Mound‐building ants increase the proportion of Gramineae in above‐ground vegetation and the soil seed bank in alpine meadows

2020 ◽  
Vol 31 (5) ◽  
pp. 867-876
Author(s):  
Min Zhao ◽  
Yingwen Yu ◽  
Ying Shi ◽  
Xiaoming Mou ◽  
Allan Degen
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Ground Vegetation ◽  
Alpine Meadows

RELATIONSHIPS BETWEEN SOIL SEED BANK AND VEGETATION DIVERSITY ON DIFFERENT GRAZING PRESSURE

2015 ◽  
Vol 13 (2) ◽  
pp. 105-113
Author(s):  
Gantuya Jargalsaikhan
Keyword(s):  
Species Composition ◽  
Seed Bank ◽  
Soil Seed Bank ◽  
Grazing Pressure ◽  
Ground Vegetation ◽  
Agrostis Capillaris ◽  
Vegetation Diversity ◽  
Significant Difference ◽  
Bistorta Vivipara

In a case study, the main objective was to compare three sites with different grazing pressures in Hvitarsida, W-Iceland in relation to current vegetation, seed bank composition and the correlation between those. Our results show that there were significant difference in species composition in above and belowground, giving very little similarity in species composition between seed bank and current vegetation composition. The only exceptions were Agrostis capillaris and Bistorta vivipara that had close similarity between current aboveground vegetation and soil seed bank. Agrostis capillaris had a great abundance in all the sites and Bistorta vivipara proliferates mostly with bulbils that most likely were numerous in the soil. The results of our study agree with current theories on seed bank composition and similar studies,that the similarity between current above ground vegetation and soil seed bank depends on current dominant species (annual or perennial)and the productivity (high or low) of the site.Mongolian Journal of Agricultural Sciences Vol.13(2) 2014: 105-113

The soil seed bank of a montane meadow: consequences of conifer encroachment and implications for restoration

2007 ◽  
Vol 85 (6) ◽  
pp. 557-569 ◽  
Author(s):  
Nicole L. Lang ◽  
Charles B. Halpern
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Ground Vegetation ◽  
Forest Age ◽  
Conifer Encroachment ◽  
Young Forest ◽  
Carex Pensylvanica ◽  
Montane Meadow ◽  
Forest Age Structure ◽  
Meadow Species

We examined changes in the soil seed bank associated with conifer encroachment of montane meadows in the western Cascade Range of Oregon. We asked whether, and over what period of time, meadow species maintain viable seeds in the soil, and by implication, whether the seed bank can contribute to restoration if conifers are removed. Seed bank composition, ground vegetation, and forest age structure were quantified for 209 samples representing a chronosequence of open meadow, young forest (<75 years), and old forest (95 to >200 years). The seed bank was substantial (44 taxa and 2332 germinants/m2), but dominated by native ruderals (16 species comprising 71% of germinants). Greater than 70% of meadow species were absent from the seed bank. Thirteen meadow species accounted for 21% of all germinants, but most of these were the dominant sedge, Carex pensylvanica Lam.. Seed density, richness, and composition showed weak relationships to forest age, and little resemblance to the ground vegetation, which changed markedly with forest development. Our results suggest that there is limited potential for recovery of most meadow species via the seed bank. Natural reestablishment of these species will require seed dispersal or gradual vegetative spread from existing openings, but competitive interactions with ruderal or forest species may limit recruitment or recovery.

scholarly journals Species shifts in above-ground vegetation and the soil seed bank in the inter-dune lowlands of an active dune field in Inner Mongolia, China

2015 ◽  
Vol 16 (6) ◽  
pp. 490-499 ◽  
Author(s):  
Yong-Cui Wang ◽  
Mark K.J. Ooi ◽  
Guo-Hua Ren ◽  
De-Ming Jiang ◽  
Ala Musa ◽  
...  
Keyword(s):  
Seed Bank ◽  
Inner Mongolia ◽  
Soil Seed Bank ◽  
Ground Vegetation ◽  
Dune Field ◽  
Species Shifts

scholarly journals The seed bank in <i>Pinus</i> stand regeneration in NW Spain after wildfire

Web Ecology ◽  
2001 ◽  
Vol 2 (1) ◽  
pp. 22-31 ◽  
Author(s):  
L. Valbuena ◽  
R. Nuñez ◽  
L. Calvo
Keyword(s):  
Pinus Sylvestris ◽  
Seed Bank ◽  
Soil Seed Bank ◽  
Ground Vegetation ◽  
Nw Spain ◽  
Dispersion Mechanism ◽  
Regeneration Mechanism ◽  
Species Groups ◽  
Quantitative Importance

Abstract. In the Cantabrian area (northwest Spain) Pinus stands occupy many of the original shrub communities that have been considered unproductive. These Pinus stands represent the vegetation which is most affected by fire. Regeneration after fire may occur in different ways: by resprouting or by germination or both. Germination was the only regeneration mechanism in Pinus species that appeared in these areas. The aim of this study is to determine the role of the soil seed bank in regeneration in this type of ecosystem. In order to carry out the study, three communities dominated by Pinus sylvestris which had suffered wildfires were chosen. In each of the three experimental sites of Pinus sylvestris stands the seed bank composition and above-ground vegetation were studied. The results allowed three species groups in the seed bank to be differentiated: those favoured by fire, amongst which some hardseeds, mainly belonging to Cistaceae and Leguminosae, were found; another group formed by outsider or opportunist species from outside the community and which used anemochory as their main dispersion mechanism; and the third group formed by those negatively affected, amongst which were species using vegetative resprout as the main regeneration mechanism. The species of greatest quantitative importance in the seed bank was Erica australis. In general, anemochorous species were predominant in the soil seed bank. During the first stages of succession chamaephytes were dominant and in the two years after fire therophytes were. No great similarity was observed between the bank composition and field vegetation from a qualitative viewpoint, due to differences in the presence of seeds of outsider plants in the bank and to the significance of the resprouting species in the field.

The Study on Key Factors of Soil Seed Bank in Vegetation Restoration

2014 ◽  
Vol 675-677 ◽  
pp. 1146-1150
Author(s):  
Meng Xuan He ◽  
Hong Yuan Li
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Engineering Application ◽  
Wiener Index ◽  
Vegetation Restoration ◽  
Ground Vegetation ◽  
Range Analysis ◽  
Soil Thickness ◽  
The Stability ◽  
Genetic Pool

The soil seed bank (SSB) is regarded as “potential genetic pool” of ground vegetation, which has functions of recalling vegetation history.In practical vegetation restoration engineering,the transplantation of alien species is the most popular method,which will influence the stability of ecological system.The soil seed bank has the advantage ofnatural regeneration,so it will become new afforestation materials.In order to enhance the feasibility of engineering application, orthogonal tests were set with three factors (the top soil thickness, the covering thickness and the number of adding seeds) and three levels.The results showed that:1) compared with blank tests,the orthogonal testshad improved species richness and density of soil seed bank significantly.2) the differences between nine plots in the number of germinated seedlings were very obvious,but in the number of arbor seedlings were not obvious.3)Overall,the Shannon-Wiener index, Simpson index and Pielou index were not high,the distribution of diversity indexes between nine plots was very even,the effect of three factors in the orthogonal testwas not obvious.4)The dominant factors of all the three factors was the topsoil thickness,for it determined the number of contained active seedsdirectly,but the specific influenceshould be determined by range analysis.

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