The Relationship between Attributes of Plants Represented in the Germinable Seed Bank and Stocking Pressure in a Semi-arid Subtropical Rangeland

1997 ◽  
Vol 45 (6) ◽  
pp. 1055 ◽  
Author(s):  
S. C. Navie ◽  
R. W. Rogers ◽  
R. W. Rogers
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Water Source ◽  
Close Proximity ◽  
Growth Habits ◽  
Reproductive Phases ◽  
The Relationship ◽  
Water Species ◽  
Germinable Seed ◽  
Semi Arid

A range of diaspore and mature plant attributes of the species represented in the germinable seed bank of a semi-arid subtropical Queensland sheep rangeland was investigated. The attributes of both the diaspores themselves and the plants that produced them changed as distance from water increased. Close to the water source, species with prostrate or erect growth habit and with low palatability and capsular fruits were common, whereas further from the water source plants with ascending growth habits, high palatability and mericarpic fruits were more frequent. At close proximity to water, species with diaspores that germinated rapidly, were unornamented, with unassisted dispersal and rounded in shape were common, whereas at greater distance from water, species tended to possess diaspores which germinated slowly, were ornamented (possessed awns, barbs, or hairs), with an elongated shape. Longevity of the plants (annual or perennial) was not significantly affected by distance from water. The dormant, vegetative and reproductive phases of plants that are successfully incorporated into the germinable soil seed bank can, therefore, be related to success under the different stocking intensities present at different distances from water.

The Relationship Between Distance From Water and the Soil Seed Bank in a Grazed Semi-Arid Subtropical Rangeland

1996 ◽  
Vol 44 (4) ◽  
pp. 421 ◽  
Author(s):  
SC Navie ◽  
RA Cowley ◽  
RW Rogers
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Common Species ◽  
Pressure Gradients ◽  
Standing Vegetation ◽  
Open Woodland ◽  
The Relationship ◽  
Germinable Seed ◽  
Eucalyptus Populnea ◽  
Semi Arid

The germinable soil seed bank of a grassy Eucalyptus populnea F.Muell, open woodland was investigated in relationship to distance from water (away from a bore-drain) on North Yancho Station, near Bollon in southern semi-arid Queensland. The germinable soil seed bank was both diverse and abundant, 69 taxa of seedlings being identified to species and 2 more to genus. A mean density of 13 207 ± 4160 seeds m-2 was recorded, with over 80% of the seed being from the annual forbs Crassula sieberana (Schultes & J.H.Shultes) Druce, Wahlenbergia tumidifructa P.J.Smith and Dysphania gomulifera (Nees) Paul G.Wilson. Most common species showed spatial variation in their germinable seed density with relation to distance from water, resembling the patterns previously reported by other authors for standing vegetation under stocking pressure gradients.

scholarly journals Germinable Soil Seed Bank in Biancana Badlands

Diversity ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 223
Author(s):  
Simona Maccherini ◽  
Elisa Santi ◽  
Dino Torri
Keyword(s):  
Land Cover ◽  
Spatial Pattern ◽  
Seed Bank ◽  
Soil Seed Bank ◽  
Central Italy ◽  
Regeneration Potential ◽  
Bank Structure ◽  
Standing Vegetation ◽  
The Relationship ◽  
Germinable Seed

Seed banks are important for understanding vegetation dynamics and habitat regeneration potential. Biancana badlands are vanishing landscapes where recurring and non-recurring management has been advocated to restore vegetation. Here, we investigated germinable seed bank structure and composition of a biancana badland in central Italy and evaluated the relationship between the standing vegetation and soil seed bank. We identified four land cover classes in five biancana badlands of Tuscany (central Italy) and collected data from 132 vegetation plots and 660 soil cores. We recorded 117 species in the standing vegetation. The seedlings that emerged from the soil samples, mostly annual species, numbered 183 and belonged to 31 taxa (392.5 seedlings/m−2 on average across the four land cover classes). Standing vegetation showed an aggregated spatial pattern with distinct communities while the seed bank showed a less aggregated spatial pattern. The similarity between the seed bank and standing vegetation was low. In contrast with the features generally found for disturbed and pioneer communities, but in line with seed bank characteristics of other badlands, the seed bank was particularly poor in species.

scholarly journals Soil seed bank recovery occurs more rapidly than expected in semi-arid Mediterranean gypsum vegetation

2011 ◽  
Vol 109 (1) ◽  
pp. 299-307 ◽  
Author(s):  
J. M. Olano ◽  
I. Caballero ◽  
A. Escudero
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Semi Arid

Abandoned corrals: colonization and vegetation recovery of ephemeral habitats in silvo-pastoral systems

2020 ◽  
Vol 13 (6) ◽  
pp. 722-731
Author(s):  
Arie Vinograd ◽  
Eli Zaady ◽  
Jaime Kigel
Keyword(s):  
Seed Bank ◽  
Negative Impact ◽  
Soil Seed Bank ◽  
Mineral Resources ◽  
Natural Forests ◽  
Planted Forests ◽  
Pastoral Systems ◽  
Animal Protection ◽  
Dispersal Vectors ◽  
Semi Arid

Abstract Aims Management of silvo-pastoral systems in planted and natural forests in semi-arid Mediterranean regions often employs seasonal night corrals for animal protection. This management system changes the spatial distribution of animal excreta, resulting in a net transfer of soil mineral resources and their accumulation in the corrals. After abandonment, corrals are colonized by ruderal species, becoming focal sources for their spread in the forest. We aimed to implement a rational management of seasonal sheep corrals based on a better understanding of the vegetation processes occurring in abandoned corrals, in order to alleviate their negative impact in the forest. Methods Relationships between temporal changes in the vegetation, the soil seed-bank and levels of soil nutrients were studied in a chronosequence of abandoned sheep corrals and compared with nearby reference plots in planted Eucalyptus forests grazed by sheep in the semi-arid North-Western Negev, Israel. The region has a bi-seasonal Mediterranean climate, with high dominance of annual species in the grazing range. Important Findings Abandoned sheep corrals were colonized by seeds of ruderals originating in older abandoned corrals. Subsequent successional changes occur at a slow rate, driven by the depletion of soil resources in the abandoned corrals, and were still in progress 20 years after abandonment. Ruderals were gradually replaced, first by taller grasses and followed by short grasses, but most forbs and particularly geophytes did not recover during this period. Recovery of the original herbaceous vegetation in the corrals was through seed dispersal from the surrounding vegetation, not from the original soil seed-bank remaining in the corrals after abandonment. Ruderal species in the grazed, planted forests behave as patch-tracking metapopulations. Their persistency depends on constant creation of new corrals compensating for the gradually dwindling populations in older abandoned corrals, and on the availability of dispersal vectors.

Sensitivity cycling to physical dormancy break and seed vigour of twoIpomoeaspecies (Convolvulaceae)

2009 ◽  
Vol 19 (4) ◽  
pp. 249-259 ◽  
Author(s):  
K.M.G. Gehan Jayasuriya ◽  
Jerry M. Baskin ◽  
Dennis M. Tekrony ◽  
Carol C. Baskin
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Dormancy Breaking ◽  
Physical Dormancy ◽  
Seed Vigour ◽  
Ipomoea Lacunosa ◽  
Moisture Contents ◽  
Seed Moisture ◽  
The Relationship ◽  
Treatment Sensitivity

AbstractThe physically dormant seeds ofIpomoea lacunosaand ofI. hederaceaundergo sensitivity cycling (insensitive ↔  sensitive) to dormancy-breaking treatment. Sensitivity cycling is important to seeds with physical dormancy in sensing appropriate environmental conditions for germination. Seed vigour is also important to seedling establishment, but no study has compared changes in vigour (or not) with changes in sensitivity. This study was conducted to determine the relationship between sensitivity cycling and seed vigour inI. lacunosaandI. hederacea. The seed moisture contents of insensitive and sensitive seeds ofI. lacunosaand of sensitive seeds ofI. hederaceawere measured, and several vigour tests were performed. Vigour of sensitive seeds ofI. lacunosadecreased more rapidly than that of insensitive seeds. No significant change in vigour was observed in either permeable or impermeable seeds ofI. hederacea. We conclude that sensitivity cycling to physical dormancy break is important in maintaining vigour ofI. lacunosaseeds in the soil seed-bank.

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