New Zealand lakes research, 1967–91

Burns, Carolyn W.

doi:10.1080/00288330.1991.9516491

Cited by 18 publications

(16 citation statements)

References 127 publications

(98 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Copepods are an important component of freshwater plankton communities, and in NZ they often dominate zooplankton communities numerically (Burns, 1991). Crustacean zooplankton communities in NZ are characterised by low species diversity and exhibit very little predictable seasonality in total abundance, or the relative importance of major groups (Burns, 1991).…”

Section: Discussionmentioning

confidence: 99%

Seasonal Variation in Plankton Community Responses of Mesocosms Dosed with Pentachlorophenol

2004

View full text Add to dashboard Cite

Seasonal variations in plankton community response to pentachlorophenol (PCP) were studied in four mesocosm experiments using enclosures in a small lake. The mesocosms (860 l) were dosed with single applications of technical grade PCP (0, 4, 10, 24, 36, 54, 81 and 121 microg/l PCP) and monitored for 20 days. Multivariate statistical analyses showed that plankton community taxonomic composition varied with season. In winter and spring, communities were most stable in time; species diversity and abundance were lowest in winter. Seasonally, the communities varied little with respect to the dominant species, which were the copepod Calamoecia lucasi, the alga Peridinium sp. and the rotifer Ascomorpha ovalis. The direct effects of the PCP additions varied little between seasons, but indirect effects were evident at lower treatment levels in autumn. Indirect effects were not evident in winter. Minor variations in plankton community responses to PCP with season were apparent in the following order of decreasing sensitivity; autumn > or = winter/spring > or = summer. At the species level, C. lucasi showed the largest response. The responses observed were greatest in autumn, with decreased abundance at PCP concentrations > or = 24 microg/l. In the other seasons, effects were observed at levels of 54 or 81 microg/l and higher. Ascomorpha ovalis was the most responding rotifer in winter and spring, whereas Anuraeopsis fissa responded more strongly in autumn and summer. The dinoflagellate alga Peridinium sp. had the largest negative response in all but winter, when Dinobryon cylindricum did. Cryptomonas sp. responded positively to PCP in all seasons, increasing in abundance in the highest treatments, possibly due to reduced grazing pressure, reduced competition, or increased decomposition. The plankton community no-observed effect-concentration (NOEC) was 24-36 microg/l PCP. Results reported here suggest that the Australian and New Zealand water quality guideline values for PCP are sufficient to protect plankton communities against adverse effects.

show abstract

Section: Discussionmentioning

confidence: 99%

Seasonal Variation in Plankton Community Responses of Mesocosms Dosed with Pentachlorophenol

2004

View full text Add to dashboard Cite

show abstract

“…Both phosphorus and nitrogen have been put forward as limiting factors for phytoplankton growth (Schindler 1978, Burns 1991, Soto & Campos 1995. Nutrient input to a lake depends on external contributions from its drainage basin through rain water and land use (agriculture, forestry, urban, industrial etc.…”

Section: Discussionmentioning

confidence: 99%

A study of the river basins and limnology of five humic lakes on Chiloé Island

Villalobos

Parra²

2003

Rev. chil. hist. nat.

View full text Add to dashboard Cite

From November 1996 to October 1997, the river basins of five humic lakes on Chiloé Island were studied monthly: Lakes Natri, Tepuhueico, Tarahuín, Huillinco and Cucao. The objective of this study was to know the catchment area, river basin and the main physical, chemical and biological characteristics of these humic lakes. The trophic status, the actual loading, and the mass balances of phosphorus and nitrogen were determined in relation to anthropogenic activities. Lakes Cucao and Huillinco were characterized by a marine influence. All the lakes had brown coloured waters, caused by humic substances, which limit their transparency. Lake Natri was the deepest (58 m), whereas Lake Tepuhueico had the shallowest depth (25 m). Total phosphorus and nitrogen fluctuated between 23.5 and 35 µg L -1 and 197 and 380 µg L -1 (annual average) in lakes Natri, Tepuhueico and Tarahuín, respectively. Lakes Cucao and Huillinco showed extremely high concentrations of total nitrogen (annual average => 3,000 µg L -1 ) and total phosphorus (= 223 and 497 µg L -1 ), and were classified as hyper-eutrophic. Lake Tarahuín registered the greatest diversity of phytoplankton, with 55 species, including Ceratium hirundinella which also occurred in lakes Cucao and Tarahuín. The diversity of the zooplankton community varied across these lakes. The presence of Diaptomus diabolicus (Tumeodiaptomus d. Dussart 1979) (Cucao, Huillinco and Tepuhueico) is noteworthy since this extends its geographical distribution to the south.Key words: river basin, limnological characterization, humic lakes, Chiloé, southern Chile. RESUMENDurante noviembre de 1996 y octubre de 1997 mensualmente se estudió la cuenca de cinco lagos húmicos localizados en la Isla de Chiloé: Lagos Natri, Tepuhueico, Tarahuín, Huillinco y Cucao. El estudio tuvo como objetivo conocer el área de la cuenca, la cuenca hidrográfica y las principales características físicas, químicas y biológicas de estos lagos húmicos. Se determinó el estado trófico, como también la carga actual y el balance másico de fósforo y nitrógeno total, en relación a actividades antrópicas. Los lagos Cucao y Huillinco se caracterizaron por presentar influencia marina. Todos los lagos tienen aguas de color marrón, causadas por las sustancias húmicas, que limitan la transparencia. El lago Natri es el más profundo (58 m), mientras que el Tepuhueico presentó la menor profundidad (25 m). Concentraciones de fósforo y nitrógeno total fluctuaron entre 23,5 y 35 µg L -1 y 197 y 380 µg L -1 en los lagos Natri, Tepuhueico y Tarahuín. Mientras que los lagos Cucao y Huillinco mostraron para el nitrógeno y fósforo concentraciones extremadamente altas, para el nitrógeno total (promedio anual > 3.000 µg L -1 ) y para el fósforo (223 y 496 µg L -1 ) clasificándolos como hipereutróficos. El lago Tarahuín registró la mayor diversidad fitoplanctónica con 55 especies. En los lagos Cucao y Tarahuín, destaca la presencia de Ceratium hirundinella. La comunidad zooplanctónica mostró diferencias en la diversidades de especies en los l...

show abstract

“…There are few invertebrate predators present in the plankton of New Zealand lakes; not only are predatory cladocerans absent, as they are from Australia, but so too are the predatory larvae of the dipteran family Chaoboridae (Burns 1991).…”

Section: New Zealandmentioning

confidence: 99%

“…There are no obligate planktivorous fish in New Zealand and only three relatively widely distributed, facultative planktivores: Retropinna retropinna, Gobiomorphus cotidianus and Galaxias brevipinnis (Burns 1991). All three of these species prey on the zooplankton in Lake Taupo (Table 2) (Stephens 1983), the largest lake in New Zealand.…”

Section: New Zealandmentioning

confidence: 99%

Distinctive aspects of the zooplankton of large lakes in Australasia, Antarctica and South America

Bayly¹

1995

Mar. Freshwater Res.

View full text Add to dashboard Cite

Not only has the degree of species-level cosmopolitanism amongst zooplanktonic organisms been considerably overestimated, but differences between the different classical biogeographic regions (established from terrestrial studies) occur at supra-specific levels as high as family or even suborder. The Centropagidae, and particularly the genus Boeckella, are found in New Zealand, most of Australia, southern and high altitude regions of South America, and around the periphery of Antarctica. The biogeography and ecology of this family is discussed in detail. Most predaceous families of Cladocera are entirely absent from the Australian and Neotropical regions. The genus Daphniopsis occurs in salt lakes in Australia and South America and in freshwater lakes in Antarctica. In southern Australia numerous species of ostracod have colonized the limnetic region of salt lakes, and the largest of these prey on species of Calamoecia, Daphniopsis and small ostracods. Chaoboridae are absent from New Zealand as, too, are obligate planktivorous fish. The Chilean flamingo, Phoenicopterus chilensis, and Wilson's phalarope, Phalaropus tricolor, are significant predators on Boeckella poopoensis in salt lakes on the Andean Altiplano and elsewhere in South America.

show abstract

New Zealand lakes research, 1967–91

Cited by 18 publications

References 127 publications

Seasonal Variation in Plankton Community Responses of Mesocosms Dosed with Pentachlorophenol

Seasonal Variation in Plankton Community Responses of Mesocosms Dosed with Pentachlorophenol

A study of the river basins and limnology of five humic lakes on Chiloé Island

Distinctive aspects of the zooplankton of large lakes in Australasia, Antarctica and South America

Contact Info

Product

Resources

About