Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.1016/j.catena.2018.11.026 |
| Geomorphology, soil and vegetation patterns in an arid ecotone | |
| Casalini, Ana I.1; Bouza, Pablo J.1; Bisigato, Alejandro J.1,2 | |
| 通讯作者 | Casalini, Ana I. |
| 来源期刊 | CATENA
 |
| ISSN | 0341-8162 |
| EISSN | 1872-6887 |
| 出版年 | 2019 |
| 卷号 | 174页码:353-361 |
| 英文摘要 | Ecotonal boundaries are often arranged by following topoedaphic gradients. Despite its relevance, the interrelationships between vegetation and geomorphology have not been adequately documented in most arid regions. The Southern Monte - Patagonia ecotone, defined by anastomosing systems of paleochannels and paleobars, presents an opportunity to study these interrelationships. Our aim was to determine whether topography and/or soil characteristics explained the distribution of communities which are typical of both Phytogeographic Provinces. Vegetation and soil surveys were performed along topographical gradients found between several paleochannels and paleobars. Surface soil texture, organic carbon, total nitrogen, carbonate content and electric conductivity were measured at each site. Digital elevation models and moisture index maps were derived from topographical field data. Soil and plant cover differences between landforms were inspected. Afterwards, species distribution, communities' attributes and its relation with topographical variables were explored. Paleochannels exhibited higher shrub and total cover, as well as higher organic carbon and lower carbonate content than the paleobars. Chuquiraga avellanedae (Asteraceae) dominated the plant community in the paleochannels, while on the contrary Larrea divaricata (Zygophyllaceae) was the most abundant species found on the paleobars. These communities are related to Patagonia and Monte Phytogeographic Provinces, respectively. Species distribution was mainly explained by elevation and secondly by surface water redistribution. Current vegetation patterns strongly mirror the paleolandscape and as a consequence of that, plant communities are interspersed throughout the landscape. Our results emphasize the importance of geomorphology as a factor influencing community distribution along arid ecotones. |
| 英文关键词 | Geomorphology Arid environments Spatial data Soil heterogeneity |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | Argentina |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000456754600033 |
| WOS关键词 | PLANT-COMMUNITIES ; FLORISTIC COMPOSITION ; SPATIAL-DISTRIBUTION ; ORGANIC-MATTER ; DESERT ; LANDSCAPE ; HETEROGENEITY ; TOPOGRAPHY ; GRASSLAND ; DIVERSITY |
| WOS类目 | Geosciences, Multidisciplinary ; Soil Science ; Water Resources |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/214823 |
| 作者单位 | 1.Consejo Nacl Invest Cient & Tecn, IPEEC, Blvd Brown 2915, RA-9120 Puerto Madryn, Argentina; 2.Univ Nacl Patagonia San Juan Bosco, Blvd Brown 3500, RA-9120 Puerto Madryn, Argentina |
| 推荐引用方式 GB/T 7714 | Casalini, Ana I.,Bouza, Pablo J.,Bisigato, Alejandro J.. Geomorphology, soil and vegetation patterns in an arid ecotone[J],2019,174:353-361. |
| APA | Casalini, Ana I.,Bouza, Pablo J.,&Bisigato, Alejandro J..(2019).Geomorphology, soil and vegetation patterns in an arid ecotone.CATENA,174,353-361. |
| MLA | Casalini, Ana I.,et al."Geomorphology, soil and vegetation patterns in an arid ecotone".CATENA 174(2019):353-361. |
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