Population Structures and Dynamics of <i>Rhododendron</i> Communities with Different Stages of Succession in Northwest Guizhou, China
To explore the population structures and dynamics of <i>Rhododendron</i> shrub communities at different stages of succession in northwest Guizhou, China, this study examined the populations of <i>Rhododendron annae</i> and <i>Rhododendron irroratum</i> shrub with...
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MDPI AG
2024-03-01
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| Online Access: | https://www.mdpi.com/2223-7747/13/7/946 |
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| author | Yaoyao Zhang Jianli Wang Xiaojing Wang Lingjun Wang Yuefeng Wang Junpeng Wei Zijing Niu Linye Jian Baocheng Jin Chao Chen Xuechun Zhao |
| author_facet | Yaoyao Zhang Jianli Wang Xiaojing Wang Lingjun Wang Yuefeng Wang Junpeng Wei Zijing Niu Linye Jian Baocheng Jin Chao Chen Xuechun Zhao |
| author_sort | Yaoyao Zhang |
| collection | DOAJ |
| description | To explore the population structures and dynamics of <i>Rhododendron</i> shrub communities at different stages of succession in northwest Guizhou, China, this study examined the populations of <i>Rhododendron annae</i> and <i>Rhododendron irroratum</i> shrub with two different stages. A space-for-time substitution was employed to establish the diameter class/height structures, static life tables, and survival/mortality rate/disappearance rate curves of both <i>Rhododendron</i> populations with different orders of succession. Their structural and quantitative dynamics were analyzed, and their development trends were predicted. The results showed that, quantitatively, the populations of <i>R. annae</i> and <i>R. irroratum</i> in the two <i>Rhododendron</i> communities with different orders of succession were dominated by age classes one, two, and three as well as height classes i, ii, and iii. The number of <i>Rhododendron</i> plants at the three age classes and the three height classes accounted for 97.61–100% of the total. The quantitative dynamic indices of <i>R. annae</i> and <i>R. irroratum</i> were both greater than 0, with and without considering external interference. In terms of age class and height structures, both <i>Rhododendron</i> populations were expanding populations, presenting “inverted-J-shaped” and irregular pyramid patterns. There was a sufficient number of young individuals, but few or no old individuals. Both survival curves of the populations of <i>R. annae</i> and <i>R. irroratum</i> in the two <i>Rhododendron</i> communities with different orders of succession belonged to the Deevy-II type. In the late stage of succession, the mortality curves and disappearance curves of both <i>Rhododendron</i> populations in these communities presented a trend of increasing first and then decreasing with increasing age class. This result indicates that at each age class, <i>R. annae</i> and <i>R. irroratum</i> showed a trend of gradual increase after two, four, and six years. In brief, the populations of <i>R. annae</i> and <i>R. irroratum</i> have rich reserves of seedlings and saplings, but high mortality and disappearance rates. In this context, it is necessary to reduce human interference and implement targeted conservation measures to promote the natural renewal of <i>Rhododendron</i> populations. |
| first_indexed | 2024-04-24T10:36:20Z |
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| id | doaj.art-05e8d43058f44e6290934cc11aa9555e |
| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-04-24T10:36:20Z |
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| spelling | doaj.art-05e8d43058f44e6290934cc11aa9555e2024-04-12T13:24:42ZengMDPI AGPlants2223-77472024-03-0113794610.3390/plants13070946Population Structures and Dynamics of <i>Rhododendron</i> Communities with Different Stages of Succession in Northwest Guizhou, ChinaYaoyao Zhang0Jianli Wang1Xiaojing Wang2Lingjun Wang3Yuefeng Wang4Junpeng Wei5Zijing Niu6Linye Jian7Baocheng Jin8Chao Chen9Xuechun Zhao10College of Animal Science, Guizhou University, Guiyang 550025, ChinaCollege of Animal Science, Guizhou University, Guiyang 550025, ChinaInstitute of Agro-Bioengineering, Guizhou University, Guiyang 550025, ChinaInstitute of Azalea, Baili Azalea Management Committee, Bijie 551614, ChinaCollege of Animal Science, Guizhou University, Guiyang 550025, ChinaCollege of Animal Science, Guizhou University, Guiyang 550025, ChinaCollege of Animal Science, Guizhou University, Guiyang 550025, ChinaCollege of Animal Science, Guizhou University, Guiyang 550025, ChinaCollege of Animal Science, Guizhou University, Guiyang 550025, ChinaCollege of Animal Science, Guizhou University, Guiyang 550025, ChinaCollege of Animal Science, Guizhou University, Guiyang 550025, ChinaTo explore the population structures and dynamics of <i>Rhododendron</i> shrub communities at different stages of succession in northwest Guizhou, China, this study examined the populations of <i>Rhododendron annae</i> and <i>Rhododendron irroratum</i> shrub with two different stages. A space-for-time substitution was employed to establish the diameter class/height structures, static life tables, and survival/mortality rate/disappearance rate curves of both <i>Rhododendron</i> populations with different orders of succession. Their structural and quantitative dynamics were analyzed, and their development trends were predicted. The results showed that, quantitatively, the populations of <i>R. annae</i> and <i>R. irroratum</i> in the two <i>Rhododendron</i> communities with different orders of succession were dominated by age classes one, two, and three as well as height classes i, ii, and iii. The number of <i>Rhododendron</i> plants at the three age classes and the three height classes accounted for 97.61–100% of the total. The quantitative dynamic indices of <i>R. annae</i> and <i>R. irroratum</i> were both greater than 0, with and without considering external interference. In terms of age class and height structures, both <i>Rhododendron</i> populations were expanding populations, presenting “inverted-J-shaped” and irregular pyramid patterns. There was a sufficient number of young individuals, but few or no old individuals. Both survival curves of the populations of <i>R. annae</i> and <i>R. irroratum</i> in the two <i>Rhododendron</i> communities with different orders of succession belonged to the Deevy-II type. In the late stage of succession, the mortality curves and disappearance curves of both <i>Rhododendron</i> populations in these communities presented a trend of increasing first and then decreasing with increasing age class. This result indicates that at each age class, <i>R. annae</i> and <i>R. irroratum</i> showed a trend of gradual increase after two, four, and six years. In brief, the populations of <i>R. annae</i> and <i>R. irroratum</i> have rich reserves of seedlings and saplings, but high mortality and disappearance rates. In this context, it is necessary to reduce human interference and implement targeted conservation measures to promote the natural renewal of <i>Rhododendron</i> populations.https://www.mdpi.com/2223-7747/13/7/946<i>Rhododendron</i> shrub<i>Rhododendron annae</i><i>Rhododendron irroratum</i>population structurepopulation dynamics |
| spellingShingle | Yaoyao Zhang Jianli Wang Xiaojing Wang Lingjun Wang Yuefeng Wang Junpeng Wei Zijing Niu Linye Jian Baocheng Jin Chao Chen Xuechun Zhao Population Structures and Dynamics of <i>Rhododendron</i> Communities with Different Stages of Succession in Northwest Guizhou, China Plants <i>Rhododendron</i> shrub <i>Rhododendron annae</i> <i>Rhododendron irroratum</i> population structure population dynamics |
| title | Population Structures and Dynamics of <i>Rhododendron</i> Communities with Different Stages of Succession in Northwest Guizhou, China |
| title_full | Population Structures and Dynamics of <i>Rhododendron</i> Communities with Different Stages of Succession in Northwest Guizhou, China |
| title_fullStr | Population Structures and Dynamics of <i>Rhododendron</i> Communities with Different Stages of Succession in Northwest Guizhou, China |
| title_full_unstemmed | Population Structures and Dynamics of <i>Rhododendron</i> Communities with Different Stages of Succession in Northwest Guizhou, China |
| title_short | Population Structures and Dynamics of <i>Rhododendron</i> Communities with Different Stages of Succession in Northwest Guizhou, China |
| title_sort | population structures and dynamics of i rhododendron i communities with different stages of succession in northwest guizhou china |
| topic | <i>Rhododendron</i> shrub <i>Rhododendron annae</i> <i>Rhododendron irroratum</i> population structure population dynamics |
| url | https://www.mdpi.com/2223-7747/13/7/946 |
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