Range and habitat associations of the native macroalga Caulerpa filiformis in New South Wales, Australia

2015 ◽  
Vol 66 (11) ◽  
pp. 1018 ◽  
Author(s):  
Tim M. Glasby ◽  
Peter. T. Gibson ◽  
Gregory West ◽  
Peter Davies ◽  
Sofietje Voerman
Keyword(s):  
New South ◽  
New South Wales ◽  
Habitat Associations ◽  
Disjunct Distribution ◽  
Species Introduction ◽  
Isolated Populations ◽  
Rocky Reefs ◽  
South Wales ◽  
Green Seaweed ◽  
Natural Range

Caulerpa filiformis is a green seaweed found in New South Wales (NSW, Australia), South Africa, Mozambique and Peru. It has been suggested that the abundance of the species has increased in NSW over recent decades. Extensive aerial and diver surveys identified a 500-km northerly extension to the range of C. filiformis in NSW (to 28°21′S) compared with previous records. The alga has a disjunct distribution with small isolated populations around rocky headlands in far northern NSW, but then no apparent populations for 350km southwards. The far northern populations could be the result of recent human-mediated transport (a species introduction), or were simply not detected previously. The increased distribution around the previous northerly limit is likely a natural range expansion. The distribution of C. filiformis in NSW and globally seems confined to a temperature range of ~16–23°C. We found no relationship between abundance of C. filiformis and human population or oceanic chlorophyll-a (a surrogate for nutrient availability). We demonstrate that C. filiformis is predominately subtidal, being found along sections of coastline where there is a mixture of rocky reefs and beaches. It is argued that sand movement may have facilitated increases in abundance of C. filiformis.

Detection of the eastern pygmy-possum Cercartetus nanus (Marsupialia: Burramyidae) at Barren Grounds Nature Reserve, New South Wales.

2005 ◽  
Vol 27 (1) ◽  
pp. 85 ◽  
Author(s):  
JM Harris ◽  
RL Goldingay
Keyword(s):  
New South ◽  
Survey Methods ◽  
Conservation Status ◽  
New South Wales ◽  
Detection Methods ◽  
Isolated Populations ◽  
South Eastern ◽  
Nest Boxes ◽  
South Wales ◽  
Cercartetus Nanus

THE eastern pygmy-possum (Cercartetus nanus) has an extensive distribution, from south-eastern Queensland to south-eastern South Australia, and also into Tasmania (Strahan 1995). Despite this it is rarely detected in fauna surveys (Bowen and Goldingay 2000). This rarity in detection suggested that the species may be characterised by small and isolated populations, and therefore vulnerable to extinction. Consequently, it became listed as a 'Vulnerable' species in New South Wales (NSW) in 2001. Unless resolved, the low rate of detection of C. nanus will continue to hinder the acquisition of basic ecological information that is needed to more clearly define its conservation status and that is fundamental to the development of a recovery plan. An extensive body of survey data for NSW involving C. nanus has been reviewed by Bowen and Goldingay (2000). Among a range of survey methods aimed at detecting this species, trapping within flowering banksias and checking installed nest-boxes had the highest rates of detection. Indeed, one study in northern NSW captured 98 individuals over a 3- year period from within nest-boxes (Bladon et al. 2002). All other studies detected fewer than 15 C. nanus. It is clear that further research is required to investigate the effectiveness of a range of detection methods.

Gene flow, colonisation and demographic history of the flat oyster Ostrea angasi

2005 ◽  
Vol 56 (8) ◽  
pp. 1099 ◽  
Author(s):  
David A. Hurwood ◽  
Mike P. Heasman ◽  
Peter B. Mather
Keyword(s):  
New South ◽  
Demographic History ◽  
New South Wales ◽  
Homogeneous Population ◽  
South Wales ◽  
Base Pair Fragment ◽  
Population Structuring ◽  
History Of ◽  
Natural Range ◽  
Flat Oyster

The Australian flat oyster Ostrea angasi is currently being assessed for its potential as a species for culture in New South Wales. It is considered important to determine the population genetic structure of wild stocks among estuaries before translocation of juveniles (spat) for growout in order to avoid possible deleterious effects of hybridisation of genetically divergent stocks (i.e. outbreeding depression). Five estuaries were sampled in southern New South Wales as well as another four from across the natural range of the species in Australia. Sequence analysis of a 594 base pair fragment of the mitochondrial cytochrome oxidase I gene was used to determine the degree of population structuring inferred from pairwise ΦST estimates and spatial analysis of molecular variance analysis. The analyses revealed that there is no significant genetic differentiation among the sampled New South Wales estuaries (P > 0.05) and all eastern samples represent a geographically homogeneous population. This essentially removes any potential constraints on broodstock sourcing and spat translocation within this region. Although levels of differentiation among all sites varied, little divergence was evident across the entire range of the sample. Furthermore, the study revealed extremely low levels of divergence between O. angasi and its northern hemisphere congener, O. edulis, raising the possibility that O. angasi may have only recently colonised Australian estuaries.

The discovery of the orb-weaving spider genus Pinkfloydia (Araneae, Tetragnathidae) in eastern Australia with description of a new species from New South Wales and comments on the phylogeny of Nanometinae

Zootaxa ◽  
2017 ◽  
Vol 4311 (4) ◽  
pp. 480 ◽  
Author(s):  
GUSTAVO HORMIGA
Keyword(s):  
New Species ◽  
New South ◽  
New South Wales ◽  
Mitochondrial Protein ◽  
Morphological Data ◽  
Disjunct Distribution ◽  
South Wales ◽  
Eastern Australia ◽  
Protein Encoding ◽  
A New Species

A new species of the Australian genus Pinkfloydia, P. rixi new species, is described and illustrated. This new tetragnathid species is known only from the type locality in the eastern part of New South Wales, more than 3,200 km away from the distribution range of it sister species from Western Australia, P. harveii Dimitrov & Hormiga, 2011. The nature of such a disjunct distribution is discussed based on morphological data and on the nucleotide sequence of the mitochondrial protein-encoding gene cytochrome c oxidase subunit I. The placement of Pinkfloydia in the subfamily Nanometinae and recent advances in the phylogeny of Tetragnathidae are also discussed. 

scholarly journals Humans as predators on rocky reefs in New South Wales, Australia

1991 ◽  
Vol 72 ◽  
pp. 1-14 ◽  
Author(s):  
MJ Kingsford ◽  
AJ Underwood ◽  
SJ Kennelly
Keyword(s):  
New South ◽  
New South Wales ◽  
Rocky Reefs ◽  
South Wales

Distribution, habitat, and conservation status of the Giant Barred Frog Mixophyes iteratus in the Bungawalbin catchment, northeastern New South Wales

2005 ◽  
Vol 11 (3) ◽  
pp. 189 ◽  
Author(s):  
B. D. Lewis ◽  
D. A. Rohweder
Keyword(s):  
New South ◽  
Conservation Status ◽  
New South Wales ◽  
Habitat Assessment ◽  
Isolated Populations ◽  
South Wales ◽  
Habitat Analysis ◽  
Stream Bank ◽  
Components Analysis ◽  
Habitat Variables

A distribution and habitat assessment was used to determine the conservation status of the Giant Barred Frog Mixophyes iteratus in the Bungawalbin catchment in northeastern New South Wales. Repeated surveys were used to collect presence absence data at 70 sites between January 1997 and March 1999. Giant Barred Frogs were found at 23 sites (33%) comprising five isolated populations which may have contracted from a single remnant population. Habitat analysis revealed frogs showed a significant preference for sites with pool riffle sequences and the presence of undercuts and overhanging vegetation on the primary stream bank. Principal Components Analysis identified five habitat variables that accounted for 73% of the variability in our bi-variate data. We found the level of disturbance to riparian and instream habitats significantly influenced frog distribution, but this trend was not apparent when adjacent habitats outside the riparian zone were analysed. We propose that sedimentation of waterways may have facilitated this decline due to a reduction in the permanency of surface water flows resulting in reduced recruitment opportunities.

Spatial patterns of ascidian assemblages on subtidal rocky reefs in the Port Stephens - Great Lakes Marine Park, New South Wales

2007 ◽  
Vol 58 (9) ◽  
pp. 843 ◽  
Author(s):  
Kathryn L. Newton ◽  
Bob Creese ◽  
David Raftos
Keyword(s):  
Great Lakes ◽  
Spatial Patterns ◽  
New South ◽  
New South Wales ◽  
Marine Biodiversity ◽  
Rocky Reefs ◽  
Marine Park ◽  
South Wales ◽  
Subtidal Rocky Reefs ◽  
Port Stephens

Spatial and temporal patterns of variability in ascidian assemblages were investigated on horizontal subtidal rocky reefs at Port Stephens, New South Wales (NSW). The study was designed to provide a baseline dataset on ascidian diversity and distribution patterns for an area destined to become a marine park (the Port Stephens–Great Lakes Marine Park: PSGLMP). Differences in ascidian assemblages between exposed oceanic island reefs and sheltered reefs within Port Stephens, and between two depth zones within each subtidal reef, were quantified using non-parametric multivariate techniques coupled with analysis of variance (ANOVA). Ascidian assemblages were highly variable between reef sites, reef exposures and particularly between depth zones within each reef surveyed. However, temporal variation was only observed for a few ascidian species. These highly variable spatial patterns in diversity indicate that numerous subtidal reefs may need to be protected within PSGLMP if the aim of the marine park is to adequately represent the entire array of marine biodiversity in the area.

Population suppression in the Queensland fruit fly, Dacus (Strumeta) Tryoni. II. Experiments on isolated populations in Western New South Wales

1966 ◽  
Vol 17 (5) ◽  
pp. 699 ◽  
Author(s):  
MA Bateman ◽  
AH Friend ◽  
F Hampshire
Keyword(s):  
Large Scale ◽  
New South ◽  
Combined Treatment ◽  
New South Wales ◽  
Fruit Fly ◽  
Isolated Populations ◽  
South Wales ◽  
Complete Discussion ◽  
Excellent Control ◽  
Scale Control

This is the second paper in a series describing experiments designed to investigate the potential usefulness of chemical lures for the suppression of isolated populations of the Queensland fruit fly. The experiments reported here were done in two consecutive years and involved 12 country towns in central and north-central New South Wales. Three of the towns were treated with a male-attractant plus an insecticide; three were treated with a general lure plus an insecticide; three others received a combination of both treatments; and the remaining three were left untreated for comparison. In the first year neither single treatment had any significant effects on the populations, while the double treatment achieved an acceptable level of control. In the second year the performances of both single treatments improved greatly, while the combined treatment gave excellent control. It is shown that isolated populations of fruit fly can be suppressed by these means.The implications of these results for future large-scale control of the Queensland fruit fly are discussed briefly. More complete discussion must await publication of further developments of this work, which will be reported in later papers in this series.

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