Spatial distribution of infectious stages of the nematode Syngamus trachea within pheasant ( Phasianus colchicus ) release pens on estates in the South West of England: Potential density dependence?

2015 ◽  
Vol 212 (3-4) ◽  
pp. 267-274 ◽  
Author(s):  
O.J. Gethings ◽  
R.B Sage ◽  
S.R Leather
Keyword(s):  
Spatial Distribution ◽  
Density Dependence ◽  
Phasianus Colchicus ◽  
The South ◽  
Potential Density ◽  
South West ◽  
Syngamus Trachea

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.

Middle and Late Iron Age Occupation at Cadnam Farm, Alton, Hampshire

2018 ◽  
Vol 73 (1) ◽  
pp. 110-136
Author(s):  
Oliver Good ◽  
Richard Massey
Keyword(s):  
Iron Age ◽  
The South ◽  
Late Iron Age ◽  
South West ◽  
Middle Iron Age

Three individual areas, totalling 0.55ha, were excavated at the Cadnam Farm site, following evaluation. Area 1 contained a D-shaped enclosure of Middle Iron Age date, associated with the remains of a roundhouse, and a ditched drove-way. Other features included refuse pits, a four-post structure and a small post-built structure of circular plan. Area 2 contained the superimposed foundation gullies of two Middle Iron Age roundhouses, adjacent to a probable third example. Area 3 contained a small number of Middle Iron Age pits, together with undated, post-built structures of probable Middle Iron Age date, including a roundhouse and four and six-post structures. Two large boundary ditches extended from the south-west corner of Area 3, and were interpreted as the funnelled entrance of a drove-way. These contained both domestic and industrial refuse of the late Iron Age date in their fills.

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