Secondary seed dispersal in hydro‐fluctuation belts and its influence on the soil seed bank

2019 ◽  
Vol 35 (4) ◽  
pp. 405-413 ◽  
Author(s):  
Fang‐qing Chen ◽  
Yang Wu ◽  
Miao Zhang ◽  
Yan‐ran Ma ◽  
Zong‐qiang Xie ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Seed Bank ◽  
Soil Seed Bank ◽  
Secondary Seed Dispersal

Timing of seed dispersal and dormancy, rather than persistent soil seed-banks, control seedling recruitment of woody plants in Neotropical savannas

2011 ◽  
Vol 21 (2) ◽  
pp. 103-116 ◽  
Author(s):  
Ana Salazar ◽  
Guillermo Goldstein ◽  
Augusto C. Franco ◽  
Fernando Miralles-Wilhelm
Keyword(s):  
Moisture Content ◽  
Seed Dispersal ◽  
Species Composition ◽  
Seed Bank ◽  
Seedling Recruitment ◽  
Soil Seed Bank ◽  
Woody Species ◽  
Seed Banks ◽  
Soil Seed Banks ◽  
Seedling Bank

AbstractA large fraction of tree species forming persistent soil seed-banks and with dormant seeds are expected to be found in strongly seasonal ecosystems such as Neotropical savannas, where seedling recruitment could be highly variable. In the savannas of Central Brazil, we studied seed characteristics (type of dormancy, longevity and moisture content) of 14 representative woody species differing in seed dispersal season. We also studied the dynamics of soil seed-banks and similarity patterns in woody species composition among seed rain, soil seed-bank, seedling bank and standing vegetation along shallow topographic gradients that differ in canopy cover. Woody species composition of the soil seed-bank largely differed from the standing vegetation, the seed rain and the seedling bank species composition, suggesting low recruitment of woody species from the soil seed-bank. Seeds of the 14 woody species remained viable for less than 16 months in laboratory dry-storage conditions. Of those, most seeds dispersed in the dry season were dormant and exhibited low moisture content, while most seeds dispersed in the wet season were non-dormant and exhibited high moisture content. Longevity of these seeds dispersed in the dry and the wet seasons did not differ significantly. This study shows that both timing of seed dispersal and dormancy appear to control timing of seed germination and seedling recruitment of most Neotropical savanna woody species, which did not form persistent soil seed-banks. This study contributes to the understanding of tree/grass coexistence and tree density variations along topographic gradients in tropical savannas.

Relationships between soil seed bank composition and standing vegetation along chronosequences in a tropical dry forest in north-eastern Brazil

2019 ◽  
Vol 35 (4) ◽  
pp. 173-184 ◽  
Author(s):  
Fernanda Melo Gomes ◽  
Clemir Candeia de Oliveira ◽  
Roberta da Rocha Miranda ◽  
Rafael Carvalho da Costa ◽  
Maria Iracema Bezerra Loiola
Keyword(s):  
Seed Dispersal ◽  
Seed Bank ◽  
Soil Seed Bank ◽  
Seedling Emergence ◽  
Tropical Dry Forest ◽  
Seed Banks ◽  
Dry Forest ◽  
Dry Forests ◽  
High Dispersal ◽  
Standing Vegetation

AbstractTo better understand the role of seed banks in ecological succession of dry forests, we compared similarities between vegetation and seed banks and assessed the relative contributions of seed dispersal and persistence in chronosequences in the Brazilian semi-arid region. To sample the standing vegetation and the seed bank, we collected data in three sites with three successional ages in each one (5 y, 25 y and 45 y). A total of 180 soil samples (three sites × three successional ages × 10 plots × two components) were collected. The composition of the seed bank was assessed by the seedling emergence method. Of 166 species identified in the standing vegetation, only 50 (30.1%) were also present in the seed bank, resulting in low similarity (Jaccard index = 0.02–0.21) and reflecting the rarity of woody species and the dominance of annuals (71% of richness). The relative importance of seed persistence and seed dispersal to seed banks composition were balanced in most cases (difference was not rejected in four out six comparisons). Those results suggest that seed banks in tropical dry forests are largely the result of high dispersal rates and the persistence of allochthonous annual species that contribute to decoupling seed bank and vegetation composition.

Characteristics of Soil Seed Bank of Caragana microphylla Community under the Grazing and Enclosure Conditions in Horqin Sandy Land

2010 ◽  
Vol 26 (5) ◽  
pp. 714-719
Author(s):  
Ming LI ◽  
De-ming JIANG ◽  
Yong-ming LUO ◽  
Xiu-mei WANG ◽  
Bo LIU ◽  
...  
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Horqin Sandy Land ◽  
Sandy Land ◽  
Caragana Microphylla

Community Dynamics and Soil Seed Bank Ecology of Lane Mountain Milkvetch (Astragalus jaegerianus Munz)

2012 ◽  
Author(s):  
T. R. Huggins ◽  
B. A. Prigge ◽  
M. R. Sharifi ◽  
P. W. Rundel
Keyword(s):  
Seed Bank ◽  
Community Dynamics ◽  
Soil Seed Bank

scholarly journals Effects of Wollastonia biflora expansion on the soil seed bank in native forest communities on a tropical coral island

2021 ◽  
Vol 25 ◽  
pp. e01403
Author(s):  
Yao Huang ◽  
Hai Ren ◽  
Jun Wang ◽  
Nan Liu ◽  
Shuguang Jian ◽  
...  
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Native Forest ◽  
Forest Communities ◽  
Tropical Coral ◽  
Coral Island
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