Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s11258-010-9806-x |
Seed characteristics and soil surface patch type interact to affect germination of semi-arid woodland species | |
Briggs, Amber L.; Morgan, John W. | |
通讯作者 | Morgan, John W. |
来源期刊 | PLANT ECOLOGY |
ISSN | 1385-0237 |
EISSN | 1573-5052 |
出版年 | 2011 |
卷号 | 212期号:1页码:91-103 |
英文摘要 | Biological soil crusts are common in many arid and semi-arid regions and they can alter microenvironments which are likely to directly and indirectly influence vascular plant establishment. The effect of biological soil crusts on germination is also influenced by the biological characteristics of the seeds themselves but rarely have the effects of both crust type and seed morphology on germination been examined in the same study. In this study, seed of five semi-arid woodland species with contrasting seed morphology were sown on top of patch types that commonly occur in natural woodlands (foliose lichen, short-turf moss, tree leaf litter, disturbed crust) and their emergence was followed. Percent germination varied between patch types and, for the largest-seeded species (Maireana excavata), final germination was significantly lower on the biological soil crust and litter patch types because they strongly acted as a physical barrier to seed penetration into the soil. The remaining four species showed no significant differences in final percent germination with patch type because most seeds either completely or partially penetrated the surface layer. Germination time courses, however, showed that biological soil crusts delayed the timing of germination of these species. Hence, soil crusts might differentially affect the spatial patterning of species in semi-arid woodlands by their subtle influence on seedling emergence that is determined by differences in seed morphology and subsequent positioning within crusts. |
英文关键词 | Seedling regeneration Biological soil crust Safe site Litter Disturbance Seed morphology |
类型 | Article |
语种 | 英语 |
国家 | Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000286204100010 |
WOS关键词 | XERIC FLORIDA SHRUBLAND ; NEW-SOUTH-WALES ; VASCULAR PLANTS ; CHALK GRASSLAND ; CRYPTOGAMIC CRUSTS ; EASTERN AUSTRALIA ; BRYOPHYTE LAYER ; ARID LANDS ; EMERGENCE ; DESERT |
WOS类目 | Plant Sciences ; Ecology ; Forestry |
WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology ; Forestry |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/170021 |
作者单位 | La Trobe Univ, Dept Bot, Bundoora, Vic 3086, Australia |
推荐引用方式 GB/T 7714 | Briggs, Amber L.,Morgan, John W.. Seed characteristics and soil surface patch type interact to affect germination of semi-arid woodland species[J],2011,212(1):91-103. |
APA | Briggs, Amber L.,&Morgan, John W..(2011).Seed characteristics and soil surface patch type interact to affect germination of semi-arid woodland species.PLANT ECOLOGY,212(1),91-103. |
MLA | Briggs, Amber L.,et al."Seed characteristics and soil surface patch type interact to affect germination of semi-arid woodland species".PLANT ECOLOGY 212.1(2011):91-103. |
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