Bois et Forets Des Tropiques最新文献

{"title":"Land use impacts on Boswellia dalzielii Hutch. an African frankincense tree in Burkina Faso","authors":"Prospère Sabo, A. Ouédraogo, D. Gbemavo, K. V. Salako, R. G. Glèlè Kakaï","doi":"10.19182/bft2021.349.a31960","DOIUrl":"https://doi.org/10.19182/bft2021.349.a31960","url":null,"abstract":"Boswellia dalzielii Hutch., an African frankincense tree, is a socio-economically important aromatic and medicinal tree. It is currently threatened by uncontrolled exploitation, and therefore requires action to ensure its sustainable management. This study assessed the population structure and regeneration of its natural stands across three land use types in Burkina Faso: woodlands, fallows and farmlands. Sixty, fifty and fifty 50 m × 20 m plots were established respectively in woodlands, fallows and farmlands. All the plots were surveyed for adult tree (dbh ≥ 5 cm) density, dbh, total height and health conditions. Data on regeneration density (dbh < 5 cm), source (generative, stem shoots, suckers), total height and collar diameter were also collected. The results show similar total tree heights (7.0 m-9.0 m) but significantly (p < 0.05) smaller tree dbh in woodlands (mean ± SD: 20.5 ± 0.49 cm) and fallows (29.3 ± 0.64 cm) than in farmlands (32.8 ± 0.15 cm). Adult tree density (trees/ha) was 1.3 and 2.7 times higher in woodlands (82.37 ± 6.57) than in fallows (62.00 ± 3.98) and farmlands (30.02 ± 1.63), respectively. The density of regeneration in woodlands was 28 and 6 times higher than in fallows and farmlands, respectively. The majority (> 50%) of regenerating plants were suckers and no seedling regeneration was found in farmlands. The distribution of trees in diameter classes was J-shaped in woodlands, bell-shaped in farmlands and positive asymmetric in fallows, indicating recruitment bottlenecks. We found that 80.18% of individuals encountered were unhealthy. Intensive debarking and cutting were the main threats to the species and no conservation strategy was in place in the study region. We suggest measures to reduce intensive debarking and cutting, which should contribute to better management of the species.","PeriodicalId":55346,"journal":{"name":"Bois et Forets Des Tropiques","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67981265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term effects of shade and input levels on coffee yields in the Pacific region of Nicaragua","authors":"A. López-Sampson, N. Sepúlveda, M. Barrios, E. Somarriba, R. Munguia, P. Moraga, A. Ponce, Luis Orozco-Aguilar, E. Navarrete, L. Navarrete","doi":"10.19182/BFT2020.346.A36292","DOIUrl":"https://doi.org/10.19182/BFT2020.346.A36292","url":null,"abstract":"The suitability and profitability of coffee cultivation in Central America are at risk due to pest and disease outbreaks, price fluctuations and climate change. Proper shading is claimed to be one of the most promising practices to seek sustainability and better adapt coffee cultivation to climate change in marginal areas. This study recorded and compared coffee cherry yields over a ten-year period from shaded coffee (N-fixing-trees and timber trees) agroforestry systems under different management regimes (conventional vs. organic) in a suboptimal site. Significant differences in production were detected between conventional inputs vs. combination of organic inputs and shade types in some years of the evaluation period. Full-sun cultivation under intensive management was the most productive system for coffee yields, followed by shaded systems under timber trees. Interestingly, and regardless of management systems (intensive conventional or intensive organic) the worst combinations in terms of coffee yield were shaded systems under leguminous species (Inga laurina (Sw.) Willd. + Simarouba glauca DC.). Across all experimental plots, the timber species Simarouba glauca and Tabebuia rosea (Bertol.) DC. grew well, reaching a mean annual increment in diameter of 2.5-3.3 cm/year (age 12 years). Average gross revenues were higher in full-sun and timber-shaded agroforestry systems. Overall, intensive management regimes were the most expensive cultivation system to run but also the best in terms of coffee yield performance.","PeriodicalId":55346,"journal":{"name":"Bois et Forets Des Tropiques","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49375877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Commerce des bois tropicaux","authors":"Ctft Cirad","doi":"10.19182/bft1973.150.a36287","DOIUrl":"https://doi.org/10.19182/bft1973.150.a36287","url":null,"abstract":"Note sur le marché de l'OkouméLa situation de l'approvisionnement du marchéde l'Okoumé n'a fait que s'aggraver depuis notredernière revue de ce sujet.A fin juillet les réceptions par l'Office du Gabonétaient inférieures de 43. 000 tonnes aux prévisionset les perspectives des cinq derniers mois n'étaientguère favorables à tel point que les contrats d'exportationont dû être réduits à 85 % de leurmontant initial.Dans ces conditions il est trop tôt pour évoquerles possibilités de 197 4, mais la reprised'activité en septembre-octobre, l'évolution descours des Bois Divers africains, et l'impactdes arrivages de bois d'Extrême-Orient, donnerontd'ici deux mois de précieuses indicationssur l'évolution probable de la demandeen 1974.Note sur le marché des bois exotiques et tropicauxBien qu' officiellement la période des congés soitterminée, la reprise d'activité est trop récente ettrop brève pour noter des modifications importantespar rapport au calme et à la stabilité descours que nous avons connus depuis deux mois,malgré qu'à l'image de la Côte-d'Ivoire, les Gouvernementsdu Cameroun et du Gabon aient décrétécourant juillet une augmentation des taxes de sortie.Cependant, il est à craindre que la reprise normalede septembre soit différée d'un mois pourdeux raisons principales chargements très importantsdurant juillet/août d'où création de stocksdans les ports européens, et le coût extrêmementimportant de l'argent, coût devenant tel qu'il està prévoir que, contrairement à l'habitude, lesmarchés attendront le tout dernier moment pourrenouveler leurs stocks et leurs contrats.Les trois derniers mois de l'année devraient doncs'annoncer relativement calmes dans leur ensembleavec des cours qui devraient enfin connaître lastabilisation pour le plus grand bien de l'ensemblede la profession.","PeriodicalId":55346,"journal":{"name":"Bois et Forets Des Tropiques","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48142962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Control over decision-making in eight major oil palm plantation companies in Malaysia","authors":"N. Kamaruddin","doi":"10.19182/bft2020.345.a31901","DOIUrl":"https://doi.org/10.19182/bft2020.345.a31901","url":null,"abstract":"Southeast Asia's mosaics of agricultural and tropical forest landscapes have been significantly shaped by the advance of industrial plantations from colonial times to the present. Controversies over deforestation and oil palm sustainability have emerged in this context. Significant land use changes have been made by industrial plantation companies, which have diversified their activities to sectors ranging from automobiles to banking and telecoms to become corporate giants. \u0000The solutions proposed today to curb deforestation for oil palm plantations consist of sectoral market tools such as trade bans, regulations or certification schemes that are supposed to influence the economic decisions of private companies. However, oil palm corporations are so diversified and deeply embedded in national economies that many other factors could influence their corporate decision-making. Studies since Porter and Laporta suggest that the structure of the financial network of company shareholders may have more influence on corporate decisions than the market itself, in other words that the nature of company ownership (government versus private sector) is the essential driver in corporate decision-making. \u0000This thesis explores how these structural drivers play out in major oil palm corporations.  Using network analysis, we quantified and analysed shareholdings in the main oil palm corporations in Malaysia. We gathered data on 4,331 shareholdings at ten different levels. The study describes the financial topologies and compares them with the nature of company ownership and with measurable decision-making processes, such as structural control and decision loads. \u0000We found that decision-making was not influenced by the nature of ownership but was very much influenced by the financial structure of the corporations. We also found that decision loads and structural control seem to predict a structural flexibility which is intrinsic to these corporations. \u0000The implications of these findings could help to rethink the political governance of deforestation and open up a new field of research concerned with describing and analysing the deep financial structures that govern the behaviour of corporations. Firstly, understanding the financial forces that shape plantation companies is critical to oil palm and forest sustainability. Secondly, we can now identify and prioritize the most resilient corporations with a view to developing sustainable practices for the long term.","PeriodicalId":55346,"journal":{"name":"Bois et Forets Des Tropiques","volume":"37 1","pages":"101-102"},"PeriodicalIF":0.6,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88550315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phytodiversité et services écosystémiques associés aux plantations d’alignement des rues aménagées de la ville de Grand-Popo au Bénin","authors":"Abdel Aziz Osseni, G. H. F. Gbesso, Karl Martial Nansi, A. Tente","doi":"10.19182/bft2020.345.a31808","DOIUrl":"https://doi.org/10.19182/bft2020.345.a31808","url":null,"abstract":"The importance of urban vegetation in generating ecosystem services in general has been widely demonstrated. In Benin, as well as the social and ecological benefits attributed to avenue trees, they also contribute significantly to the provision of supply and socio-cultural services via a range of uses by the population. This study assesses the contribution of plant biodiversity in city streets to the supply of goods and services to residents of Grand-Popo in Benin. The methodological approach used involved counting the number of trees planted along ten kilometres of managed roadways and conducting interviews with 164 households on the services provided by these trees. The diversity parameters were calculated to assess phytodiversity along these roadways. A table was complied to show the types of uses of tree organs in relation to existing ecosystem service categories. A total of 540 trees, belonging to 26 species and 17 families, were counted along the main streets of the city. Shannon's average biodiversity index (3.61 ± 0.14 bits) and the Pielou index of evenness (0,76 ± 0,06) show that some species are dominant, the most representative of these being Cocos nucifera with 20 % of total individuals. These avenue trees were mainly planted by the public authorities for shade, ornamental and carbon sequestration purposes. In practice, the uses made of these trees and the introduction of new species that are useful to the adjacent populations equate to the provision of more than nine ecosystem services, with shade and food rated as particularly important. To develop urban forestry, this kind of information would help to promote ecosystem services without compromising the viability of urban tree plantations.","PeriodicalId":55346,"journal":{"name":"Bois et Forets Des Tropiques","volume":"65 1","pages":"87-99"},"PeriodicalIF":0.6,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73835139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards better estimates of carbon stocks in Borneo's logged-over Dipterocarp forests","authors":"A. Rozak","doi":"10.19182/BFT2020.345.A31940","DOIUrl":"https://doi.org/10.19182/BFT2020.345.A31940","url":null,"abstract":"Tropical forests are a major reservoir of biodiversity and carbon (C), playing a pivotal role in global ecosystem function and climate regulation. However, most of the tropical forests, especially Bornean forests in Southeast Asia, are under intense pressure and threatened by anthropogenic activities such as logging, mining industry, agriculture and conversion to industrial plantation. In 2010, the area of production forests in Borneo was 26.8 million ha (approx. 36% of the total land area of Borneo) including 18 million ha (approx. 24%) of logged forests. Production forests are thus emerging as a dominant land-use, playing a crucial role in trading-off provision of goods and maintenance of ecosystem services, such as C and biodiversity retention. Selective logging is known to reduce both above- and below-ground biomass through the removal of a few large trees, while increasing deadwood stocks through collateral damages. By creating large gaps in the canopy, microclimates in the understory and on the forest floor change locally speeding up the decomposition of litter and organic matter. The extent of incidental damages, canopy openness, as well as the speed of C recovery, was shown to be primarily related to logging intensity. However, empirical evaluations of the long-term effect of logging intensity on C balance in production forests remain rare. The present thesis aims to assess the long-term effect of logging intensity on C sequestration in a north Bornean Dipterocarp forests (Malinau District, North Kalimantan) logged in 1999/2000. Five main C pools, namely above-ground (AGC) and below-ground (BGC) carbon in living trees, deadwood, litter, and soil organic carbon (SOC) were estimated along a logging intensity gradient (ranging from 0 to 57% of initial biomass removed). Our result showed that total C stocks 16 years after logging, ranged from 218-554 Mg C ha-1 with an average of 314 Mg C ha-1. A difference of 95 Mg C ha-1 was found between low logging intensity ( 19%). Most C (approx. 77%) was found in living trees, followed by soil (15%), deadwood (6%), and a minor fraction in litter (1%). The imprint of logging intensity was still detectable 16 years after logging, and logging intensity thus was the main driver explaining the reduction of AGC&gt;20, BGC&gt;20, deadwood, and total C stocks and an increase in deadwood. Solely, logging intensity explained 61%, 63%, 38%, and 48% of variations of AGC&gt;20, BGC&gt;20, deadwood, and total C stocks, respectively. Logging intensity also significantly reduced SOC stocks in the upper 30 cm layer. For total SOC stocks (0-100 cm), the negative influence of logging intensity was still perceptible, being significant in conjunction with other variables. Our results quantify the long-term effect of logging on forest C stocks, especially on AGC and deadwood. High logging intensity (50% reduction of initial biomass) reduced total C stocks by 27%. AGC recovery was lower in high logging intensity plots, suggesting lowered","PeriodicalId":55346,"journal":{"name":"Bois et Forets Des Tropiques","volume":"93 1","pages":"101-102"},"PeriodicalIF":0.6,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75454211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biodiversité et services écosystémiques en forêts tropicales : le rôle des affectations des terres forestières dans la région du Dja, Cameroun","authors":"Simon Lhoest","doi":"10.19182/bft2020.345.a31949","DOIUrl":"https://doi.org/10.19182/bft2020.345.a31949","url":null,"abstract":"In central Africa, tens of millions of people depend on tropical forests for their livelihoods. The biodiversity of these ecosystems is unique and provides important ecosystem services (ES), which can vary depending on management strategies. For this PhD thesis, we assessed biodiversity and ecosystem services in the Dja landscape in Cameroon forests classified into three forest land allocations use: a protected area, an FSC-certified logging concession and three community forests. First, we assessed the forest conservation value based on the species richness and composition of two taxonomic groups, mammals and dung beetles. The largest and most threatened species were detected in the protected area and in the most remote areas in the logging concession, which are better preserved from human influence. In contrast, the community forests seemed to be particularly lacking in fauna and degraded due to their proximity to roads and villages, but these cover much smaller areas and still have a closed canopy. Secondly, interviews identifying the perceptions of ES supply showed that provisioning and cultural services are the most important ES for local populations, in contrast to regulating services which were barely mentioned. Among the former, bushmeat was the only service for which the forest supply is not sufficient for local populations. Thirdly, combining interviews and field surveys, we quantified the use by local populations of eight provisioning and cultural ES. We found that firewood and timber are used sustainably by local populations, whereas bushmeat hunting and consumption exceed sustainability thresholds. Reconciling wildlife conservation, food security, and sustainable hunting practices is a major challenge in central Africa. To address this challenge it is crucial to include all stakeholders in sustainable forest management strategies, in order to identify the social levers that can underpin behavioural changes among forest users.","PeriodicalId":55346,"journal":{"name":"Bois et Forets Des Tropiques","volume":"46 1","pages":"105-106"},"PeriodicalIF":0.6,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80956500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Variabilité démographique de Saba senegalensis (A. DC.) Pichon suivant le gradient climatique au Burkina Faso","authors":"Blaise Kabré, Mamounata O. Belem, Ouédraogo, B. Lankoandé, A. Ouédraogo","doi":"10.19182/bft2020.345.a31930","DOIUrl":"https://doi.org/10.19182/bft2020.345.a31930","url":null,"abstract":"Saba senegalensis (A. DC.) Pichon, also known as the weda vine, is a woody vine from the Apocynaceae family. The non-timber forest products obtained from this species are of major socio-economic importance in Burkina Faso, but its demographic characteristics are little known despite their importance for the implementation of sustainable management programmes. This study assessed the demographic characteristics of S. senegalensis according to the climate gradient in Burkina Faso. Targeted random sampling was used to establish 1,000 m2 plots for a population inventory. Dendrometric measurements of stem diameter were made at the root collar and at 1.30 m above the ground for adult individuals, 20 cm from the ground for young plants and at the root collar for seedlings. The Green index, density, average stem diameter and basal area were calculated and comparisons made between climatic zones. The results showed a clumped distribution of S. senegalensis according to the Green index. Density, average diameter and basal area varied significantly (p < 0.05) between climatic zones. High densities of adult S. senegalensis are found in the Sahelian and Sudanian zones. The general linear model shows that temperature and precipitation have an influence on the establishment and regeneration of S. senegalensis. The demographic structure shows an abundance of juvenile plants with high potential for the renewal of populations. Although S. senegalensis populations show a degree of resilience, the deteriorating climate and human pressures are jeopardising the conservation of the species in its natural habitat.","PeriodicalId":55346,"journal":{"name":"Bois et Forets Des Tropiques","volume":"13 1","pages":"75-85"},"PeriodicalIF":0.6,"publicationDate":"2020-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89339918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbonization techniques and wood species influence quality attributes of charcoals produced from industrial sawmill residues in Eastern Cameroon","authors":"Joseph Zobo Mfomo, A. Biwôlé, Evariste Fedoung Fongzossie, Gilbert Tsoh Ekassi, D. Hubert, Hugues Ducenne, J. Tamba, R. Mouangue","doi":"10.19182/bft2020.345.a31831","DOIUrl":"https://doi.org/10.19182/bft2020.345.a31831","url":null,"abstract":"Cameroon harvests a considerable volume of round wood each year, only a small part of which is used for manufactured products. In recent decades, various charcoal-making initiatives have emerged around industrial timber-processing units, particularly in the eastern region, in order to develop a market for residual biomass. However, the undifferentiated use of these residues obtained from different species often results in products with varying energy potential that are not always appreciated by consumers. Moreover, the physical and chemical characteristics of the charcoal produced are unknown, as are the factors that influence its quality. The aim of this study was to assess the variability of the physical and chemical properties of charcoal produced from industrial sawmill residues in the eastern region of Cameroon using different carbonisation techniques. Three wood species, Ayous, Frake and Movingui, and three types of kilns (traditional, improved traditional and Casamance system) were used. For each species, three bundles of five pieces of wood each were prepared, with an initial moisture content ranging from 28% to 36%. The physical and chemical properties determined were moisture content, apparent density, volatile matter content, fixed carbon content, ash content and Higher Heating Value (HHV). Our results showed that the charcoal properties varied depending on the wood species and types of kilns used. Movingui, with the highest density (0.73 g/cm3), produced charcoal with the lowest moisture content (4.03%) and the highest apparent density (0.42 g/cm3). The lowest volatile matter content (20.32%), the lowest ash content (1.27%) and the highest fixed carbon content (74.95%) were also obtained with this species. All these values were obtained with Movingui charcoal produced with the Casamance system. However, the highest HHV (32.51 MJ/kg) was obtained with charcoal from Ayous, also produced with the Casamance system. On comparing the three charcoaling systems used, the Casamance model yielded the best physical and chemical charcoal properties. All the charcoals studied complied with FAO standards for cooking fuel. The highest HHV obtained with charcoal from Ayous hardwood shows its ability to release large amounts of thermal energy during combustion. \u0000  \u0000Keywords: Charcoal, carbonization technologies, eastern Cameroon, physicochemical properties, industrial sawmills wastes.","PeriodicalId":55346,"journal":{"name":"Bois et Forets Des Tropiques","volume":"3 1","pages":"65-74"},"PeriodicalIF":0.6,"publicationDate":"2020-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82171400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genetic diversity of ten Moroccan populations of Tetraclinis articulata as revealed by Inter Simple Sequence Repeat (ISSR) markers","authors":"Meryem Makkaoui, Y. Abbas, Salwa El Antry-Tazy, L. Medraoui, M. Alami, Selouka Rabani, A. Filali-Maltouf","doi":"10.19182/bft2020.345.a31927","DOIUrl":"https://doi.org/10.19182/bft2020.345.a31927","url":null,"abstract":"Tetraclinis articulata (Vahl) Masters is one of Morocco's most important forest species. It is also found occasionally in Malta and Spain, showing significant adaptability to different bio-climatic conditions. However, the species is being affected by anthropogenic fragmentation, logging and neglect from authorities, which could lead to the irretrievable loss of this resource. In this study, the genetic diversity and genetic structure of ten Moroccan populations of T. articulata were assessed. Fifteen Inter-Simple Sequence Repeat (ISSR) markers were used. These generated 271 polymorphic fragments with an average of 18.06 per primer and showed 79.59% of polymorphism. The 129 individuals revealed a high level of genetic diversity (Hs = 0.221; Ht = 0.254) and 85% of genetic variation within populations. However, the genetic differentiation level was low (Gst = 0.13), which is consistent with the lack of correlation between genetic and geographic distances revealed by the Mantel test, resulting in a high level of gene flow (Nm = 3.294). Based on PCoA and neighbour-joining methods, the ten populations clustered under the effect of continental and marine climates. Compared with other conifers, the current genetic diversity and the pattern of T. articulata population structure indicate an important gene pool requiring efficient conservation strategies.","PeriodicalId":55346,"journal":{"name":"Bois et Forets Des Tropiques","volume":"117 1","pages":"15-25"},"PeriodicalIF":0.6,"publicationDate":"2020-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77236601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}