>Remote Sens.</i> 2021, <i>13</i>, 4543 |
| title_sort | rsei or mrsei comment on jia et al evaluation of eco environmental quality in qaidam basin based on the ecological index mrsei and gee i remote sens i 2021 i 13 i 4543 |
| topic | RSEI MRSEI principal components analysis (PCA) |
| url | https://www.mdpi.com/2072-4292/14/21/5307 |
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