scholarly journals RELATIONSHIP BETWEEN SOIL SEED BANK AND CANOPY COVERAGE IN A MINED AREA

2019 ◽  
Vol 43 (4) ◽  
Author(s):  
Diego Balestrin ◽  
Sebastião Venâncio Martins ◽  
Wesley Fonseca ◽  
Luiz Henrique Elias Cosimo
Keyword(s):  
Seed Bank ◽  
Natural Regeneration ◽  
Forest Restoration ◽  
Diversity Index ◽  
Soil Seed Bank ◽  
Spatial Proximity ◽  
Canopy Openness ◽  
Area Index ◽  
Restoration Process ◽  
High Dispersal

ABSTRACT The objective of this study was to evaluate and correlate information about soil seed bank and canopy (%Canopy Openness and Leaf area index-LAI) in a mined area in restoration process through natural regeneration. The study area is located in Zona da Mata of Minas Gerais, which presents predominance of Semideciduous Seasonal Forest, and has an area of 0.5 ha in process of natural regeneration after six years of bauxite exploitation (without any intervention). Along the area, ten plots of 45x29cm were allocated and distributed in the best way to represent the whole area in restoration process. Seed bank diversity and canopy characteristics were evaluated in these plots, the last one using a NIKON D40X photographic camera, with fisheye lens of 8mm. As results, 8280 individuals (tree, shrub, herbs, and vines) were found, totaling 51 species and 24 botanical families. The Shannon diversity index (H’) was 2.770, and the equability (J) was 0.705, which demonstrate an average diversity in this area, with a density of 2114.94 germinated seeds m-2. Through the evaluation of the seed bank, the presence of exotic species (23.5%), the dominance of the pioneer species (68.6%), as well as high dispersal by wind (52.9%) were verified in the area. According to canopy characteristics, a significant variation between different points/regions within the study area was found, while patterns of existence of certain herbs as a function of canopy openness (lower vegetal cover/clearings) were also identified, as well as in response to spatial proximity between the allocated plots, confirming the high correlation between these two variables and their importance in the process of forest restoration.

Soil seed bank characteristics in two central African forest types and implications for forest restoration

2018 ◽  
Vol 409 ◽  
pp. 766-776 ◽  
Author(s):  
Chauvelin Douh ◽  
Kasso Daïnou ◽  
Jean Joël Loumeto ◽  
Jean-Marie Moutsambote ◽  
Adeline Fayolle ◽  
...  
Keyword(s):  
Seed Bank ◽  
Forest Restoration ◽  
Soil Seed Bank ◽  
Forest Types

scholarly journals NATURAL REGENERATION STRATUM AS AN INDICATOR OF RESTORATION IN AREA OF ENVIRONMENTAL COMPENSATION FOR MINING LIMESTONE, MUNICIPALITY OF BARROSO, MG, BRAZIL

2016 ◽  
Vol 40 (2) ◽  
pp. 189-196 ◽  
Author(s):  
Wanuza Helena Campos ◽  
Sebastião Venâncio Martins
Keyword(s):  
Significant Influence ◽  
Natural Regeneration ◽  
Riparian Vegetation ◽  
Diversity Index ◽  
Floristic Composition ◽  
Psidium Guajava ◽  
Floristic Diversity ◽  
Restoration Process ◽  
Number Of Species ◽  
Management Actions

ABSTRACT This study was conducted in a forest under restoration process, which belongs to the company Holcim Brasil S/A, in the municipality of Barroso, state of Minas Gerais (21º00'to 22º00'S and 43º00' to 44º00'W), where 40 plots (2 x 2 m) were set, spaced at 10 m, forming eight strata parallel to the watercourse present in the area. Floristic composition and natural regeneration stratum were characterized, and the formed strata allowed evaluating whether the riparian vegetation and watercourse influence on the local regeneration. It was found 162 individuals of 13 families, 18 genera and 22 species, and 10,125 individuals/ha were estimated. Successional classes from pioneer and early secondary and zoochory dispersion syndrome prevailed among species and individuals. The watercourse and riparian vegetation did not exercise significant influence (p> 0.05) on the number of species and regenerating individuals among the different strata of the forest. The diversity index of Shannon-Wiener (H') and equability of Pielou (J') were 2.691 and 0.870, respectively. The species Psidium guajava and Myrtaceae families presented the highest VI (value of importance). Natural regeneration analysis showed the low floristic diversity in the area, suggesting that corrective management actions should be adopted.

scholarly journals Assessment of the Soil Seed Bank Aiming at Transposition to Forest Regeneration in the Western Amazonia

2021 ◽  
Vol 9 (2) ◽  
pp. 471
Author(s):  
Bruno Machado Araújo ◽  
Anatércia Ferreira Alves ◽  
Paulo Alexandre Fernandes Rodrigues ◽  
Leonardo Hunaldo dos Santos ◽  
Mário Luiz Ribeiro Mesquita
Keyword(s):  
Seed Bank ◽  
Forest Regeneration ◽  
Secondary Forest ◽  
Diversity Index ◽  
Soil Seed Bank ◽  
Similarity Index ◽  
Importance Value ◽  
Floristic Similarity ◽  
Important Species ◽  
Number Of Individuals

This study evaluated the soil seed bank’s germination potential and density in five distinct environmental areas namely: a) regenerated forest, b) secondary forest, c) degraded pasture, d) Eucalyptus sp. plantation and e) fallow corn growing area, with a view to regenerate forests in Western Amazonia using tray germination methodology. We assessed floristic similarity and diversity using the Jaccard Similarity Index and the Shannon Diversity Index, respectively. We computed each species’ phytosociological parameters: density, frequency and importance value of each species. We recorded a total 3674 individuals from 51 species and 21 families. The families with the highest species richness were Asteraceae, Malvaceae, Cyperaceae and Poaceae that contributed to 43% of the total species observed. The most important species computed in the phytosociological analysis were Chamaesyce hirta, Corchorus aestuans, Cyperus iria and Chamaesyce prostrata. All species had a herbaceous life form, which in the literature, are considered weeds. We documented the largest number of individuals in the fallow corn growing area that had 3620 plants m-2 and the smallest number in the regenerated forest that had 183 plants m-2. We observed the greatest floristic similarity between the secondary forest and Eucalyptus sp. plantation (40%), and the greatest floristic diversity in the Eucalyptus sp. plantation (H '= 2.59 nats individual-1). In conclusion, the transposition of the soil seed bank is not recommended for forest regeneration and recovery in degraded areas due to massive weed predominance in the soil seed bank.

scholarly journals Natural vegetation regeneration from soil seed banks in the cultivated edges of Sudd wetlands in Juba, Southern Sudan

2021 ◽  
Vol 2 (2) ◽  
Author(s):  
Josephine Esaete ◽  
Augustine Bongo ◽  
Thomas Lado ◽  
Tomor Bojoi ◽  
Henry Busulwa
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Seed Bank ◽  
Natural Regeneration ◽  
Soil Seed Bank ◽  
Seed Banks ◽  
Interquartile Range ◽  
Seed Density ◽  
Soil Seed Banks ◽  
Species Richness And Diversity

Soil seed banks are important for regeneration of degraded wetlands ecosystems. The Sudd wetlands of Juba city have long been encroached for crop cultivation. Seedling germination was monitored in a greenhouse to establish possible natural regeneration in Mindiari, Rejaf and Roton wetlands in the Sudd. Sixty-four species germinated from the soil seed bank of which 12.5% were dominated by Cyperus difformis and Typha capensis. The findings showed that median wetland species richness in Mindiari was 1.5 (interquartile range = 0.75?3.5), Rejaf 2.5 (interquartile range = 1.0 ? 4.0), Roton 3 (interquartile range = 1.0 ? 5.0) while median Shannon-Wiener diversity was 1.5 (1.14 ?1.73), 1.43 (1.01?1.66), 1.15 (0.98?1.67) for Mindiari, Rejaf and Roton respectively. Both the median seed species richness and diversity were not significantly different among the study wetlands. The median of seed density (56.1) was significantly higher in Roton than in Mindiari (36.7) and Rejaf (29.4) wetlands. The NMDS results showed that species composition of Mindiari and Rejaf was different from Roton. It is concluded that growing crops in wetlands did not influence species richness and diversity but it reduced seed density and altered species composition. Although wetland species were not significantly different in the three-wetland categories, dominance of canopy species belonging to Typhaceae and Cyperaceae indicates that these species are resilient to cultivation and could facilitate natural regeneration of cultivated wetlands edges of the Sudd region in Juba. Further research should examine effect of cultivation duration and flooding regimes on soil seed bank species richness, diversity, and density and composition.

scholarly journals Soil seed banks in two environments of forest restoration post bauxite mining: native tree plantation and natural regeneration

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Sebastião Venâncio Martins ◽  
Wesley da Silva Fonseca ◽  
Luiz Henrique Elias Cosimo ◽  
Diego Balestrin
Keyword(s):  
Natural Regeneration ◽  
Forest Restoration ◽  
Soil Seed Bank ◽  
High Similarity ◽  
Tree Plantation ◽  
Bauxite Mining ◽  
Soil Seed Banks ◽  
Three Samples ◽  
Minas Gerais State ◽  
Ecological Dominance

The objective of this study was to compare the soil seed bank of an area under natural regeneration (F1) and another reforested through seedling planting (F2), seven years after bauxite mining, in Minas Gerais State, Brazil. In each area, 10 sampling points were randomly distributed, using three samples of topsoil to represent each point. The samples were transported to a shade house and evaluated for six months, where emerging individuals were identified every two weeks. In F1, 2,114.94 propagules m-2 were registered, belonging to 51 species and 24 botanical families, H’=2.770 e J’=0.705. In F2, 1,168.62 propagules m-2 were registered, belonging to 42 species and 22 families, H’=2.618 and J’=0.700. The Jaccard index between F1 and F2 was 0.61, indicating a high similarity between the analyzed areas. The results showed high density of propagules, good diversity and absence of ecological dominance. The high similarity between forests is related to geographical proximity, the same topsoil origin (agricultural/pasture) and also to the role of the dispersing fauna. The high number of individuals and diversity of tree species with zoochoric dispersion found in the areas indicate that both natural regeneration and reforestation were efficient in the ecological restoration of bauxite mined areas. 

scholarly journals Ecological restoration through natural regeneration in Chunati Wildlife Sanctuary – a protected area of South-East Bangladesh

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Abdullah Al Mamun ◽  
Mohammed Kamal Hossain ◽  
Md. Akhter Hossain
Keyword(s):  
Ecological Restoration ◽  
Seed Bank ◽  
Forest Ecosystem ◽  
Tree Species ◽  
Natural Regeneration ◽  
Management Strategy ◽  
Soil Seed Bank ◽  
Wildlife Sanctuary ◽  
Importance Value ◽  
Content Type

PurposeIn this paper, the authors show that ecological restoration potential through natural regeneration of degraded tropical rainforest is possible. This is significant because at present most of the tropical forest of the world, including of Bangladesh, are degraded.Design/methodology/approachRegeneration status of Chunati Wildlife Sanctuary (CWS) was assessed through stratified random sampling method using sample plots of 5 × 5 m in size covering 269 sample plots.FindingsA total of 3,256 regenerating seedlings/saplings of 105 species belonging to 35 families were recorded from CWS. From regenerating tree species, maximum (37.83) family importance value (FIV) index was found for Euphorbiaceae followed by Myrtaceae (18.03). Maximum importance value index (IVI) was found for Aporosa wallichii (21.62) followed by Grewia nervosa (16.41). Distribution of seedlings into different height classes of regenerating tree species was also calculated.Practical implicationsForest scientists are working to find out the best nature-based solution for ecological restoration of tropical rainforests to attain climate resilient ecosystem in a sustainable way. Tropical rain forest has huge plant diversity, and we find that ecological restoration is possible through natural regeneration from its rich soil seed bank. Natural regeneration is the best nature-based solution for sustainable management of the forest.Social implicationsThe authors believe that the findings presented in our paper will appeal to the forest and environmental scientists. The findings will allow readers to understand degraded tropical hill forest ecosystem and its management strategy.Originality/value The authors believe that this manuscript will give a clear picture about degraded tropical hill forest ecosystem and its genetic composition, diversity and soil seed bank status to apply appropriate management strategy.

scholarly journals Soil Seed Bank and Natural Regeneration of Trees

2016 ◽  
Vol 9 (2) ◽  
pp. 73 ◽  
Author(s):  
Molla Mekonnen Alemu
Keyword(s):  
Seed Bank ◽  
Natural Regeneration ◽  
Negative Impact ◽  
Soil Seed Bank ◽  
Current Trend ◽  
Vital Role ◽  
Regeneration Process ◽  
Forest Plantations ◽  
Excessive Pressure ◽  
Physical And Chemical

The current trend of natural resources utilization, such as soils is getting incompatible with the natural, biological, physical and chemical processes of ecosystems. Excessive pressure of increasing agricultural production has exerted a negative impact on soil and its associated resources development. As the agricultural frontiers are getting exhausted in terms of productivity, immediate need has been developed to bring previously considered marginal and peripheral lands under cultivation by clearing forest resources by posing a sever threat to different ecosystems. Forest plantations are generally considered as efficient ways for the sustained development, rehabilitation and protection of land resources. Forest plantations will also provide other ecosystem services like, timber and associated products, control of soil erosion, edible fruits, shelter for wildlife, moderating climate and weather and carbon sequestration. Apart from this, forest plantations will serve a natural medium for the succession of the forest in the understory by moderating the microclimate and by creating the conducive environment for the proper functioning of dispersal agents and the soil seed bank regeneration process. The objective of this article is, therefore, to outline the soil seed bank elements and the natural regeneration process of trees as knowledge about soil seed bank and regeneration process plays a vital role in the proper management of forest development activities and understanding of forest dynamics.

The seed rain and seed bank of an adjacent native tallgrass prairie and old field

1997 ◽  
Vol 75 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Gary W. Schott ◽  
Steven P. Hamburg
Keyword(s):  
Tallgrass Prairie ◽  
Seed Bank ◽  
Native Species ◽  
Diversity Index ◽  
Soil Seed Bank ◽  
Seed Rain ◽  
Dispersal Ability ◽  
Field Plot ◽  
Old Field ◽  
Native Prairie

The ability of a grassland to regenerate following disturbance depends on the presence of seeds of native plants and the ability of the seeds to germinate. To examine whether the presence or absence of plant propagules influences reestablishment of tallgrass prairie on abandoned agricultural lands, we sampled the seed rain and soil seed bank across a transition from native tallgrass prairie to unmanaged successional grassland (old field). The native prairie seed rain was seven times greater than that of the old field, richer in species (33 vs. 27), and more diverse (diversity index 0.96 vs. 0.73). In addition, the native tallgrass prairie seed bank was three times as dense as the old-field seed bank and contained the seeds of more species (23 vs. 19), but had a lower index than did the old field (0.81 vs. 1.08). One species, Sphenopholis obtusata, present in the prairie, was observed dispersing to the old-field plot, but was absent in the old-field plot; this observation suggests that at least some species are unable to establish on the old-field plot. Thus, the ability of a native grassland to reestablish may be limited by the dispersal ability of native species and the ability to establish once dispersed. Key words: seed rain, seed bank, native tallgrass prairie, old-field succession.

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