Benthic invertebrate fauna of an aseasonal tropical mountain stream on Bougainville Island, Papua New Guinea

1995 ◽  
Vol 46 (2) ◽  
pp. 507 ◽  
Author(s):  
CM Yule
Keyword(s):  
Papua New Guinea ◽  
New Guinea ◽  
Benthic Invertebrate ◽  
Mountain Streams ◽  
Mountain Stream ◽  
High Mountain ◽  
Invertebrate Fauna ◽  
Closely Related Species ◽  
Lowland Rivers ◽  
Tropical Mountain

The benthic invertebrate fauna of Konaiano Creek, a small aseasonal mountain rainforest stream on Bougainville Island, Papua New Guinea, was studied over a period of 22 months. Konaiano Creek supported a diverse, mostly undescribed, fauna dominated by two closely related species of Simuliidae (55% of the total specimens collected) and two species of Hydropsychidae. Over 182 taxa were recorded, more than half of which were Diptera. Species richness in Konaiano Creek was quite high in comparison with that of similar streams in both tropical and temperate regions. There were 31 species of Trichoptera, but there were no Plecoptera, Mollusca, Psephenidae, or Megaloptera. Although many groups of marine origin such as Gastropoda, Atyidae, Palaemonidae and fish inhabited nearby coastal rivers, these animals were apparently unable to colonize high mountain streams because of the torrential, barren nature of the mid-mountain streams that sharply divide the headwater streams from the lowland rivers on Bougainville Island.

Trophic relationships and food webs of the benthic invertebrate fauna of two aseasonal tropical streams on Bougainville Island, Papua New Guinea

1996 ◽  
Vol 12 (4) ◽  
pp. 517-534 ◽  
Author(s):  
Catherine Mary Yule
Keyword(s):  
Papua New Guinea ◽  
Trophic Ecology ◽  
New Guinea ◽  
Benthic Invertebrate ◽  
Trophic Levels ◽  
Trophic Relationships ◽  
Invertebrate Fauna ◽  
Fine Particulate ◽  
Filter Feeders ◽  
Allochthonous Detritus

ABSTRACTThe trophic ecology of Konaino Creek, a small mountain headwater stream draining rainforest in the aseasonal tropics on Bougainville Island, Papua New Guinea, was examined and a food web was constructed. The major source of energy in Konaiano Creek was allochthonous detritus, most of which had been terrestrially degraded to fine particulate organic matter rather than entering the stream as leaf litter. This fine detritus was collected by the filter-feeders (mostly Simuliidae and also Hydropsychidae) which formed the dominant functional feeding group (64.4% of the fauna). Thus filterers processed most of the allochthonous detritus and made the energy available to other trophic levels, rather than shredders (1.7% of the fauna) which perform this role in temperate headwater streams. Collector-gatherers made up 22.7% of the fauna, carnivorses, mostly Odonata, Decapoda (crabs) and Hydrobiosidae, comprised 2.8% of the fauna and grazer-scrapers made up 7.4%. The latter were inhibited by low instream production owing to heavy shading and the instability and abrasion of the substrate due to frequent spates. In comparison, the trophic ecology of the nearby, coastal, Bovo River (with a catchment mainly in rainforest but mostly cleared with introduced species at the study site) was quite different and it was dominated by collector-gatherers (74%) and grazer-scrapers (15%).

Revision of Coronostrongylus (Nematoda : Strongyloidea) parasitic in the stomachs of macropodid marsupials

2002 ◽  
Vol 16 (6) ◽  
pp. 893 ◽  
Author(s):  
I. Beveridge
Keyword(s):  
Papua New Guinea ◽  
Host Species ◽  
Related Species ◽  
New Guinea ◽  
Nematode Species ◽  
Closely Related Species ◽  
Nematode Genus ◽  
Eastern Australia ◽  
Wide Range ◽  
Species Occurrences

The monotypic nematode genus Coronostrongylus Johnston & Mawson, 1939 from the stomachs of macropodid marsupials was reviewed and was found to consist of a least seven closely related species. Coronostrongylus coronatus Johnston & Mawson, 1939 is found most commonly in Macropus rufogriseus, but occurs occasionally in M. dorsalis, M. parryi and Petrogale inornata. Coronostrongylus johnsoni, sp. nov. is most commonly found in M. dorsalis, but occurs also in M. rufogriseus, M. parma, Thylogale stigmatica, Petrogale godmani and P. brachyotis. Coronostrongylus barkeri, sp. nov. is most prevalent in Onychogalea unguifera, but occurs also in M. rufus, M. robustus and P. brachyotis. Coronostrongylus closei, sp. nov. is restricted to Petrogale persephone. Coronostrongylus sharmani, sp. nov. occurs only in rock wallabies from eastern Australia: P.�coenensis, P. godmani and P. mareeba; C. spratti, sp. nov. occurs in P. inornata and P. assimilis. Coronostrongylus spearei, sp. nov. is restricted to Papua New Guinea where it is found in Dorcopsulus vanhearni, Dorcopsis hageni and D. muelleri. Although all of the nematode species occur in one principal host species or a series of closely related host species, occurrences in geographically disjunct areas and in phylogenetically distant hosts are features of C. coronatus, C. barkeri, sp. nov. and C. johnsoni, sp. nov. The occurrence of seven closely related nematode species found in a wide range of macropodid host species is more readily accounted for by a hypothesis involving multiple colonisations of hosts than by the hypothesis of co-speciation.

scholarly journals Elevational gradient of Hemiptera (Heteroptera, Auchenorrhyncha) on a tropical mountain in Papua New Guinea

PeerJ ◽  
2015 ◽  
Vol 3 ◽  
pp. e978 ◽  
Author(s):  
Maxime Le Cesne ◽  
Stephen W. Wilson ◽  
Adeline Soulier-Perkins
Keyword(s):  
Papua New Guinea ◽  
New Guinea ◽  
Elevational Gradient ◽  
Tropical Mountain

Aulacaspis (Homoptera: Diaspididae) on sugarcane and other Saccharum spp. (Gramineae)

1993 ◽  
Vol 83 (4) ◽  
pp. 649-654
Author(s):  
D.J. Williams ◽  
Gillian W. Watson
Keyword(s):  
Papua New Guinea ◽  
Related Species ◽  
New Guinea ◽  
Scale Insect ◽  
Saccharum Officinarum ◽  
Washington Dc ◽  
Closely Related Species ◽  
Saccharum Spp ◽  
The World ◽  
Potential Pest

AbstractA brief review is given of species of Coccoidea found on sugarcane (Saccharum officinarum) in the island of New Guinea. A key and comments on all the species of Aulacaspis that have been recorded on sugarcane and other Saccharum spp. throughout the world is presented. The scale insect Aulacaspis neoguineensis Williams & Watson sp. n. is described from specimens on sugarcane intercepted at Washington, DC, USA from Papua New Guinea because it is a potential pest of sugarcane. It is compared with A. madiunensis (Zehntner), a closely-related species often injurious to sugarcane in southern Asia, Australia and Africa.

River intake works for a hydroelectric plant in Papua New Guinea

1990 ◽  
Vol 17 (4) ◽  
pp. 578-589 ◽  
Author(s):  
P. S. McCreath ◽  
C. R. Neill ◽  
L. F. Sawatsky ◽  
M. C. Mannerstrom
Keyword(s):  
Papua New Guinea ◽  
Hydroelectric Plant ◽  
Operating Experience ◽  
New Guinea ◽  
Design Stage ◽  
Mountain Stream ◽  
Coarse Sediment ◽  
Organic Debris ◽  
Sediment Loads ◽  
Hydraulic Behaviour

The Ok Tedi mining development in Papua New Guinea is served by a 50 MW hydroelectric plant completed in 1988. The plant draws water from a run-of-river intake on the Ok Menga, a torrential mountain stream in tropical rain forest subject to frequent flash floods and carrying substantial sediment loads. Design and construction of a diversion weir and intake posed a number of severe problems, such as difficult access, the torrential and flashy nature of the river flows, severe constraints on location due to unstable banks and substrata, and uncertain loads of sediment and debris. Site investigations of a hydro technical nature included monitoring of precipitation, streamflow and flood levels, sampling of suspended sediment, and special measurements of bed material and bed load. On the basis of these investigations, preliminary concepts were developed for a diversion weir and intake chamber. A hydraulic model was then constructed to examine alternative forms of weir construction and to study the hydraulic behaviour of various intake chamber designs with special attention to exclusion and ejection of coarse sediment. The final design was based largely on the indications of the model study. Initial operating experience generally confirmed the validity of the design, although one or two problems arose that were not sufficiently appreciated at the design stage. These were mainly associated with organic debris and with excessive inflow of coarse sediment due to inexperienced operation. Relatively minor changes were made in operational procedures and equipment in order to remedy these problems. Key words: river, intake, sediment, diversion, weir, bedload, debris, torrent.

Public Health in Papua New Guinea

1989 ◽  
Author(s):  
Donald Denoon ◽  
Kathleen Dugan ◽  
Leslie Marshall
Keyword(s):  
Public Health ◽  
Papua New Guinea ◽  
New Guinea
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