Alias Mohamad Azani

Universiti Putra Malaysia | UPM · Department of Forestry Science and Biodiversity

Spatiotemporal assessment of land cover (LC) trends and vegetation degradation (VD) using remote sensing (RS) and indicators such as anthropogenic activities and the socio-demographic information is essential for an effective and efficient planning. This paper evaluated land cover change and VD in Kebbi State, Nigeria, using Landsat data from 1986...

The Cameron Highlands is a popular tourist destination in Malaysia, filledwith vibrant forest covers and an area suitable for highland agriculture. Due to rapid population growth, urbanisation, as well as land use/ land cover (LULC) issues, it becomes a national concern. Cameron Highlands Malaysia has witnessed multiple land encroachment activities...

The Cameron Highlands has experienced multiple land encroachment activities and repeated deforestation, leading to extensive land-use and land-cover change (LULCC) during the past six decades. This study aims to determine the LULCC against topography in Cameron Highlands between 2009 and 2019 by using geospatial techniques to analyze Landsat 7 (ETM...

Desertification has been a global concern long ago. However, it has never been as severe as it is in the present day. According to the United Nations Convention to Combat Desertification (UNCCD), almost one-third of the world’s agricultural land is facing one form of degradation or another. Assessment of desertification using GIS nowadays presents...

We evaluate the efficacy of artificial shade shelters in promoting seedling growth and ecophysiological traits in degraded tropical forest land. Seedlings of Dyera costulata were planted in an open control plot and two open-top shade shelters (2 and 3 m in height). Leaf traits, including nitrogen content, the ratio of variable to maximum fluorescen...

This study was conducted on the south slope of the Al-Jabal Al-Akhdar (the Green Mountain) rangelands, northeast Libya to investigate changes in perennial plant species richness, landscape function and soil surface condition in order to determine whether exclosures are effected strategy for the improvement and rehabilitation of rangeland ecosystem...

A study was conducted to determine the tree species composition and species diversity at Compartment 4 of Sungai Udang Forest Reserve, Malacca. A total of 1668 individual trees with diameter at breast height (DBH) of 5 cm and above were found in the 25 plots in Sungai Udang Forest Reserve, Malacca, Peninsular Malaysia of which overall floristic com...

The genus Aquilaria (Thymelaeaceae) is widely used for the production of agarwood, and includes several valuable plantation species in Southeast Asia. To understand appropriate planting conditions, it is necessary to characterize species-specific ecological traits such as photosynthesis and drought tolerance among Aquilaria species. To this end, we...

Geospatial distribution of soil physical properties using Geographic Information System (GIS) is essential and efficient to site-specific farming and environmental management processes. This study attempts to evaluate the spatial distribution of soil physical properties and their impact on vegetation status in Kebbi State, Nigeria using the geospat...

Spectral Vegetation Indices (SVIs) have been used to examine variations in vegetation formation and phenology. Lately, researchers and agricultural practitioners have utilized SVIs to examine various soil properties for instance moisture and nutrients. From our review of the literature, there were few comprehensive studies conducted to know whether...

Neobalanocarpus heimii, a well-known heavy hardwood timber species, is categorised as Vulnerable in Peninsular Malaysia due to the extreme demand for its timber and poor regeneration of the species. Moreover, limited research on shading and its effect on biomass allocation, biomass ratio and leaf morphology pose great challenge for N. heimii restor...

Soil properties of tropical rain forest in Southeast Asia have been characterized by several researchers. However, empirical data on soil characteristics under rehabilitation program are still limited or even lacking. A study was conducted to characterize the soil physical properties under different densities of Shorea peltata species. The objectiv...

The degradation rate of Mediterranean steppes, especially in North Africa is 1% per year, and this considered as high a rate of degradation. This study conducted in 2014 in the south slope of the Al-Jabal Al-Akhdar, northeast Libya to quantify the vegetation recovery rate and assess selected Vegetation Indices (VIs) for mapping rangelands degradati...

Relative light intensity (RLI) is one of the most significant factors that affect plant growth by controlling physiological traits of plants in terms of photosynthesis, respiration, stomatal conductance, and chlorophyll synthesis, among others. An experiment was conducted in the shade house and open area to determine the effect of three light inten...

A phytosociological study on the flora and vegetation community of Palaquium gutta (Hook.f.) Baill. was carried out in Compartment 13 of Ayer Hitam Forest Reserve, Selangor. The main objectives of this study were to identify, characterize and classify the P. gutta community which is naturally distributed in Ayer Hitam Forest Reserve. A total of 10...

WAN RAZALI WM, ABDUL RAZAK T, MOHAMAD AZANI A & KAMZIAH AK. 2015. Mixed-effects models for predicting early height growth of forest trees planted in Sarawak, Malaysia. Total height growth models as a function of basal tree diameter at 10 cm above ground (D 10) for five indigenous species in Sarawak, namely, Calophyllum sclerophyllum, Dryobalanops b...

Monitoring and evaluating the distribution and dynamics of vegetation cover in rangelands is very important to study the impact of human activities and climate change on rangeland ecosystems. The scientist's predictions of positive and negative changes in rangeland conditions were difficult in many cases due to weak understanding of the interaction...

Sprouting ability is highly variable among different tree species. In many cases, there are trade-offs in carbon allocations between growth and storage in seedlings. However, this trade-off is likely to change with growth stages from seedling to mature plant because carbon investments in reproductive activities and/or risk of disturbance also chang...

We assessed the variability of chloroplast DNA sequences in populations of the dipterocarp forest tree, Shorea curtisii. This species is widely distributed in hill and coastal hill dipterocarp forests of the Malay Peninsula, whereas isolated populations are found in the coastal hills of north Borneo. Two chloroplast DNA regions (1555 bp of trnH-psb...

Yemen is one of the world's least developed countries and experiences problems of scarcity of natural agricultural resources as well as soil erosion and degradation. Agroforestry systems (AFS) are being promoted as a more appropriate land use system than monocropping systems (MCS) worldwide. Unfortunately, long term studies on the agroforestry and...

Silviculture Agroforestry Regime (SAR) is a compatible management model between the local community agroforestry with the intensive buffer zone and Gunung Merapi National Park (GMNP) through forest rehabilitation and renewal zonation system. The aims of this study: to assess the prospects of SAR among the stakeholders, i.e. the local community, the...

Growth and photosynthetic response of four indigenous tree seedlings, i.e. Dyera costulata, Dipterocarpus baudii, Neobalanocarpus heimii and Gonystylus affinis were studied under different light conditions in a degraded secondary forest. Maximum photosynthesis (A max) was measured at 2 and 12 months after planting. The ratio of variable to maximum...

Silviculture agroforestry regime (SAR), which is a compatible management with forest rehabilitation and also renewal zoning system of the national park, was started to increase the agroforestry productivity surrounding Gunung Merapi National Park (GMNP). In addition, SAR also supported the basic information succession of Mount Merapi eruption in 20...

Following the 2006 eruption in Mount Merapi, Indonesia, it is important to assess the dynamic growth and potential standing stock of Acacia decurrens as a woodfuel for the local community surrounding in the southern of Gunung Merapi National Park. Five plots (P1, P2, P3, P4 and P5), were established. This study carried out in May 2008. During the p...

Leaf ecophysiological responses and height growth were studied in four indigenous tree seedlings planted under different size gaps in degraded tropical secondary forest. Dyera costulata, Diptero- carpus baudii, Neobalanocarpus heimii, and Pouteria sp. were selected for study species. The leaf photosynthetic rate at light saturation (Amax), light co...

Leaf hairs may assist in maintaining high leaf water use efficiency in tropical secondary forest tree species. We compared leaf temperature, transpiration, photosynthesis and water use efficiency between hairy and depilated leaves in Mallotus macrostachyus (Euphorbiaceae), to determine the role of leaf hair in leaf water use efficiency (WUE) in tro...

Studies on the growth performance on five selected indigenous trees species of Azadirachta excelsa, Cinnamomum iners, Hopea pubescens, Intsia palembanica and Shorea leprosula under open area planting technique on degraded forest area were carried out in Pasoh Forest Reserve Area, Negeri Sembilan. Evaluation on the growth and survival of these speci...

To investigate the adaptive capacity to a strong light environment when planted on degraded land, we examined photosynthetic properties in relation to photoinhibition for the sun-leaves of six tropical fruit tree species native to Malaysia before and after transplanting. The six species were: Bouea macrophylla (Bm), Callerya atropurpurea (Ca), Cana...

Ayer Hitam Forest Reserve (AHFR) has been classified as an Education and Research Forest (Forestry Act, 1984). Located 25 km from Universiti Putra Malaysia (UPM), it provides an important site for teaching, research and extension use by students and academic members of the University. The management of AHFR had been entrusted to the Faculty of Fore...

The effect of an artificial shading shelter

Land degradation is one of many problems faced by foresters, agriculturists and farmers. A degraded land restricts plant growth and requires a long time to return to its original conditions. The objectives of this study are to establish a green corridor on deeply degraded site and to screen animal-loving species in terms of survival and growth perf...

This study measured responses of domestic sewage sludge on tree growth. The study was conducted in the greenhouse at the Faculty of Forestry, Universiti Putra Malaysia using two timber species: Dyera costulata and Cinnamomum iners. A total of 10 levels of sewage sludge treatment were applied to each species replicated four times. A total of 80 seed...

In order to rehabilitate degraded forest ecosystem properly, it is important to develop the plantation technique from physiological aspects. Nine tree species whose fruits were edible for animals and birds were selected from UPM nursery and planted on severely degraded land at Ayer Hitam Forest Reserve in Malaysia on 19 th October, 2003. To estimat...

To investigate the adaptive capacity to strong light, we examined photosynthetic properties in relation to photoinhibition for sun-leaves of 6 tropical fruit tree species native to Malaysia. The 6 species are: Bouea macrophylla (Bm), Callerya atropurpurea (Ca), Canarium sp. (Csp), Cynometra cauliflora (Cc), Morinda citrifolia (Mc) and Syzysuim oley...

A rehabilitation study of tropical rainforests in Sarawak was conducted in two phases, namely a phytosociological study and stand-establishment studies, the phases run consecutively. Two vegetation communities were recognized: a Cyrtostachys lakka - Whiteodendron moultianum community and a Hopea kerangasensis - Allantospermum borneellse community....

Contribution from the Department of Vegetation Science, Institute of Environmental Science & Technology, Yokohama Natlonal University, No.218 The tropical rainforests in southeast Asia are classified into several types by Peter Ashton (1991). Their species composition is not yet clarified because of the high species richness. In this report several...

Contributed paper for the Department of Vegetation Science, Institute of Environmental Science and Technology, Yokohama Natlonal University, No.219. A study was conducted on the application of the Miyawaki forest rehabilitation technique toward creating a stand of native Malaysian primary forest trees (Dipterocarps and Non Dipterocarps) in degraded...