The Biogeography of Cladocera (Crustacea) in Tropical Australia

Timms, Brian V.

doi:10.1002/iroh.19880730309

Cited by 9 publications

(4 citation statements)

References 14 publications

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“…The range in cladoceran sizes we have observed in tropical, temperate, subarctic, and arctic regions in the Western Hemisphere is also consistent with studies that describe the zooplankton found in these climatic zones on other continents, including Australia, Asia, Europe, India, and Greenland (Fernando 1980;Dussart et al 1984;Fernando et al 1987;Hrbácek 1987;Timms 1988). Moreover, the size pattern across latitudes whereby cladoceran species increase in size toward temperate regions is consistent with size patterns observed within individual species of zooplankton across latitudes.…”

Section: Resultssupporting

confidence: 90%

Latitudinal patterns in the size distribution and seasonal dynamics of new world, freshwater cladocerans

Gillooly

Dodson

2000

Limnology & Oceanography

191

157

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Analysis of zooplankton communities in over 1,100 water bodies spanning the Western Hemisphere (77ЊS, 81ЊN latitude) revealed latitudinal patterns in cladoceran body size and Daphnia seasonal dynamics. The mean body length of cladoceran species occurring at different latitudinal intervals was greatest in north temperate regions, declining in size toward the poles and equator. Thus, mean cladoceran size was greatest in regions where the mean annual surface temperatures of lakes ranged from 6 to 8ЊC in both the Northern and Southern Hemispheres. The date of maximum Daphnia abundance and the period of minimum Daphnia abundance in lakes of North America was positively, linearly related to the latitudinal position of the lakes. The date of maximum abundance increased with latitude such that Daphnia peaked during nearly all months of the year depending on latitude, but usually within the same, narrow temperature range (15-20ЊC). The period of minimum Daphnia abundance decreased linearly with latitude such that abundance generally was minimal when water temperatures exceeded 20ЊC.

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Section: Resultssupporting

confidence: 90%

Latitudinal patterns in the size distribution and seasonal dynamics of new world, freshwater cladocerans

Gillooly

Dodson

2000

Limnology & Oceanography

191

157

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“…The major cause of (Smirnov and Timms, 1983;Timms, 1988;Frey, 1991) were recorded from Western Australia for the first time. In many cases the range extensions have considerable conservation significance; for example, Celsinotum hypsilophum was previously Table 4 Undescribed species of aquatic invertebrate collected to date only from wetlands of the southern Carnarvon Basin in 1994 and 1995. differences in species lists between seasons appeared to be the high proportion of taxa collected infrequently.…”

Section: Aquatic Invertebratesmentioning

confidence: 99%

Aquatic invertebrates and waterbirds of wetlands and rivers of the southern Carnarvon Basin, Western Australia

Halse¹,

Shiel²,

Storey³

et al. 2000

Rec West Aust Mus Sup

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-Fifty-six sites, representing 53 wetlands, were surveyed in the southern Carnarvon Basin in 1994 and 1995 with the aim of documenting the waterbird and aquatic invertebrate fauna of the region. Most sites were surveyed in both winter and summer, although some contained water only one occasion. Altogether 57 waterbird species were recorded, with 29 292 waterbirds of 25 species on Lake MacLeod in October 1994. River pools were shown to be relatively important for waterbirds, while many freshwater claypans were little used.At least 492 species of aquatic invertebrate were collected. The invertebrate fauna was characterized by the low frequency with which taxa occurred: a third of the species were collected at a single site on only one occasion. Patterns of occurrence were not strongly seasonal. Many undescribed species were found and many range extensions were. recorded, reflecting lack of previous aquatic invertebrate work in the region. The level of regional endemicity could not be assessed adequately, although it is probably comparatively low. In terms of their invertebrate fauna, five types of wetlands were distinguished: river pools, rock pools and larger flowing streams; seeps, springs and smaller creeks; freshwater claypans; birridas; and Lake MacLeod. Environmental factors to which invertebrates appeared to respond were ratio of calcium/ alkalinity, total dissolved solids, turbidity, colour, flow, longitude and nutrients, although some factors were inter-correlated.Additional surveys should find extra species of waterbird and, more particularly, aquatic invertebrate using wetlands of the southern Carnarvon Basin. For many invertebrates, occurrences are too sparse for effective protection of species within a nature reserve system and other mechanisms will be required to ensure their conservation. Comparison of site classifications based on waterbird, aquatic invertebrate and plant data showed patterns among sites identified using one element of the biota did not reflect patterns shown by other elements. This suggests that, until further work has identified an element that reflects the whole wetland community, as many biotic elements as possible should be surveyed.

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“…Momentary species composition also appears to be higher in these samples than reported from the tropics by Timms & Morton (1988) Koste et al, 1988Koste et al, 1988 of tropical collections made by one of us (RJS). Without distinguishing between littoral and limnetic cladocerans, Timms (1988), in a review of the biogeography of Cladocera in tropical Australia, concludes that although species richness varies widely throughout the region considered, 'in general there is a decrease from north to south'. At present, it seems likely that temperate waters are equally or more diverse in littoral cladocerans than are tropical waters of Australia, but further work is required to confirm this.…”

Section: Macrophytesmentioning

confidence: 99%

Species richness in tropical fresh waters of Australia

Shiel

Williams

1990

Hydrobiologia

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General ecological expectations about the relationship between latitude and species richness are that at low latitudes (the tropics) species richness is greater than at higher latitudes (temperate and polar regions). Recent work suggests that this may not be the case for several habitat types and biological groups in Australia. Results are conflicting: on present evidence (admittedly sparse) it appears that in Australian tropical fresh waters species richness is generally depressed in zooplankton and littoral microfaunal communities, but not in macroinvertebrate communities in typical streams and in fish communities (and perhaps also in amphibian and reptile communities).The situation is indeterminate for tropical phytoplankton and macrophyte communities.

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The Biogeography of Cladocera (Crustacea) in Tropical Australia

Cited by 9 publications

References 14 publications

Latitudinal patterns in the size distribution and seasonal dynamics of new world, freshwater cladocerans

Latitudinal patterns in the size distribution and seasonal dynamics of new world, freshwater cladocerans

Aquatic invertebrates and waterbirds of wetlands and rivers of the southern Carnarvon Basin, Western Australia

Species richness in tropical fresh waters of Australia

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