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Bintulu, Malaysia

Cummings N.J.,Lincoln University at Christchurch | Ambrose A.,Sarawak Forestry Corporation | Braithwaite M.,Lincoln University at Christchurch | Bissett J.,Agriculture and Agri Food Canada | And 6 more authors.
Mycological Progress | Year: 2016

Trichoderma species form endophytic associations with plant roots and may provide a range of benefits to their hosts. However, few studies have systematically examined the diversity of Trichoderma species associated with plant roots in tropical regions. During the evaluation of Trichoderma isolates for use as biocontrol agents, root samples were collected from more than 58 genera in 35 plant families from a range of habitats in Malaysian Borneo. Trichoderma species were isolated from surface-sterilised roots and identified following analysis of partial translation elongation factor-1α (tef1) sequences. Species present included Trichoderma afroharzianum, Trichoderma asperelloides, Trichoderma asperellum, Trichoderma guizhouense, Trichoderma reesei, Trichoderma strigosum and Trichoderma virens. Trichoderma asperellum/T. asperelloides, Trichoderma harzianum s.l. and T. virens were the most frequently isolated taxa. tef1 sequence data supported the recognition of undescribed species related to the T. harzianum complex. The results suggest that tropical plants may be a useful source of novel root-associated Trichoderma for biotechnological applications. © 2016, German Mycological Society and Springer-Verlag Berlin Heidelberg. Source


Styring A.R.,Evergreen State College | Ragai R.,Grand Perfect Sdn Bhd | Unggang J.,Grand Perfect Sdn Bhd | Stuebing R.,Grand Perfect Sdn Bhd | And 2 more authors.
Forest Ecology and Management | Year: 2011

Plantations of exotic trees for industrial and agricultural purposes are burgeoning in the tropics, and some of them offer the opportunity to study community ecology of animals in a simplified forest setting. We examined bird community assembly in different aged groves of the industrial tree mangium (Acacia mangium) at two plantations in Malaysian Borneo: Sabah Softwoods near Tawau, Sabah, and the Planted Forest Project, near Bintulu, Sarawak. Bird communities were compared among three age-groups of mangium (2-, 5-, and 7-years old) and logged native forest. Mangium rapidly developed into a secondary forest consisting of a wide diversity of understory trees and shrubs. The bird community correspondingly increased in species richness and diversity, and we were able to relate these increases specifically to canopy height, secondary canopy development, and shrub cover. Species of common, small bodied frugivores, nectarivores, and insectivores were diverse in older plantation groves, as were common mid-sized insectivores. However, large, specialized, and normally uncommon taxa (e.g., galliforms, pigeons, hornbills, barbets, midsized woodpeckers, muscicapine flycatchers, and wren babblers) were rare or nonexistent in the plantations. Because we lacked species-specific data on foraging, nesting, and other behaviors of most groups of birds, it was difficult to explain the precise causes of seral diversification in any group except woodpeckers, which have been well studied in Southeast Asia. Thus, in future, particular emphasis needs to be placed on obtaining such data. Industrial plantations, by virtue of their simple structure, variably aged groves, and bird community richness, are good places to gather such data. © 2010 Elsevier B.V. Source


Shadbolt A.B.,University of Canterbury | Ragai R.,Grand Perfect Sdn Bhd
Biodiversity and Conservation | Year: 2010

Brown spiny rats (Maxomys rajah) were translocated from continuous secondary forest to small isolated patches of remnant native forest embedded within Acacia mangium plantation in the Planted Forest Zone of Sarawak, East Malaysia, and fitted with tracking spools to monitor behaviours in novel environments and to record responses to a range of habitat edge features. Forest roads, large clearings and acacia plantation compartments were found to pose barriers to dispersal of brown spiny rats over short temporal scales, whereas old regenerating haul trails were readily crossed on 50% of the encounters. Downed woody debris accounted for a greater proportion of the travel route compared with brown spiny rats tracked in secondary and primary forest in Sabah, which may represent heightened predator avoidance in new environments. Provision of downed woody debris within plantation compartments may improve the dispersal ability of brown spiny rats in this modified landscape, and thus promote metapopulation dynamics and colonisation of vacant habitat patches. © Springer Science+Business Media B.V. 2009. Source


Lee C.S.,Nanyang Technological University | Diong C.H.,Nanyang Technological University | Goh B.S.,Nanjing University | Goh B.S.,University of Kuala Lumpur | And 2 more authors.
Journal of Biological Dynamics | Year: 2011

In this paper, we use the Verhulst logistic equation to model the population dynamics of a bearded pig population in a logged-over planted forest in Sarawak, Borneo Island. Using available information on the population, we generate a set of potential growth data for a pair of adult bearded pigs. Based on the data, we obtain two parameters of the logistic model, namely, the intrinsic growth rate r of the managed population and the carrying capacity K of the environment. Two harvesting strategies, constant effort versus constant quota strategy for maximum sustainable yield of the natural resource, are then considered; for system stability, the former harvesting strategy is preferred over the latter. However, as it may take some time for the benefits of implementation of an alternative harvesting policy to be realized, the cooperation of all stakeholders is paramount and necessary for the management strategy to succeed. © 2011 Taylor & Francis. Source

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