Germination characteristics of soil seed bank in deciduous forest along terrace scarp.

1999 ◽  
Vol 18 ◽  
pp. 265-270
Author(s):  
AKIKO KURIHARA
Keyword(s):  
Seed Bank ◽  
Deciduous Forest ◽  
Soil Seed Bank ◽  
Germination Characteristics

scholarly journals Seed Rain, Soil Seed Bank, and Seedling Emergence Indicate Limited Potential for Self-Recovery in a Highly Disturbed, Tropical, Mixed Deciduous Forest

Plants ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1391
Author(s):  
Anussara Chalermsri ◽  
La-aw Ampornpan ◽  
Witoon Purahong
Keyword(s):  
Mortality Rate ◽  
Seed Bank ◽  
Tree Species ◽  
Deciduous Forest ◽  
Soil Seed Bank ◽  
Seedling Emergence ◽  
Seed Rain ◽  
Reproductive Phenology ◽  
Mixed Deciduous Forest ◽  
Standing Vegetation

Human activity negatively affects the sustainability of forest ecosystems globally. Disturbed forests may or may not recover by themselves in a certain period of time. However, it is still unclear as to what parameters can be used to reasonably predict the potential for self-recovery of human-disturbed forests. Here, we combined seed rain, soil seed bank, and seed emergence experiments to evaluate the potential for self-recovery of a highly disturbed, tropical, mixed deciduous forest in northeastern Thailand. Our results show a limited potential for self-recovery of this forest due to low seedling input and storage and an extremely high mortality rate during the drought period. There were 15 tree species of seedlings present during the regeneration period in comparison with a total number of 56 tree species in current standing vegetation. During the dry season, only four tree seedling species survived, and the highest mortality rate reached 83.87%. We also found that the correspondence between the combined number of species and composition of plant communities obtained from seed rain, soil seed bank, and seedling emergence experiments and the standing vegetation was poor. We clearly show the temporal dynamics of the seed rain and seedling communities, which are driven by different plant reproductive phenology and dispersal mechanisms, and drought coupled with mortality. We conclude that this highly disturbed forest needs a management plan and could not recover by itself in a short period of time. We recommend the use of external seed and seedling supplies and the maintenance of soil water content (i.e., shading) during periods of drought in order to help increase seedling abundances and species richness, and to reduce the mortality rate.

Soil seed bank composition and diversity in a managed temperate deciduous forest

2004 ◽  
Vol 13 (13) ◽  
pp. 2485-2509 ◽  
Author(s):  
Guillaume Decocq ◽  
Bertille Valentin ◽  
Benoit Toussaint ◽  
Frédéric Hendoux ◽  
Robert Saguez ◽  
...  
Keyword(s):  
Seed Bank ◽  
Deciduous Forest ◽  
Soil Seed Bank ◽  
Temperate Deciduous Forest ◽  
Temperate Deciduous

scholarly journals Zróżnicowanie banków nasion w naturalnie i antropogenicznie przekształconych zbiorowiskach leśnych [Diversity of soil seed banks in natural and man-modified forest communities]

2014 ◽  
Vol 88 ◽  
pp. 1-147 ◽  
Author(s):  
Małgorzata Jankowska-Błaszczuk
Keyword(s):  
Human Impact ◽  
Seed Bank ◽  
Deciduous Forest ◽  
Soil Seed Bank ◽  
Seed Banks ◽  
Species Structure ◽  
Herb Layer ◽  
Forest Communities ◽  
Natural Forests ◽  
Soil Seed Banks

The objective of the study was to reveal diversity in species composition and size of soil seed banks derived from forest communities undergoing different intensity of human impact as well as to show the seed bank strategy as an adaptation of species to many kinds of disturbances occurring in natural deciduous forests. On the basis of the study of soil seed bank in natural, stabilised deciduous forest communities in Białowieża National Park and taking into account data from literature it was found that: (1) Densities of seed banks of fertile, undisturbed deciduous forest vary from three to eight thousand seeds per one m<sup>2</sup>. The majority of these seeds (60–80%)come from the herb layer. Persistance of such banks do not exceed a few years. Species which arę dominant in seed bank of such forest are characterized by mean light requirements. The impulses which break their secondary dormancy arę slight disturbances in the herb layer. (2) Species structure of seed bank derived from such forest does not reflect floristic composition of the herb layer because this layer is dominated by species whose survival strategy is connected with vegetative propagation. (3) In seed banks of even very stable forest communities there are species which are absent from the herb layer of the forest. The species need light gaps in trees canopy for establishment. They are very light demanding and persistent in soil. Percentage of these species in soil seed banks grows with the intensity of human impact on forest communities. These species dominate also in seed banks of relatively natural forests but small and surrounded by meadows and fields. Seedlings of these species occur spontanously during the first phase of regeneration of forest gaps. After the canopy close-up, the species disappear from cover vegetation but their numerous and very persistant seeds wait in soil seed bank for the next disturbance.

Germination characteristics and the relationship between population structure, soil seed bank density and fire response in the rare endemic Stachystemon vinosus (Halford & R.J.F.Hend.) (Euphorbiaceae) from southern Western Australia

2019 ◽  
Vol 29 (2) ◽  
pp. 124-134
Author(s):  
Brian J. Vincent ◽  
Sarah Barrett ◽  
Anne Cochrane ◽  
Michael Renton
Keyword(s):  
Population Structure ◽  
Western Australia ◽  
Seed Bank ◽  
Fire Regime ◽  
Soil Seed Bank ◽  
Fire Response ◽  
Germination Characteristics ◽  
In Fire ◽  
Rare Endemic ◽  
The Relationship

AbstractThe regeneration niche defines the specific environmental requirements of the early phases of a plant's life cycle. It is critical for the long-term persistence of plant populations, particularly for obligate seeders that are highly vulnerable to stochastic events in fire-prone ecosystems. Here, we assessed germination characteristics and the relationship between population structure, soil seed bank density and fire response in Stachystemon vinosus (Euphorbiaceae), a rare endemic shrub from Western Australia, from burnt and long unburnt habitats. Many plants in long unburnt habitat were similar in size to those in recently burnt habitat. Soil seed bank density was related to plant abundance and fire history with density lower in burnt than unburnt sites. Thus, inter-fire recruitment may play a critical role in the requirements of the study species. To assess the dormancy status and germination requirements we used a ‘move-along’ experiment with temperatures from six seasonal phases of the year. Seeds were incubated under light and dark conditions, with and without smoked water, and with and without dry after-ripening. Germination was most effective when seeds were treated with smoked water and incubated in the dark at temperatures resembling autumn/winter conditions. After-ripening increased germination in light and dark incubated seeds in the absence of smoked water but was unnecessary for optimal germination in smoked water treated seeds. Irrespective of treatment, seeds showed a requirement for cooler temperatures for germination. These results suggest that rising temperatures and changes in fire regime associated with global warming may alter future germination responses of Stachystemon vinosus.

Soil seed bank characteristics along a gradient of past human disturbances in a tropical semi-deciduous forest: Insights for forest management

2022 ◽  
Vol 503 ◽  
pp. 119744
Author(s):  
Christian Adjalla ◽  
Félicien Tosso ◽  
Kolawolé Valère Salako ◽  
Achille Ephrem Assogbadjo
Keyword(s):  
Forest Management ◽  
Seed Bank ◽  
Deciduous Forest ◽  
Soil Seed Bank ◽  
Human Disturbances

scholarly journals Variability of the soil seed banks in the natural deciduous forest in the Białowieża National Park

2014 ◽  
Vol 67 (3-4) ◽  
pp. 313-324 ◽  
Author(s):  
Małgorzata Jankowska-Błaszczuk
Keyword(s):  
Seed Bank ◽  
Deciduous Forest ◽  
Layer Structure ◽  
Soil Seed Bank ◽  
Seed Banks ◽  
Species Structure ◽  
Herb Layer ◽  
Tree Stand ◽  
Primeval Forest ◽  
Clear Cutting

Using the germination method, the species diversity, density of the soil seed bank and its relation to cover vegetation in a natural deciduous forest with primary and secondary tree stand were compared. It was found that the mean density and species composition of the soil seed bank in the forest with secondary tree stand that has spontaneously been overgrown over the last 90 years after clear-cutting does not differ from the soil seed bank derived from primeval forest (3167M<sup>-2</sup> vs. 3827m<sup>-2</sup>). In both stands there were 46 species altogether and 36 were common and seed banks were dominated by herbs. The most abundant in this group were: <em>Urtica dioica</em>, <em>Chrysosplenium alternifolium</em>, <em>Geranium robertianum</em>, <em>Oxalis acetosella</em>. In both cases it was found that the species structure of the herb layer was similar to that of the seed bank in about 70%. The seed banks of species absent from the herb layer or present there only sporadically were much more abundant. The seedlings of these species constituted more than one third of all seedlings that emerged in the samples from the secondary tree stand and only 5% those from the primary one. The analysis of seed bank in heavily rooted places under primary and secondary tree stands showed that in places with a totally distroyed herb layer the density of the soil seed bank in primeval forest was three times lower than in places with fully developed herb layer structure (102.60±22.61 vs. 307.0±206.5 per sample). This difference under secondary tree stand turned out to be much lower (415.8±137.8 vs. 358.2±126.0 per sample).

Sign in / Sign up

Export Citation Format

Share Document