Comparison of indirect ordination methods for analysis of the vegetation (Case study: Urmia airport plantation)
This study aimed at investigating a range of widely-used approaches for indirect ordination analysis of vegetation. To this aim, a black pine (Pinus nigra Arnold.) plantation (9.2 ha) located at Urmia airport was studied. Nine plots of 100 m2 each were randomly set up in 50×50 m sampling grid, in wh...
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| Format: | Article |
| Language: | fas |
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Research Institute of Forests and Rangelands of Iran
2015-12-01
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| Series: | تحقیقات جنگل و صنوبر ایران |
| Subjects: | |
| Online Access: | http://ijfpr.areeo.ac.ir/article_106585_d0a239ae38c713f6890593d7fee8ce8e.pdf |
| _version_ | 1819067982549090304 |
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| author | Javad Eshaghi Rad Naqme Pakgohar Abbas Banj Shafei Seyyed Jalil Alavi |
| author_facet | Javad Eshaghi Rad Naqme Pakgohar Abbas Banj Shafei Seyyed Jalil Alavi |
| author_sort | Javad Eshaghi Rad |
| collection | DOAJ |
| description | This study aimed at investigating a range of widely-used approaches for indirect ordination analysis of vegetation. To this aim, a black pine (Pinus nigra Arnold.) plantation (9.2 ha) located at Urmia airport was studied. Nine plots of 100 m2 each were randomly set up in 50×50 m sampling grid, in which vegetation was recorded. In addition, three plots of 100 m2 with 50 meters interval were set up along transect in an adjacent meadow site as control area. We evaluated three ordination techniques (Principal Component Analysis, Detrended Correspondence Analysis, Non-Metric Multidimensional Scaling) with varying values of gradient length, Kaiser-Guttman, Broken stick, 70% of variance, eigenvalues > 0.4, final stress in NMDS ordination and Procrustean analysis. Result showed that all three ordinations are able to illustrate length of environmental gradient, though Procrustean analysis of all three datasets revealed significant differences in correlation between ordination methods. DCA had eigenvalues > 4.0, and the covered Kaiser-Guttman criterion with an axis. Moreover, final stress was < 10 in NMDS ordination, yet PCA covered Kaiser-Guttman and broken stick criteria at three axes. In conclusion, the most appropriate ordination methods across our test site included DCA and NMDS. |
| first_indexed | 2024-12-21T16:26:54Z |
| format | Article |
| id | doaj.art-0cfda5f0939644da951e5888f596d7b7 |
| institution | Directory Open Access Journal |
| issn | 1735-0883 2383-1146 |
| language | fas |
| last_indexed | 2024-12-21T16:26:54Z |
| publishDate | 2015-12-01 |
| publisher | Research Institute of Forests and Rangelands of Iran |
| record_format | Article |
| series | تحقیقات جنگل و صنوبر ایران |
| spelling | doaj.art-0cfda5f0939644da951e5888f596d7b72022-12-21T18:57:25ZfasResearch Institute of Forests and Rangelands of Iranتحقیقات جنگل و صنوبر ایران1735-08832383-11462015-12-0123463764610.22092/ijfpr.2015.106585106585Comparison of indirect ordination methods for analysis of the vegetation (Case study: Urmia airport plantation)Javad Eshaghi Rad0Naqme Pakgohar1Abbas Banj Shafei2Seyyed Jalil Alavi3associations in Baharbon district of Kheyroud Associate Prof., Department of Forestry, Faculty of Natural Resources, Urmia UniversityM.Sc. Forestry, Department of Forestry, Faculty of Natural Resources, Urmia UniversityAssistant Prof., Department of Forestry, Faculty of Natural Resources, Urmia UniversityAssistant Prof., Department of Forestry, Faculty of Natural Resources, Tarbiat Modares UniversityThis study aimed at investigating a range of widely-used approaches for indirect ordination analysis of vegetation. To this aim, a black pine (Pinus nigra Arnold.) plantation (9.2 ha) located at Urmia airport was studied. Nine plots of 100 m2 each were randomly set up in 50×50 m sampling grid, in which vegetation was recorded. In addition, three plots of 100 m2 with 50 meters interval were set up along transect in an adjacent meadow site as control area. We evaluated three ordination techniques (Principal Component Analysis, Detrended Correspondence Analysis, Non-Metric Multidimensional Scaling) with varying values of gradient length, Kaiser-Guttman, Broken stick, 70% of variance, eigenvalues > 0.4, final stress in NMDS ordination and Procrustean analysis. Result showed that all three ordinations are able to illustrate length of environmental gradient, though Procrustean analysis of all three datasets revealed significant differences in correlation between ordination methods. DCA had eigenvalues > 4.0, and the covered Kaiser-Guttman criterion with an axis. Moreover, final stress was < 10 in NMDS ordination, yet PCA covered Kaiser-Guttman and broken stick criteria at three axes. In conclusion, the most appropriate ordination methods across our test site included DCA and NMDS.http://ijfpr.areeo.ac.ir/article_106585_d0a239ae38c713f6890593d7fee8ce8e.pdfPCADCANMDSProcrustean analysis |
| spellingShingle | Javad Eshaghi Rad Naqme Pakgohar Abbas Banj Shafei Seyyed Jalil Alavi Comparison of indirect ordination methods for analysis of the vegetation (Case study: Urmia airport plantation) تحقیقات جنگل و صنوبر ایران PCA DCA NMDS Procrustean analysis |
| title | Comparison of indirect ordination methods for analysis of the vegetation (Case study: Urmia airport plantation) |
| title_full | Comparison of indirect ordination methods for analysis of the vegetation (Case study: Urmia airport plantation) |
| title_fullStr | Comparison of indirect ordination methods for analysis of the vegetation (Case study: Urmia airport plantation) |
| title_full_unstemmed | Comparison of indirect ordination methods for analysis of the vegetation (Case study: Urmia airport plantation) |
| title_short | Comparison of indirect ordination methods for analysis of the vegetation (Case study: Urmia airport plantation) |
| title_sort | comparison of indirect ordination methods for analysis of the vegetation case study urmia airport plantation |
| topic | PCA DCA NMDS Procrustean analysis |
| url | http://ijfpr.areeo.ac.ir/article_106585_d0a239ae38c713f6890593d7fee8ce8e.pdf |
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