Thematische Bibliographien / Forests and forestry – algeria

Auswahl der wissenschaftlichen Literatur zum Thema „Forests and forestry – algeria“

Autor: Grafiati

Veröffentlicht am 27. Juli 2024

Zuletzt aktualisiert am 29. Juli 2024

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Zeitschriftenartikel zum Thema "Forests and forestry – algeria"

Merdas, Saifi, Tewfik Mostephaoui und Mohamed Belhamra. „Reforestation in Algeria: History, current practice and future perspectives“. REFORESTA, Nr. 3 (01.07.2017): 116. http://dx.doi.org/10.21750/refor.3.10.34.

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Reforestation in Algeria has been recognized as a priority in different programs for the development and enhancement of forest heritage. Degradation factors of forest and soil contribute significantly to the decline in land values. The Algerian forests in the past, during the colonial period suffered considerable degradation. The degraded forest heritage has been undertaken with serious programs since independence. Several programs for the development of the forest sector through reforestation have been carried out. Unfortunately, the achievements were still below expectations. The launch of the National Reforestation Plan in 2000 has given the forestry sector a new lease of life with a vision that incorporates the productive aspect of reforestation, the industrial aspect, and the recreational aspect. Before the end of the NRP timeline, significant reforestation projects are completed. In a future projection, reforestation is integrated into the land use planning within the framework of the National Plan of Land Use Planning.

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Ksentini, Hana, Meddad-Hamza Amel und Beddiar Arifa. „Degradation of mycorrhizal fungal communities associated with cork oak and understory vegetation by the anthropogenic factors“. Folia Forestalia Polonica 64, Nr. 3 (01.09.2022): 184–94. http://dx.doi.org/10.2478/ffp-2022-0018.

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Abstract The cork oak (Quercus suber L.) forests are ecosystems of high environmental and socioeconomic value in the Mediterranean basin. However, in Algeria, the cork oak forests are highly threatened by repeated fires, overgrazing and the anthropogenic pressure that weaken the ecosystem of cork oak and affect its natural regeneration. This degradation results in an alteration of many ecological components of the cork oak, such as fungal communities in the soil. Thus, the aim of this work is to study the effects of cork oak stand degradation on the diversity of mycorrhizal communities associated with Quercus suber and some of its understory shrubs (Cistus monspeliensis, Lavandula stoechas and Thymus vulgaris) in the forest of Brabtia (northeastern Algeria).For this purpose, two sites were chosen: one degraded by the anthropogenic factors and the other non-degraded one. Moreover, it is suggested that some plants of the understory shrub vegetation of cork oak, such as the cistus, lavender and thyme, prove to be favourable to the juvenile growth of this tree. The results obtained showed that the ectomycorrhizal (EcM) root colonization of cistus was higher compared to that of cork oak in both stations. The estimation of arbuscular mycorrhizal (AM) colonization showed significantly higher levels in the roots of cork oak, cistus, lavender and thyme in the degraded station compared with the non-degraded stations. In contrast, the rhizosphere soils of cork oak and cistus had low number of AM propagules and fungal spores, while under the roots of lavender and thyme, these two parameters were greatly improved with the abundance of the genera Glomus and Gigaspora. These results underline the need to take into account the plant–fungus interactions in the development of restoration strategies of the degraded soils and forest ecosystems.

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Louail, Amal, François Messner, Yamna Djellouli und Rachid Gharzouli. „Remote Sensing and Phytoecological Methods for Mapping and Assessing Potential Ecosystem Services of the Ouled Hannèche Forest in the Hodna Mountains, Algeria“. Forests 13, Nr. 8 (22.07.2022): 1159. http://dx.doi.org/10.3390/f13081159.

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Regardless of their biogeographic origins or degree of artificialization, the world’s forests are a source of a wide range of ecosystem services (ES). However, the quality and quantity of these services depend on the type of forest studied and its phytogeographic context. Our objective is to transpose the concept of ES, in particular, the assessment of forest ES, to the specific Mediterranean context of the North African mountains, where this issue is still in its infancy and where access to the data needed for assessment remains difficult. Our work presents an introductory approach, allowing us to set up methodological and scientific milestones based on open-access remote sensing data and already tested geospatial processing associated with phytoecological surveys to assess the ES provided by forests in an Algerian study area. Specifically, several indicators used to assess (both qualitatively and quantitatively) the potential ES of the Ouled Hannèche forest, a forest located in the Hodna Mountains, are derived from LANDSAT 8 OLI images from 2017 and an ALOS AW3D30 DSM. The qualitative ES typology is jointly based on an SVM classification of topographically corrected LANDSAT images and a geomorphic-type classification using the geomorphon method. NDVI is a quantitative estimator of many plant ecosystem functions related to ES. It highlights the variations in the provision of ES according to the types of vegetation formations present. It serves as a support for estimating spectral heterogeneity through Rao’s quadratic entropy, which is considered a relative indicator of biodiversity at the landscape scale. The two previous variables (the multitemporal NDVI and Rao’s Q), completed by the Shannon entropy method applied to the geomorphon classes as a proxy for topo-morphological heterogeneity, constitute the input variables of a quantitative map of the potential supply of ES in the forest determined by Spatial Multicriteria Analysis (SMCA). Ultimately, our results serve as a useful basis for land-use planning and biodiversity conservation.

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Younsi, Salah Eddine, Yasmine Adjami, Rym Ghanem, Billel Bouchaib und Mohamed Laid Ouakid. „Impact of different factors degrading cork oak stands in the Mediterranean region: A case study from Algeria“. Journal of Forest Science 67, No. 12 (17.12.2021): 570–81. http://dx.doi.org/10.17221/77/2021-jfs.

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In recent years, the cork oak forests that characterise the Mediterranean region have been exposed to various factors that result in their degradation. These cork oak trees, due to increasingly accentuated anthropogenic activity, undergo withering at different scales.The objective of the study is to assess the impact of various factors that degrade cork oak forests in the Mediterranean region located in northeastern Algeria, and this was achieved by prospecting 22 sampling locations. This allowed the creation of a database containing 745 trees that were observed and 27 measured variables. Different readings were then taken into consideration based on measurements and sometimes on ratings. The impact of several biotic and abiotic factors, which affect and damage the health of cork oak, was identified. These factors include in particular the infestations by xylomycetophagous insects such as Platypus cylindrus and Xyleborus sp., which can potentially infest the cork oak trees that we observed one year after bark harvesting. On the other hand, the stationary descriptors such as altitude, slope, exposure, etc., are important for the dendrometric and exploitation characteristics, but their unfavourable values do not necessarily lead to tree mortality; for example, medium to low slopes, associated with average altitudes of 600 m a.s.l., may ensure the healthiest trees like in our case study. Finally, we were able to find that certain decline factors may affect a particular category of trees, either because they are older, taller or have a large girth, or because they are subject to inadequate debarking.

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Camarero, J. Julio, Raúl Sánchez-Salguero, Montserrat Ribas, Ramzi Touchan, Laia Andreu-Hayles, Isabel Dorado-Liñán, David M. Meko und Emilia Gutiérrez. „Biogeographic, Atmospheric, and Climatic Factors Influencing Tree Growth in Mediterranean Aleppo Pine Forests“. Forests 11, Nr. 7 (06.07.2020): 736. http://dx.doi.org/10.3390/f11070736.

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There is a lack of knowledge on how tree species respond to climatic constraints like water shortages and related atmospheric patterns across broad spatial and temporal scales. These assessments are needed to project which populations will better tolerate or respond to global warming across the tree species distribution range. Warmer and drier conditions have been forecasted for the Mediterranean Basin, where Aleppo pine (Pinus halepensis Mill.) is the most widely distributed conifer in dry sites. This species shows plastic growth responses to climate, being particularly sensitive to drought. We evaluated how 32 Aleppo pine forests responded to climate during the second half of the 20th century by using dendrochronology. Climatic constraints of radial growth were inferred by fitting the Vaganov–Shashkin (VS-Lite) growth model to ring-width data from our Aleppo pine forest network. Our findings reported that Aleppo pine growth decreased and showed the highest common coherence among trees in dry, continental sites located in southeastern and eastern inland Spain and Algeria. In contrast, growth increased in wetter sites located in northeastern Spain. Overall, across the Aleppo pine network tree growth was enhanced by prior wet winters and cool and wet springs, whilst warm summers were associated with less growth. The relationships between site ring-width chronologies were higher in nearby forests. This explains why Aleppo pine growth was distinctly linked to indices of atmospheric circulation patterns depending on the geographical location of the forests. The western forests were more influenced by moisture and temperature conditions driven by the Western Mediterranean Oscillation (WeMO) and the Northern Atlantic Oscillation (NAO), the southern forests by the East Atlantic (EA) and the august NAO, while the Balearic, Tunisian and northeastern sites by the Arctic Oscillation (AO) and the Scandinavian pattern (SCA). The climatic constraints for Aleppo pine tree growth and its biogeographical variability were well captured by the VS-Lite model. The model performed better in dry and continental sites, showing strong growth coherence between trees and climatic limitations of growth. Further research using similar broad-scale approaches to climate–growth relationships in drought-prone regions deserves more attention.

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Bouzid, A., K. Bouzid und K. Benabdeli. „Contribution the Failure Mode Analysis and Criticality Evaluation Method to the Rehabilitation of Cork Oak (Quercus suber) Forests in Forest Massif of Tlemcen (Algeria)“. Jurnal Manajemen Hutan Tropika (Journal of Tropical Forest Management) 28, Nr. 2 (09.08.2022): 191–200. http://dx.doi.org/10.7226/jtfm.28.2.191.

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The controling of forest sustainability and preforest ecosystems in achieving stability of forest ecosystem require the identification of biophysical indicators, anthropological, and technological. The significant degradation of Quercus suber formations in forest massif of Tlemcen (Algeria) are imposed by both climatic factors, the fires, the overgrazing land, anthropogenic aggression as well as by ineffective management. The making of a reference matrix would make possibility the identification of probable hazards and risks. This study aimed to identify the understanding how the mode of operation of a system to identify failures and treat, and the create the intention of eliminating or minimizing the associated risks. This matrix will consist of relevant indicators which easy guide to estimate and following the understanding of the forest degradation process in Algeria. The FMECA method allowed identification of 20 main defective targets which be grouped into 3 categories namely: technical, ecological, organizational, and facilitate of remediation. Each error can be scored and action plans can be prioritized, allowing different with all forest sector players to better understand the degradation of this natural space in order to implement efficient and appropriate remediation plans.

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Sarmoum, Mohamed, J. Julio Camarero und Fatiha Abdoun. „Aridification increases growth resistance of Atlas cedar forests in NW Algeria“. Forest Ecology and Management 556 (März 2024): 121730. http://dx.doi.org/10.1016/j.foreco.2024.121730.

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Meddah, Fadéla, und Najat Zatla. „La Valorisation Des Ressources Forestières Au Niveau De La Wilaya De Saida“. European Scientific Journal, ESJ 14, Nr. 18 (30.06.2018): 138. http://dx.doi.org/10.19044/esj.2018.v14n18p138.

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The forestry economy tends to become a privileged way of development, making it possible to offer to the territories in mutation an alternative means of production. Algeria has been trying since 2008 (in accordance with the master plan for natural areas and protected areas) a forest policy that takes into account the multiple roles that the forest can play : protection, production and social promotion. This work aims to study the process of valorization of forest resources in territory of Saida. The process is based mainly on two advances : the exhaustive identification of resources and the development of valorization mode. These advances can not be maintained, unless, a territorial dynamic associating the actors of the sector of the forests and the actors of the territory, will be created. An entry by the territory, the resources and territorial development is privileged. This theoretical entry is illustrated by a comprehensive approach based on the analysis of stakeholder surveys and articulated with quantitative analysis. This analysis conclude that the territorial dynamics are absent at the level of the territory , which has led to an under-exploitation of resources.

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Sebti, Safia, Luís Bonifácio und Gahdab Chakali. „Role of Egg Parasitoids in Controlling the Pine Processionary Moth in the Cedar Forests of Chréa National Park (Algeria)“. Forests 13, Nr. 2 (31.01.2022): 211. http://dx.doi.org/10.3390/f13020211.

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The sustainable protection of cedar stands in Chréa National Park can only be accomplished through the stability of the ecosystem. Outbreaks of Thaumetopoea pityocampa are a major threat and are largely attributed to the high population fecundity, changes in the diversity of natural enemies and global interactions within the ecosystem. Egg parasitoids (Hymenoptera) are essential in the biological control of T. pityocampa. To assess the impact of the parasitoids on the populations of the pine processionary moth, egg masses from cedar plantations were collected, reared in a laboratory and checked regularly for the emergence of the egg parasitoids: Trichogramma embryophagum, Baryscapus servadeii and Ooencyrtus pityocampa. Observations showed an inter-annual variation in the abundance of the three parasitoids as a result of the variation in the population density of the processionary moth, and on the underlying effect of temperature. Parasitoids had variable parasitism rates, with yearly averages ranging from 3.86% to 51.14%, dependent on the spatiotemporal distribution of the host populations. The aggregate effect of multiple parasitoid species could optimize control of T. pityocampa in cedar stands.

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Benguerai, Abdelkader, Khéloufi Benabdeli und Abdelkader Harizia. „Forest Fire Risk Assessment Model Using Remote Sensing and GIS Techniques in Northwest Algeria“. Acta Silvatica et Lignaria Hungarica 15, Nr. 1 (01.06.2019): 9–21. http://dx.doi.org/10.2478/aslh-2019-0001.

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Abstract Algeria loses more than 20,000 hectares of forest to fire every year. The losses are costly both in terms of life and property damage, which weighs heavily on the environment and the local economy. Geomatics can complement the conventional methods used in fire hazard prevention and management. The objective of our study is to use the geographic information system (GIS) and the Remote Sensing (RS) technology to develop the fire risk assessment map of the forest massif of Zelamta located in Southeast Mascara province (Northwest Algeria). The methodology employed was an empirical model involving three parameters that can control fire behaviour: geomorphology, vegetal cover combustibility, and human activity. The obtained results can help in the decision-making process as well as provide cartographic support for forest fire prevention and management.

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Dissertationen zum Thema "Forests and forestry – algeria"

Camagni, Francesca <1984&gt. „q-Hook length formulas for colored labeled forests“. Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/7026/1/Camagni_Francesca_tesi.pdf.

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The major index has been deeply studied from the early 1900s and recently has been generalized in different directions, such as the case of labeled forests and colored permutations. In this thesis we define new types of labelings for forests in which the labels are colored integers. We extend the definition of the flag-major index for these labelings and we present an analogue of well known major index hook length formulas. Finally, this study (which has just apparently a simple combinatoric nature) allows us to show a notion of duality for two particular families of groups obtained from the product G(r,n)×G(r,m).

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Camagni, Francesca <1984&gt. „q-Hook length formulas for colored labeled forests“. Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/7026/.

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Zhu, Pengyu Zhang Yaoqi. „Demand for urban forests a national and regional study /“. Auburn, Ala., 2006. http://hdl.handle.net/10415/1325.

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Peach, Kris Elizabeth. „Accounting for forests“. Thesis, Queensland University of Technology, 1994. https://eprints.qut.edu.au/36390/1/36390_Peach_1994.pdf.

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There is a lack of accounting guidance in Australia relating to accounting for forests. Forest accounting provides some unique challenges which existing historical cost based accounting methods do not address. Forests have a significant growth period with revenue being received many years after the majority of expenditure is incurred. They are also assets which appreciate in value from growth. Existing accounting practices in Australia are diverse. Consequently this raises the issue of whether comparability of entities within the industry is possible. The purpose of this thesis is to examine existing forest accounting practice in Australia and to recommend an accounting method to assist in improving comparability between entities and in providing users with more meaningful information on which to base decisions regarding the allocation of scarce resources. The recommended accounting method depends upon the merchantable status of the forest. The accounting method which best enables measurement of entity performance and accounting for appreciation in value of forest assets is the current valuation method. This method requires annual revaluations of the forest. However, the valuation must be capable of reliable determination and verification to enable recognition in the balance sheet. The current valuation method is recommended for forests of merchantable age. Forests of less than merchantable age are difficult to value accurately because of the uncertainty regarding major assumptions such as physical growth, rotation age, and stumpage prices. The recommended method of accounting for immature forests is the cost compounding method. This method records the forest asset at historical cost, compounded by a factor representing the opportunity cost of capital to allow for the forest growth. Until the forest reaches merchantable age, the increment in valuation should be recorded in an asset revaluation reserve as the gains are not capable of realisation and it is not consistent with current accounting practice to recognise changes in valuation where the product is not in a readily realisable form. The recommended method of recognising the changes in valuation for a forest of merchantable age is direct recognition in the profit and loss account. Income from timber sales should be off set against the value of the forest asset, as it does not represent revenue but a direct exchange of assets which involves no profit factor. When a forest has not yet reached merchantable age, and the cost compounding method is applicable, the recommended method of revenue recognition is to take the change in valuation to an asset revaluation reserve. Until the timber reaches a merchantable age, the gains are not capable of realisation and it is not consistent with current accounting practice to recognise changes in valuation where the product is not in a readily realisable form. Growing timber should be classified as inventory where the timber is held for the purpose of sale in the ordinary course of business. Where the forest is held for sale rather than the timber within the forest, the forest should be classified as an investment. The recommended disclosures in relation to accounting for forests include disclosure of: revenue· recognition method; asset measurement method; treatment of expenditure; treatment of interest; definition of merchantable age; valuation methodology, including specie of timber, age profile of the forest, discount rate and other major assumptions; and insurance cover. Whilst the recommendations appear a departure from existing, accounting conventions, the majority of the industry are already obtaining current valuations on a regular basis, and precedents have been established for the recognition of the changes in valuation to be recorded directly in the profit and loss account with AAS 25: Financial Reporting by Superannuation Plans and AASB 1023: Financial Reporting by General Insurance Activities. The recommended method of accounting does not contravene existing accounting standards as forests are excluded from the operations of AASB 1010: Revaluation of Non-Current Assets and AASB 1019: of Inventories in the Context of Measurement and Presentation the Historical Cost System.

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Larson, Chad J. „Modeling forest transition pathways for decision making in private forestry“. Diss., Columbia, Mo. : University of Missouri-Columbia, 2004. http://hdl.handle.net/10355/4105.

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Thesis (M.S.) University of Missouri-Columbia, 2004.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (June 30, 2006). Vita. Includes bibliographical references.

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Lele, Dorothy Carleton University Dissertation International Affairs. „Common resource development: community forestry in Maharashtra, India“. Ottawa, 1988.

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Thrower, James S. „Model-dependent sampling for timber value in old-growth forests of coastal British Columbia“. Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/31308.

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The procedure used to sample crown timber before harvesting in B.C. is designed to estimate net volume per ha using systematically located angle-count plots where trees are selected with probability proportional to basal area. The primary purpose of the sample is to provide information for timber valuation and stumpage appraisal. Timber value is the most important population parameter for stumpage calculation, but it is not explicitly considered in the sampling design. The objective of this study was to modify the current sampling method to increase the efficiency for estimating value using model-dependent sampling theory. Eighteen model-dependent sampling strategies were developed from six subsampling methods using three estimators. The six subsampling methods were used to select trees from angle-count plots to estimate the relationship between cruiser-called and estimated tree value. Three subsampling methods used probability-based selection of trees and three methods used purposive-based selection of trees. Ratio, average ratio, and regression estimators were used with each method. The 18 strategies were tested using Monte Carlo simulation with 2000 samples at each of nine sample sizes in three test populations. The test populations were created by grouping angle-count plot data into mutually exclusive sets reflecting different stand characteristics. The sample sizes were n = 20,40, and 60 plots with m = n, 3n, and 5n subsampled trees. Individual tree value was estimated with regression equations that used variables closely related to the value of each species. The sampling strategies were evaluated for bias, sample variance, achieved subsample size, sampling cost, confidence interval coverage, and relative advantage against the current sampling method. The model-dependent subsampling methods using purposive selection of trees were more efficient than the current sampling method considering cost and variance. The purposive-based methods were biased up to about 5%; the probability-based methods were slightly less biased. The two most efficient methods were: i) purposive selection of trees with the highest estimated values in a plot; and ii) purposive selection of trees with estimated values within a given range to give a second-stage sample balanced on the auxiliary variable. The greatest efficiency was always achieved with one sample tree per plot. The current sampling method was unbiased for estimating value but required approximately twice as many plots to estimate value to the same level of precision as net volume.
Forestry, Faculty of
Graduate

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Li, Yaoxiang. „Modeling operational forestry problems in central Appalachian hardwood forests“. Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3814.

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Thesis (Ph. D.)--West Virginia University, 2005
Title from document title page. Document formatted into pages; contains ix, 144 p. : ill. (some col.) Includes abstract. Includes bibliographical references (p. 107-114).

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Liu, Shan. „Estimating the Potential Impact of Carbon Markets on North Carolina Forests“. NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-11052009-234247/.

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Several studies have examined the theoretical aspects of determining the optimal carbon rotation. This paper explores the tradeoff between timber and net carbon sequestration in managing representative forest management types in North Carolina. Under conservative assumptions regarding the social benefits of carbon storage, optimal rotation periods are extended depending on the forest type, carbon price, interest rate, and emission penalty under consideration. Analysis shows when carbon price is low the extension of the joint timber-carbon rotation are similar among DOE, CCX, and VCS protocols; when carbon price is high, the joint rotation extends longer under DOE protocol than the other two protocols, especially in the lowland hardwood forest type. Results suggest that such joint strategies could be financially attractive. Sensitivity analysis is used to examine the effects of changes in financial parameters on landowner returns and optimal management. Under most assumptions, our findings indicate that including carbon sequestration in forest management increases returns but leads to only marginal changes in rotation length.

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Wang, Fei. „Design and implementation of Web-based GIS for forest fragmentation analysis“. Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2473.

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Thesis (M.A.)--West Virginia University, 2002.
Title from document title page. Document formatted into pages; contains xi, 107 p. : ill. (some col.), maps (some col.). Includes abstract. Includes bibliographical references (p. 100-107).

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Bücher zum Thema "Forests and forestry – algeria"

D, Eppinger Steven, Hrsg. Product design and development. 2. Aufl. Boston: Irwin/McGraw-Hill, 2000.

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D, Eppinger Steven, Hrsg. Product design and development. 3. Aufl. Boston: McGraw-Hill/Irwin, 2004.

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D, Eppinger Steven, Hrsg. Product design and development. 5. Aufl. New York, NY: McGraw-Hill/Irwin, 2011.

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D, Eppinger Steven, Hrsg. Product design and development. 4. Aufl. Boston: McGraw-Hill Higher Education, 2008.

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Singh, Negi Sharad, Hrsg. Forests and forestry. 5. Aufl. New Delhi: National Book Trust, India, 1994.

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L, Rolfe G., und Anderson David A, Hrsg. Forests and forestry. 4. Aufl. Danville, Ill: Interstate Publishers, 1990.

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Holland, I. I. Forests and forestry. 5. Aufl. Danville, Ill: Interstate Publishers, 1997.

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Development, Great Britain Department for International. Forests matter: The DFID approach to forests. London: DFID, 1998.

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Great Britain. Department for International Development. Forests matter: The DFID approach to forests. London: DFID, 1997.

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I, Etverk, Karoles K und Estonia Riigi Metsaamet, Hrsg. Estonian forests and forestry. Tallin: Estonian Forest Dept., 1995.

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Buchteile zum Thema "Forests and forestry – algeria"

Mosley, Stephen. „Forests and forestry“. In The Environment in World History, 30–52. 2. Aufl. New York: Routledge, 2023. http://dx.doi.org/10.4324/9780429355851-3.

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Corlett, Richard T. „Classifying Tropical Forests“. In Tropical Forestry Handbook, 1–9. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41554-8_52-1.

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Corlett, Richard T. „Classifying Tropical Forests“. In Tropical Forestry Handbook, 479–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-642-54601-3_52.

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Akindele, Shadrach Olufemi, und Jonathan C. Onyekwelu. „Review Silviculture in Secondary Forests“. In Tropical Forestry, 351–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19986-8_23.

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Pettenella, Davide, und Mauro Masiero. „Financing Forests for Rural Development“. In Tropical Forestry, 265–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-41404-6_10.

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Arar, Abdelkrim, Slimane Tabet, Yacine Nouidjem, Rabah Bounar und Haroun Chenchouni. „Projected Small-Scale Range Reductions of Cedrus atlantica Forests Due to Climate Change at the Belezma National Park (Algeria)“. In Advances in Science, Technology & Innovation, 15–19. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01683-8_4.

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Vanclay, Jerome K. „Modelling Continuous Cover Forests“. In Continuous Cover Forestry, 229–41. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2202-6_7.

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Kandzior, Angelika. „Indigenous People and Forests“. In Tropical Forestry Handbook, 1–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-41554-8_269-1.

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Degen, Bernd, und Alexandre Magno Sebbenn. „Genetics and Tropical Forests“. In Tropical Forestry Handbook, 1–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41554-8_75-1.

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Kandzior, Angelika. „Indigenous People and Forests“. In Tropical Forestry Handbook, 3311–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-642-54601-3_269.

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Konferenzberichte zum Thema "Forests and forestry – algeria"

Yahi, Djamel, und Rached-Kanouni Malika. „THE CURRENT ECOLOGICAL STATUS OF ALEPPO PINE OF EL HAMIMET FOREST (ALGERIA)“. In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b2/v3/25.

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The forest of El Hamimet, Oum el Bouaghi is a forestry and ecotourism site. Managed by the Oum El Bouaghi Forestry Department, this forest is made up of several silvicultural species (conifers) spread over an area of 1460 ha. The objective of this study is to characterize the current ecological status of Aleppo pine in El Hamimet forest (Algeria). The inventory of softwoods allowing a complete knowledge of quantitative data on the basis of dendrometric parameters collected on 4 plots. The results indicate that the floral diversity is low, characterized by 3 species. The highest abundance is marked in plot 1 with 389 individual/ha, while plot P3 has the highest volume with about 211.58 m3/ha. The vertical structure shows that the 3-5m class is the most abundant. Indeed, this work will provide a solid reference for future follow-up studies for Aleppo Pine.

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Alia, Zerrouki, Redjaimia Lilia, Kara Karima und Rached-Kanouni Malika. „ASSESSMENT AND DIAGNOSIS OF POTENTIAL BIODIVERSITY IN THE CHETTABA FOREST (ALGERIA)“. In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b2/v3/02.

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In view of the challenges facing forest management today (global warming, increased demand for wood energy), taking account of biodiversity in forests is an immediate necessity. The aim of this work is to estimate the biodiversity of the Chettaba forest by studying these structural elements which provide indirect information on the state of biological diversity and aims to provide the first elements of an answer for the construction of a potential biodiversity index (PBI). This diagnostic tool is based on the scoring of a set of ten factors, seven of which are dependent on recent forest management and three independent of it. A score from 0 to 5 is assigned to each factor. The results show that the potential forest biodiversity is average in the Chettaba massif. The average or rather low values of the criteria in the investigated forest often depend on climate, soil and human actions.

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Boutheyna, Touafchia, Kadi Zahia, Redjaimia Lilia, Rached-Kanouni Malika und Zerrouki Alia. „CHARACTERISATION AND ASSESSMENT OF THE DECLINE OF THE OULED BECHIH FOREST (ALGERIA)“. In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b2/v3/03.

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The establishment of the state of the massif by a diagnosis on different forest plots is part of a project of monitoring and silvicultural management. The purpose of this study is to assess the health status of the Ouled Bechih forest. The methodology used was the visual assessment of the tree crown of the dominant species (i.e. Quercus suber and Quercus canariensis) according to the protocols DEPEFEU, DEPERIS and ICP Forests. These protocols were selected for adoption based on field observations and their applicability in record time. The results obtained indicate that the health status of the trees within the studied plots is declining. The DEPEFEU value index shows an average of 1.75 for Quercus suber and 2.6 for Quercus canariensis while the DEPERIS has an average level of 2.36 Q. suber in and 3.37 in Q. canariensis. ICP Forests has also contributed to providing clearer information on the consequences of this health situation by deducting an average visibility rate of 1.20 and 2.63; social status of 1.17 and 3.11 and competition of 1.11 and 2.49 for Q. suber and Q. canariensis respectively. In general, the health status of the tree crown is average and almost adapted to the environmental conditions. In contrast, the carrying capacity of biodiversity is low and needs to be improved.

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Alia, Zerrouki, Kara Karima, Redjaimia Lilia und Rached-Kanouni Malika. „TREE SPECIES DIVERSITY AND SPATIAL DISTRIBUTION OF HOLM OAK STANDS IN CHETTABA FOREST (ALGERIA)“. In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b2/v3/28.

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The forest of Chettaba is for ecotourism. Managed by the Forest Conservation of Constantine, this site is formed of several forestry species (hardwood and softwood) spread over an area of 3010 ha. The objective of this study is to estimate the viability of this site through the permanent monitoring of the current state of the forest including biodiversity and pressures. The collection of data related to it had recourse to a forest inventory and an inventory of pressures. The condition was assessed by analyzing these components. The various analyses conducted during this study revealed that the forest is subject to biotic and abiotic pressures and average viability. This is induced by a fairly good stand quality (PHF= 333), medium stability (S= 44.45), low mortality (MR = 4.16%) and good future potential (high regeneration rate (RR =231.25%). Grazing, fire and illegal logging are the most important pressures. Despite these pressures, the forest is classified as a viable ecosystem. However, these potentials are insufficient: it is necessary to reduce the pressures and reforest the degraded plots for better conservation of the ecosystem. To this end, the present study suggests management primarily through silvicultural interventions that promote the regeneration of the various species and to include a permanent ecological monitoring system.

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Djamel, Yahi, und Rached-Kanouni Malika. „CONTRIBUTION TO THE SILVICULTURAL STUDY OF CUPRESSUS SEMPERVIRENS“. In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b2/v3/05.

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In order to promote the timber industry of Cupressus sempervirens in Algeria and to be able to give a proposal of silvicultural conduct, we undertook research on the species and a silvicultural analysis of some stands of the forest of El Hamimet (East Algeria). The results of the bibliographic research reveal that the wood of Cupressus sempervirens is of superior quality, having all the criteria such as aesthetic aspect, hardness, structural stability and durability that a multitude of uses requires. The results of the silvicultural analysis of the studied stands show that the forest of El Hamimet is a very favourable station for Cupressus sempervirens.

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Alia, Zerrouki, Kara Karima, Redjaimia Lilia und Rached-Kanouni Malika. „FLORISTIC DIVERSITY AND STRUCTURAL CHARACTERIZATION OF THE FOREST OF CHETTABA (ALGERIA)“. In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b2/v3/12.

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"The structure of various stands, defined as the diversity of trees in the stands, can be an indication of overall biodiversity and habitat suitability, be useful in predicting stand growth and provide stand details for forest inventories. In an effort to find sustainable resource management strategies, a study was conducted on the structural and ecological characteristics of stands in Chettaba forest (Algeria). In this study, six diversity indices were used to characterize the horizontal and spatial distribution of individuals in multi-species stands, using four plots, located in the Chettaba forest (East-North Algeria). The results obtained allowed us to note that P2 and P3 present similar average densities (600 feet/ha), the plots P1 and P4 present low average densities (250 feet/ha and 350 feet/ha). The average DBH values vary from 25.65 cm for the P2 stand to 30.61 cm for the P1 stand. The average basal area varied between 33.73 m²/ha (P3) and 18.92 m²/ha (P1). The Shannon and Weaver index reached its maximum in plot 4 with 8 species. The study allowed us to evaluate the floristic diversity of the forest. Moreover, it indicated the need for its integral protection for its dynamics towards a dense forest vegetation."

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Amar, Haddad, Redjaimia L. ilia, Kadi Zahia, Rached-Kanouni Malika und Kara Karima. „ASSESSING THE HEALTH OF THE CHETTABA FOREST (ALGERIA)“. In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b2/v3/01.

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The establishment and interpretation of diameter and height structures are essential for forest management decisions. This study aims to describe the diameter structure and spatial distribution of Pinus halpensis populations in the Chettaba state forest (Constantine, Algeria). The knowledge of these parameters is an essential step for their sustainable management. The diameter at 1.30 m from the ground and the total height of P. halpensis individuals were measured on 6 plots along an altitudinal gradient. The height structure shows that trees in the height classes between 5 and 10m have a very high density, indicating low natural regeneration. The total structure indicates that smaller trees are more abundant than larger trees (17.5<d≤27.5cm). These results contribute to the improvement of knowledge on current condition indicators of natural Pinus halpensis stands that can be used as a basis in the management of Chettaba forest

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Touafchia, Boutheyna, Rached-Kanouni Malika und Kadi Zahia. „FLORISTIC DIVERSITY OF THE OULED BECHIH FOREST (ALGERIA)“. In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b2/v3/13.

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The objective of this study is to inventory the flora of the Ouled Bechih forest (Algeria) with a quantitative and qualitative analysis through significant parameters. This study allowed the identification of 27 species belonging to 26 genera and 17 families. The results show an important diversity of the regional flora which is essentially dominated by the Asteraceae, Fabaceae, Fagaceae and Rosaceae. Hemicryptophytes and geophytes dominate the biological spectrum of the flora of this forest, which is morphologically characterised by the dominance of perennial herbs. The analysis of the chorological types shows the predominance of the Mediterranean element.

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Chebouti, Nadjiba Meziou. „ANTIMICROBIAL ACTIVITY OF PHENOLIC EXTRACTS OF FLOWERS CALENDULA OFFICINALIS CULTIVATED IN ALGERIA“. In 14th SGEM GeoConference on WATER RESOURCES. FOREST, MARINE AND OCEAN ECOSYSTEMS. Stef92 Technology, 2014. http://dx.doi.org/10.5593/sgem2014/b32/s14.043.

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Boutheyna, Touafchia, Kadi Zahia, Redjaimia Lilia und Rached-Kanouni Malika. „STRUCTURAL AND FLORISTIC CHARACTERIZATION OF THE OULED BECHIH FOREST (ALGERIA)“. In GEOLINKS Conference Proceedings. Saima Consult Ltd, 2021. http://dx.doi.org/10.32008/geolinks2021/b2/v3/22.

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The objective of this study is the rational management of forest ecosystems for sustainable conservation of floristic biodiversity. Two types of analysis are carried out: structural analysis and analysis of the main species. A total of 22 families were identified, divided among 32 species. The dominant woody species are Quercus suber and Quercus canariensis. Fagaceae is the most represented family. The average values of species richness and Shannon diversity index are 4 ± 1.8 and 0.9 ± 0.30 species/plot respectively. The average density of woody species in the Oueld Bechih forest was 158 ± 28 tree/ha with an average basal area of 32.67 ± 0.74m²/ha. The height structure shows that trees in height classes is ≥ 6 has very high density, evidence of almost no natural regeneration. The total structure indicates that larger trees are more abundant. In effect, this work provides a database for the forest, but it represents only one facet to be considered in protecting and restoring it.

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Berichte der Organisationen zum Thema "Forests and forestry – algeria"

Dockry, Michael J., David N. Bengston und Lynne M. Westphal, Hrsg. Drivers of change in U.S. forests and forestry over the next 20 years. Madison, WI: U.S. Department of Agriculture, Forest Service, Northern Research Station, November 2020. http://dx.doi.org/10.2737/nrs-gtr-p-197.

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Gitonga, Daphine, Chemuku Wekesa, Godwin Kowero, Eva Kiseu, Doris Mutta, Raymond Omondi und Anders Roos. Kenyan Youth Perspectives on Forests : report from a youth-scientist dialogue on sustainable forestry. SLU Global, Swedish University of Agricultural Sciences, 2023. http://dx.doi.org/10.54612/a.3n821idolh.

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This report presents proceedings of “AfricanYouth4Forests” project workshop held in Voi, Taita Taveta county, Kenya from 7 to 9 November 2022. The workshop was jointly organised by African Forest Forum (AFF), Swedish University of Agricultural Sciences (SLU), and Kenya Forestry Research Institute (KEFRI). It brought together 19 youths from Taita Taveta and Nairobi counties between 18-25 years of age to engage with researchers and policymakers in conversations about young people's views, visions, goals, and ideas in shaping the future governance of Kenya’s and the continent's forests. The participants identified niches for youths' engagement in forests to improve forest cover, curb climate change effects and improve livelihoods. The youth participants envisioned 'a world where young people are more involved in sustainable development by participating in the green economy.' To achieve the youths’ vision, several actions were recommended; training the youth on sustainable forest management and green entrepreneurship, developing markets for green products, establishing innovative knowledge-sharing platforms, and actively involving the youths in national and international policy processes on forests and climate change. The outcome reflected a wide range of views and ideas among the youth, and that they have the capacity and readiness to tackle the forest-related challenges towards 2030 and beyond. It is recommended that the dialogue between African forestry researchers and the youth should continue.

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Marcos Morezuelas, Paloma. Gender, Forests and Climate Change. Inter-American Development Bank, März 2021. http://dx.doi.org/10.18235/0003072.

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As users of forest products and guardians of traditional knowledge, women have always been involved in forestry. Nevertheless, their access to forest resources and benefits and participation in forest management is limited compared to mens despite the fact that trees are more important to women, who depend on them for their families food security, income generation and cooking fuel. This guide aims to facilitate the incorporation of a gender lens in climate change mitigation and adaptation operations in forests, with special attention to those framed in REDD. This guide addresses four themes value chains, environmental payment schemes, firewood and biodiversity that relate directly to 1) how climate change impacts affect women in the forest and 2) how mitigation and adaptation measures affect womens access to resources and benefits distribution.

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Finley, James C., Susan L. Stout, Timothy G. Pierson und Barbara J. McGuinness. Managing timber to promote sustainable forests: a second-level course for the Sustainable Forestry Initiative of Pennsylvania. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station, 2007. http://dx.doi.org/10.2737/nrs-gtr-11.

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Brandt, Leslie, Lydia Scott, Abigail Lewis, Lindsay Darling und Robert Fahey. Lessons Learned from the Urban Forestry Climate Change Response Framework Project. United States Forest Service, Februar 2016. http://dx.doi.org/10.32747/2016.6964833.ch.

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Many urban foresters have recognized the need to incorporate climate change considerations into urban forest management, but often lack the specialized training or knowledge to explicitly address this in their planning and practices. This document describes a framework we developed and piloted in the Chicago region to assess the vulnerability of urban forests and incorporate that information into on-the-ground actions. We describe the three steps used to implement this project and the lessons learned from this process.

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Quak, Evert-jan. Missing the Forest for the Trees: Ekiti State’s Quest for Forestry Revenue and its Impact on Forest Management. Institute of Development Studies, Juli 2024. http://dx.doi.org/10.19088/ictd.2024.078.

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Effective forest management is required to reduce deforestation, protect local communities, tackle climate change, and restore biodiversity. Like other countries in sub-Saharan Africa (SSA), Nigerian federal and decentralised governments have to find a balance between managing their forests sustainably, and other demands for the trees and land. Local actors use the forest for economic activities, such as harvesting trees for charcoal or timber, and others want to expand agricultural land. No single policy solution can guarantee to sustainably manage forests and halt deforestation. Land use regulations, stronger control of forestry industry practices, more public investment in forest management, and better tax and subsidy policies, must all play a role. This paper assesses the current forestry tax regime in Ekiti State, one of eight Nigerian states where forests represent more than 50 per cent of land area, and where forest revenue has been historically relevant. Based on 16 interviews with government state officials, forest officers, and actors from the industry, and data from the Ekiti Forestry Commission, our analysis suggests that ongoing depletion of forest resources is partially connected to an excessive focus on their capacity to generate revenue. The conceptualisation of the Forestry Commission as a revenue-raising rather than management agency, a continuous drive to extract revenue from the sector through outdated tax rates, and a view of industry potential disconnected from the existing stock, all perversely led to a lower contribution from forestry to the state budget.

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Occhiali, Giovanni, und Michael Falade. Missing the Forest for the Trees: Ekiti State’s Quest for Forestry Revenue and its Impact on Forest Management. Institute of Development Studies, August 2023. http://dx.doi.org/10.19088/ictd.2023.039.

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Forests are important socio-economic assets in many low-income countries. However, they are often over-exploited as governments do not sufficiently valorise them, including by taxing them inefficiently. This is the case across Nigeria, where forest management and taxation has been effectively decentralised from the federal government to individual states. In this paper we assess the current forestry tax regime in Ekiti State, one of the eight Nigerian states where forests represent more than 50 per cent of land area, and where forest revenue has been historically relevant. Based on 16 interviews with government state officials, forest officers and actors from the industry, as well as data from the Forestry Commission, our analysis suggests that the ongoing depletion of forest resources in the state seems to be partially connected to an excessive focus on their capacity to generate revenue. The conceptualisation of the Ekiti State Forestry Commission as a revenue-raising agency rather than a management one, a continuous drive to extract revenue from the sector through outdated tax rates, and a view of the industry potential disconnected from the existing stock, all perversely led to a lower contribution from forestry to the state budget. While there is potential to reform both the structure of forestry taxes and their method of administration, evidence from our interviews suggests that priority should be given to enforcing a ban on forest exploitation for a period that is long enough to allow for its regrowth, at least in government reserves. This will require substantial sensitisation and engagement with actors in the sector, as well as increasing the monitoring capacity of the Forestry Commission. The Forestry Commission does not currently have enough staff to guarantee the enforcement of existing legislation, let alone a ban on all forest activities.

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Elias, Emile, Caiti Steele, Kris Havstad, Kerri Steenwerth, Jeanne Chambers, Helena Deswood, Amber Kerr et al. Southwest Regional Climate Hub and California Subsidiary Hub Assessment of Climate Change Vulnerability and Adaptation and Mitigation Strategies. United States. Department of Agriculture, August 2015. http://dx.doi.org/10.32747/2015.6879806.ch.

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In 2015, the Southwest and California Climate Hubs published a report describing the potential vulnerability of crops, forests and animal agriculture to climate-driven environmental changes. The exposure of specific sectors of the agricultural and forestry industries varies across the region because the Southwest is climatically and topographically diverse. There is also variability in the sensitivity of different systems to the effects of climate change. Most significantly, there is potential within agricultural and forestry systems to adjust to climate-related effects either through inherent resilience or through conservative management practices. The purpose of this report is to describe regional vulnerabilities to climate change and adaptive actions that can be employed to maintain the productivity of working lands in the coming decades.

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Elias, Emile, Caiti Steele, Kris Havstad, Kerri Steenwerth, Jeanne Chambers, Helena Deswood, Amber Kerr et al. Assessment of Climate Change Vulnerability and Adaptation and Mitigation Strategies in the Southwest and California. USDA Southwest Climate Hub, Oktober 2017. http://dx.doi.org/10.32747/2017.6965582.ch.

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This report describes the potential vulnerability of specialty crops, field crops, forests, and animal agriculture to climate-driven environmental changes. Here, vulnerability is defined as a function of exposure to climate change effects, sensitivity to these effects, and adaptive capacity. The exposure of specific sectors of the agricultural and forestry industries varies across the region because the Southwest is climatically and topographically diverse. There is also variability in the sensitivity of different systems to the effects of climate change. Most significantly, there is potential within agricultural and forestry systems to adjust to climate-related effects either through inherent resilience or through conservative management practices. The purpose of this analysis is to describe regional vulnerabilities to climate change and adaptive actions that can be employed to maintain productivity of working lands in the coming decades.

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Timko, Joleen A., Stefania Pizzirani, Robert A. Kozak und Gary Bull. Exploring First Nation-held Forest Tenures and Community Forest Enterprises in British Columbia. Rights and Resources initiative, Dezember 2017. http://dx.doi.org/10.53892/igap7817.

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The purpose of this report is to situate existing knowledge on First Nation-held forestry tenures and community forest enterprises (CFEs) in British Columbia, Canada within a broader discussion about Indigenous and non-Indigenous community forests in Canada. This report provides 1) A brief characterization of Indigenous forestry partnerships across Canada; 2) A description of the two most common First Nation-held forest tenures within British Columbia: the First Nations Woodland License and the community forest agreement; 3) An assessment of challenges and constraints facing First Nation-led CFEs in British Columbia; 4) An assessment of key enabling conditions in First Nation-led CFEs in British Columbia; and 5) Recommendations to enable Indigenous communities, policymakers, the private sector, and supporting institutions to strengthen the business proposition of Indigenous-led CFEs in British Columbia and elsewhere in Canada.

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