Journal articles on the topic 'Stream ecology Victoria La Trobe River'

Phytoplankton was sampled on a monthly basis for 1 year at five stations on the La Trobe River in Gippsland, Victoria. In the upper, mostly forested, reaches of the river, chlorophyll a concentrations and cell densities were uniformly very low, and the dominant algae were detached benthic diatoms and flagellated species. In the plains section of the river, downstream of an impoundment (Lake Narracan), spring and autumn blooms occurred, with a marked reduction in abundance in midsummer and midwinter. The lowland planktonic flora was dominated by centric diatoms, particularly Melosira distans in autumn and Skeletonema potamos in spring.

Diel oxygen-curve techniques were used to estimate gross primary productivity (PG), community respiration and net daily metabolism (NDM) for five reaches of the La Trobe River from headwaters to lowlands. All reaches were heterotrophic throughout the study (December 1980-November 1981) with NDM ranging from - 1 to -6 g O2 m-2. PG was consistently very low at the most upstream station and highest in the middle reaches of the river, where both benthic and planktonic contributions were important. At the most downstream station benthic productivity was negligible but planktonic productivity was appreciable in spring and autumn. PG in the river may be limited in the upper reaches by lack of light (due to shading by vegetation) and low levels of nutrients, and in the lower reaches by turbidity and increased depth.

Between February 1975 and March 1977, periphyton from artificial substrata (glass microscope slides) and water samples for physicochemical analysis were obtained from eight sites on the lowland section of the La Trobe River, which flows through agricultural, urban and industrial areas. Total organic matter on the slides, estimated as weight loss on ignition, was usually highest in summer or autumn when river flows were low. However, chlorophyll a densities generally peaked in late winter and spring when nitrate concentrations were high, except at a site upstream of major urban and industrial areas, where a summer-autumn increase occurred. Thermal discharges from major power stations had no obvious effect on chlorophyll abundance, but did appear to substantially influence diatom assemblage composition from late summer to early winter, when river temperatures were highest. Downstream of the Morwell River confluence, diatom assemblages were influenced by a sharp increase in dissolved solids concentration and probably also by the grazing activities of snails (Ferrissia petterdi and Physastra gibbosa). The diatom flora at the most downstream site showed some evidence of recovery from thermal effects.

Annual production was estimated by the size-frequency method for Ephemeroptera (Tasmanocoenis tonnoiri, two species of Baetis, Atalonella spp., Atulophlebioides sp.), Plecoptera (Leptoperla spp.) and Trichoptera (Ecnomus sp.) at four sites on the lowland section of the La Trobe River. Annual production (P) of individual ephemeropteran species (or genera) varied from 0.02 to 0.7 g m-2 while total annual production of this order at two sites was 0.7-1 . 5 g m-. Annual production of Leptoperla spp. was 0.03 g m-2 at one site while Ecnomus sp, averaged 2 g m-2 at two sites. Estimates of annual production were subject to an error of at least t 50%. Annual turnover ratios (P/B; B is mean biomass) varied from 9 to 19 and were three to four times higher than published values for similar-sized macroinvertebrates in the temperate zone (generally < 15°C mean annual habitat temperature). This probably resulted from the higher average temperatures (17-18°C) at most sites.

The robustness of site groupings produced by ordination (DECORANA) and classification (TWINSPAN) techniques to variations in the quality of the raw data was investigated, using two data sets on macroinvertebrate communities from the La Trobe River. Ordinations or classifications based on the presence or absence of species were not substantially different from those based on actual abundance levels. However, when taxonomic discrimination was reduced from the species (or genus) level to the family level, distortions occurred in the resulting ordinations and classifications. In addition, ordinations based on 10 replicates per sample were little different from those based on a subset of 5 or 6 of these replicates; fewer than 4 replicates did not adequately represent the patterns present in the full data set.

Following severe and prolonged drought, flows in parts of the lower LaTrobe River reached record lows in February 1983. Consequent lack of dilution for wastewater discharges resulted in marked deterioration of water quality, with dissolved oxygen concentration dropping to 2 g m-3 and electrical conductivity rising to 115 mS m-1. Despite these changes there was little alteration in the taxonomic richness or composition of the aquatic macroinvertebrate fauna. Faunal richness in the river downstream from Yallourn was low both before and after the drought, but the causative factors remain obscure.

Abstract In this paper the environment, climate, vegetation, indigenous and European settlement history, stream flow patterns, water quality and water resources development in western Victoria, Australia are studied. The last part of the paper focuses on the MacKenzie River, a tributary of the Wimmera River located on the northern slopes of the Grampians Ranges in western Victoria, Australia. Water release along the MacKenzie River was regulated to improve water quality, stream condition and river health especially in the downstream reaches. The upstream section tends to receive water most days of the year due to releases to secure the requirements of water supply for the city of Horsham and its recreational and conservation values, which is diverted into Mt Zero Channel. Below this the middle and downstream sections receive a more intermittent supply. Annually, a total of 10,000 dam3 of water is released from Wartook Reservoir into the MacKenzie River. Of this volume, only about 4,000 dam3 was released explicitly for environmental purposes. The remaining 6,000 dam3 was released to meet consumptive demands and to transfer water to downstream reservoirs. The empirical data and models showed the lower reaches of the river to be in poor condition under low flows, but this condition improved under flows of 35 dam3 per day, as indicated. The results are presented to tailor discharge and duration of the river flows by amalgamation of consumptive and environmental flows to improve the condition of the stream, thereby supplementing the flows dedicated to environmental outcomes. Ultimately the findings can be used by management to configure consumptive flows that would enhance the ecological condition of the MacKenzie River.

Eleven stream stations within the basins of the Bemm, Cann, Thurra, Wingan and Genoa Rivers were sampled during a 3-month interval following a prolonged drought and intense and extensive forest fires. Emphasis was placed on flows resulting from three major storms that occurred during this period. Water-quality impacts of the fires were intermingled with those of the preceding drought, and flow- related comparisons with pre-drought data showed appreciable increases in colour, turbidity, suspended solids, potassium and nitrogen levels in the Bemm River, which was only marginally affected by the fires. In the Cann and Genoa Rivers, with much larger proportions of catchment burnt, electrical conductivity and phosphorus concentrations also rose substantially. Marked depletion of dissolved oxygen (to <6 mg I-1) was unique to streams with burnt catchments, but resulted from stagnant conditions at the end of the drought as well as from changes occurring at the time of the first post-fire storm. The fires had little obvious effect on temperature and pH regimes. Peak turbidities and concentrations of suspended solids and phosphorus were much greater in the Cann and Genoa river systems than elsewhere. Maximum values for these indicators were 130 NTU, 2300 mg I-1 and over 0.8 mg I-1, respectively. In the Thurra and Wingan basins, which were also burnt, stream suspended-solids levels were lower (<200 mg I-1), but solutes sometimes reached very high maxima (indicated by peak electrical conductivities of up to 110 mS m-1). Variations in catchment topography and soils and the relative importance of surface and subsurface flow probably account for these differences. The first post-fire storm produced the highest measured levels of many indicators in most streams, although the greatest flows were associated with the third storm. Nitrite and ammonia were notable exceptions to this generalization. Estimates of catchment exports indicated high sediment yields and moderate to high phosphorus yields from the Cann and Genoa catchments, by comparison with other Australian data.

The activity of benthic invertebrates was monitored in the water column of slowly flowing backwaters of the Acheron River during summer. Samples were taken throughout 24 h on two occasions, and densities of fauna were compared with densities in drift samples taken concurrently in the main channel. Drift densities were generally higher than those in backwaters, but not by orders of magnitude. Also, drift densities displayed significant die1 variation, whereas densities in backwaters did not consistently show such a pattern. Species composition generally differed between the two habitats. This brief study demonstrates that benthic invertebrates do swim in the water column of stream backwaters and that they may use this opportunity for colonization.

Bucket dredging to mine and extract gold and tin from rivers is a global industry that has had a range of negative effects on physical environments. These include the destruction of riparian soil profiles and structures, artificial channel straightening and loss of in-stream biodiversity. In this paper we evaluate the immediate effects and long-term consequences of bucket dredging on rivers in Victoria and New South Wales during the period 1900–1950. High quality historical sources on dredge mining are integrated with geospatial datasets, aerial imagery and geomorphological data to analyse the scale of the dredging industry, evidence for disturbance to river channels and floodplains and current land use in dredged areas. The study demonstrates that the environmental impact of dredging was altered but not reduced by anti-pollution regulations intended to control dredging. An assessment of river condition 70–100 years after dredge mining ceased indicates that floodplains and river channels continue to show the effects of dredging, including bank erosion, sediment slugs, compromised habitat and reduced agricultural productivity. These findings have significant implications for river and floodplain management.

Microhabitat use by a stream fish assemblage was examined bimonthly at 51 sites along Armstrong Creek, Victoria, Australia, for 12 months. Five species-river blackfish (Gadopsis marmoratus), short-finned eel (Anguilla australis), short-headed lamprey (Mordacia mordax), and the exotic species brown trout (Salmo trutta) and roach (Rutilus rutilus)-were collected. Because blackfish were abundant, length-frequency data could be used to distinguish three size groups, corresponding approximately to cohorts of Years 0, 1 and 2+. Twenty-seven habitat variables were measured at each site, and these were reduced by principalcomponents analysis to eight major components. Densities of each blackfish size group and of eels, trout and lamprey showed significant correlations with one or more components. The mean preferred water depth of blackfish increased with fish size. Small blackfish could be found in water ranging from 10 to 50 cm deep, but large blackfish were restricted to depths greater than 20 cm and could be found at depths greater than 50 cm. All species showed preferences for water velocities less than 20 cm s-1. There was also a relationship between fish size and the size of shelter available among substratum interstices.

Radio-telemetry was used to monitor movements and burrow usage by O. anatinus living in the Yarra River catchment, about 20 km east-north-east of the central business district of Melbourne, Victoria. The home ranges of six adult or subadult animals were 2.9–7.3 km (mean ± s.d. = 4.6 ± 1.6 km) long, with individuals travelling up to 10.4 km (males) and 4.0 km (females) in a single overnight period. The mean home-range length of adult/subadult animals was significantly greater than that of juveniles (1.4–1.7 km, mean ± s.d. = 1.55 ± 0.2 km, n = 2). The animals utilised two drainage channels as well as 11.8 km of natural waterways, including the Yarra River (5 km), Mullum Mullum Creek (4 km) and Diamond Creek (2.8 km). Several animals travelled repeatedly below one-lane and two-lane bridges, confirming that these structures are not inherent barriers to platypus movement. In total, 57 platypus burrows were described, including 26 along the river, 29 along the creeks and 2 along drains. The horizontal distance from the water’s edge to burrow chambers was 0.4–3.7 m (mean ± s.d. = 1.5 ± 0.9 m, n = 41), with burrows found only in banks extending ≥ 0.5 m above the water. Platypus burrows occurred significantly more often than expected along undercut banks and in association with moderate-to-dense vegetation overhanging the water, and significantly less often at sites where banks had a convex profile at water level. As well, the amount of cover provided along the bank by shrubs/small trees and the ground layer of vegetation was significantly greater than expected at platypus burrows along the river. These attributes are believed to help conceal burrow entrances from predators as well as reduce burrow damage through erosion.

The Australian endemic humicolous and hygropetric water beetle genus Tympanogaster Perkins, 1979, is revised, based on the study of 7,280 specimens. The genus is redescribed, and redescriptions are provided for T. cornuta (Janssens), T. costata (Deane), T. deanei Perkins, T. macrognatha (Lea), T. novicia (Blackburn), T. obcordata (Deane), T. schizolabra (Deane), and T. subcostata (Deane). Lectotypes are designated for Ochthebius labratus Deane, 1933, and Ochthebius macrognathus Lea, 1926. Ochthebius labratus Deane, 1933, is synonymized with Ochthebius novicius Blackburn, 1896. Three new subgenera are described: Hygrotympanogaster new subgenus (type species Tympanogaster (Hygrotympanogaster) maureenae new species; Topotympanogaster new subgenus (type species Tympanogaster (Topotympanogaster) crista new species; and Plesiotympanogaster new genus (type species Tympanogaster (Plesiotympanogaster) thayerae new species. Seventy-six new species are described, and keys to the subgenera, species groups, and species are given. High resolution digital images of all primary types are presented (online version in color), and geographic distributions are mapped. Male genitalia, representative spermathecae and representative mouthparts are illustrated. Scanning electron micrographs of external morphological characters of adults and larvae are presented. Selected morphological features of the other members of the subtribe Meropathina, Meropathus Enderlein and Tympallopatrum Perkins, are illustrated and compared with those of Tympanogaster. Species of Tympanogaster are typically found in the relict rainforest patches in eastern Australia. Most species have very limited distributions, and relict rainforest patches often have more than one endemic species. The only species currently known from the arid center of Australia, T. novicia, has the widest distribution pattern, ranging into eastern rainforest patches. There is a fairly close correspondence between subgenera and microhabitat preferences. Members of Tympanogaster (s. str.) live in the splash zone, usually on stream boulders, or on bedrock stream margins. The majority of T. (Hygrotympanogaster) species live in the hygropetric zone at the margins of waterfalls, or on steep rockfaces where water is continually trickling; a few rare species have been collected from moss in Nothofagus rainforests. Species of T. (Plesiotympanogaster) have been found in both hygropetric microhabitats and in streamside moss. The exact microhabitats of T. (Topotympanogaster) are unknown, but the morphology of most species suggests non-aquatic habits; most specimens have been collected in humicolous microhabitats, by sifting rainforest debris, or were taken in flight intercept traps. Larvae of hygropetric species are often collected with adults. These larvae have tube-like, dorsally positioned, mesothoracic spiracles that allow the larvae to breathe while under a thin film of water. The key morphological differences between larvae of Tympanogaster (s. str.) and those of Tympanogaster (Hygrotympanogaster) are illustrated. New species of Tympanogaster are: T. (s. str.) aldinga (New South Wales, Dorrigo National Park, Rosewood Creek), T. (s. str.) amaroo (New South Wales, Back Creek, downstream of Moffatt Falls), T. (s. str.) ambigua (Queensland, Cairns), T. (Hygrotympanogaster) arcuata (New South Wales, Kara Creek, 13 km NEbyE of Jindabyne), T. (Hygrotympanogaster) atroargenta (Victoria, Possum Hollow falls, West branch Tarwin River, 5.6 km SSW Allambee), T. (Hygrotympanogaster) barronensis (Queensland, Barron Falls, Kuranda), T. (s. str.) bluensis (New South Wales, Blue Mountains), T. (Hygrotympanogaster) bondi (New South Wales, Bondi Heights), T. (Hygrotympanogaster) bryosa (New South Wales, New England National Park), T. (Hygrotympanogaster) buffalo (Victoria, Mount Buffalo National Park), T. (Hygrotympanogaster) canobolas (New South Wales, Mount Canobolas Park), T. (s. str.) cardwellensis (Queensland, Cardwell Range, Goddard Creek), T. (Hygrotympanogaster) cascadensis (New South Wales, Cascades Campsite, on Tuross River), T. (Hygrotympanogaster) clandestina (Victoria, Grampians National Park, Golton Gorge, 7.0 km W Dadswells Bridge), T. (Hygrotympanogaster) clypeata (Victoria, Grampians National Park, Golton Gorge, 7.0 km W Dadswells Bridge), T. (s. str.) cooloogatta (New South Wales, New England National Park, Five Day Creek), T. (Hygrotympanogaster) coopacambra (Victoria, Beehive Falls, ~2 km E of Cann Valley Highway on 'WB Line'), T. (Topotympanogaster) crista (Queensland, Mount Cleveland summit), T. (Hygrotympanogaster) cudgee (New South Wales, New England National Park, 0.8 km S of Pk. Gate), T. (s. str.) cunninghamensis (Queensland, Main Range National Park, Cunningham's Gap, Gap Creek), T. (s. str.) darlingtoni (New South Wales, Barrington Tops), T. (Hygrotympanogaster) decepta (Victoria, Mount Buffalo National Park), T. (s. str.) dingabledinga (New South Wales, Dorrigo National Park, Rosewood Creek, upstream from Coachwood Falls), T. (s. str.) dorrigoensis (New South Wales, Dorrigo National Park, Rosewood Creek, upstream from Coachwood Falls), T. (Topotympanogaster) dorsa (Queensland, Windin Falls, NW Mount Bartle-Frere), T. (Hygrotympanogaster) duobifida (Victoria, 0.25 km E Binns, Hill Junction, adjacent to Jeeralang West Road, 4.0 km S Jeerelang), T. (s. str.) eungella (Queensland, Finch Hatton Gorge), T. (Topotympanogaster) finniganensis (Queensland, Mount Finnigan summit), T. (s. str.) foveova (New South Wales, Border Ranges National Park, Brindle Creek), T. (Hygrotympanogaster) grampians (Victoria, Grampians National Park, Epacris Falls, 2.5 km WNW Halls Gap), T. (Hygrotympanogaster) gushi (New South Wales, Mount Canobolas Park), T. (s. str.) hypipamee (Queensland, Mount Hypipamee National Park, Barron River headwaters below Dinner Falls), T. (s. str.) illawarra (New South Wales, Macquarie Rivulet Falls, near Wollongong), T. (Topotympanogaster) intricata (Queensland, Mossman Bluff Track, 5–10 km W Mossman), T. (s. str.) jaechi (Queensland, Running Creek, along road between Mount Chinghee National Park and Border Ranges National Park), T. (Topotympanogaster) juga (Queensland, Mount Lewis summit), T. kuranda (Queensland, Barron Falls, Kuranda), T. (s. str.) lamingtonensis (Queensland, Lamington National Park, Lightening Creek), T. (s. str.) magarra (New South Wales, Border Ranges National Park, Brindle Creek), T. (Hygrotympanogaster) maureenae (New South Wales, Back Creek, Moffatt Falls, ca. 5 km W New England National Park boundary), T. (Hygrotympanogaster) megamorpha (Victoria, Possum Hollow falls, W br. Tarwin River, 5.6 km SSW Allambee), T. (Hygrotympanogaster) merrijig (Victoria, Merrijig), T. (s. str.) millaamillaa (Queensland, Millaa Millaa), T. modulatrix (Victoria, Talbot Creek at Thomson Valley Road, 4.25 km WSW Beardmore), T. (Topotympanogaster) monteithi (Queensland, Mount Bartle Frere), T. moondarra (New South Wales, Border Ranges National Park, Brindle Creek), T. (s. str.) mysteriosa (Queensland), T. (Hygrotympanogaster) nargun (Victoria, Deadcock Den, on Den of Nargun Creek, Mitchell River National Park), T. (Hygrotympanogaster) newtoni (Victoria, Mount Buffalo National Park), T. (s. str.) ovipennis (New South Wales, Dorrigo National Park, Rosewood Creek, upstream from Coachwood Falls), T. (s. str.) pagetae (New South Wales, Back Creek, downstream of Moffatt Falls), T. (Topotympanogaster) parallela (Queensland, Mossman Bluff Track, 5–10 km W Mossman), T. (s. str.) perpendicula (Queensland, Mossman Bluff Track, 5–10 km W Mossman), T. plana (Queensland, Cape Tribulation), T. (Hygrotympanogaster) porchi (Victoria, Tarra-Bulga National Park, Tarra Valley Road, 1.5 km SE Tarra Falls), T. (s. str.) precariosa (New South Wales, Leycester Creek, 4 km. S of Border Ranges National Park), T. (s. str.) protecta (New South Wales, Leycester Creek, 4 km. S of Border Ranges National Park), T. (Hygrotympanogaster) punctata (Victoria, Mount Buffalo National Park, Eurobin Creek), T. (s. str.) ravenshoensis (Queensland, Ravenshoe State Forest, Charmillan Creek, 12 km SE Ravenshoe), T. (s. str.) robinae (New South Wales, Back Creek, downstream of Moffatt Falls), T. (s. str.) serrata (Queensland, Natural Bridge National Park, Cave Creek), T. (Hygrotympanogaster) spicerensis (Queensland, Spicer’s Peak summit), T. (Hygrotympanogaster) storeyi (Queensland, Windsor Tableland), T. (Topotympanogaster) summa (Queensland, Mount Elliott summit), T. (Hygrotympanogaster) tabula (New South Wales, Mount Canobolas Park), T. (Hygrotympanogaster) tallawarra (New South Wales, Dorrigo National Park, Rosewood Creek, Cedar Falls), T. (s. str.) tenax (New South Wales, Salisbury), T. (Plesiotympanogaster) thayerae (Tasmania, Liffey Forest Reserve at Liffey River), T. (s. str.) tora (Queensland, Palmerston National Park), T. trilineata (New South Wales, Sydney), T. (Hygrotympanogaster) truncata (Queensland, Tambourine Mountain), T. (s. str.) volata (Queensland, Palmerston National Park, Learmouth Creek, ca. 14 km SE Millaa Millaa), T. (Hygrotympanogaster) wahroonga (New South Wales, Wahroonga), T. (s. str.) wattsi (New South Wales, Blicks River near Dundurrabin), T. (s. str.) weiri (New South Wales, Allyn River, Chichester State Forest), T. (s. str.) wooloomgabba (New South Wales, New England National Park, Five Day Creek).

Biological indicators are increasingly being used as integrative measures of ecosystem health in streams, particularly indicators using macroinvertebrate assemblage composition. Several indicators of this type have been advocated, including biotic indices based on taxa sensitivities, richness indices and ratios of observed to expected taxa from models predicting assemblage composition in streams with little human impact (O/E scores). The present study aimed to compare the sensitivity of indicators of each of these types (all used for legislated objectives for stream protection in Victoria, Australia) to a gradient of urban disturbance in 16 streams in a small area in eastern Melbourne. The biotic index SIGNAL and number of Ephemeroptera, Plecoptera or Trichoptera families were the most sensitive indicators, whereas total number of families and O/E scores from Australian river assessment system (AUSRIVAS) models were least sensitive. Differences in sensitivity were not the result of sampling or taxonomic inadequacies. AUSRIVAS and similar models might be improved by using only predictor variables that are not affected by human impacts and by sounder approaches to model selection. Insensitivities of indicators and misclassification of sites by the Victorian objectives show that assessment of indicators against disturbance gradients is critical for setting management objectives based on biological indicators.

The Australian species of the water beetle genus Hydraena Kugelann, 1794, are revised, based on the study of 7,654 specimens. The 29 previously named species are redescribed, and 56 new species are described. The species are placed in 24 species groups. High resolution digital images of all primary types are presented (online version in color), and geographic distributions are mapped. Male genitalia, representative female terminal abdominal segments and representative spermathecae are illustrated. Australian Hydraena are typically found in sandy/gravelly stream margins, often in association with streamside litter; some species are primarily pond dwelling, a few species are humicolous, and one species may be subterranean. The areas of endemicity and species richness coincide quite closely with the Bassian, Torresian, and Timorian biogeographic subregions. Eleven species are shared between the Bassian and Torresian subregions, and twelve are shared between the Torresian and Timorian subregions. Only one species, H. impercepta Zwick, is known to be found in both Australia and Papua New Guinea. One Australian species, H. ambiflagellata, is also known from New Zealand. New species of Hydraena are: H. affirmata (Queensland, Palmerston National Park, Learmouth Creek), H. ambiosina (Queensland, 7 km NE of Tolga), H. antaria (New South Wales, Bruxner Flora Reserve), H. appetita (New South Wales, 14 km W Delagate), H. arcta (Western Australia, Synnot Creek), H. ascensa (Queensland, Rocky Creek, Kennedy Hwy.), H. athertonica (Queensland, Davies Creek), H. australula (Western Australia, Synnot Creek), H. bidefensa (New South Wales, Bruxner Flora Reserve), H. biimpressa (Queensland, 19.5 km ESE Mareeba), H. capacis (New South Wales, Unumgar State Forest, near Grevillia), H. capetribensis (Queensland, Cape Tribulation area), H. converga (Northern Territory, Roderick Creek, Gregory National Park), H. cubista (Western Australia, Mining Camp, Mitchell Plateau), H. cultrata (New South Wales, Bruxner Flora Reserve), H. cunninghamensis (Queensland, Main Range National Park, Cunningham's Gap, Gap Creek), H. darwini (Northern Territory, Darwin), H. deliquesca (Queensland, 5 km E Wallaman Falls), H. disparamera (Queensland, Cape Hillsborough), H. dorrigoensis (New South Wales, Dorrigo National Park, Rosewood Creek, upstream from Coachwood Falls), H. ferethula (Northern Territory, Cooper Creek, 19 km E by S of Mt. Borradaile), H. finniganensis (Queensland, Gap Creek, 5 km ESE Mt. Finnigan), H. forticollis (Western Australia, 4 km W of King Cascade), H. fundaequalis (Victoria, Simpson Creek, 12 km SW Orbost), H. fundata (Queensland, Hann Tableland, 13 km WNW Mareeba), H. hypipamee (Queensland, Mt. Hypipamee National Park, 14 km SW Malanda), H. inancala (Queensland, Girraween National Park, Bald Rock Creek at "Under-ground Creek"), H. innuda (Western Australia, Mitchell Plateau, 16 mi. N Amax Camp), H. intraangulata (Queensland, Leo Creek Mine, McIlwrath Range, E of Coen), H. invicta (New South Wales, Sydney), H. kakadu (Northern Territory, Kakadu National Park, Gubara), H. larsoni (Queensland, Windsor Tablelands), H. latisoror (Queensland, Lamington National Park, stream at head of Moran's Falls), H. luminicollis (Queensland, Lamington National Park, stream at head of Moran's Falls), H. metzeni (Queensland, 15 km NE Mareeba), H. millerorum (Victoria, Traralgon Creek, 0.2 km N 'Hogg Bridge', 5.0 km NNW Balook), H. miniretia (Queensland, Mt. Hypipamee National Park, 14 km SW Malanda), H. mitchellensis (Western Australia, 4 km SbyW Mining Camp, Mitchell Plateau), H. monteithi (Queensland, Thornton Peak, 11 km NE Daintree), H. parciplumea (Northern Territory, McArthur River, 80 km SW of Borroloola), H. porchi (Victoria, Kangaroo Creek on Springhill Rd., 5.8 km E Glenlyon), H. pugillista (Queensland, 7 km N Mt. Spurgeon), H. queenslandica (Queensland, Laceys Creek, 10 km SE El Arish), H. reticuloides (Queensland, 3 km ENE of Mt. Tozer), H. reticulositis (Western Australia, Mining Camp, Mitchell Plateau), H. revelovela (Northern Territory, Kakadu National Park, GungurulLookout), H. spinissima (Queensland, Main Range National Park, Cunningham's Gap, Gap Creek), H. storeyi (Queensland, Cow Bay, N of Daintree River), H. tenuisella (Queensland, 3 km W of Batavia Downs), H. tenuisoror (Australian Capital Territory, Wombat Creek, 6 km NE of Piccadilly Circus), H. textila (Queensland, Laceys Creek, 10 km SE El Arish), H. tridisca (Queensland, Mt. Hemmant), H. triloba (Queensland, Mulgrave River, Goldsborough Road Crossing), H. wattsi (Northern Territory, Holmes Jungle, 11 km NE by E of Darwin), H. weiri (Western Australia, 14 km SbyE Kalumburu Mission), H. zwicki (Queensland, Clacherty Road, via Julatten).

Home-range size and overlap and movement patterns of adult male platypus, Ornithorhynchus anatinus, occupying streams in southern Victoria were investigated near the start of the breeding season using radio-tracking techniques. On the basis of a sample of males monitored for four or more complete activity periods, home-range size varied from 2.9 to 7.0 km, with individuals (n = 4) moving a mean net distance of 2.0 +/- 1.4 km per activity period. Longer-range movements were also observed, with one male travelling at least 15 km from one stream catchment to another via an intervening stretch of river. Some home ranges of males were mutually exclusive whereas others overlapped substantially; in the latter case, males largely avoided each other, spending most of their time in different parts of the shared area. All home ranges of males apparently overlapped those of two or more adult females. Three patterns of travel over complete activity periods were recognised, including unidirectional travel (point A to B), return travel (A to B to A) and multidirectional travel with multiple, relatively short-range backtracking. Males occupying overlapping areas often moved multidirectionally and rarely undertook unidirectional travel, whereas the converse applied to males occupying exclusive areas.

IntroductionI work at a regional campus of La Trobe University, Australia. More precisely, I work at the Bendigo campus of La Trobe University. At Bendigo, we are often annoyed when referred to and addressed as ‘regional’ students and staff. Really, we should not be. After all, Bendigo campus is an outpost of La Trobe’s metropolitan base. It is funded, run, and directed from Bundoora (Melbourne). The word ‘regional’ simply describes the situation. A region is an “administrative division of a city or a district [… or …] a country” (Brown 2528). And the Latin etymology of region (regio, regere) includes “direction, line”, and “rule” (Kidd 208, 589). Just as the Bendigo campus of La Trobe is a satellite of the metropolitan campus, the town of Bendigo is an outpost of Melbourne. So, when we are addressed and interpellated (Althusser 48) as regional, it is a reminder of the ongoing fact that Australia is (still) a colony, an outpost of empire, a country organised on the colonial model. From central administrative hubs, spokes of communication, and transportation spread to the outposts. When Bendigo students and staff are addressed as regional, in a way we are also being addressed as colonial.In this article, the terms ‘region’ and ‘regional’ are deployed as inextricably associated with the Australian version of colonialism. In Australia, in the central metropolitan hubs, where the colonial project is at its most comprehensive, it is hard to see what remains, to see what has escaped that project. The aim of this article is to explore how different aspects of the country escape the totalising project of Australian colonialism. This exploration is undertaken primarily through a discussion of the ways in which some places on this continent remain not regional (and thus, not colonial) how they keep the metropolis at bay, and how they, thus, keep Europe at bay. This discussion includes a general overview of the Australian colonial project, particularly as it pertains to First Nations Peoples, their knowledge and philosophies, and the continent’s unique ecologies. Then the article becomes more speculative, imagining different ways of seeing and experiencing time and place in this country, ways of seeing the remains and refuges of pre-1788, not-regional, and not-colonial Australia. In these remains and refuges, there persist the flourishing and radical difference of this continent’s ecologies and, not surprisingly, the radical suitedness of tens of thousands of years of First Nations Peoples’ culture and thinking to that ecology, as Country. In what remains not regional, I argue, are answers to the question: How will we live here in the Anthropocene?A Totalising ProjectSince 1788, in the face of the ongoing presence and resistance of First Nations cultures, and the continent’s radically unique ecologies, the Australian colonial project has been to convert the continent into a region of Europe. As such, the imposed political, administrative, scientific, and economic institutions are largely European. This is also so, to a lesser extent, of social and cultural institutions. While the continent is not Europe geologically, the notion of the Anthropocene suggests that this is changing (Crutzen and Stoermer). This article does not resummarise the vast body of scholarship on the effects of colonisation, from genocide to missionary charity, to the creation of bureaucratic and comprador classes, and so on. Suffice to say that the different valences of colonisation—from outright malevolence to misguided benevolence–produce similar and common effects. As such, what we experience in metropolitan and regional Australia, is chillingly similar to what people experience in London. Chilling, because this experience demonstrates how the effects of the project tend towards the total.To clarify, when I use the name ‘Australia’ I understand it as the continent’s European name. When I use the term ‘Europe’ or ‘European’, I refer to both the European continent and to the reach and scope of the various colonial and imperial projects of European nations. I take this approach because I think it is necessary to recognise their global effects and loads. In Australia, this load has been evident and present for more than two centuries. On one hand, it is evident in the social, cultural, and political institutions that come with colonisation. On another, it is evident in the environmental impacts of colonisation: impacts that are severely compounded in Australia. In relation to this, there is vital, ongoing scholarship that explores the fact that, ecologically, Australia is a radically different place, and which discusses the ways in which European scientific, aesthetic, and agricultural assumptions, and the associated naturalised and generic understandings of ‘nature’, have grounded activities that have radically transformed the continent’s biosphere. To name but a few, Tim Flannery (Eaters, “Ecosystems”) and Stephen Pyne, respectively, examine the radical difference of this continent’s ecology, geology, climate, and fire regimes. Sylvia Hallam, Bill Gammage, and Bruce Pascoe (“Bolt”, Emu) explore the relationships of First Nations Peoples with that ecology, climate, and fire before 1788, and the European blindness to the complexity of these relationships. For instance, William Lines quotes the strikingly contradictory observations of the colonial surveyor, Thomas Mitchell, where the land is simultaneously “populous” and “without inhabitants” and “ready for the immediate reception of civilised man” and European pastoralism (Mitchell qtd. in Lines 71). Flannery (Eaters) and Tim Low (Feral, New) discuss the impacts of introduced agricultural practices, exotic animals, and plants. Tom Griffiths tells the story of ‘Improving’ and ‘Acclimatisation Societies’, whose explicit aims were to convert Australian lands into European lands (32–48). The notion of ‘keeping Europe at bay’ is a response to the colonial assumptions, practices, and impositions highlighted by these writers.The project of converting this continent and hundreds of First Nations Countries into a region of Europe, ‘Australia’, is, in ambition, a totalising one. From the strange flag-plantings, invocations and incantations claiming ownership and dominion, to legalistic conceptions such as terra nullius, the aim has been to speak, to declare, to interpellate the country as European. What is not European, must be made European. What cannot be made European is either (un)seen in a way which diminishes or denies its existence, or must be made not to exist. These are difficult things to do: to not see, to unsee, or to eradicate.One of the first acts of administrative division (direction and rule) in the Port Phillip colony (now known as Victoria) was that of designating four regional Aboriginal Protectorates. Edward Stone Parker was appointed Assistant Protector of Aborigines for the Loddon District, a district which persists today for many state and local government instrumentalities as the Loddon-Mallee region. In the 1840s, Parker experienced the difficulty described above, in attempting to ‘make European’ the Dja Dja Wurrung people. As part of Parker’s goal of Christianising Dja Dja Wurrung people, he sought to learn their language. Bain Attwood records his frustration:[Parker] remarked in July 1842. ‘For physical objects and their attributes, the language readily supplies equivalent terms, but for the metaphysical, so far I have been able to discover scarcely any’. A few years later Parker simply despaired that this work of translation could be undertaken. ‘What can be done’, he complained, ‘with a people whose language knows no such terms as holiness, justice, righteousness, sin, guilt, repentance, redemption, pardon, peace, and c., and to whose minds the ideas conveyed by those words are utterly foreign and inexplicable?’ (Attwood 125)The assumption here is that values and concepts that are ‘untranslatable’ into European understandings mark an absence of such value and concept. Such assumptions are evident in attempts to convince, cajole, or coerce First Nations Peoples into abandoning traditional cultural and custodial relationships with Country in favour of individual private property ownership. The desire to maintain relationships with Country are described by conservative political figures such as Tony Abbott as “lifestyle choices” (Medhora), effectively declaring them non-existent. In addition, processes designed to recognise First Nations relationships to Country are procedurally frustrated. Examples of this are the bizarre decisions made in 2018 and 2019 by Nigel Scullion, the then Indigenous Affairs Minister, to fund objections to land claims from funds designated to alleviate Indigenous disadvantage and to refuse to grant land rights claims even when procedural obstacles have been cleared (Allam). In Australia, given that First Nations social, cultural, and political life is seamlessly interwoven with the environment, ecology, the land–Country, and that the colonial project has always been, and still is, a totalising one, it is a project which aims to sever the connections to place of First Nations Peoples. Concomitantly, when the connections cannot be severed, the people must be either converted, dismissed, or erased.This project, no matter how brutal and relentless, however, has not achieved totality.What Remains Not Regional? If colonisation is a totalising project, and regional Australia stands as evidence of this project’s ongoing push, then what remains not regional, or untouched by the colonial? What escapes the administrative, the institutional, the ecological, the incantatory, and the interpellative reach of the regional? I think that despite this reach, there are such remains. The frustration, the anger, and antipathy of Parker, Abbott, and Scullion bear this out. Their project is unfinished and the resistance to it infuriates. I think that, in Australia, the different ways in which pre-1788 modes of life persist are modes of life which can be said to be ‘keeping Europe at bay’.In Reports from a Wild Country: Ethics for Decolonisation, Deborah Bird Rose compares Western/European conceptualisations of time, with those of the people living in the communities around the Victoria River in the Northern Territory. Rose describes Western constructions of time as characterised by disjunction (for example, the ‘birth’ of philosophy, the beginnings of Christianity) and by irreversible sequence (for example, concepts of telos, apocalypse, and progress). These constructions have become so naturalised as to carry a “seemingly commonsensical orientation toward the future” (15). Orientation, in an Australian society “built on destruction, enables regimes of violence to continue their work while claiming the moral ground of making a better future” (15). Such an orientation “enables us to turn our backs on the current social facts of pain, damage, destruction and despair which exist in the present, but which we will only acknowledge as our past” (17).In contrast to this ‘future vision’, Rose describes what she calls the ‘canonical’ time-space conceptualisation of the Victoria River people (55). Here, rather than a temporal extension into an empty future, orientation is towards living, peopled, and grounded origins, with the emphasis on the plural, rather than a single point of origin or disjunction:We here now, meaning we here in a shared present, are distinct from the people of the early days by the fact that they preceded us and made our lives possible. We are the ‘behind mob’—those who come after. The future is the domain of those who come after us. They are referred to as […] those ‘behind us’. (55)By way of illustration, when we walk into a sheep paddock, even if we are going somewhere (even the future), we are also irrevocably walking behind ancestors, predecessor ecologies, previous effects. The paddock, is how it is, after about 65,000 years of occupation, custodianship, and management, after European surveyors, squatters, frontier conflict and violence, the radical transformation of the country, the destruction of the systems that came before. Everything there, as Freya Mathews would put it, is of “the given” (“Becoming” 254, “Old” 127). We are coming up behind. That paddock is the past and present, and what happens next is irrevocably shaped by it. We cannot walk away from it.What remains not regional is there in front of us. Country, language, and knowledge remain in the sheep paddock, coexisting with everyone and everything else that everyone in this country follows (including the colonial and the regional). It is not gone. We have to learn how to see it.By the Fox or the Little EagleFigure 1: A Scatter of Sulphur-Crested Cockatoo Feathers at Wehla. Image Credit: Terry Eyssens.As a way of elaborating on this, I will tell you about a small, eight hectare, patch of land in Dja Dja Wurrung Country. Depending on the day, or the season, or your reason, it could take fifteen minutes to walk from one end to the other or it might take four hours, from the time you start walking, to the time when you get back to where you started. At this place, I found a scatter of White Cockatoo feathers (Sulphur-Crested Cockatoo—Cacatua galerita). There was no body, just the feathers, but it was clear that the Cockatoo had died, had been caught by something, for food. The scatter was beautiful. The feathers, their sulphur highlights, were lying on yellow-brown, creamy, dry grass. I dwelled on the scatter. I looked. I looked around. I walked around. I scanned the horizon and squinted at the sky. And I wondered, what happened.This small patch of land in Dja Dja Wurrung Country is in an area now known as Wehla. In the Dja Dja Wurrung and many other Victorian languages, ‘Wehla’ (and variants of this word) is a name for the Brushtail Possum (Trichosurus vulpecula). In the time I spend there/here, I see all kinds of animals. Of these, two are particularly involved in this story. One is the Fox (Vulpes vulpes), which I usually see just the back of, going away. They are never surprised. They know, or seem to know, where everyone is. They have a trot, a purposeful, cocky trot, whether they are going away because of me or whether they are going somewhere for their own good reasons. Another animal I see often is the Little Eagle (Hieraaetus morphnoides). It is a half to two-thirds the size of a Wedge-tailed Eagle (Aquila audax). It soars impressively. Sometimes I mistake a Little Eagle for a Wedge-tail, until I get a better look and realise that it is not quite that big. I am not sure where the Little Eagle’s nest is but it must be close by.I wondered about this scatter of White Cockatoo feathers. I wondered, was the scatter of White Cockatoo feathers by the Fox or by the Little Eagle? This could be just a cute thought experiment. But I think the question matters because it provokes thinking about what is regional and what remains not regional. The Fox is absolutely imperial. It is introduced and widespread. Low describes it as among Australia’s “greatest agent[s] of extinction” (124). It is part of the colonisation of this place, down to this small patch of land in Dja Dja Wurrung Country. Where the Fox is, colonisation, and everything that goes with it, remains, and maintains. So, that scatter of feathers could be a colonial, regional happening. Or maybe it is something that remains not regional, not colonial. Maybe the scatter is something that escapes the regional. The Little Eagles and the Cockatoos, who were here before colonisation, and their dance (a dance of death for the Cockatoo, a dance of life for the Little Eagle), is maybe something that remains not regional.But, so what if the scatter of White Cockatoo feathers, this few square metres of wind-blown matter, is not regional? Well, if it is ‘not regional’, then, if Australia is to become something other than a colony, we have to look for these things that are not regional, that are not colonial, that are not imperial. Maybe if we start with a scatter of White Cockatoo feathers that was by the Little Eagle, and then build outwards again, we might start to notice more things that are not regional, that still somehow escape. For example, the persistence of First Nations modes of land custodianship and First Nations understandings of time. Then, taking care not to fetishise First Nations philosophies and cultures, take the time and care to recognise the associations of all of those things with simply, the places themselves, like a patch of land in Dja Dja Wurrung Country, which is now known as Wehla. Instead of understanding that place as something that is just part of the former Aboriginal Protectorate of Loddon or of the Loddon Mallee region of Victoria, it is Wehla.The beginning of decolonisation is deregionalisation. Every time we recognise the not regional (which is hopefully, eventually, articulated in a more positive sense than ‘not regional’), and just say something like ‘Wehla’, we can start to keep Europe at bay. Europe’s done enough.seeing and SeeingChina Miéville’s The City and The City (2009) is set in a place, in which the citizens of two cities live. The cities, Besźel and Ul Qoma, occupy the same space, are culturally and politically different. Their relationship to each other is similar to that of border-sharing Cold War states. Citizens of the two cities are forbidden to interact with each other. This prohibition is radically policed. Even though the citizens of Besźel and Ul Qoma live in adjoining buildings, share roads, and walk the same streets, they are forbidden to see each other. The populations of each city grow up learning how to see what is permitted and to not see, or unsee, the forbidden other (14).I think that seeing a scatter of White Cockatoo feathers and wondering if it was by the Fox or by the Little Eagle is akin to the different practices of seeing and not seeing in Besźel and Ul Qoma. The scatter of feathers is regional and colonial and, equally, it is not. Two countries occupy the same space. Australia and a continent with its hundreds of Countries. What remains not regional is what is given and Seen as such. Understanding ourselves as walking behind everything that has gone before us enables this. As such, it is possible to see the scatter of White Cockatoo feathers as by the Fox, as happening in ‘regional Australia’, as thus characterised by around 200 years of carnage, where the success of one species comes at the expense of countless others. On the other hand, it is possible to See the feathers as by the Little Eagles, and as happening on a small patch of land in Dja Dja Wurrung Country, as a dance that has been happening for hundreds of thousands, if not millions, of years. It is a way of keeping Europe at bay.I think these Cockatoo feathers are a form of address. They are capable of interpellating something other than the regional, the colonial, and the imperial. A story of feathers, Foxes, and Little Eagles can remind us of our ‘behindness’, and evoke, and invoke, and exemplify ways of seeing and engaging with where we live that are tens of thousands of years old. This is both an act of the imagination and a practice of Seeing what is really there. 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