scholarly journals The pattern of seed banks during secondary succession on poor soils

2011 ◽  
Vol 80 (4) ◽  
pp. 269-274 ◽  
Author(s):  
Anna J. Kwiatkowska-Falińska ◽  
Małgorzata Jankowska-Błaszczuk ◽  
Maciej Wódkiewicz
Keyword(s):  
Seedling Emergence ◽  
Coniferous Forest ◽  
Species Abundance ◽  
Calluna Vulgaris ◽  
Seed Banks ◽  
Fallow Land ◽  
Soil Seed Banks ◽  
Number Of Species ◽  
Fallow Lands ◽  
Seedling Emergence Method

Studies on the soil seed banks of fallow lands of different ages were carried out on poor soil abandoned fields and in a fresh coniferous forest in north-eastern Poland. The size and diversity of seed banks was studied with the seedling emergence method. Species abundance (<em><strong>i</strong></em>), density (<em><strong>ii</strong></em>), number of species from different biological groups (<em><strong>iii</strong></em>) and distribution and mean <em>LI</em> value (<em><strong>iv</strong></em>) were analysed as the function of fallow land age. It was found that: (<em><strong>i</strong></em>) species diversity, number of species and ln of density are linear declining function of the fallow land age; (<em><strong>ii</strong></em>) for approx. 25 years the share of diaspores of identified species groups has been relatively similar. Seed banks of 40-50-year-old fallow lands are dominated by <em>Calluna vulgaris</em>, while the seed bank of the old fresh coniferous forest is dominated by dicotyledonous perennials and grasses; (<em><strong>iii</strong></em>) within the first 50 years of succession the persistence of seed banks measured by the Longevity Index increases gradually.

scholarly journals The effects of different types of woodstand disturbance on the persistence of soil seed banks

2011 ◽  
Vol 80 (2) ◽  
pp. 149-157 ◽  
Author(s):  
Anna J. Kwiatkowska-Falińska ◽  
Dorota Panufnik-Mędrzycka ◽  
Maciej Wódkiewicz ◽  
Izabela Sondej ◽  
Bogdan Jaroszewicz
Keyword(s):  
Seed Bank ◽  
Seedling Emergence ◽  
Species Abundance ◽  
Canopy Cover ◽  
Seed Banks ◽  
Ground Vegetation ◽  
Average Weight ◽  
Soil Seed Banks ◽  
Seedling Emergence Method ◽  
Seed Fall

The research was conducted on four patches of thermophilous oak wood in Białowieża Primeval Forest: A – with a woodstand: oak + approx. 30-year-old hornbeam + hornbeam brushwood; B – with a hornbeam stand formed by natural seed fall after logging (ca. 1920) oaks; C – after logging oaks and replanted (ca. 1965) with pine and oak; D – with a natural low-density oak stand. Species composition and seed bank density were estimated using the seedling emergence method. Seedling emergence was observed over two vegetation seasons. Research demonstrated that: 1) the species abundance of the seed banks depends on canopy cover (A, B approx. 50 species; C, D approx. 70 species); 2) the floristical similarity (Sørensen's index) of the seed bank and ground vegetation is higher in the undisturbed patch D (0.50) than in disturbed patches (0.30-0.35); 3) species diversity in plots A, B, C, D (H'=12.5; 13.4; 15.5; 16.9) and seed bank density per m<sup>2</sup> (432.5; 958.0; 1486.5; 2268.0) are negatively correlated with the degree of patch shading; 4) the average weight of diaspores in the seed banks of shady plots is lower (A, B approx. 0.003 g) than that of sunny plots (C, D approx. 0.08 g); 5) the share of long-lived diaspores increases in patches after logging.

Seedling establishment from seeds and seed banks in forests under long-term pollution stress: a potential for vegetation recovery

1994 ◽  
Vol 72 (2) ◽  
pp. 143-149 ◽  
Author(s):  
M. Komulainen ◽  
M. Vieno ◽  
V. T. Yarmishko ◽  
T. D. Daletskaja ◽  
E. A. Maznaja
Keyword(s):  
Seed Germination ◽  
Seed Bank ◽  
Coniferous Forest ◽  
Calluna Vulgaris ◽  
Seed Banks ◽  
Pollution Source ◽  
Average Density ◽  
Vegetation Recovery ◽  
Ground Vegetation ◽  
Empetrum Nigrum

Seed germinability of some common dwarf shrubs and seed-bank composition were studied in young pine forests along a pollution gradient from Severonickel smelter in Monchegorsk, northern Russia. Samples for seed germination and seed-bank trials were taken from sites representing different zones of pollution. Generally, germinability of dwarf shrub seeds was not affected by distance from pollution source, except for Empetrum nigrum ssp. hermaphroditium. The average density per site of seedlings that emerged from seed-bank samples varied between 278 and 416 seedlings/m2. Empetrum nigrum ssp. hermaphroditum and Betula sp. dominated in seed banks. Calluna vulgaris was also numerous at one site. As a whole, seed-bank taxa were well represented in the above ground vegetation. There were no significant differences in seedling density between sites for dominant taxa. Our results indicate that seeds can retain viability even under a heavy pollution load and thus form a potential for vegetation recovery in polluted sites. Key words: seed germination, seed bank, recovery, pollution, coniferous forest.

Seedling emergence of hummock grasses in relation to the effects of fire.

1990 ◽  
Vol 12 (1) ◽  
pp. 25 ◽  
Author(s):  
A Bogusiak ◽  
B Rice ◽  
M Westoby ◽  
MH Friedel
Keyword(s):  
Seed Germination ◽  
National Park ◽  
Seedling Emergence ◽  
Seed Banks ◽  
Rainfall Event ◽  
Grass Species ◽  
Soil Seed Banks ◽  
Subsequent Regeneration

The ecology of hummock-grass vegetation involves recurring fires. The hypothesis was tested that soil seed banks of hummock grass species are stimulated to germinate by the heat of fire or by ash addition. Hummocks of Plectrachne schinzii Henr., Triodia basedowii E. Pritz., and Triodia pungens R. Br. were burned, removed, or removed with the ash returned, and subsequent regeneration was recorded, in Ulum National Park. Regeneration of hummock grass was by seedlings only. Seedling emergence averaged 5/m2, with no differences between treatments or hummock grass species. This indicates the heat of fires and ash addition may not be important in stimulating seed germination of these hummock grass populations. Gemination was distributed over more than one rainfall event following the treatments.

Soil seed banks in a mature coniferous forest landscape: dominance of native perennials and low spatial variability

2012 ◽  
Vol 22 (3) ◽  
pp. 207-217 ◽  
Author(s):  
Scott R. Abella ◽  
Judith D. Springer
Keyword(s):  
Seed Bank ◽  
Vegetation Cover ◽  
Environmental Variables ◽  
Coniferous Forest ◽  
High Elevation ◽  
Seed Banks ◽  
Forest Community ◽  
Forest Landscape ◽  
Soil Seed Banks ◽  
Community Types

AbstractSoil seed banks are important to vegetation recruitment, ecosystem functioning and land management. We evaluated composition of 0–5 cm soil seed banks and relationships of seed banks with forest community types (ranging from low-elevation pinyon–juniper to high-elevation bristlecone pine), vegetation cover and environmental variables within a 40,000-ha relatively undisturbed coniferous forest landscape in Nevada, USA. We collected samples from 36 sites and used the emergence method to assay seed banks. Seed density averaged 479 seeds m− 2across sites and a total of 39 taxa were detected. Most (79%) of these taxa were perennials and 35 of 39 (90%) were native. Moreover, 62% of seed-bank taxa were in the vegetation of mature forests, an uncommon finding in studies of forest soil seed banks. Seed-bank density, species richness and composition did not display strong relationships with forest community types, vegetation cover or environmental variables. Weak relationships likely arose from the relatively uniform seed-bank density among sites, where 50% of sites had seed densities in the range of 106–282 m− 2. Results suggest that while seed banks on this landscape are not large, they provide recruitment potential for some native perennial species of mature, relatively undisturbed communities.

scholarly journals Composition of native and alien invasive species in soil seed banks of five different physiognomies in Akure Forest Reserve, Ondo State, Nigeria

2021 ◽  
Vol 15 (2) ◽  
pp. 437-451
Author(s):  
Ayomiposi Olayinka Akinkuolie ◽  
Rafiu Olugbenga Sanni ◽  
Augustine. O. Isichei ◽  
Samson. O. Oke
Keyword(s):  
Invasive Species ◽  
Seed Bank ◽  
Seedling Emergence ◽  
Seed Banks ◽  
Plant Ecology ◽  
Alien Invasive Species ◽  
Forest Reserve ◽  
Soil Seed Banks ◽  
Significant Difference ◽  
Ondo State

The study investigated the composition of native and alien invasive species in soil seed banks of five different vegetation physiognomies in Akure Forest Reserve Ondo State, Nigeria. This was done with a view to determining and providing an insight into the population dynamics of alien, invasive species for subsequent prediction of potential plant population of the extant population. Five distinct sites (Natural forest, Teak plantation, Taungya system, Taungya + Teak + Gmelina and Teak + Gmelina + Pinus Plantation) designated as A, B, C, D and E were selected in the Forest Reserve. Two plots 25 m x 25 m each were selected for sampling in each of the five distinct physiognomies. Five replicates soil samples were randomly collected at 0-15 cm soil depth in dry and rainy seasons in each site and they were subjected to seedlings emergence for six months to determine the density and species composition (natives or aliens and percentage contribution) of the seed bank. The results of the seedling emergence revealed that the seed bank was dominated by herbaceous stems and also the proportion of aliens to natives was low. Analysis of variance revealed that there was no significant difference (P>0.05) in the density of both the aliens and native species in sites A, B and C indicating similarities in the seed bank density of the aliens and natives in the three sites while in sites D and E, there was a significant difference (P<0.05) indicating dissimilarity in the seed bank density of the aliens and natives in the two sites.Keywords: Plant Ecology, Forest, Seedling Emergence, Seed Bank, Alien Species, Conservation.

scholarly journals Comparison of seedling emergence and seed extraction techniques for estimating the composition of soil seed banks

2010 ◽  
Vol 1 (2) ◽  
pp. 151-157 ◽  
Author(s):  
Jodi N. Price ◽  
Boyd R. Wright ◽  
Caroline L. Gross ◽  
Wal R. D. B. Whalley
Keyword(s):  
Seedling Emergence ◽  
Seed Banks ◽  
Extraction Techniques ◽  
Soil Seed Banks ◽  
Seed Extraction

Persistence of bellyache bush (Jatropha gossypifolia L.) soil seed banks

2012 ◽  
Vol 34 (4) ◽  
pp. 429 ◽  
Author(s):  
Faiz F. Bebawi ◽  
Shane D. Campbell ◽  
Robert J. Mayer
Keyword(s):  
Abiotic Factors ◽  
Seedling Emergence ◽  
Seed Banks ◽  
Burial Depth ◽  
Seed Type ◽  
Natural Rate ◽  
Soil Seed Banks ◽  
Natural Rainfall ◽  
Jatropha Gossypifolia ◽  
Heavy Clay

Bellyache bush (Jatropha gossypifolia L.) is an invasive shrub that adversely impacts agricultural and natural systems of northern Australia. While several techniques are available to control bellyache bush, depletion of soil seed banks is central to its management. A 10-year study determined the persistence of intact and ant-discarded bellyache bush seeds buried in shade cloth packets at six depths (ranging from 0 to 40 cm) under both natural rainfall and rainfall-excluded conditions. A second study monitored changes in seedling emergence over time, to provide an indication of the natural rate of seed bank depletion at two sites (rocky and heavy clay) following the physical removal of all bellyache bush plants. Persistence of seed in the burial trial varied depending on seed type, rainfall conditions and burial depth. No viable seeds of bellyache bush remained after 72 months irrespective of seed type under natural rainfall conditions. When rainfall was excluded seeds persisted for much longer, with a small portion (0.4%) of ant-discarded seeds still viable after 120 months. Seed persistence was prolonged (>96 months to decline to <1% viability) at all burial depths under rainfall-excluded conditions. In contrast, under natural rainfall, surface located seeds took twice as long (70 months) to decline to 1% viability compared with buried seeds (35 months). No seedling emergence was observed after 58 months and 36 months at the rocky and heavy clay soil sites, respectively. These results suggest that the required duration of control programs on bellyache bush may vary due to the effect of biotic and abiotic factors on persistence of soil seed banks.

scholarly journals Seedling Emergence from Seed Banks in Ludwigia hexapetala-Invaded Wetlands: Implications for Restoration

Plants ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 451 ◽  
Author(s):  
Brenda J. Grewell ◽  
Morgane B. Gillard ◽  
Caryn J. Futrell ◽  
Jesús M. Castillo
Keyword(s):  
Plant Species ◽  
Seed Bank ◽  
Seedling Emergence ◽  
Critical Role ◽  
Seed Banks ◽  
Plant Management ◽  
Invasive Plant Management ◽  
Soil Seed Banks ◽  
Restoration Planning ◽  
Standing Vegetation

Soil seed banks play a critical role in the maintenance of wetland plant communities and contribute to revegetation following disturbances. Analysis of the seed bank can therefore inform restoration planning and management. Emergence from seed banks may vary in response to hydrologic conditions and sediment disturbances. To assess the community-level impact of exotic Ludwigia hexapetala on soil seed banks, we compared differences in species composition of standing vegetation among invaded and non-invaded wetlands and the degree of similarity between vegetation and soil seed banks in northern California. To determine potential seed bank recruitment of L. hexapetala and associated plant species, we conducted a seedling emergence assay in response to inundation regime (drawdown vs. flooded) and sediment depth (surface vs. buried). Plant species richness, evenness, and Shannon’s H’ diversity were substantially lower in standing vegetation at L. hexapetala invaded sites as compared to non-invaded sites. Over 12 months, 69 plant taxa germinated from the seed banks, including L. hexapetala and several other exotic taxa. Seedling density varied among sites, being the highest (10,500 seedlings m−2) in surface sediments from non-invaded sites subjected to drawdown treatments. These results signal the need for invasive plant management strategies to deplete undesirable seed banks for restoration success.

scholarly journals Seedling emergence in Chenopodium album and the predictive value of soil seed banks

1994 ◽  
Vol 47 ◽  
pp. 1-5
Author(s):  
G.W. Bourdot ◽  
G.A. Hurrell ◽  
A. Rahman ◽  
R. Abernethy ◽  
N. Grbavac
Keyword(s):  
Predictive Value ◽  
Chenopodium Album ◽  
Seedling Emergence ◽  
Seed Banks ◽  
Soil Seed Banks
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