Arbuscular mycorrhizal soil infectivity and spores distribution across plantations of tropical, subtropical and exotic tree species: a case study from the forest reserve of Bandia, Senegal

O comércio de mudas florestais para a recuperação de áreas degradadas e reflorestamento é crescente e demanda cada vez mais conhecimentos sobre práticas de manejo na produção de essências nativas, adequadas aos padrões ecológicos locais e à legislação ambiental vigente. Entretanto, a comercialização de mudas exóticas ainda é prática comum nos viveiros florestais, não existindo, para a microrregião de Juiz de Fora, MG, informações sobre os tipos de mudas comercializados nos viveiros florestais. Neste estudo foram levantadas as espécies florestais comercializadas em oito viveiros florestais no município de Juiz de Fora, MG, e que abastecem os projetos de reflorestamento na região. As espécies foram identificadas e categorizadas em nativas da Mata Atlântica ou exóticas. Foram encontradas ao todo 147 espécies. Destas, 64 (43,5% do total) foram exóticas, sendo encontradas, com grande frequência (>50%) entre os viveiros, englobando espécies frutíferas com perfil tipicamente comercial, como Psidium guaja), abacate (Persea americana), amora (Morus nigra) e cítricas – laranja, limão e tangerina (Citrus sp.). Também foram registradas algumas espécies consideradas de alto potencial invasor nas florestas Neotropicais, como o Jambo-rosa (Syzygium jambos), comercializada em metade dos viveiros analisados. A presente análise evidencia uma grande produção e comercialização de espécies exóticas de mudas florestais, utilizadas nos projetos de reflorestamento do município, o que não condiz com a legislação florestal vigente e ainda pode ser considerado como grande risco em potencial para invasão biológica.

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Restoration of opencast coal mine spoil by planting exotic tree species: a case study in dry tropical region

Ecological Engineering ◽

10.1016/j.ecoleng.2003.10.002 ◽

2003 ◽

Vol 21 (2-3) ◽

pp. 143-151 ◽

Cited By ~ 59

Author(s):

Raman Kumar Dutta ◽

Madhoolika Agrawal

Keyword(s):

Coal Mine ◽

Tree Species ◽

Mine Spoil ◽

Tropical Region ◽

Opencast Coal Mine ◽

Exotic Tree

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Assessment of Tree Species for Fuelwood Consumption in Northern Guinea Savannah Eco-region: A Case Study of Selected Local Government Areas of Katsina State, Nigeria

Asian Journal of Research in Agriculture and Forestry ◽

10.9734/ajraf/2020/v5i130075 ◽

2020 ◽

pp. 22-29

Author(s):

A. I. Sodimu ◽

M. B. Usman ◽

M. M. Olorukooba

Keyword(s):

Local Government ◽

Tree Species ◽

Formal Education ◽

Fuel Wood ◽

Forest Reserve ◽

Artificial Regeneration ◽

Alternative Sources ◽

Fuelwood Consumption ◽

Female Counterpart

Evaluation of preferred tree species for fuelwood consumption in selected local overnment area of Katsina State was studied. Random sampling techniques was used to administer thirty (30) questionnaire in each of the four (4) selected local government areas to make a total of one hundred and twenty (120) questionnaires. One hundred (100) were retrieved. The result revealed that Isoberlinia doka was the most preferred (24%) tree species for fuel consumption because of its high fire retaining capacity, low smoke and low moisture holding capacity while Cassia species and Odina barteri were the least (3% each). The major (70%) source of fuel wood supply to the market was from the forest. Funtua local government consumed more Fuelwood/head/year (64.06t/person/year) than all the other selected local government areas, while Sabuwa had the least (38.64 t/person/year). Fuelwood was the major (33%) energy source while gas (2%) was the least. Socio economic characteristics of the respondents were also examined. The percentage of male was 68%, while that of their female counterpart was 32%. Majority (50%) are married with many (35%) having 7-8 house hold size. 37% of the respondents had primary education while 26% had no formal education and majority (42%) were farmers. However, it is recommended that there is need for artificial regeneration of tree species exploited in form of woodlots, community forest plantation for continuous supply of wood on a sustainable bases and also other alternative sources of energy such as kerosene stove, gas cooker, solar etc should be encouraged and subsidized to the general populace to reduce the pressure on forest reserve.

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The Exotic Legume Tree Species Acacia holosericea Alters Microbial Soil Functionalities and the Structure of the Arbuscular Mycorrhizal Community

Applied and Environmental Microbiology ◽

10.1128/aem.02427-07 ◽

2008 ◽

Vol 74 (5) ◽

pp. 1485-1493 ◽

Cited By ~ 26

Author(s):

P. Remigi ◽

A. Faye ◽

A. Kane ◽

M. Deruaz ◽

J. Thioulouse ◽

...

Keyword(s):

Microbial Communities ◽

Tree Species ◽

Mycorrhizal Fungus ◽

Arbuscular Mycorrhizal ◽

Ectomycorrhizal Fungus ◽

Soil Microbial ◽

Exotic Tree ◽

Acacia Holosericea ◽

Arbuscular Mycorrhizal Community ◽

Exotic Legume

ABSTRACT The response of microbial functional diversity as well as its resistance to stress or disturbances caused by the introduction of an exotic tree species, Acacia holosericea, ectomycorrhized or not with Pisolithus albus, was examined. The results show that this ectomycorrhizal fungus promotes drastically the growth of this fast-growing tree species in field conditions after 7 years of plantation. Compared to the crop soil surrounding the A. holosericea plantation, this exotic tree species, associated or not with the ectomycorrhizal symbiont, induced strong modifications in soil microbial functionalities (assessed by measuring the patterns of in situ catabolic potential of microbial communities) and reduced soil resistance in response to increasing stress or disturbance (salinity, temperature, and freeze-thaw and wet-dry cycles). In addition, A. holosericea strongly modified the structure of arbuscular mycorrhizal fungus communities. These results show clearly that exotic plants may be responsible for important changes in soil microbiota affecting the structure and functions of microbial communities.

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The Role of Coffee Based Agroforestry System in Tree Diversity Conservation in Eastern Uganda

Journal of Landscape Ecology ◽

10.1515/jlecol-2017-0001 ◽

2017 ◽

Vol 10 (2) ◽

pp. 1-18 ◽

Cited By ~ 3

Author(s):

Worku Janka Negawo ◽

Dejene Nigatu Beyene

Keyword(s):

Tree Species ◽

Farming System ◽

Agroforestry System ◽

Social Benefits ◽

Land Area ◽

Forest Reserve ◽

Exotic Tree ◽

The Tropics ◽

Eastern Uganda

Abstract Agroforestry farming system comprises considerable cultivated land area in the tropics. Despite the economic and social benefits of the system for farmers, it is also known to have an important role in the conservation of tree species. This study aims to evaluate the composition and distribution of tree species in coffee based agroforestry system to determine the potential for biodiversity conservation. To address the objective of this study, 57 sample plots in farmers’ coffee field and 12 sample plots in forest reserve were surveyed in Eastern Uganda. The result shows that the number of indigenous tree species in coffee farms was lower than that of forest reserve. Similarly, tree species richness per plot, Shannon and Simpson diversity indexes of forest reserve were significantly (p≤0.05) higher than that of coffee farms. However, with the inclusion of exotic tree species, coffee farms were found to be significantly higher than that of forest reserve for the above diversity indexes. On the other hand, the distribution of tree species in the coffee farms were mainly dominated by few tree species indicating the need for measures that ensure the sustainability of those less represented tree species.

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