Species richness, diversity, density and spatial distribution of soil seed banks in the riparian woodland along the Thamalakane River of the Okavango Delta, northern Botswana

The composition and conservation of plant communities is greatly influenced by the soil seed bank. Information on the soil seed banks and the remaining vegetation in these ecosystems is crucial for guiding the restoration efforts. This study examines the size, species richness, diversity, uniformity, and similarity of soil seed banks and aboveground vegetation in 6 different grazing lands including coastal pasture, reseeded pasture, artificial pasture, lowland shrubland, ungrazed pasture, and hillside shrubland. Forty-eight soil samples were taken by cores with a diameter and depth of 10 cm from each of grazing lands in August of 2007. A vegetation survey was conducted using a 0.5 x 0.5-m quadrant in both the spring and fall. Eighty species were observed in soil seed banks and aboveground vegetation. The largest seed bank was observed in reseeded pasture (7,715 seed/m2), while the smallest seed bank was found in coastal pasture (2,755 seed/m2). Coastal pasture also possessed the least amount of aboveground vegetation (131 plants/m2). The most aboveground vegetation was found in ungrazed pasture (155 plants/m2). The most common species in seed banks were annual and perennial grasses in reseeded pasture, annual forbs in artificial pasture and hillside shrubland, and perennial forbs in low shrubland and ungrazed pasture. Species richness, diversity, and uniformity in seed banks were highest in lowland shrubland and lowest in artificial pasture. The seed bank and aboveground vegetation were similar in ungrazed pasture, coastal pasture, reseeded pasture, low shrubland, hillside shrubland and artificial pasture. Shrublands play an important role in species richness and the number of germinated seeds from seed banks of grazing lands in southern Marmara. The results showed that reseeding or a decrease in grazing pressure may improve the condition of grazing lands.

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Comparison of spatial patterns of soil seed banks between larch plantations and adjacent secondary forests in Northeast China: implication for spatial distribution of larch plantations

Trees ◽

10.1007/s00468-013-0920-y ◽

2013 ◽

Vol 27 (6) ◽

pp. 1747-1754 ◽

Cited By ~ 15

Author(s):

Qiaoling Yan ◽

Jiaojun Zhu ◽

Qun Gang

Keyword(s):

Spatial Distribution ◽

Spatial Patterns ◽

Northeast China ◽

Seed Banks ◽

Secondary Forests ◽

Soil Seed Banks

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Natural vegetation regeneration from soil seed banks in the cultivated edges of Sudd wetlands in Juba, Southern Sudan

East African Journal of Science, Technology and Innovation ◽

10.37425/eajsti.v2i2.214 ◽

2021 ◽

Vol 2 (2) ◽

Author(s):

Josephine Esaete ◽

Augustine Bongo ◽

Thomas Lado ◽

Tomor Bojoi ◽

Henry Busulwa

Keyword(s):

Species Richness ◽

Species Composition ◽

Seed Bank ◽

Natural Regeneration ◽

Soil Seed Bank ◽

Seed Banks ◽

Interquartile Range ◽

Seed Density ◽

Soil Seed Banks ◽

Species Richness And Diversity

Soil seed banks are important for regeneration of degraded wetlands ecosystems. The Sudd wetlands of Juba city have long been encroached for crop cultivation. Seedling germination was monitored in a greenhouse to establish possible natural regeneration in Mindiari, Rejaf and Roton wetlands in the Sudd. Sixty-four species germinated from the soil seed bank of which 12.5% were dominated by Cyperus difformis and Typha capensis. The findings showed that median wetland species richness in Mindiari was 1.5 (interquartile range = 0.75?3.5), Rejaf 2.5 (interquartile range = 1.0 ? 4.0), Roton 3 (interquartile range = 1.0 ? 5.0) while median Shannon-Wiener diversity was 1.5 (1.14 ?1.73), 1.43 (1.01?1.66), 1.15 (0.98?1.67) for Mindiari, Rejaf and Roton respectively. Both the median seed species richness and diversity were not significantly different among the study wetlands. The median of seed density (56.1) was significantly higher in Roton than in Mindiari (36.7) and Rejaf (29.4) wetlands. The NMDS results showed that species composition of Mindiari and Rejaf was different from Roton. It is concluded that growing crops in wetlands did not influence species richness and diversity but it reduced seed density and altered species composition. Although wetland species were not significantly different in the three-wetland categories, dominance of canopy species belonging to Typhaceae and Cyperaceae indicates that these species are resilient to cultivation and could facilitate natural regeneration of cultivated wetlands edges of the Sudd region in Juba. Further research should examine effect of cultivation duration and flooding regimes on soil seed bank species richness, diversity, and density and composition.

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Effects of disturbance and altitude on soil seed banks of tropical montane forests

Journal of Tropical Ecology ◽

10.1017/s0266467413000667 ◽

2013 ◽

Vol 29 (6) ◽

pp. 523-529 ◽

Cited By ~ 7

Author(s):

Denis Lippok ◽

Florian Walter ◽

Isabell Hensen ◽

Stephan G. Beck ◽

Matthias Schleuning

Keyword(s):

Species Richness ◽

Tropical Forests ◽

Species Turnover ◽

Habitat Type ◽

Seed Banks ◽

Seed Density ◽

Forest Fragments ◽

Forest Edges ◽

Soil Seed Banks ◽

Forest Remnants

Abstract:Vast areas of tropical forests have been deforested by human activities, resulting in landscapes comprising forest fragments in matrices of deforested habitats. Soil seed banks (SSB) are essential sources for the regeneration of tropical forests after disturbance. In a fragmented montane landscape in the Bolivian Andes, we investigated SSB in three different habitat types that were associated with different degrees of disturbance, i.e. in forest interior, at forest edges and in deforested habitats. Sampling of habitats was replicated at six sites ranging in altitude from 1950 to 2450 m asl. We extracted seeds from dried soil samples by sieving, classified seeds into morphospecies and size classes, and characterized SSB in terms of density, species richness and composition. We tested effects of disturbance (i.e. habitat type) and altitude on SSB characteristics. Overall, small seeds (<1 mm) dominated SSB (81% of sampled seeds). Seed density and species richness were lowest in deforested habitats, especially in large seeds and distant from adjacent forests (≥20 m), while small-seeded species were most numerous near forest margins. Species turnover between habitats was high. Altitude altered the composition of SSB, but had no effects on seed density and species richness. We conclude that the potential of SSB for natural regeneration of deforested habitats is low and decreases with increasing distance from forest remnants and that forest edges may be eventually invaded by small-seeded species from deforested habitats.

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Species composition and richness of viable seed bank after fire events in Mount Ciremai National Park and Kuningan Botanic Gardens, West Java, Indonesia

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d220652 ◽

2021 ◽

Vol 22 (6) ◽

Author(s):

Indriani Ekasari ◽

Ronggo Sadono ◽

Djoko Marsono ◽

Joko Ridho Witono

Keyword(s):

Species Richness ◽

Species Composition ◽

National Park ◽

Soil Layer ◽

Seed Banks ◽

Soil Samples ◽

Viable Seed ◽

Botanic Gardens ◽

West Java ◽

Soil Seed Banks

Abstract. Ekasari I, Sadono R, Marsono D, Witono JR. 2021. Species composition and richness of viable seed bank after fire events in Mount Ciremai National Park and Kuningan Botanic Gardens, West Java, Indonesia. Biodiversitas 22: 3437-3447. Forest fire is an environmental disaster that can decline ecosystem function and restoration efforts must be considered to restore forest ecosystems after fire events. Natural regeneration using existing soil seed banks is a promising approach in restoration due to its advantage in terms of minimizing cost. This study aimed to examine the species composition and richness of germinable seed banks in several post-fire sites in Mount Ciremai National Park (MNCP) and Kuningan Botanic Gardens (KGB), West Java, Indonesia. One hundred fifty-eight soil samples were collected from the study sites representing fire events (i.e., four post-fire sites and one non-fire site), and soil depths (i.e., upper, middle, and lower). The collection of soil samples and identification of seedlings emergence were conducted from September 2019 to February 2020. Data were analyzed using ANOVA and correspondence analysis using SPSS Version 22. In total, 4626 emergence seedlings were recorded, belonging to 158 species and 58 families in which 41 families in the upper soil layer, 35 families in the middle soil layer, and 33 families in the lower soil layer. The results showed that Poaceae, Asteraceae, and Euphorbiaceae as the most dominant families. The upper soil layer of post-fire site 2018 had the highest species richness (R=11.98), while the lower soil layer of post-fire site 2012 had the lowest species richness (R=2.64). Our findings suggest that when carrying out restoration activities in post-fire areas, it is preferable to use native species that do not compete with species persisted in soil seed banks.

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The Changes of Soil Seed Banks In Time Series Before And After The Invasive Artemisia Trifida Was Removed From Grassland

10.21203/rs.3.rs-504715/v1 ◽

2021 ◽

Author(s):

Hanyue Wang ◽

Tong Liu ◽

Hegan Dong ◽

Wenxuan Zhao ◽

Xuelian Liu ◽

...

Keyword(s):

Species Richness ◽

Seed Bank ◽

Seed Banks ◽

Distribution Area ◽

Native Community ◽

Invasive Weed ◽

Soil Seed Banks ◽

Native Seed ◽

Giant Ragweed ◽

Species Specific

Abstract Artemisia trifida (giant ragweed) is an invasive weed with an expanding distribution area. In recent years it has been found to invade grasslands, bringing great challenges for effective weed control and restoration of native herbage. Although it has been reported that plant invasion can cause a decline in species richness and biodiversity in native seed banks, which may eventually lead to the depletion of native seed banks, few location- and species-specific case studies have been conducted regarding the dynamic characteristics of the invaded seed banks from invasion back to restoration. The purpose of this study was to compare and quantify the seed banks of grassland communities after (1) giant ragweed invasion for 0-8 years, and (2) giant ragweed removal, in Yili Valley, Xinjiang, China. The results showed that the duration of invasion determined whether giant ragweed could pose a significant threat to the native community seed bank. The seed bank density of native community had significantly decreased by 30.44% after 4 years of invasion, and in the sixth year, the species richness in the seed bank had decreased significantly by 12.36%. After the invasion had lasted for eight years, the seed bank density of the native community had decreased by 83.28%, the species richness in the seed bank decreased by 39.33%, and the seed bank tended to be homogeneous. After the giant ragweed was removed, the potential for restoration was limited by the residual seed bank. Three years after the restoration, although the density of seed banks increased significantly, new growth was dominated by weedy species, rather than crucial components of the grassland habitat. This study is of great significance to the control of giant ragweed and the restoration of grassland vegetation invaded by giant ragweed.

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Effects of Different Dune Positions and Microbiotic Crusts on Soil Seed Banks in the Gurbantonggut Desert

Arid Zone Research ◽

10.3724/sp.j.1148.2008.00107 ◽

2008 ◽

Vol 25 (1) ◽

pp. 107-113

Author(s):

Rong-yi CHEN

Keyword(s):

Seed Banks ◽

Soil Seed Banks ◽

Microbiotic Crusts

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Classification of Post-Fire Responses of Woody Plants to include Pyrophobic Communities

Fire ◽

10.3390/fire3020015 ◽

2020 ◽

Vol 3 (2) ◽

pp. 15 ◽

Cited By ~ 1

Author(s):

Lynda D. Prior ◽

David M. J. S. Bowman

Keyword(s):

Woody Plants ◽

Seed Banks ◽

Classification Systems ◽

Woody Vegetation ◽

General Category ◽

Conifer Species ◽

Soil Seed Banks ◽

Obligate Seeder ◽

In Fire

Developing standardised classification of post-fire responses is essential for globally consistent comparisons of woody vegetation communities. Existing classification systems are based on responses of species growing in fire-prone environments. To accommodate species that occur in rarely burnt environments, we have suggested some important points of clarification to earlier schemes categorizing post-fire responses. We have illustrated this approach using several Australasian conifer species as examples of pyrophobic species. In particular, we suggest using the term “obligate seeder” for the general category of plants that rely on seed to reproduce, and qualifying this to “post-fire obligate seeder” for the narrower category of species with populations that recover from canopy fire only by seeding; the species are typically fire-cued, with large aerial or soil seed banks that germinate profusely following a fire, and grow and reproduce rapidly in order to renew the seed bank before the next fire.

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