globalchange  > 气候减缓与适应
DOI: 10.1002/ajb2.1231
WOS记录号: WOS:000459497400004
论文题名:
A decade of flowering phenology of the keystone saguaro cactus (Carnegiea gigantea)
作者: Renzi, Julianna J.1,2; Peachey, William D.3; Gerst, Katharine L.1,4
通讯作者: Gerst, Katharine L.
刊名: AMERICAN JOURNAL OF BOTANY
ISSN: 0002-9122
EISSN: 1537-2197
出版年: 2019
卷: 106, 期:2, 页码:199-210
语种: 英语
英文关键词: arid ecosystems ; bloom ; Cactaceae ; cacti ; climate change ; phenological metrics ; phenology ; traits ; Southwestern United States
WOS关键词: CLIMATE-CHANGE ; PLANT PHENOLOGY ; COLUMNAR CACTI ; RESPONSES ; REPRODUCTION ; ONSET ; POLLINATION ; CACTACEAE ; ECOLOGY ; WEATHER
WOS学科分类: Plant Sciences
WOS研究方向: Plant Sciences
英文摘要:

Premise of the Study Phenology is the study of biological life cycle events, such as flowering and migration. Climate patterns can alter these life history events, having ecosystem-wide ramifications. For example, warmer springs are associated with earlier leaf-out for many species, impacting species interactions and growing-season carbon dynamics. While phenological research has been conducted extensively in temperate regions, relatively little is known about the phenological responses in arid and semi-arid regions. Methods In this study we looked at the flowering phenology of a keystone species in the Sonoran Desert, the saguaro cactus (Carnegiea gigantea). The timing and abundance of flowering was observed on 151 individuals for 10 years at a site near Tucson, Arizona, USA. Using six phenological traits, we explored the relationship between saguaro size and flowering and the climatic drivers of flowering. Key Results Our analyses demonstrated how the calculation of phenological traits at the individual versus the population level can yield differing responses to climate variability, suggesting that not all studies examining the same trait (e.g., first day of bloom) are directly comparable. We found that larger cacti began flowering earlier, flowered for longer, and produced more flowers. Warmer temperatures were correlated with advanced onset and higher bloom yields, while increased precipitation appeared to delay onset and reduce bloom yields. Conclusions Given that climate models predict that the Southwestern USA will become increasingly warmer with more variable precipitation, saguaros may begin flowering earlier in the season and flower more intensely, which could impact pollen availability and population dynamics.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/128594
Appears in Collections:气候减缓与适应

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作者单位: 1.USA Natl Phenol Network, Natl Coordinating Off, Tucson, AZ 85721 USA
2.Duke Univ, Nicholas Sch Environm, Durham, NC 27708 USA
3.Sonoran Sci Solut, 550 N Ave Venado, Tucson, AZ 85748 USA
4.Univ Arizona, Sch Nat Resources & Environm, Tucson, AZ 85721 USA

Recommended Citation:
Renzi, Julianna J.,Peachey, William D.,Gerst, Katharine L.. A decade of flowering phenology of the keystone saguaro cactus (Carnegiea gigantea)[J]. AMERICAN JOURNAL OF BOTANY,2019-01-01,106(2):199-210
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