1
|
Ma Z, Chen MH. A Bayesian model-based reduced major axis regression. Biom J 2024; 66:e2300279. [PMID: 38576312 DOI: 10.1002/bimj.202300279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 02/04/2024] [Accepted: 02/16/2024] [Indexed: 04/06/2024]
Abstract
Reduced major axis (RMA) regression, widely used in the fields of zoology, botany, ecology, biology, spectroscopy, and among others, outweighs the ordinary least square regression by relaxing the assumption that the covariates are without measurement errors. A Bayesian implementation of the RMA regression is presented in this paper, and the equivalence of the estimates of the parameters under the Bayesian and the frequentist frameworks is proved. This model-based Bayesian RMA method is advantageous since the posterior estimates, the standard deviations, as well as the credible intervals of the estimates can be obtained through Markov chain Monte Carlo methods directly. In addition, it is straightforward to extend to the multivariate RMA case. The performance of the Bayesian RMA approach is evaluated in the simulation study, and, finally, the proposed method is applied to analyze a dataset in the plantation.
Collapse
Affiliation(s)
- Zhihua Ma
- Department of Statistics, Shenzhen University, Shenzhen, China
| | - Ming-Hui Chen
- Department of Statistics, University of Connecticut, Storrs, Connecticut, USA
| |
Collapse
|
2
|
Dai L, Guo X, Ke X, Lan Y, Zhang F, Li Y, Lin L, Li Q, Cao G, Fan B, Qian D, Zhou H, Du Y. Biomass allocation and productivity-richness relationship across four grassland types at the Qinghai Plateau. Ecol Evol 2020; 10:506-516. [PMID: 31988738 PMCID: PMC6972799 DOI: 10.1002/ece3.5920] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 10/27/2019] [Accepted: 11/20/2019] [Indexed: 11/24/2022] Open
Abstract
Aboveground biomass (AGB) and belowground biomass (BGB) allocation and productivity-richness relationship are controversial. Here, we assessed AGB and BGB allocation and the productivity-richness relationship at community level across four grassland types based on the biomass data collected from 80 sites across the Qinghai Plateau during 2011-2012. The reduced major axis regression and general linear models were used and showed that (a) the median values of AGB were significantly higher in alpine meadow than in other three grassland types; the ratio of root to shoot (R/S) was significantly higher in desert grassland (36.06) than intemperate grassland (16.60), alpine meadow (13.35), and meadow steppe (19.46). The temperate grassland had deeper root distribution than the other three grasslands, with about 91.45% roots distributed in the top 30 cm soil layer. (b) The slopes between log AGB and log BGB in the temperate grassland and meadow steppe were 1.09 and 1, respectively, whereas that in the desert grassland was 1.12, which was significantly different from the isometric allocation relationship. A competitive relationship between AGB and BGB was observed in the alpine meadow with a slope of -1.83, indicating a trade-off between AGB and BGB in the alpine meadow. (c) A positive productivity-richness relationship existed across the four grassland types, suggesting that the positive productivity-richness relationship might not be affected by the environmental factors at the plant location. Our results provide a new insight for biomass allocation and biodiversity-ecosystem functioning research.
Collapse
Affiliation(s)
- Licong Dai
- Qinghai Provincial Key Laboratory of Restoration Ecology for Cold RegionNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- University of Chinese Academy of ScienceBeijingChina
| | - Xiaowei Guo
- Qinghai Provincial Key Laboratory of Restoration Ecology for Cold RegionNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
| | - Xun Ke
- Qinghai Provincial Key Laboratory of Restoration Ecology for Cold RegionNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- University of Chinese Academy of ScienceBeijingChina
| | - Yuting Lan
- Qinghai Provincial Key Laboratory of Restoration Ecology for Cold RegionNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
| | - Fawei Zhang
- Qinghai Provincial Key Laboratory of Restoration Ecology for Cold RegionNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- College of Life SciencesLuoyang Normal UniversityLuoyangChina
| | - Yikang Li
- Qinghai Provincial Key Laboratory of Restoration Ecology for Cold RegionNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
| | - Li Lin
- Qinghai Provincial Key Laboratory of Restoration Ecology for Cold RegionNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
| | - Qian Li
- Qinghai Provincial Key Laboratory of Restoration Ecology for Cold RegionNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
| | - Guangmin Cao
- Qinghai Provincial Key Laboratory of Restoration Ecology for Cold RegionNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
| | - Bo Fan
- Qinghai Provincial Key Laboratory of Restoration Ecology for Cold RegionNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
| | - Dawen Qian
- Qinghai Provincial Key Laboratory of Restoration Ecology for Cold RegionNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
| | - Huakun Zhou
- Qinghai Provincial Key Laboratory of Restoration Ecology for Cold RegionNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
| | - Yangong Du
- Qinghai Provincial Key Laboratory of Restoration Ecology for Cold RegionNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
- Key Laboratory of Adaptation and Evolution of Plateau BiotaNorthwest Institute of Plateau BiologyChinese Academy of SciencesXiningChina
| |
Collapse
|
3
|
Lin S, Shao L, Hui C, Song Y, Reddy GVP, Gielis J, Li F, Ding Y, Wei Q, Shi P. Why Does Not the Leaf Weight-Area Allometry of Bamboos Follow the 3/2-Power Law? Front Plant Sci 2018; 9:583. [PMID: 29780397 PMCID: PMC5945892 DOI: 10.3389/fpls.2018.00583] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 04/13/2018] [Indexed: 05/26/2023]
Abstract
The principle of similarity (Thompson, 1917) states that the weight of an organism follows the 3/2-power law of its surface area and is proportional to its volume on the condition that the density is constant. However, the allometric relationship between leaf weight and leaf area has been reported to greatly deviate from the 3/2-power law, with the irregularity of leaf density largely ignored for explaining this deviation. Here, we choose 11 bamboo species to explore the allometric relationships among leaf area (A), density (ρ), length (L), thickness (T), and weight (W). Because the edge of a bamboo leaf follows a simplified two-parameter Gielis equation, we could show that A ∝ L2 and that A ∝ T2. This then allowed us to derive the density-thickness allometry ρ ∝ Tb and the weight-area allometry W ∝ A(b+3)/2 ≈ A9/8, where b approximates -3/4. Leaf density is strikingly negatively associated with leaf thickness, and it is this inverse relationship that results in the weight-area allometry to deviate from the 3/2-power law. In conclusion, although plants are prone to invest less dry mass and thus produce thinner leaves when the leaf area is sufficient for photosynthesis, such leaf thinning needs to be accompanied with elevated density to ensure structural stability. The findings provide the insights on the evolutionary clue about the biomass investment and output of photosynthetic organs of plants. Because of the importance of leaves, plants could have enhanced the ratio of dry material per unit area of leaf in order to increase the efficiency of photosynthesis, relative the other parts of plants. Although the conclusion is drawn only based on 11 bamboo species, it should also be applicable to the other plants, especially considering previous works on the exponent of the weight-area relationship being less than 3/2 in plants.
Collapse
Affiliation(s)
- Shuyan Lin
- Co-Innovation Centre for Sustainable Forestry in Southern China, Bamboo Research Institute, Nanjing Forestry University, Nanjing, China
| | - Lijuan Shao
- Co-Innovation Centre for Sustainable Forestry in Southern China, Bamboo Research Institute, Nanjing Forestry University, Nanjing, China
| | - Cang Hui
- Department of Mathematical Sciences, Centre for Invasion Biology, African Institute for Mathematical Sciences, Stellenbosch University, Matieland, South Africa
| | - Yu Song
- Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, China
| | - Gadi V. P. Reddy
- Western Triangle Agricultural Research Centre, Montana State University, Conrad, MT, United States
| | - Johan Gielis
- Department of Biosciences Engineering, University of Antwerp, Antwerp, Belgium
| | - Fang Li
- Co-Innovation Centre for Sustainable Forestry in Southern China, Bamboo Research Institute, Nanjing Forestry University, Nanjing, China
| | - Yulong Ding
- Co-Innovation Centre for Sustainable Forestry in Southern China, Bamboo Research Institute, Nanjing Forestry University, Nanjing, China
| | - Qiang Wei
- Co-Innovation Centre for Sustainable Forestry in Southern China, Bamboo Research Institute, Nanjing Forestry University, Nanjing, China
| | - Peijian Shi
- Co-Innovation Centre for Sustainable Forestry in Southern China, Bamboo Research Institute, Nanjing Forestry University, Nanjing, China
| |
Collapse
|