Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s11258-006-9158-8 |
Seed banks in arid wetlands with contrasting flooding, salinity and turbidity regimes | |
Porter, John L.; Kingsford, Richard T.; Brock, Margaret A. | |
通讯作者 | Porter, John L. |
来源期刊 | PLANT ECOLOGY
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ISSN | 1385-0237 |
出版年 | 2007 |
卷号 | 188期号:2页码:215-234 |
英文摘要 | Aquatic plant communities in arid zone wetlands underpin diverse fauna populations and ecosystem functions yet are relatively poorly known. Erratic flooding, drying, salinity and turbidity regimes contribute to habitat complexity, creating high spatial and temporal variability that supports high biodiversity. We compared seed bank density, species richness and community composition of aquatic plants (submergent, floating-leaved and emergent) among nine Australian arid zone wetlands. Germinable seed banks from wetlands within the Paroo and Bulloo River catchments were examined at nested scales (site, wetland, wetland type) using natural flooding and salinity regimes as factors with nondormant seed density and species richness as response variables. Salinity explained most of the variance in seed density (95%) and species richness (68%), with flooding accounting for 5% of variance in seed density and 32% in species richness. Salinity-flooding interactions were significant but explained only a trivial portion of the variance (< 1%). Mean seed densities in wetlands ranged from 40 to 18,760 m(-2) and were highest in wetlands with intermediate levels of salinity and flooding. Variability of densities was high (CVs 0.61-2.66), particularly in saline temporary and fresh permanent wetlands. Below salinities of c. 30 g l(-1) TDS, seed density was negatively correlated to turbidity and connectivity. Total species richness of wetlands (6-27) was negatively correlated to salinity, pH and riverine connectivity. A total of 40 species germinated, comprising submergent (15 species), floating-leaved or amphibious (17 species), emergent (6 species) and terrestrial (6 species) groups. Charophytes were particularly important with 10 species (five Chara spp., four Nitella spp. and Lamprothamnium macropogon), accounting for 68% of total abundance. Saline temporary wetlands were dominated by Ruppia tuberosa, Lamprothamnium macropogon and Lepilaena preissii. Variable flooding and drying regimes profoundly altered water quality including salinity and turbidity, producing distinctive aquatic plant communities as reflected by their seed banks. This reinforces the importance of hydrology in shaping aquatic biological communities in arid systems. |
英文关键词 | charophyte macrophyte aquatic plant temporary wetland permanent wetland dryland wetland |
类型 | Review |
语种 | 英语 |
国家 | USA ; Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000243399000008 |
WOS关键词 | NEW-SOUTH-WALES ; COMMUNITY STRUCTURE ; WATER REGIME ; RIVER MURRAY ; AQUATIC ORGANISMS ; SPECIES RICHNESS ; LITTORAL PLANTS ; COOPER CREEK ; AUSTRALIA ; FLOODPLAIN |
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/2XILL650/155696 |
作者单位 | (1)Dept Environm & Conservat, Arlington, VA 22209 USA;(2)Univ New S Wales, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia;(3)Dept Nat Resources, Armidale, NSW 2351, Australia;(4)Univ New England, Sch Environm Sci & Nat Resource Management, Armidale, NSW 2351, Australia |
推荐引用方式 GB/T 7714 | Porter, John L.,Kingsford, Richard T.,Brock, Margaret A.. Seed banks in arid wetlands with contrasting flooding, salinity and turbidity regimes[J],2007,188(2):215-234. |
APA | Porter, John L.,Kingsford, Richard T.,&Brock, Margaret A..(2007).Seed banks in arid wetlands with contrasting flooding, salinity and turbidity regimes.PLANT ECOLOGY,188(2),215-234. |
MLA | Porter, John L.,et al."Seed banks in arid wetlands with contrasting flooding, salinity and turbidity regimes".PLANT ECOLOGY 188.2(2007):215-234. |
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