Seed burial depth, seedling emergence, and height as affected by animal trampling in marl soils

Jahantab, Esfandiar; Yazdanshenas, Habib; Saray, Ali Abdi; Matinkhah, S. Mojtaba; Khazaei, Majid

doi:10.1007/s11258-021-01213-6

Cited by 2 publications

(1 citation statement)

References 58 publications

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“…However, most authors rarely extended beyond depths of 10 cm [19]. Whether the seed bank can be seedlings after germination is not only determined by their characteristics, but also by their location in the soil [21,22]. The decline that resulted from the distribution of the seeds set in the sedimentation or disturbance of the substrate indicates that the longevity of the seeds in deeper layers is higher compared to species with more seeds in the surface layer [23,24].…”

Section: Introductionmentioning

confidence: 99%

Non-Additive Effects of Inundation Duration and Soil Depth on Seed Banks in a Shoreline Meadow of Poyang Lake in China

Liu,

Liao,

Jia

et al. 2023

Diversity

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Seed banks are fundamentally important components of the wetland ecosystem. Water levels on germination in soil seed banks have been documented in many ecosystems. However, there is a lack of knowledge about water levels on seed banks in freshwater wetlands, especially in those buried by sedimentation. Three burial depths (0–5 cm, 5–10 cm and 10–15 cm) within five water level gradient zones along the elevation in Poyang Lake, Eastern China, were sampled. The seedling-emergence method in a greenhouse under moist conditions and submersion was applied to allow all active seeds to be germinated. The experiment continued over an eight-week period in late spring up to early summer. A total of 7090 seedlings emerged, belonged to 20 families, 36 genera and 49 species. In terms of results, an average active soil seed density of 17,328 ± 1675 seeds/m2 was found in 0–15 cm in Poyang Lake, and the greatest average seed density was found at 0–5 cm with 7607 ± 790 seeds/m2, along with 5–10 cm and 10–15 cm with 5419 ± 589 seeds/m2 and 3855 ± 790 seeds/m2, respectively. An obvious difference in composition was found in the species composition of the seed bank at different water levels and burial depths. The highest water level and top layer of soil had the highest diversity index, with a Shannon–Wiener value of 2.011. Seed density, species richness and diversity decreased with the water level gradient zone from low elevation to high elevation and burial depth from surface to deepness. However, there was no interaction between inundation duration and burial depth, indicating that the water level fluctuation and sediment buried had a separate impact on the seed bank composition and diversity index. The present findings can be directly applied to the ecosystem conservation of healthy wetlands, and the ecological restoration of devastated and degraded wetlands in Poyang Lake.

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Section: Introductionmentioning

confidence: 99%

Non-Additive Effects of Inundation Duration and Soil Depth on Seed Banks in a Shoreline Meadow of Poyang Lake in China

Liu,

Liao,

Jia

et al. 2023

Diversity

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Grazing Effects on Seedling Emergence in Contrasting Wet and Dry Year in a Semiarid Grassland

Liu

2022

Agronomy

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Seedlings are a crucial part of the plant community and the basis of vegetation restoration and regeneration. Grazing and climate change are two main factors contributing to vegetation changes in semiarid grasslands. However, the effects of grazing on seedling emergence with rainfall variation are not clearly understood. This study aimed to address how seedling abundance and the emergence dynamics of annuals respond to grazing with rainfall changes in different years. We conducted a seedling investigation experiment in a grassland along a grazing intensity gradient (light grazing—LG; moderate grazing—MG; heavy grazing—HG) in contrasting wet and dry years. The results showed that MG increased the seedling richness of grasses and forbs in the wet year, but increasing grazing resulted in a decline in forb richness in the dry year. Seedling abundance of grasses was enhanced under MG, while seedling abundance of forbs was higher under HG. The monthly emergence dynamics were generally in a single peak pattern, but the peak time of seedling emergence for forbs advanced under HG. Seedling abundance of whole annuals increased with grazing in the wet year but was much higher under MG in the dry year. Our results suggest that more judicious grazing management based on rainfall variation and functional composition of the plant community should be undertaken to facilitate grassland restoration.

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Seed burial depth, seedling emergence, and height as affected by animal trampling in marl soils

Cited by 2 publications

References 58 publications

Non-Additive Effects of Inundation Duration and Soil Depth on Seed Banks in a Shoreline Meadow of Poyang Lake in China

Non-Additive Effects of Inundation Duration and Soil Depth on Seed Banks in a Shoreline Meadow of Poyang Lake in China

Grazing Effects on Seedling Emergence in Contrasting Wet and Dry Year in a Semiarid Grassland

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