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ArticlePattern of urban forest changes in a volcano neo-tropical city
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Urban forests are a key component of nature-based adaptation strategies; therefore, their monitoring and management is fundamental to urban management in the 21st century. This research identified and estimated land cover changes in an urban space located in the neo-tropical Andean valleys. To achieve this objective, we set out to quantify over a five-year period (2013-2017) the land cover changes with emphasis on impervious cover, forest fragments, urban trees, and urban green areas. Thus, we identified the spatial variations of urban vegetation over the five-year period using SPOT 6 and 7 images, applying an object-based classification and a transition matrix. We found an increase in the impervious category and the loss of urban vegetation, represented by the sum of the categories: forest, green areas and shrub-shrub. In parallel, we observed an increase in forest and urban woodland that compensated for the losses in the categories of shrubs and green areas. Quantifying the spatio-temporal variations of urban forests more accurately and at an appropriate scale generates timely information for the design policies aimed at achieving environmental justice in the city; and also will determine the transition to sustainability cities in the 21st century. Keywords: urban forest, object-based classification, SPOT, land cover changes ID: 3488631 -
ArticleFarmers’ perceptions of herbicide usage in forest landscape restoration programs in Ghana
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Although herbicides have extensively been used in forest landscape restoration its effects and opportunity costs have rarely been studied in Ghana. This study assessed the perceptions on the effects of herbicide usage among farmers enrolled in a taungya i.e. farm forestry programs in the dry semi-deciduous ecological zone of Ghana. Data was collected from 300 taungya farmers and 50 herbicide traders and analyzed descriptively and quantitatively. Results indicate that 100% of farmers perceived herbicides as having deleterious effects on flora (seedlings, under-storey wild foods, medicines) and fauna (soil micro-organisms, fish in rivers) as well as water quality, soil structure and human health. Nevertheless, 93% of them use herbicides to reduce labour costs and to establish larger acreages. Based on their functional properties, 85% of herbicides traded are non- selective for bush clearing and 15% are selective for weeding. Farmers use them indiscriminately due to poor knowledge on recommended practices and intensity of invasiveness of weed species. Education, residential status and age of respondents significantly predicted usage. The study recommends a review of Ghana’s pesticide deployment strategies and herbicides guide book for use in farm forestry. Capacity of frontline forestry professionals, traders and farmer-based organizations must be enhanced to effectively advice and monitor safe application. Plant based herbicides must be promoted for safety and enhancement of biodiversity. Keywords: Pesticides, herbicides, herbicide pollution in forest-ecosystems, herbicides in forest vegetation management, taungya system ID: 3486132 -
ArticleKnowledge and perception of senior civil servants on the environmental and social service functions of urban forestry
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.This study was conducted to assess the Knowledge and Perception of Senior Civil Servants on Social and Environmental Services of Trees in Federal and Oyo State Secretariats. Two hundred copies of questionnaire were administered. One hundred each for Federal Secretariat staff and the State Secretariat staff. In all, 187 copies were retrieved. Purposive sampling technique was adopted for the study and data collected were analyzed with descriptive statistics and Chi-square (X2). The results showed that the senior civil servants are well educated with over 40% having B.Sc at the federal and state secretariats in general, ND has 20.9%, HND (19.3%), BSc (43.9%) and MSc (16%). and the field of study of the majority is Social sciences followed by sciences as follows 51.9%, 25.7%, 17.6% and 4.8% of the respondents respectively studied Social science, Science, Agric/Forestry and Technology. Above 70% of the respondents are aware of the presence and benefits of tree around their office premises and street they live in. of all the benefits of trees in their surrounding, Cooling the environment has the highest percentage of about 40%. On the danger posed by urban trees, Trees falling on roads because of windstorm has the highest percentage of 72.8%. The Awareness on the benefits of trees on Social and Environmental services is very high (above 70%) among the respondents with all the statements such as Trees can reduce energy needs for refrigeration and air conditioning through provision of shade and reduced air temperatures thereby reducing the emission of pollutant chlorofluorocarbons (CFC). Based on the knowledge of urban forestry majority of the respondents are willing to conserve urban trees. Good policy that can bring about development of forestry sector in Oyo state is achievable because it was observed that the senior civil servants at both federal and state secretariats had enough knowledge and perception about the importance of urban trees. Keywords: Urban trees, awareness, civil servants, environment and services ID: 3475762
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