Standing vegetation as a coarse biotic filter for seed bank dynamics: Effects of gap creation on seed inputs and outputs in a native grassland

2020 ◽  
Vol 31 (6) ◽  
pp. 1006-1016 ◽  
Author(s):  
Charlotte Brown ◽  
James F. Cahill
Keyword(s):  
Seed Bank ◽  
Native Grassland ◽  
Seed Bank Dynamics ◽  
Standing Vegetation ◽  
Gap Creation ◽  
Inputs And Outputs

scholarly journals Spatial and temporal dynamics of two cacti seed banks in a xerophytic shrubland in Mexico City

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Itzel Guzmán-Vázquez ◽  
Silvia Castillo-Argüero ◽  
Alma Orozco-Segovia ◽  
Margarita Collazo-Ortega
Keyword(s):  
Mexico City ◽  
Seed Bank ◽  
Temporal Dynamics ◽  
Seed Banks ◽  
Spatial And Temporal Dynamics ◽  
Seed Bank Dynamics ◽  
Viable Seeds ◽  
Seed Dynamics ◽  
Secondary Seed Dispersal ◽  
Inputs And Outputs

Background: Soil and aerial seed banks directly affect recruitment in plant populations. Soil banks result as the balance between seed inputs and outputs. Seed bank dynamics vary by species and environmental conditions. Few records on cacti seed banks are available. Questions: What types of seed banks do two cacti genera form in a lava-field reserve? Does seasonality influence the seed bank dynamics? Are inputs and outputs associated to the microenvironment? Studied species: Opuntia tomentosa, O. lassiacantha, Mammillaria haageana subsp. san-angelensis, M. magnimamma. Study site and dates: Xerophytic shrubland in the “Reserva Ecológica del Pedregal de San Ángel” in Mexico City. 2016 to 2018. Methods: We collected soil samples from four microenvironments during the rainy and the dry seasons, searched for seeds and tested their viability. We compared the number of inputs, outputs and viable seed by microenvironment and season. For M. magnimamma, each month we registered fruit maturation and searched for seeds remaining between tubercles. Results: Opuntia seed bank inputs occurred in all microenvironments and in both seasons. Rain favored inputs in hollows by secondary seed dispersal. We registered a large number of outputs caused by germination, granivory and loss of viability. Opuntia seed bank was developed in headland, plain and slope. No Mammillaria seed inputs were found, neither an aerial bank in M. magnimamma. Conclusion: Opuntia seed banks were restricted to microenvironments that provided “safe sites” which stored viable seeds. Mammillaria seed dynamics may hinders recruitment for their populations.

scholarly journals Soil Seed Bank Dynamics of a Riparian Forest and its Adjacent Upland Vegetation

2016 ◽  
Vol 8 (1) ◽  
pp. 118-124
Author(s):  
Omowumi Omotoyosi OLALOYE ◽  
Samson Olajide OKE
Keyword(s):  
Species Composition ◽  
Seed Bank ◽  
Riparian Forest ◽  
Soil Seed Bank ◽  
Seedling Emergence ◽  
Vegetation Types ◽  
Soil Seed Banks ◽  
Seed Bank Dynamics ◽  
Standing Vegetation ◽  
Lower Depth

The present study was conducted to determine the densities and soil seed bank composition of a riparian forest and its adjacent upland vegetation for a better understanding the potentials of the soil seed banks in facilitating succession towards a more natural forest of native tree species. Three contiguous 20 m x 20 m plots were systematically established on both riparian forest and upland vegetation. Species enumeration, identification and distribution into families of the standing vegetation were carried out. Furthermore, five replicates soil samples were collected at two different depths (0-15 cm, 15-30 .The seedling emergence test was carried out for six months in the greenhouse to determine the species composition and the density of the seed in both vegetation types. The results of the seedling emergence revealed that more seeds were deposited at the upper depth (0-15 cm) than the lower depth 15-30 cm in the two vegetation types in both dry and rainy season. There was low similarity in species composition between the standing vegetation and soil seed bank in each of the two vegetation types. Herbaceous species recorded the highest number of seedlings as compared to the other habit. The low similarity between seed bank and standing vegetation of the riparian forest and the adjacent upland vegetation suggested that soil seed bank was insignificant in their restoration. 

Seed bank dynamics of the annual halophyte Salicornia ramosissima: towards a sustainable exploitation of its wild populations

Plant Ecology ◽  
2021 ◽  
Vol 222 (5) ◽  
pp. 647-657
Author(s):  
Alejandro Polo ◽  
Alba Fragoso ◽  
María D. Infante-Izquierdo ◽  
Francisco J. J. Nieva ◽  
Adolfo F. Muñoz-Rodríguez ◽  
...  
Keyword(s):  
Seed Bank ◽  
Wild Populations ◽  
Sustainable Exploitation ◽  
Seed Bank Dynamics ◽  
Salicornia Ramosissima

scholarly journals Climate and rapid local adaptation as drivers of germination and seed bank dynamics ofAlliaria petiolata(garlic mustard) in North America

2017 ◽  
Vol 105 (6) ◽  
pp. 1485-1495 ◽  
Author(s):  
Bernd Blossey ◽  
Victoria Nuzzo ◽  
Andrea Dávalos
Keyword(s):  
North America ◽  
Local Adaptation ◽  
Seed Bank ◽  
Garlic Mustard ◽  
Seed Bank Dynamics

scholarly journals Seed bank dynamics in five Panamanian forests

2005 ◽  
Vol 21 (2) ◽  
pp. 223-226 ◽  
Author(s):  
D. A. Fornara ◽  
J. W. Dalling
Keyword(s):  
Seed Bank ◽  
Seedling Recruitment ◽  
Fruit Production ◽  
Pioneer Species ◽  
Seasonal Fluctuations ◽  
Annual Fluctuation ◽  
Soil Seed Banks ◽  
Successful Recruitment ◽  
Seed Bank Dynamics ◽  
Lowland Forests

Many tropical pioneer species depend on the presence of high seed densities in the soil for successful recruitment following canopy disturbance (Cheke et al. 1979, Dalling & Hubbell 2002, Guevara Sada & Gómez Pompa 1972, Whitmore 1983). However determinants of variation in the composition and abundance of soil seed banks remain poorly understood. Seed bank densities can be affected by rates of seed predation and pathogen infection on the surface and in the soil, by intrinsic rates of loss in viability following dispersal, and by variation in the timing and duration of fruit production (Dalling et al. 1997, Garwood 1983, Murray & Garcia 2002). Here we compare seasonal fluctuations in seed bank density in five Panamanian forests varying in elevation and seasonality of precipitation (Table 1). We predict that lowland forests should show stronger intra-annual fluctuation in seed bank densities than montane forests because seed production and loss rates should be higher under conditions of greater resource availability, and where consistent high temperatures support greater abundance or activity of seed predators and pathogens (Brühl et al. 1999). Secondly, among lowland sites, we predict greater fluctuations in seed bank densities at drier, more seasonal sites where seasonally favourable conditions for seedling recruitment may select for interspecific synchrony in fruit production (Daubenmire 1972, Garwood 1983).

Seed bank dynamics and tree‐fall gaps in a northwestern MexicanQuercus‐Pinusforest

2004 ◽  
Vol 15 (5) ◽  
pp. 661-668
Author(s):  
Laura Arriaga ◽  
Carmen Mercado
Keyword(s):  
Seed Bank ◽  
Seed Bank Dynamics

scholarly journals Vegetation and seed bank dynamics highlight the importance of post-restoration management in sown grasslands

2020 ◽  
Author(s):  
Orsolya Valkó ◽  
Balázs Deák ◽  
Péter Török ◽  
Katalin Tóth ◽  
Réka Kiss ◽  
...  
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Rapid Development ◽  
Management Plan ◽  
Landscape Scale ◽  
List Type ◽  
Restoration Management ◽  
Seed Bank Dynamics ◽  
Term Management

AbstractSowing grass seeds generally supports the rapid development of a closed perennial vegetation, which makes the method universally suitable for fast and effective landscape-scale restoration of grasslands. However, sustaining the recovered grasslands, and increasing their diversity is a challenging task. Understanding the role of seed bank compositional changes and vegetation dynamics contributes to designating management regimes that support the establishment of target species and suppress weeds. Our aim was to reveal the effect of post-restoration management on the vegetation and seed bank dynamics in grasslands restored in one of the largest European landscape-scale restoration projects. Eight years after restoration we sampled the vegetation and seed bank in a total of 96 plots located in 12 recovered grasslands in the Great Hungarian Plain. In each recovered grassland stand we designated a mown (mown from Year 1 to Year 8) and an abandoned sample site (mown from Year 1 to Year 3 then abandoned from Year 4 to Year 8). Mown and abandoned sites showed divergent vegetation and seed bank development. Abandonment led to the decline of sown grasses and higher cover of weeds, especially in the alkaline grasslands. Our study confirmed that seed bank has a limited contribution to the maintenance of biodiversity in both grassland types. We found that five years of abandonment had a larger effect on the seed bank than on the vegetation. We stress that long-term management is crucial for controlling the emergence of the weeds from their dense seed bank in restored grasslands.Implications for practiceSeed sowing of grass mixtures can be a feasible tool for restoring grasslands at large scales. However, the developed vegetation usually has low biodiversity and a high seed density of weeds is typical in the soil seed bank even several years after the restoration. Therefore, post-restoration management is necessary for suppressing weeds both aboveground and belowground.We recommend to design the long-term management of the sites subjected to grassland restoration already in the planning phase of the restoration projects and ensure that the management plan is ecologically and economically feasible.We recommend to complement the monitoring of vegetation with the analysis of soil seed bank for evaluating restoration success.

scholarly journals Seed bank dynamics in restored grassland following the sowing of high- and low-diversity seed mixtures

2017 ◽  
Vol 26 ◽  
pp. S189-S199 ◽  
Author(s):  
Markus Wagner ◽  
Kevin J. Walker ◽  
Richard F. Pywell
Keyword(s):  
Seed Bank ◽  
Seed Bank Dynamics ◽  
Low Diversity ◽  
Seed Mixtures
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