Ian Cowie

Ian Cowie
Northern Territory Herbarium, Australia, Palmerston · Department of Environment and Natural Resources

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30
Publications
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Publications

Publications (30)
Preprint
Full-text available
Species radiations have long fascinated biologists, but the contribution of adaptation to observed diversity and speciation is still an open question. Here, we explore this question using the clove genus, Syzygium, the world’s largest genus of tree species comprising approximately 1200 species. We dissect Syzygium diversity through shotgun sequenci...
Article
Plot-based vegetation data have been collected in the Northern Territory since the 1950s. The purpose of data collection broadly includes land resource and vegetation community mapping, flora surveys, habitat assessment for fauna surveys, rare and threatened species surveys, development assessment and monitoring. These datasets were stored in dispa...
Article
Understanding the distribution of plant species and vegetation communities is important for effective conservation planning and ecosystem management, but many parts of the world remain under-surveyed. The Top End of Australia’s Northern Territory is vast, remote, and sparsely populated; knowledge of the flora, in many areas, is limited to common or...
Article
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A new tropical species, Thismia tectipora Cowie from Melville Island in the far north of the Northern Territory, Australia, is described and illustrated. The species is unique in the genus in having a thickened, fleshy, verrucose, cap-like mitre, the rim of which is reflexed to hide the pores in the upper perianth tube. It appears allied to taxa pr...
Article
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A new species of small tree, Cochlospermum arafuricum Cowie & R.A.Kerrigan sp. nov. from the wet-dry tropics of Australia is described and illustrated here. The species is distinctive in having the leaves divided for 1/3-1/2 of their length with broadly triangular, aristate leaf lobes, conspicuously serrate margins, red outer staminal filaments and...
Article
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Maslin, B.R. & Cowie, I.D. Acacia equisetifolia, a rare, new species of Acacia sect. Lycopodiifoliae (Fabaceae: Mimosoideae) from the Top End of the Northern Territory. Nuytsia 24: 1-5 (2014). Acacia equisetifolia Maslin & Cowie, a new species known only from Kakadu National Park, Northern Territory, is described. The new species, formerly known by...
Article
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Research was undertaken to identify Fusarium spp. associated with an endemic wild rice (Oryza australiensis) community in northern Australia and determine the incidence of species reported as pathogens of tropical grain crops. A total of 92 isolates representing six Fusarium species were recovered from O. australiensis. Taxa were delimited based on...
Article
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A new, rare species, Atalaya brevialata Cowie & G.M.Wightman is described and illustrated. The species is unusual in the genus in having a greatly reduced wing on the samara and the suffruticose growth habit, the latter perhaps an adaption to the region's wet-dry tropical climate and prevailing near-annual fire regime. It appears to have a restrict...
Article
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Six new species and a new subspecies of Helicteres from the wet – dry tropics of the Northern Territory, Australia are described and illustrated (H. darwinensis, H. kombolgiana, H. macrothrix, H. serpens, H. sphaerotheca, H. tenuipila and H. cana subsp. latifolia). Methorium integrifolium is reinstated as a species and a new combination is made in...
Article
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Aristida jacobsiana is described as a new species from the north of the Northern Territory and north Queensland. It belongs to section Macrocladae B.K.Simon and is morphologically similar to both Aristida longicollis (Domin) Henrard and Aristida psammophila Henrard. It differs from the former by the lemma apex being smooth or scabrous only on the k...
Article
1. We used the composition of nest middens to describe the extent of dietary partitioning in an exceptionally diverse assemblage of harvester ants in the Kakadu region of northern Australia. Eight of the >15 harvester species known from adjacent 30 × 30-m plots, comprising four species of Meranoplus and two species each of Monomorium and Pheidole,...
Article
Full-text available
A minute, reddish-purple-flowered, new species of Utricularia L. subgenus Utricularia (Lentibulariaceae) is described and illustrated: Utricularia simmonsii Lowrie, Cowie & Conran from the western Top End of the Northern Territory and near Lockhart River and Tozer's Gap, Iron Range in far north Queensland. The species represents possibly the world'...
Article
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`Lost from our landscape: threatened species of the Northern Territory' provides comprehensive information on the Northern Territory's threatened plant and animals species. For each of the 203 species that have been included, a full dossier has been provided - the result of extensive work by researchers from the Northern Territory Department of Nat...
Article
The distributions of the 567 plant species considered to be endemic to the Northern Territory, Australia, were collated from a distributional database comprising about 600 000 records. Endemic species comprise a nonrandom taxonomic subset of all plants known from the Northern Territory. Because of substantial geographic disparity in collecting effo...
Article
Full-text available
Targeted searches of approximately 150 km of cliff lines for two rare sandstone shrubs, Melaleuca triumphalis Craven and Stenostegia congesta A.R.Bean, thought to be restricted to the Victoria River gorge system within Gregory National Park, increased the number of known populations from 3 and 6 to 31 and 37, respectively. Both species occur predom...
Article
Full-text available
Tree populations in the wooded savannas of northern Australia lack a well developed seed bank, but instead rely on a persistent ground layer of suppressed juvenile plants < 1m of indeterminate ages. The feral Asian water buffalo has been implicated as a factor in inhibiting the movement of juvenile trees to sapling stage. In a 6-year field study in...
Article
This paper reviews published and other works relating, either directly or indirectly, to the aquatic plants and wetlands in the Darwin Harbour Catchments. Although some data are available, wetlands and aquatic plants of the area are yet to be systematically surveyed and the processes at work are frequently poorly understood. The area contains 65% o...
Article
Summary1. We used the composition of nest middens to describe the extent of dietary partitioning in an exceptionally diverse assemblage of harvester ants in the Kakadu region of northern Australia. Eight of the >15 harvester species known from adjacent 30 × 30-m plots, comprising four species of Meranoplus and two species each of Monomorium and Phe...
Article
Vegetation patterning is described for two neighbouring continental island chains off Arnhem Land, Australia. A total of 684 species was recorded from 57 islands, with reasonably comprehensive lists for 36 of these islands. Almost 90% of the deviance in plant species richness was associated with island size. The richness of plants dispersed by sea...
Article
The data from five vegetation surveys on the Tiwi Islands in north Australia were compiled to examine the habitat preference of naturalised alien plant species. Eucalyptus forest, Callitris forest, Melaleuca woodland, Acacia scrubland and monsoon rainforest had very few alien plant species. Of the ten alien plant species that have become naturalise...
Chapter
Perennial weeds capable of invading relatively undisturbed native plant communities represent one of the greatest challenges for land management authorities in the Kakadu region. With their potential for dispersal and rapid population growth, these invasive species (especially Mimosa pigra) can severely modify natural communities in the region over...
Article
Full-text available
A survey of the distribution and abundance of invasive alien plant species in Kakadu National Park in Australia's tropical Northern Territory was undertaken to provide a basis for management. Some 5·8% (89 species) of the vascular flora of Kakadu were considered invasive aliens. The majority of these species were either rare in distribution or wide...
Article
Litterfall from a Melaleuca forest was investigated as part of chemical cycling studies on the Magela Creek floodplain in tropical, northern Australia. The forest contained two species of tree, Melaleuca cajaputi and Melaleuca viridiflora, with a combined average density of 294 trees ha–1. The M. viridiflora trees had diameter breast height measure...
Article
The size and species composition of plant populations arising from sediment seedbanks of three communities (Pseudoraphis, Hymenachne and Oryza grasslands) on the Magela Creek floodplain were compared under experimental (moist and flooded) conditions. The mean number of seedlings produced in the moist-treatment ranged from 8000 to 15 400 m−2, and in...
Chapter
Describes the physico-chemical and biological characteristics of the 250 km2 of the Magela floodplain. The phytoplankton community is very diverse with >160 diatom taxa and 530 taxa from other groups. Chlorophyll values were not generally high except during blooms. The macrophytic flora was also diverse with 225 species, 139 being annuals. The flor...

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Project
Mapping and surveying the coastal marine biodiversity and habitats of Timor-Leste to support sustainable development.