Population dynamics of Garcinia lucida (Clusiaceae) in Cameroonian Atlantic forests

Guedje, Nicole Marie; Lejoly, Jean; Nkongmeneck, Bernard-Aloys; Jonkers, W.B.J.

doi:10.1016/s0378-1127(02)00444-9

Cited by 47 publications

(45 citation statements)

References 27 publications

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“…The success of regeneration can be predicted on the basis of current population structure, growth and fecundity (Guedje et al 2003). Population structure and regeneration status of tree species in terms of proportions of seedlings, saplings and adults varied greatly.…”

Section: Discussionmentioning

confidence: 99%

Tree Species Diversity and Its Population and Regeneration Status in Homegardens of Upper Assam, Northeast India

Saikia¹,

Khan²

2016

Journal of Forest and Environmental Science

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Study was conducted to investigate tree diversity and its population and regeneration status in homegardens of upper Assam, Northeast India through field study by quadrat method. A total of 154 tree species have been recorded from 135 studied homegardens under 109 genera 53 families. Most of these species (79%) are indigenous to our country, while the rest (21%) arealiens (naturalized and cultivated exotics) by origin. Tree species richness per homegarden varies greatly in different homegardens and is ranged from 5 to 52 tree species with a mean of 22 (SE±0.58). A. malaccensis is the most dominant tree species in the studied homegardens contributed 34% of the total tree density of the documented trees. The tree density is much higher with 4,259 individuals ha ) is very less. Based on the number of individuals present, very rare species is accounted for 10%, rare species 39%, common species 19%, dominants 14% and predominant species 18% in the present study. The population density of 154 tree species is 4,259 (individuals ha −1 ) for adults (＞3.18 cm DBH), 5,902 (individuals ha −1 ) for saplings and 38,164 (individuals ha −1 ) for seedlings. The density of seedlings＞saplings＞adults represents good regeneration status of tree species in studied homegardens. The population structure study showed that about 8% tree species have good regeneration status, 9% have fair regeneration status, 48% have poor regeneration status and 34% tree species have no regeneration. Study suggests that research and development action is needed to stimulate regeneration of those tree species which having high importance value indices but showing poor or no regeneration. Based on present observation, it can be conclude that homegarden can emerge as an effective means for both economic well-being and biodiversity conservation in upper Assam, Northeast India.

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Section: Discussionmentioning

confidence: 99%

Tree Species Diversity and Its Population and Regeneration Status in Homegardens of Upper Assam, Northeast India

Saikia¹,

Khan²

2016

Journal of Forest and Environmental Science

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“…Outras dobram a planta ou os ramos no momento da coleta ao invés de chacoalhar e bater no caule, o que aumenta os efeitos negativos de longo prazo (Sinha & Bawa, 2002). No caso da extração de cascas, a remoção de anéis inteiros do córtex caulinar, ao invés da extração parcial, provoca efeitos maiores (Guedje et al, 2003). Evidências como estas são usualmente levantadas por estudos experimentais, os quais mensuram por alguns anos os efeitos de diferentes manipulações.…”

Section: Partes Vegetaisunclassified

Efeitos ecológicos da exploração de produtos florestais não madeireiros: uma revisão sistemática

Brites

Morsello

2016

Desenvolv. Meio Ambiente

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Artigo recebido em 16 de novembro de 2015, versão final aceita em 23 de abril de 2016. RESUMO:A comercialização de produtos florestais não madeireiros (PFNM) é considerada estratégia que combina o desenvolvimento socioeconômico com baixo impacto ambiental. Porém, evidências demonstram que a exploração desses recursos pode provocar efeitos ecológicos negativos. Este estudo identificou os efeitos mais frequentes por meio de revisão sistemática de estudos empíricos, previamente submetidos a quatro critérios de inclusão e depois classificados conforme o tipo de PFNM explorado e os efeitos da exploração sobre 15 parâmetros em diferentes escalas biológicas. Os resultados indicaram que efeitos ecológicos negativos são frequentes, especialmente para a extração de cascas e folhas em grandes volumes, embora no curto prazo os efeitos possam ser nulos ou positivos. Os parâmetros mais frequentemente afetados foram: tamanho populacional; alterações nas partes vegetais; distribuição de classes de tamanho; probabilidade média de sobrevivência e riqueza de espécies. A constatação de que a atividade pode provocar efeitos ecológicos significativos evidencia a necessidade de sistemas de monitoramento e manejo.Palavras-chave: recursos florestais; efeitos ecológicos; extrativismo; revisão. ABSTRACT:Trade of non-timber forest products (NTFP) is a strategy that combines socioeconomic development with activities of low environmental impact. However, evidence suggests that harvesting these resources can produce negative ecological effects. This article identified the most common effects through a systematic literature review of empirical studies. Articles were previously evaluated against four criteria of inclusion, and were then classified according to the plant part harvested and the effects on 15 parameters at different levels of the biological organization. The results indicated that negative ecological effects are common, especially when harvesting barks and leaves in large volumes, although null and positive effects may also be observed. The parameters most frequently affected were population size; modifications in plant parts; age structure; probability of survival, and species richness. The evidence that NTFP harvest can cause significant ecological impacts calls for a need of monitoring and management systems.

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“…With the continual increase in demand for products derived from these species, traditional collection methods have gradually given way to irrational methods of collection [4]. Those woody species of great usefulness to local communities are threatened in their distribution areas because of pressure exerted on them and/or their habitats: Adansonia digitata [5], Afzelia africana and Khaya senegalensis [6], Garcinia lucida [7], Anogeissus leiocarpa [8], Pentadesma butyracea [9], and Prosopis africana [10] are edifying cases. The frequency of P. africana, for example, is becoming weaker in its range because of excessive overexploitation by cutting the stems and branches of it, which limits its natural regeneration capacity [11].…”

Section: Introductionmentioning

confidence: 99%

“…This is compounded by the fact that until today the species exists in natural stands and has not a planning study or regeneration study in Benin while structure, regeneration, and the likely risk of the disappearance of the species are still less studied. However, the acquisition of reliable data on the ecology, distribution, and the structure of a forest species are necessary for the development of an optimal development plan and conservation that are effective [7,25,26]. The purpose of this study is to describe the characteristics of dendrometric populations of P. africana in different plant communities for future development.…”

Section: Introductionmentioning

confidence: 99%

Structural Characterization ofProsopis africanaPopulations (Guill., Perrott., and Rich.) Taub in Benin

Houètchégnon

Gbemavo

Ouinsavi

et al. 2015

International Journal of Forestry Research

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The structural characterization of Prosopis africana of Benin was studied on the basis of forest inventory conducted in three different vegetation types (savannah, fallow, and field) and three climate zones. The data collected in 139 plots of 1000 m 2 each related to the diameter at breast (1.3 m above ground), total height, identification, and measurement of DBH related P. africana species height. Tree-ring parameters such as Blackman and Green indices, basal area, average diameter, height of Lorey, and density were calculated and interpreted. Dendrometric settings of vegetation type and climate zone (Guinea, Sudan-Guinea, and Sudan) were compared through analysis of variance (ANOVA). There is a significant difference in dendrometric settings according to the type of vegetation and climate zone. Basal area, density, and average diameter are, respectively, 4.47 m 2 /ha, 34.95 stems/ha, and 37.02 cm in the fields; 3.01 m 2 /ha, 34.74 stems/ha, and 33.66 cm in fallows; 3.31 m 2 /ha, 52.39 stems/ha, and 29.61 cm in the savannahs. The diameter distribution and height observed at the theoretical Weibull distribution show that the diameter and height of the populations of the species are present in all positively skewed distributions or asymmetric left, a characteristic of single-species stands with predominance of young individuals or small diameters or heights.

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Population dynamics of Garcinia lucida (Clusiaceae) in Cameroonian Atlantic forests

Cited by 47 publications

References 27 publications

Tree Species Diversity and Its Population and Regeneration Status in Homegardens of Upper Assam, Northeast India

Tree Species Diversity and Its Population and Regeneration Status in Homegardens of Upper Assam, Northeast India

Efeitos ecológicos da exploração de produtos florestais não madeireiros: uma revisão sistemática

Structural Characterization ofProsopis africanaPopulations (Guill., Perrott., and Rich.) Taub in Benin

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