Lake Chisholm, a polyhumic forest lake in Tasmania

Bowling, Lee C.; Tyler, P.A.

doi:10.1007/978-94-009-3097-1_5

Cited by 8 publications

(5 citation statements)

References 25 publications

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“…Though not meromictic it is a case of a polyhumic lake in which an extended period of stratification leads to a stable physicochemical interface akin to the chemocline of a meromictic lake (Bowling & Tyler, 1988), and it displays some of the microbial properties of our meromictic lakes. The biota has not been investigated in detail, but close interval sampling, of the type which revealed microbial zonations in meromictic lakes (Croome & Tyler, 1984a), carried out on 6.2.1986 revealed an abrupt microbial transition across the oxycline.…”

Section: Resultsmentioning

confidence: 99%

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Phyloflagellates and their ecology in Tasmanian polyhumic lakes

Croome

Tyler

1988

Hydrobiologia

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Tasmania has many polyhumic lakes with a wealth of phytoflagellates, especially chromophytes. Dystrophic coastal lagoons, such as Lake Garcia, are rich habitats of the Chrysophyta and Dinophyta, containing a number of new or rare species. In meromictic Lake Fidler and Sulphide Pool flagellates and prokaryotes are permanently zoned in a finely structured array astride the redoxcline. In the mixolimnetic waters phytoflagellates are zoned and probably perform regular migrations. Chaoborus larvae migrate daily. In monomictic, polyhumic Lake Chisholm there is probably a permanent zonation of flagellates and prokaryotes about the long-lasting thermocline, with diel migrations of other species in the epilimnion. With its numerous new or rare species Tasmania is a phytoflagellate haven.

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Section: Resultsmentioning

confidence: 99%

“…Physico-chemical parameters were investigated by the methods of Bowling & Tyler (1988). Plankton samples for studies of zonation or migration were taken with a pneumatically-operated syringe sampler (Baker et al, 1985a;Croome & Tyler, 1984a) or with a funnel sampler (Parker et al, 1968) and peristaltic pump.…”

Section: Methodsmentioning

confidence: 99%

Phyloflagellates and their ecology in Tasmanian polyhumic lakes

Croome

Tyler

1988

Hydrobiologia

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“…Most of the knowledge on phytoplankton of humic systems is restricted to stratified and deep temperate lakes. In these environments, phytoplankton communities include, in general, few species of phytoflagellates, which can optimise their access to light and nutrients by vertical migration (Bowling & Tyler 1988). Phytoplankton of the Comprida Lagoon was composed of some flagellates, but also contained eukaryote and prokaryote picoplankton, filamentous cyanobacterias and some metaphytic diatoms.…”

Section: Feb-96mentioning

confidence: 99%

Phytoplankton composition and functional groups in a tropical humic coastal lagoon, Brazil

2006

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RESUMO -(Composição e grupos funcionais do fitoplâncton de uma lagoa costeira tropical húmica, Brasil). Este trabalho apresenta a composição e os grupos funcionais do fitoplâncton da lagoa Comprida, uma lagoa costeira tropical húmica localizada no sudeste brasileiro. Foi registrado um total de 28 táxons distribuídos em oito divisões taxonômicas: 26% Heterokontophyta, 21% Chlorophyta, 21% Cyanophyta, 14% Bacillariophyta, 14% Cryptophyta e 4% Prymnesiophyta. Vinte e três táxons foram identificados em nível específico e intraespecíficos, dos quais quatro constituem novos registros para o Brasil e dois para o estado do Rio de Janeiro. O fitoplâncton da lagoa Comprida esteve constituído por alguns flagelados, mas também por organismos picoplanctônicos eucariontes e procariontes, cianobactérias filamentosas e algumas diatomáceas. A biomassa foi menor que a comumente encontrada em outros sistemas lacustres e mostrou uma notável variabilidade temporal. Em relação aos grupos funcionais, as populações foram agrupadas em oito grupos: Q, Z, E, N, X 3 , X 2 , S 1 e Y, muitos dos quais típicos de sistemas oligo ou mesotróficos, tolerantes a baixas concentrações de nutrientes e sensíveis a baixos valores de pH.Palavras-chave: fitoplâncton, trópicos, sistemas húmicos, lagoas costeiras, grupos funcionais, sudeste do Brasil ABSTRACT -(Phytoplankton composition and functional groups in a tropical humic coastal lagoon, Brazil). This paper presents the composition and functional groups of the phytoplankton from Comprida lagoon, a tropical humic coastal Lagoon located in Southeast Brazil. A total of 28 taxa was found, distributed in eight taxonomic divisions as follows: 26% Heterokontophyta, 21% Chlorophyta, 21% Cyanophyta, 14% Bacillariophyta, 14% Cryptophyta, and 4% Prymnesiophyta. Twenty-three taxa were identified at the specific and infraspecific levels, from which four are new records for Brazil and two for Rio de Janeiro State. Phytoplankton of the Comprida lagoon was comprised of several flagellates, but also eukaryote and prokaryote picoplankton, filamentous cyanobacteria and several diatoms. The biomass was lower than that found in other lacustrine systems, and showed remarkable temporal variability. According to the functional-group approach, the populations formed eight groups: Q, Z, E, N, X 3 , X 2 , S 1 and Y, most typical of oligo-or mesotrophic systems, tolerant to nutrient deficiency and sensitive to increased pH.

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“…Mobile organisms in the plankton of lakes have the potential to counteract the distribution imposed on other organisms by the turbulent mixing which inevitably occurs in natural waters. In lakes with minimal turbulence even small flagellates can offset permanent settlement and may also regulate with great precision their position in the water column, in response to steep vertical gradients of environmental factors (Bowling & Tyler, 1988;Croome & Tyler, 1988). At a different scale, flagellate motility can produce horizontal distributions which differ from those of non-motile species, and this-has implications for the design of appropriate field sampling strategies (Kuosa, 1988).…”

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confidence: 99%