Effects of forestry activities (clearfelling) on stream macroinvertebrate fauna in south-western Australia

1994 ◽  
Vol 45 (6) ◽  
pp. 963 ◽  
Author(s):  
IO Growns ◽  
JA Davis
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Western Australia ◽  
Macroinvertebrate Community ◽  
Total Abundance ◽  
Inorganic Solids ◽  
South West ◽  
Before And After ◽  
Stream Macroinvertebrate ◽  
Macroinvertebrate Fauna

The effects of forestry activities on macroinvertebrate community structure were examined in the headwaters of Carey Brook in the south-west of Australia. The fauna at four sites on an upland stream that ran through a logging coupe were compared, before and after clearfelling, with the fauna at four nearby undisturbed sites. Mean species richness and mean total abundance declined at the treatment sites relative to the control sites after the commencement of clearfelling activities. The composition of the macroinvertebrate fauna in the disturbed stream changed in comparison with that in the undisturbed sites after logging started but returned to the pre-logging composition after winter and spring rains had stopped. The observed changes in the macroinvertebrate fauna occurred during the periods of high loads of suspended inorganic solids at the treatment sites. The possible reasons for the observed results are discussed.

Patterns of Distribution of Acacia in Australia

1988 ◽  
Vol 36 (4) ◽  
pp. 385 ◽  
Author(s):  
BR Maslin ◽  
L Pedley
Keyword(s):  
Species Richness ◽  
Western Australia ◽  
Arid Zone ◽  
Patterns Of Distribution ◽  
The North ◽  
Geographic Patterns ◽  
South West ◽  
Eastern Australia ◽  
Semiarid Areas ◽  
The Tropics

Patterns of distribution are described for the three subgenera and nine sections that make up the Australian Acacia flora. Subgenus Phyllodineae (833 species) is widespread and contains 99% of the species; subgenus Acacia (six species) and subgenus Aculeiferum (one species) are poorly represented and virtually confined to the north of the continent. The geographic patterns of species-richness are strongly influenced by sections Phyllodineae (352 species), Juliflorae (219 species) and Plurinerves (178 species). Section Phyllodineae has centres of richness south of the Tropic of Capricorn in temperate and adjacent semiarid areas of eastern, south-eastern and south-western Australia. The section is poorly represented in the tropics. The closely related sections Juliflorae and Plurinerves predominate in the north of the continent, semiarid areas of the south-west, many rocky tablelands of the Arid Zone and along the Great Dividing Range and adjacent inland riverine lowland areas in eastern Australia. The remaining four sections contribute little to the overall patterns of species-richness. The principal speciespoor areas are sandy and fluvial lowland regions of the Arid Zone. In eastern Australia, sections Botrycephalae, Juliflorae, Phyllodineae and Plurinerves show discontinuous patterns of species-richness along the Great Dividing Range. All sections have species whose ranges terminate in the area of the McPherson-Macleay Overlap region.

Spatial distribution of species richness and endemism of the genus Acacia in Australia

2011 ◽  
Vol 59 (7) ◽  
pp. 601 ◽  
Author(s):  
Carlos E. González-Orozco ◽  
Shawn W. Laffan ◽  
Joseph T. Miller
Keyword(s):  
Spatial Distribution ◽  
Species Richness ◽  
Western Australia ◽  
Grid Cell ◽  
Grid Cells ◽  
The South ◽  
Cell Radius ◽  
South West ◽  
Wet Tropics ◽  
Neighbourhood Analysis

The aim of this study is to identify and map the spatial distribution of species richness and endemism of the genus Acacia in Australia. A database of 171 758 geo-referenced herbarium records representing 1020 Acacia species was assembled and aggregated to a 0.25° grid cell resolution. A neighbourhood analysis of one-cell radius was applied to each of the grid cells to map the spatial patterns of species richness and endemism. The primary centres of species richness are in accordance with previous results, occurring in the South-West Botanical Province in Western Australia, the MacPherson-Macleay overlap and the Central Coast of the Sydney Sandstone region. We identify 21 centres of endemism, of which six were previously unrecognised. The primary centres of endemism are located in South-West Western Australia, the Kimberley District and the Wet Tropics in Queensland. The South-West Botanical Province in Western Australia contained the greatest number of regions with the highest number of endemic species of Acacia. A randomisation test showed that our 21 centres of endemism were significantly different from random. The majority of centres of Acacia endemism were incongruent with the centres of species richness, with only three grid cells in the top 1% for both measures. We also confirm that South-West Western Australia is a region of very high species richness and endemism, in accordance with its status as a global hotspot of biodiversity.

scholarly journals Do bird species richness and community structure vary with mistletoe flowering and fruiting in Western Australia?

2014 ◽  
Vol 114 (1) ◽  
pp. 13-22 ◽  
Author(s):  
Kathryn R. Napier ◽  
Suzanne H. Mather ◽  
Todd J. McWhorter ◽  
Patricia A. Fleming
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Western Australia ◽  
Bird Species ◽  
Bird Species Richness

Variation in fire interval sequences has minimal effects on species richness and composition in fire-prone landscapes of south-west Western Australia

2011 ◽  
Vol 261 (6) ◽  
pp. 965-978 ◽  
Author(s):  
Roy S. Wittkuhn ◽  
Lachie McCaw ◽  
Allan J. Wills ◽  
Richard Robinson ◽  
Alan N. Andersen ◽  
...  
Keyword(s):  
Species Richness ◽  
Western Australia ◽  
South West ◽  
In Fire

Salamander diversity alters stream macroinvertebrate community structure

2013 ◽  
Vol 58 (10) ◽  
pp. 2114-2125 ◽  
Author(s):  
S. Conor Keitzer ◽  
Reuben R. Goforth
Keyword(s):  
Community Structure ◽  
Macroinvertebrate Community ◽  
Stream Macroinvertebrate

Short-term logging and burning impacts on species richness, abundance and community structure of birds in open eucalypt forest in Western Australia

2003 ◽  
Vol 30 (4) ◽  
pp. 321 ◽  
Author(s):  
Ian Abbott ◽  
Amanda Mellican ◽  
Michael D. Craig ◽  
Matthew Williams ◽  
Graeme Liddelow ◽  
...  
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Western Australia ◽  
Bird Species ◽  
The Other ◽  
Short Term ◽  
Eucalyptus Marginata ◽  
External Reference ◽  
One Year ◽  
The Impact

In 1985 new silvicultural prescriptions for managing jarrah (Eucalyptus marginata) forest in south-west Western Australia came into operation. The most extreme logging treatment (gap release) involved removal of most of the overstorey from patches no larger than 10 ha, followed by a regeneration fire. In the other logging treatment (shelterwood), less wood was removed from a larger area, also followed by a fire. This study examined the impact of these disturbances on the avifauna by monitoring species richness and abundance of birds one year before logging, one year before burning, and for five years after burning. Although 68 bird species were recorded during the seven years of the study, 29 of these were detected fewer than 15 times. Of the other 39 bird species recorded, only two (Gerygone fusca and Acanthiza apicalis) showed a statistically significant treatment effect over time on their abundance. The abundance of G. fusca initially declined in the disturbed treatments and by Year 7 of the study (5 years post-fire) in the gap-release treatment had not recovered its original abundance. A. apicalis increased its abundance in both shelterwood and gap-release treatments. By Year 7, both species in the logged treatments had abundances similar to those in the unlogged treatments. Total abundance of all species varied little across treatments. Species richness was highest by Year 7 in the shelterwood and lowest in the gap-release treatment. In some years community structure varied more at the external-reference sites (not recently logged or burnt) than at the gap-release sites. In particular, there was little overlap in community structure in the external-reference treatment between the first and final years, whereas the pre-logging and final year in the gap-release treatment showed a high degree of overlap. These differences are suggestive of overriding short-term annual variation in broad-scale factors rather than local factors. Yearly variation in rainfall and temperature was documented; during low rainfall periods, populations of foliage arthropods may have been reduced.

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