The soil seed bank of a rehabilitated draw‐down zone and its similarity to standing vegetation in the Three Gorges Reservoir Area

Zhang, Miao; Chen, Fangqing; Chen, Shaohua; Xie, Zuoming; Huang, Yongwen; Liu, Yangbin

doi:10.1007/s11284-017-1518-4

Cited by 9 publications

(5 citation statements)

References 39 publications

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“…The structure of soil seedbank and its relationship with the above-ground vegetation are considered a crucial evidence for the recruitment of plant community after disturbance (Capon and Brock 2006;Bossuyt and Honnay 2008;Zhang et al 2017). The results of the soil seedling emergence experiment showed that most species were annual herbs that can adapt to the flood pattern in agreement with results described by Zhang et al (2017); moreover, annuals were more numerous at the lower elevations with perennials at the higher elevations. The similarity of species composition between soil seedbank and above vegetation in the annual community of the lower part was greater than that for the perennial vegetation in the upper part of the drawdown zone.…”

Section: Discussionsupporting

confidence: 67%

“…The similarity of species composition between soil seedbank and above vegetation in the annual community of the lower part was greater than that for the perennial vegetation in the upper part of the drawdown zone. It is well known that the soil seedbank of annuals certainly plays a more important role in the regeneration of the plant community in frequently disturbed areas (Landman et al 2007;Zhang et al 2017). The composition of the seedbanks was separated along the vertical gradient of the drawdown zone, and hence may play an important role in vegetation regeneration after flood/exposure disturbance in the lower drawdown zone (Zhang et al 2016).…”

Section: Discussionmentioning

confidence: 99%

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Vertical and longitudinal variations in plant communities of drawdown zone of a monsoonal riverine reservoir in South Korea

et al. 2019

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Background: The plant communities within reservoir drawdown zones are ecologically important as they provide a range of ecosystem services such as stabilizing the shoreline, improving water quality, enhancing biodiversity, and mitigating climate change. The aim of the study was therefore to identify the major environmental factors affecting these plant communities within the drawdown zone of the Soyangho Reservoir in South Korea, which experiences a monsoonal climate, and thereafter to (1) elucidate the plant species responses and (2) compare the soil seedbank composition along main environmental gradients. Results: Two main environmental gradients affecting the plant community structure were identified within the drawdown zone; these were a vertical and longitudinal gradient. On the vertical dimension, a hydrological gradient of flood/exposure, the annual-dominated plant community near the water edge changed to a perennial-dominated community at the highest elevation. On the longitudinal dimension from the dam to the upstream, plant species composition changed from an upland forest-edge community to a lowland riverine community, and this was correlated with slope degree, soil particle size, and soil moisture content. Simultaneously, the composition of the soil seedbank was separated along the vertical gradient of the drawdown zone, with mainly annuals near the water edge and some perennials at higher elevations. The species composition similarity between the seedbank and extant vegetation was greater in the annual communities at low elevation than in the perennial communities at higher elevation. Conclusions: The structures of plant community and soil seedbank in the drawdown zone of a monsoonal riverine reservoir were changed first along the vertical and secondly along the longitudinal gradients. The soil seedbank could play an important role on the vegetation regeneration after the disturbances of flood/exposure in the drawdown zone. These results indicate that it is important to understand the vertical and longitudinal environmental gradients affecting shoreline plant community structure and the role of soil seedbanks on the rapid vegetation regeneration for conserving and restoring the drawdown zone of a monsoonal reservoir.

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Section: Discussionsupporting

confidence: 67%

Section: Discussionmentioning

confidence: 99%

Vertical and longitudinal variations in plant communities of drawdown zone of a monsoonal riverine reservoir in South Korea

et al. 2019

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“…These changes were observed during the primary reservoir impoundment and further progressed after six cycles of water‐level fluctuation (Lu, Li, Huang, et al, ; Lu, Li, Jiang, et al, ). The degradation of soil seed banks induced the degradation of standing vegetation, which further affected soil seed banks (Zhang et al, ; Zhang, Chen, Wu, et al, ). It is thus possible that the plant community and soil seed bank will continue to change and reach an equilibrium that meets the changing hydrological conditions of the dam.…”

Section: Discussionmentioning

confidence: 99%

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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“…In this paper, the Shannon-Wiener diversity index (SWI) ( Zou et al., 2021 ), Patrick richness index (PRI) ( Courkamp et al., 2022 ), Jaccard similarity index (JCI) ( Zhang et al., 2017 ), and Total seed density (TSD) were used to reflect the diversity of seed banks.…”

Section: Methodsmentioning

confidence: 99%

Diversity of soil seed bank and influencing factors in the nascent wetland of the Yellow River Delta

Zhu,

Fang,

Jia

et al. 2023

Front. Plant Sci.

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Soil seed bank is the growth and reproduction source of vegetation community, playing an important role in vegetation establishment, succession and renewal, biodiversity maintenance. This study has selected the nascent wetland in the Yellow River Delta (YRD) formed in 1996 as study area and investigated the diversity and key influencing factors of soil seed bank diversity. The study results show that: (1) The soil seed bank in the study area has a simple structure, containing relatively few species. A total of five plant species, which belong to four families and five genera, were found in this bank, with Phragmites australis and Suaeda salsa being the dominant plants. (2) All species are herbs without woody species. One herb is annual herb and the others are perennial herbs. (3) From the sea to the river, the changes rules of the overall density and diversity of the seed bank are not obvious. (4) The dispersal distance from salt and freshwater has a significant influence on the density of the soil seed bank but has no significant influence on the diversity. Meanwhile, the soil salt content has a significant negative influence on the diversity of seed banks. (5) Aboveground vegetation did not closely relationship with diversity of soil seed bank. All above results can provide basic data and scientific evidence for the conservation of vegetation communities in the nascent wetlands and vegetation restoration in the degraded wetlands in the YRD.

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The soil seed bank of a rehabilitated draw‐down zone and its similarity to standing vegetation in the Three Gorges Reservoir Area

Cited by 9 publications

References 39 publications

Vertical and longitudinal variations in plant communities of drawdown zone of a monsoonal riverine reservoir in South Korea

Vertical and longitudinal variations in plant communities of drawdown zone of a monsoonal riverine reservoir in South Korea

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

Diversity of soil seed bank and influencing factors in the nascent wetland of the Yellow River Delta

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