scholarly journals SOIL SEED BANK AS A BIOINDICATOR TO IDENTIFY INVASIVE SPECIES

FLORESTA ◽  
2021 ◽  
Vol 51 (3) ◽  
pp. 760
Author(s):  
Ariane Cristine Araujo Silva ◽  
Sebastião Venâncio Martins ◽  
Diego Balestrin
Keyword(s):  
Seed Bank ◽  
Leucaena Leucocephala ◽  
Soil Seed Bank ◽  
Average Density ◽  
Native Forest ◽  
Exotic Tree ◽  
Number Of Individuals ◽  
The City ◽  
Muntingia Calabura ◽  
Germinated Seeds

This study aimed to characterize the soil seed bank in an area dominated by Leucaena leucocephala, here called “Povoamento de Leucaena” (PL) and an area of native forest in the Parque Estadual do Rio Doce (PERD), both of which are affected by the city of Ipatinga, MG. Thirty sample units (SU) with dimensions of 25.0 x 25.0 x 5.0 cm were installed in each of the study areas and the seed bank of the areas was collected and evaluated. The emerging seedlings were counted and identified; the evaluations were carried out weekly during the six-month period. The average density of germinated seeds was 716.2 seeds/m² in the PL and 86.4 seeds/m² in the PERD area. In addition, 39 species were identified in the PL area (41% exotic), while in the PERD area 32 species were identified (25% exotic). The exotic tree species that stood out in number of individuals were Muntingia calabura and L. leucocephala, representing 82.57% and 5.88%, respectively of the total individuals found. Therefore, both environments are under strong environmental pressure, requiring the control of existing exotic species, as well as enrichment actions with the planting of species of diversity to accelerate the restoration process in the PL area.

scholarly journals COMPOSIÇÃO DO BANCO DE SEMENTES NO SOLO EM ÁREAS DE PRESERVAÇÃO PERMANENTE SOB DIFERENTES TIPOS DE COBERTURA

FLORESTA ◽  
2013 ◽  
Vol 43 (1) ◽  
pp. 49 ◽  
Author(s):  
Lauri Amandio Schorn ◽  
Tatiele Anete Bergamo Fenilli ◽  
Andres Krieger ◽  
Gabriel Corso Pellens ◽  
Juliana Jaqueline Budag ◽  
...  
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Mixed Forest ◽  
Soil Samples ◽  
Native Forest ◽  
Plant Groups ◽  
Different Types ◽  
Forest Reclamation ◽  
Reclamation Area ◽  
Germinated Seeds

 Este estudo teve como objetivo avaliar a composição e similaridade do banco de sementes no solo em três áreas com diferentes históricos de cobertura do solo: I - floresta nativa remanescente; II - extração recente de Pinus; III - reflorestamento de Pinus. Foram coletadas 10 amostras de solo aleatoriamente, para cada uma das três áreas. As amostras de solo foram colocadas em bandejas de 60 x 40 x 10 cm e dispostas em canteiros a céu aberto no laboratório de silvicultura da FURB, em Blumenau, SC, para análise da germinação, entre junho de 2008 e maio de 2009. As plântulas germinadas foram classificadas em grupos: arbóreas, arbustivas, cipós, herbáceas, gramíneas, pteridófitas e arbóreas exóticas. Foram identificados 2223 indivíduos, pertencentes a 37 espécies e 22 famílias. As espécies com maior quantidade de sementes germinadas nos três ambientes foram Eupatorium compressum e Braquiaria subquadripara. A densidade de indivíduos/m2 foi de 2.846 (ambiente I), 4.292 (ambiente II) e 2.125 (ambiente III). O número de espécies, diversidade e equabilidade foram decrescentes do ambiente I para o ambiente III. Concluiu-se que o tipo de uso e cobertura da área tem relação com a densidade dos grupos de plantas presentes no banco de sementes no solo.Palavras-chave: Regeneração; Floresta Ombrófila Mista; recuperação de área.AbstractComposition of soil seed bank in areas of permanent preservation under different types of coverage. The aim of this study was to evaluate the composition of soil seed bank in three types of use of permanent preservation area: I - remaining native Forest; II - recent extraction of Pinus; III - reforestation of Pinus. 10 soil samples were collected in randomly points distributed in each one of the three areas. The soil samples were individually placed in plastic trays with 60 x 40 x 10cm and arranged in open plots in the Silviculture Laboratory of FURB in Blumenau - SC, for analysis of germination, from June 2008 to May 2009. The seedlings were classified into groups: trees, shrubs, vines, herbs, grasses, ferns and pine. 2223 individuals were identified; they belonged to 37 species and 22 families. The species with the largest number of germinated seeds within the three environments were Eupatorium compressum and Braquiaria subquadripara. The density was 2846 indivíduals.m2 (environment I), 4292 (environment II) and 2125 (environment III). The number of species and diversity values decreased from environment with native remaining forest to the environment area with Pinus. Results point to the fact that the type of use and coverage of the area is related to density of plant groups present in the soil seed bank. Keywords: Regeneration; Mixed Forest; reclamation area.  

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

scholarly journals MORPHOFUNCTIONAL ECOLOGY OF SEEDLINGS FOUND IN A TROPICAL RAINFOREST SEED BANK, IN THE NORTHEAST OF BRAZIL

FLORESTA ◽  
2021 ◽  
Vol 51 (3) ◽  
pp. 614
Author(s):  
Joselane Príscila Gomes Da Silva ◽  
Luiz Carlos Marangon ◽  
Ana Lícia Patriota Feliciano ◽  
Rinaldo Luiz Caraciolo Ferreira
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Floristic Composition ◽  
Average Density ◽  
Shade Cloth ◽  
Forest Remnant ◽  
The Family ◽  
Polyethylene Bags ◽  
And Gender ◽  
Ombrophilous Forest

The aim of this study was to evaluate the identification and floristic composition of seedlings of tree species, located in the soil seed bank of a remnant of the Dense Ombrophilous Forest of the Lowlands, in the Northeast of Brazil, from a morphofunctional ecology standpoint. A hundred and fifty two soil samples (0.2 m x 0.15 m x 0.05 m) were taken from a forest remnant, stored in polyethylene bags, identified and then taken to the Forest Nursery at the Federal Rural University of Pernambuco, where they were placed in polyethylene boxes under a 70% shade cloth and evaluated daily for a period of seven months. The seedlings emerged were photographed, separated into morphospecies, identified at the family and gender level and, when possible, at the species level. The density and absolute frequency, as well as the successional and morphological classification of the seedling cotyledons were estimated. In total, 1,577 seedlings of 31 morphospecies were cataloged. Melastomataceae was the family that presented the greatest richness, representing 48% of the species identified. The average density was 344.62 seeds.m-2, with higher densities for species of the family Melastomataceae, together with Maprounea guianensis and Cecropia palmata. There was a predominance of seedlings with epigeal and phanerocotylar germination, and with foliaceous cotyledons, corresponding to 93.56%. The seed bank was composed, predominantly, by pioneer species such as Cecropia palmata, Henriettea succosa, Miconia hypoleuca and Miconia tomentosa. Seedlings with epigeal germination, foliaceous and phanerocotylar cotyledons predominated for being easily established in more open areas.

scholarly journals Effects of tree size and park maintenance on soil seed bank of Gleditsia triacanthos, an exotic tree in urban green areas

2020 ◽  
Vol 71 (1-2) ◽  
pp. 81-91
Author(s):  
Péter Csontos ◽  
Tibor Kalapos ◽  
Tito Faradhimu ◽  
Annamária Laborczi ◽  
Tamás Hardi ◽  
...  
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Tree Size ◽  
Gleditsia Triacanthos ◽  
Urban Green ◽  
Urban Green Areas ◽  
Exotic Tree ◽  
Green Areas

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 Soil Seed Bank Dynamics of Weed Flora in Upland and Lowland Paddy Cultivation Areas of Far Western Nepal

1970 ◽  
Vol 5 (5) ◽  
pp. 54-59 ◽  
Author(s):  
MD Bhatt ◽  
SP Singh
Keyword(s):  
Seed Bank ◽  
Soil Seed Bank ◽  
Soil Samples ◽  
Weed Species ◽  
Scientific World ◽  
Seed Bank Dynamics ◽  
Weed Flora ◽  
Paddy Cultivation ◽  
Study Sites ◽  
Number Of Individuals

For the analysis of composition of individuals of weed flora, soil samples were taken with diameter of 8cm and depth of 10cm. Soil seed bank dynamics of weed flora experiments were carried out 2004 and 2005 by incubating soil samples collected from the upland and lowland sites. Soil seed bank dynamics of weed flora were recorded by incubating soil samples collected from the two study sites. A total of 46 weed species germinated of which 18 families and 34 genera in soil samples of upland site. From lowland site soil samples, the species were just marginally lower, 43 belonging to 32 genera and 17 families. The mean total number of individuals of weeds that germinated in soil samples of upland site was 517 compared to 503 at lowland site. The highest number of weeds (186) was of the family Cyperaceae (37% of the species). The proportion of this family was 35.6% at the upland site. The dominant families were Cyperaceae, Scrophulariaceae and Poaceae in both the study sites. Of the total germinated weed species, the highest number of individuals of broad-leaved followed by sedges and grasses in both the study sites. Key words: Paddy; Weeds; Seed bank; Upland; Lowland. DOI: 10.3126/sw.v5i5.2657 Scientific World, Vol. 5, No. 5, July 2007 54-59

Forage palatability of Broussonetia papyrifera an invasive species in Ghana: Relative preference and palatability by sheep and goats

2018 ◽  
Vol 2 (2) ◽  
pp. 63-70 ◽  
Author(s):  
R. Obour
Keyword(s):  
Invasive Species ◽  
Leucaena Leucocephala ◽  
Condensed Tannin ◽  
Block Design ◽  
Wet Season ◽  
Broussonetia Papyrifera ◽  
Sheep And Goats ◽  
Relative Preference ◽  
Exotic Tree ◽  
High Level

Broussonetia papyrifera is an exotic tree widely grown for paper production. Due to its prolific regeneration it has invaded forestcanopy gaps and degraded farmlands and has now become an invasive species in Ghana. In enhancing its value for use the plantwas evaluated as potential forage for grazing animals vis-à-vis other two existing forage plants: Ficus exasperata and Leucaenaleucocephala.The study assessed the palatability and preference of Broussonetia papyrifera using sheep and goats for the wet anddry seasons.The species were assessed in indoor pen feeding trials using eight-unit (3×3 m) pens with the cafeteria method.The amount of forage offered was 100g (fresh material) in all instances for each species and for ten minutes. Adesign basedon 3×2×2 factorial in Randomized Complete Block Design (RCBD) was used to test the differences in palatability betweenthe three forage species.Results revealed that palatability was higher (P<0.05) in Leucaena leucocephala compared with Ficusexasperata and Broussonetia papyrifera for sheep and goats across seasons. The trend shown might be the result of the effectsof familiarity with the Leucaena leucocephala since animals tend to select plants that are familiar than newly introduced andunfamiliar plants. The study also revealed high level of condensed tannin (CT) in Broussonetia papyrifera which might haveinterfered with forage intake by the animals.There were no significant differences in palatability of Broussonetia papyrifera forgoat in both dry and wet season interactions and Ficus exasperata for goat in both dry and wet season interactions (P>0.05).Thestudy concluded that Broussonetia papyrifera could be a potential feed for both sheep and goats across seasons.The researchrecommended that livestock farmers should incorporate Broussonetia papyrifera feed into their programmes for both sheep andgoats and should be introduced to animals from infancy so that it may become a familiar feed for them.

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