Browsing by Author "Ayu, Febri"
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Item KEANEKARAGAMAN DAN BIOMASSA RAYAP TANAH DI HUTAN ALAM DAN HUTAN TANAMAN INDUSTRI (HTI) PADA LAHAN GAMBUT DI KAWASAN BUKIT BATU, RIAU(2014-03-28) Ayu, Febri; Muhammad, Ahmad; Salbiah, DesitaThe conversion of peat swamp forest into industrial pulpwood (Acacia crassicarpa) plantation forest (“HTI”) has been suspected to cause substantial change in biodiversity, such as might be reflected in termite assemblages. This study was carried out to investigate how such conversion affects subterranean termites diversity and biomass. The study area was conducted at Bukit Batu District, Riau Province. Termite sampling was done in September and October 2011 at four natural forest sites in Bukit Batu Wildlife Reserve and four HTI sites situated near the former. Termites were systematically sampled with the help of a transect of 100 m drawn on each site. We used 10 square subplots (1 m x 1 m) situated along the transect with a regular interval of 10 m, and termites were extracted down to 10 cm deep beneath the peat surface. Nine species were found, consisting of eight genera, four subfamilies and two families. Termite species found only under natural forest were Microcerotermes dubius, Bulbitermes flavicans, Nasutitermes proatripennis and Ceylonitermes indicola. Species encountered only under HTI was coptotermes curvignathus. Four species occurring in both land use types were Capritermes semarangi, Capritermes mohri, Schedorhinotermes malaccensis and Parrhinotermes aequalis (Sørensen Similarity Index = 61.54%). Termite biomass was relatively small, with only 0.53 ± 0.41 gr/m2 and 0.29 ± 0.19 gr/m2 under natural forest and HTI, respectively, and there was no significant difference between themItem KEANEKARAGAMAN DAN BIOMASSA RAYAP TANAH DI HUTAN ALAM DAN HUTAN TANAMAN INDUSTRI (HTI) PADA LAHAN GAMBUT DI KAWASAN BUKIT BATU, RIAU(2013-03-04) Ayu, Febri; Muhammad, Ahmad; Salbiah, DesitaThe conversion of peat swamp forest into industrial pulpwood (Acacia crassicarpa) plantation forest (“HTI”) has been suspected to cause substantial change in biodiversity, such as might be reflected in termite assemblages. This study was carried out to investigate how such conversion affects subterranean termites diversity and biomass. The study area was conducted at Bukit Batu District, Riau Province. Termite sampling was done in September and October 2011 at four natural forest sites in Bukit Batu Wildlife Reserve and four HTI sites situated near the former. Termites were systematically sampled with the help of a transect of 100 m drawn on each site. We used 10 square subplots (1 m x 1 m) situated along the transect with a regular interval of 10 m, and termites were extracted down to 10 cm deep beneath the peat surface. Nine species were found, consisting of eight genera, four subfamilies and two families. Termite species found only under natural forest were Microcerotermes dubius, Bulbitermes flavicans, Nasutitermes proatripennis and Ceylonitermes indicola. Species encountered only under HTI was Coptotermes curvignathus. Four species occurring in both land use types were Capritermes semarangi, Capritermes mohri, Schedorhinotermes malaccensis and Parrhinotermes aequalis (Sørensen Similarity Index = 61.54%). Termite biomass was relatively small, with only 0.53 ± 0.41 gr/m2 and 0.29 ± 0.19 gr/m2 under natural forest and HTI, respectively, and there was no significant difference between themItem SUBTERRANEAN TERMITE FAUNA ON A PEATLAND: A PRELIMINARY ASSESSMENT OF THE SPECIES DIVERSITY AND BIOMASS UNDER DIFFERENT LAND USE TYPES(2014-05-21) Muhammad, Ahmad; Ayu, Febri; Saputra, Andi; Yus, Yusnarti; Purnasari, Treshandila; Salbiah, DesitaOwing to their wet nature, peatlands in their original conditions may not be favorable habitats for most ground-dwelling organisms. Apart from being acidic, peat is water saturated most of the times, making it unlikely habitatble for such organisms. After the construction of drainage system, however, substantial amount of water can be drawn out from the peat, resulting the drop of water table. We hypothesized that the alteration of this fundamental feature of peatlands might promote the proliferation ground-dwelling organisms in peatland habitats and/or colonization by non-native ones. We tested our hypothesis by surveying termite species richness and biomass under different land use systems that reflected a gradient of water table alteration (from shallower than 20 cm to deeper than 100 cm below the surface). The study has been carried out under peat swamp forest, rubber jungle, rubber plantation, oil palm plantation, homegarden, and acacia plantation forest in Bukit Batu area, Riau, Sumatra. We encountered a total 18 spp of subterranean termites with the average of only 6.2 spp found under each land use type. The average subterranean termite biomass was 0.29 gr/m2. Our data did not support our hypothesis in a way that subterranean termites were even most diverse (9 spp) and demonstrated largest biomass (0.53 gr/m2) under peat swamp forest, where the water table was never deeper than 20 cm and the peat was almost always watersaturated. However, the striking differences in species composition between peat swamp forest assemblage and those under other land use types suggest that the conversion of peatland might have significantly reduced the number of species native to this ecosystem, while inviting nonnative ones