scholarly journals Plant recruitment from the soil seed bank depends on topsoil stockpile age, height, and storage history in an arid environment

2016 ◽  
Vol 24 ◽  
pp. S53-S61 ◽  
Author(s):  
Peter J. Golos ◽  
Kingsley W. Dixon ◽  
Todd E. Erickson
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Arid Environment ◽  
Plant Recruitment ◽  
And Storage

Fire can promote germination, recruitment and seed bank accumulation of the threatened annual grass Arthraxon hispidus

2020 ◽  
Vol 68 (6) ◽  
pp. 413
Author(s):  
Laura White ◽  
Claudia Catterall ◽  
Kathryn Taffs
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Germination Rate ◽  
Life History Strategies ◽  
North Coast ◽  
Plant Recruitment ◽  
Chemical Mechanisms ◽  
Disturbance Regimes ◽  
Study Population ◽  
Persistent Seed Bank

Disturbance plays an important role in plant life history strategies and has been documented as both enhancing and threatening populations of the vulnerable grass Arthraxon hispidus (Thunb.) Makino (hairy jointgrass) on the NSW north coast. Mechanical disturbance (slashing) is often used in A. hispidus conservation management, but many Australian plants are adapted to fire-based disturbance regimes. In this study we undertook a field burning experiment, along with soil seed bank sampling and germination trials, to explore how fire influences A. hispidus population dynamics in terms of plant recruitment and seed bank fluctuations. We found that winter burning strongly promoted A. hispidus spring germination without entirely depleting the residual seedbank. Although drought affected our field study population, burning also led to increased adult cover and substantial seed bank replenishment the following autumn. Exposure to a smoke treatment almost doubled the germination rate of A. hispidus seeds in nursery trials. Our study suggests that appropriate burning regimes can help to maintain this species in the landscape, by both structural and chemical mechanisms, by enhancing plant recruitment and facilitating seed bank accumulation. However, some A. hispidus plants also successfully germinated, established, and reproduced in unburnt plots during our study, suggesting that populations of this species can persist without disturbance in some habitats, such as native wetland communities. We found that A. hispidus has a multi-year seed longevity and a persistent seed bank, providing the species a degree of resilience in the event of unpredictable disturbance regimes and climatic anomalies.

scholarly journals Necromass as seed reservoir in macroforb meadows with varied moisture conditions

2016 ◽  
Vol 69 (4) ◽  
Author(s):  
Magdalena Franczak ◽  
Bożenna Czarnecka
Keyword(s):  
Seed Bank ◽  
Vegetation Cover ◽  
Soil Seed Bank ◽  
Plant Cover ◽  
Lythrum Salicaria ◽  
Plant Parts ◽  
Dead Plant ◽  
Moisture Conditions ◽  
And Storage

<p>Necromass, i.e., dead plant parts, has a great impact on the spatial patterns of populations and communities. Depending on its thickness and the degree of decomposition, it may constitute a space-blocking physical barrier and impede recruitment of individuals due to, e.g., autotoxication. The aim of the study was to determine the role of the necromass layer in formation of the soil seed bank of variously moist meadow communities and its influence on the efficiency of generative reproduction. The authors paid special attention to the possibility of capture and storage of seeds of species occurring in the vegetation cover by necromass. Additionally, selected features of seeds of species present on the necromass were analyzed in order to identify species that can potentially contribute to formation of the necromass seed bank.</p><p>The plant cover comprised 52 species in total. Seedlings of 21 taxa appeared on the necromass and their number ranged from 10 to 13, depending on the patch. The density of the seedlings ranged from 339 to 4923 m<sup>−2</sup>. In all patches, <em>Lythrum salicaria</em> and <em>Lysimachia vulgaris</em> seedlings were most numerous. These two species were characterized by the highest frequency as well. The low values of Jaccard’s index (0.28–0.36) imply a low share of taxa that are common for the necromass and the vegetation cover. This result should be explained by the occurrence of large disproportions in the number of all species identified on the necromass and among the vegetation. The seeds are typically characterized by small sizes and usually have smooth or finely striated and/or ribbed surface texture. The presence of additional structures, e.g., pappus and hairs, in the largest and heaviest seeds (<em>Crepis paludosa</em>, <em>Geum rivale</em>, and <em>Cirsium</em> spp.) may help seeds capture in the necromass.</p>

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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