The effect of inundation and salinity on the germination of seed banks from wetlands in South Australia

Goodman, Abigail M.; Ganf, George G.; Maier, Holger R.; Dandy, Graeme C.

doi:10.1016/j.aquabot.2010.11.003

Cited by 14 publications

(8 citation statements)

References 17 publications

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“…1b; cf. Goodman et al 2011). Each quadrat was subdivided into 4 equal quadrants, and data were obtained by visual estimate by the same individual observer.…”

Section: Methodsmentioning

confidence: 99%

Effects of Urochloa humidicola on Plant Diversity in Native Grasslands in a Neotropical Wetland

et al. 2015

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Studies on species invasion in wetlands are fundamental to understanding the consequences of the introduction of exotic plants, which are often utilized in grasslands. The loss of native plant diversity is of increasing concern. We evaluated the effect of Urochloa humidicola on floristic similarity between native and cultivated grasslands and the differences in spatial distributions between species. To analyze the effect of seasonality, we collected samples at the end of flood and dry periods. In native grasslands and another area cultivated with U. humidicola, samples were collected at three elevations (bottom; intermediate; and top). We identified 90 species and observed a high similarity between the cultivated and native grassland during the flood period; both grasslands exhibited significant differences during the drought period. This difference was due to an increased presence of grasses, mainly U. humidicola, in the cultivated grassland. Increased similarity between bottom and intermediate elevations was due to an increased proportion of aquatic macrophytes. In contrast, the top elevation differed due to the contribution of terrestrial species. We conclude that the native and cultivated grasslands exhibit differences in vegetation composition and are primarily structured by seasonal flooding, and small variations in elevation promote zonation within the plant community.

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“…1b; cf. Goodman et al 2011). Each quadrat was subdivided into 4 equal quadrants, and data were obtained by visual estimate by the same individual observer.…”

Section: Methodsmentioning

confidence: 99%

Effects of Urochloa humidicola on Plant Diversity in Native Grasslands in a Neotropical Wetland

et al. 2015

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“…For both post‐flood and post‐dry periods, we counted the number of seedlings within five 0.5 × 0.5 m plots at each topographic level, following the methodology of Goodman et al . (). We only considered seedlings that displayed cotyledons and up to the second pair of leaves (Brasil ) for richness and identification.…”

Section: Methodsmentioning

confidence: 97%

Seasonal flooding, topography, and organic debris interact to influence the emergence and distribution of seedlings in a tropical grassland

et al. 2018

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In seasonally flooded wetlands, inundation and associated organic debris deposition followed by a drawdown period can promote plant community diversity across space and time. Post‐flood regeneration might be influenced by the direct effect of flooding on seed dispersal and seedling emergence, as well as the indirect effect of organic debris on seed trapping and germination. Our objective was to examine the influence of seasonal flooding, topography, and organic debris cover on seedling distribution in a seasonally flooded grassland. We measured species richness, seedling abundance, and organic debris cover for 3 yr in a seasonally flooded grassland in the Pantanal, Brazil, at three topographic levels at the end of the flood season and during the dry season when there was no debris deposition. A total of 43 species were recorded, with no difference in species richness detected between seasons. However, the abundance of some species was higher post‐flood than during the dry period. The greatest seedling abundance and richness were found post‐flood at intermediate elevations, followed by high and the lowest elevations. Seed germination and seedling establishment were likely suppressed at low topographic positions due to shading from organic debris and poor drainage. Therefore, areas with predictable annual floods promote diversity by creating spatial and temporal variations in environmental conditions.

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“…For wetland soil seed banks, appropriate submersion favours seed germination and improvement of plant species diversity (Ge, Liu, & Wang, 2013;Goodman et al, 2011). However, long-term submersion can cause changes in soil oxygen content, water content, and temperature, which in turn affect seed germination in soil seed banks (Vidal, Andrade, Andrade, & Mielke, 2014;Wang, Jiang, Lu, & Wang, 2013).…”

Section: Effects Of Reversal Seasonal Submersion On the Germinationmentioning

confidence: 99%

“…The germination and persistence of soil seed banks influence the regeneration and succession of plant communities (Collins, Conway, Mason, & Gunnels, ; Lu et al, ). The activity of soil seed banks, especially in response to various stress factors such as submersion and drought, often changes and affects seed germination and persistence (Goodman, Ganf, Maier, & Dandy, ). Waterlogging stress is an important factor affecting the germination and persistence of soil seed banks in riparian zones.…”

Section: Introductionmentioning

confidence: 99%

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Effects of reverse seasonal submersion on the germination and persistence of soil seed banks in hydro‐fluctuation belts

Chen

et al. 2018

Ecohydrology

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The construction of the Three Gorges Dam has resulted in the occurrence of reverse seasonal water‐level fluctuations. The species composition and quantity of riparian soil seed banks collected from four hydro‐fluctuation belts were assessed by simulating different submersion cycles to determine the effects of reverse seasonal water‐level fluctuations on the germination and persistence of soil seed banks in the Three Gorges Reservoir Region. Results showed the number of species that germinated from the soil seed bank decreased with submersion. The number of germinated seeds in soil seed banks after submersion for 7 months in Xingshan, Zigui, Wanzhou, and Zhongxian decreased by 60%, 53%, 57%, and 57%, respectively, relative to the control. The species diversity index and seed density of germinated seeds in soil seed banks also significantly decreased with prolongation of submersion time. Seed density decreased by 93%, 83%, 76%, and 72%, respectively, after 7 months of submersion. Species composition and dominance within the soil seed bank changed over time due to submersion. In general, reverse seasonal submersion negatively impacts the germination and persistence of soil seed banks. The response of soil seed bank germination and persistence to reverse seasonal submersion became the key factor determining the heterogeneity in the spatial distribution of the soil seed bank in hydro‐fluctuation belts due to the large differences in submersion time between areas at various elevations.

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The effect of inundation and salinity on the germination of seed banks from wetlands in South Australia

Cited by 14 publications

References 17 publications

Effects of Urochloa humidicola on Plant Diversity in Native Grasslands in a Neotropical Wetland

Effects of Urochloa humidicola on Plant Diversity in Native Grasslands in a Neotropical Wetland

Seasonal flooding, topography, and organic debris interact to influence the emergence and distribution of seedlings in a tropical grassland

Effects of reverse seasonal submersion on the germination and persistence of soil seed banks in hydro‐fluctuation belts

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