Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1016/j.flora.2019.01.006 |
| Long-term growth rates of two caulescent rosette species, Coespeletia timotensis (Cuatrec.) Cuatrec., and Espeletia schultzii Wedd., in an Andean paramo | |
| Perez, Francisco L. | |
| 通讯作者 | Perez, Francisco L. |
| 来源期刊 | FLORA
 |
| ISSN | 0367-2530 |
| EISSN | 1618-0585 |
| 出版年 | 2019 |
| 卷号 | 252页码:1-9 |
| 英文摘要 | Growth rates of two caulescent rosette species, Coespeletia timotensis and Espeletia schultzii, were estimated in Piedras Blancas, an Andean paramo, on 4 sites at 4270-4525 m, near their upper elevation limits. Stem and crown height were measured at the start and end of the study periods, and differences in plant stature divided by number of years to obtain annual growth rates. An isolated C. timotensis on a granite outcrop at 4525 m grew 1.08 cm/yr average for 19.5 yrs, but its elongation rate dropped gradually with time. 60 C. timotensis on a dense valley-floor stand at <= 4285m showed an average rate of 1.34 +/- 0.59 cm/yr for > 10 yrs; growth varied between -0.2 and 3.16 cm/yr and was not associated with initial plant height. 31 E. schultzii rosettes on a basal slope stand at <= 4300m grew 1.15 +/- 0.51 cm/yr during > 10 yrs; growth ranged from 0.44 to 2.37 cm/yr and appeared to be inversely correlated with plant stature. Each stand exhibited fairly uniform aspect, gradient, slope position, and groundcover, but microsite differences, including soil nutrient and moisture content, proximity to rocks, and competitive plant interactions, may have affected rosette development. Mortality was similar for both species (18.4-18.9%) but was higher for C. timotensis seedlings and taller plants, which tilted and toppled, presumably due to ground frost disturbance. Mortality was also concentrated on larger E. schultzii plants, but these remained standing and did not topple. Due to extreme growth variation, use of average rates to calculate ages of individual rosettes is not recommended. |
| 英文关键词 | Asteraceae Espeletiinae Caulirosula Growth rates High paramos Repeat photography |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | USA |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000459917800001 |
| WOS关键词 | SENECIO-KENIODENDRON ; GIANT ; COMPOSITAE ; DEMOGRAPHY ; DESERT ; LEAF |
| WOS类目 | Plant Sciences ; Ecology |
| WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/215640 |
| 作者单位 | Univ Texas Austin, Dept Geog & Environm, Austin, TX 78712 USA |
| 推荐引用方式 GB/T 7714 | Perez, Francisco L.. Long-term growth rates of two caulescent rosette species, Coespeletia timotensis (Cuatrec.) Cuatrec., and Espeletia schultzii Wedd., in an Andean paramo[J],2019,252:1-9. |
| APA | Perez, Francisco L..(2019).Long-term growth rates of two caulescent rosette species, Coespeletia timotensis (Cuatrec.) Cuatrec., and Espeletia schultzii Wedd., in an Andean paramo.FLORA,252,1-9. |
| MLA | Perez, Francisco L.."Long-term growth rates of two caulescent rosette species, Coespeletia timotensis (Cuatrec.) Cuatrec., and Espeletia schultzii Wedd., in an Andean paramo".FLORA 252(2019):1-9. |
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