Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1016/j.ppees.2019.125501 |
| Reshaping phenology: Grazing has stronger effects than climate on flowering and fruiting phenology in desert plants | |
| Tadey, Mariana | |
| 通讯作者 | Tadey, Mariana |
| 来源期刊 | PERSPECTIVES IN PLANT ECOLOGY EVOLUTION AND SYSTEMATICS
 |
| ISSN | 1433-8319 |
| 出版年 | 2020 |
| 卷号 | 42 |
| 英文摘要 | Resources and climatic conditions impose bottom-up selective forces on flowering phenology, enabling flowering to occur when climatic conditions are the most suitable for reproduction. However, phenological rhythms also suffer from top-down forces imposed by herbivory, which may alter plant resources intake and allocation. I analysed the net effect of grazing and climate on phenological variables in an arid environment in northern Patagonia, using a hypothetical d-separation hierarchical path model, postulating two main pathways. One path analysed the effect of large exotic herbivores on flowering phenology and plant fitness, through plant damage. A second path estimated the effects of two main climatic variables (temperature and precipitation) on flowering phenology and plant fitness. Therefore, if climate has a stronger influence on flowering phenology than grazing, precipitation and/or temperature should show a stronger association with phenological variables than large herbivores' density. I selected eight of the most common native plant species from seven independent rangelands located under the same environmental conditions but which differed in grazing intensity to study flowering phenology over four spring-summer seasons. I found that herbivore density had a stronger (negative) effect than climatic variables on flowering phenology affecting plant fitness. As grazing intensity increased, blooming started earlier, decreased in intensity, lasted for a shorter period of time leading to earlier fruiting. Temperature and precipitation had a positive effect on both flowering phenology and plant fitness, temperature having more influence than precipitation. My results suggest that grazing can impose top-down effects on the phenological variables and fitness of desert vegetation and that these are not counteracted by the bottom-up effects produced by climate. This illustrates a novel way through which exotic animals can affect ecosystem dynamics: by reshaping patterns of flowering phenology. |
| 英文关键词 | Flowering intensity Flowering peak Flowering starting date Fruiting peak Fruiting intensity Livestock density |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | Argentina |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000510855800002 |
| WOS关键词 | FEMALE REPRODUCTIVE TRAITS ; POLLINATOR INTERACTIONS ; COMMUNITY COMPOSITION ; FLORAL CHARACTERS ; POLLEN LIMITATION ; PATAGONIAN MONTE ; FOLIAR HERBIVORY ; LAND DEGRADATION ; SEED PRODUCTION ; CONSEQUENCES |
| WOS类目 | Plant Sciences ; Ecology |
| WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology |
| EI主题词 | 2020-02-01 |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/312789 |
| 作者单位 | Consejo Nacl Invest Cient & Tecn, Lab Ecotono, INIBIOMA, Pasaje Gutierrez 1125, San Carlos De Bariloche, Rio Negro, Argentina |
| 推荐引用方式 GB/T 7714 | Tadey, Mariana. Reshaping phenology: Grazing has stronger effects than climate on flowering and fruiting phenology in desert plants[J],2020,42. |
| APA | Tadey, Mariana.(2020).Reshaping phenology: Grazing has stronger effects than climate on flowering and fruiting phenology in desert plants.PERSPECTIVES IN PLANT ECOLOGY EVOLUTION AND SYSTEMATICS,42. |
| MLA | Tadey, Mariana."Reshaping phenology: Grazing has stronger effects than climate on flowering and fruiting phenology in desert plants".PERSPECTIVES IN PLANT ECOLOGY EVOLUTION AND SYSTEMATICS 42(2020). |
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