Additions to the check list of freshwater algae in New Zealand—II

Chapman, V. J.

doi:10.1080/03036758.1975.10421852

Cited by 15 publications

(14 citation statements)

References 30 publications

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“…Table 1 summarises the occurrence of the algae found in the Waikato River in this study. Although the present list is not exhaustive it agrees with those of previous workers (Hill unpublished 1969(Hill unpublished , 1975Chapman et al 1957;Dr E. A. Flint, Ecology Division, DSIR, pers.…”

Section: Introductionsupporting

confidence: 90%

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Phytoplankton in six hydroelectric lakes on the Waikato River, New Zealand, 1970–72

Magadza

1978

New Zealand Journal of Marine and Freshwater Research

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Phytoplankton were studied in six lakes (Aratiatia, Ohakuri, Atiamuri, Whakamaru, Waipapa, and Karapiro) on the Waikato River, New Zealand, 1970-72. The standing crop of phytoplankton showed a progressive increase as the Waikato River flowed northwards from Lake Taupo through eight dams to Lake Karapiro. Ths dominant algal species was Melosira distans (Ehrenb.) Kütz, with M. granulata var. angustissima O. Müll, and Asterionella formosa Hass. as the subdqminants. The increase in standing crop of the phytoplankton was associated with increase in the nitrogen and phosphorus loading on the river. The role of M. distans, M. granulata var. angustissima, and Asterionella formosa as indicators of trophic status of lakes is discussed. Application of the Shannon-Weaver index of diversity showed that the index was very sensitive to changes in the relative abundance of M. distans and M. granulata var. angustissima, but was insensitive to changes in the relative abundance of the rest of the phytoplankton species. The analysis of trend showed a tendency for the algal standing crop to increase during the study period. This trend was most noticeable in those lakes with high nutrient inputs. A comparison of the chlorophyll standing crop value found in Lake Ohakuri to previously reported values confirmed this trend and showed that there had been a recent change in the algal species composition of the lake. METHODS Six of the eight hydroelectric lakes on the Waikato River were selected for this study: in order from Lake Taupo, these were: Aratiatia, Ohakuri, Atiamuri, Wakamaru, Waipapa, and Karapiro. Samples were collected from the six lakes at approximately 4-weekly intervals. The samples were taken with a Nansen water sampling bottle in mid-channel at 1 m

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Section: Introductionsupporting

confidence: 90%

“…However, there are some outstanding differences. Chapman et al (1957) did not record Melosira distans in their check list, but none of their collection localities was on the Waikato River. Hill (unpublished 1969) did not record M. distans in Lake Ohakuri.…”

Section: Introductionmentioning

confidence: 99%

Phytoplankton in six hydroelectric lakes on the Waikato River, New Zealand, 1970–72

Magadza

1978

New Zealand Journal of Marine and Freshwater Research

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“…This is based on a short list of algae found in a pond at Oakleigh, Victoria, in August 1886 (Watts, 1886). There is at least one report for New Zealand (Mather, 1928) prior to the recent mass growths and the species was included in the checklists of New Zealand freshwater algae by Chapman et al (1957) and Cassie (1984); this record for the North Island is for a ditch in the Hutt Valley at the southern end of North Island. In the case of a record from New Caledonia (Manguin, 1962), the organism was initially treated as a variety of D. geminata, but recognized as a species by Metzeltin & LangeBertalot (1995).…”

Section: Southern Hemispherementioning

confidence: 99%

Biology of the freshwater diatom Didymosphenia: a review

2009

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Features of the colonial diatom Didymosphenia are reviewed, especially D. geminata. Although there is a long record of its occurrence in north temperate regions, mass growths have been reported much more widely in recent years. Contrary to some statements in the literature, there are also reliable older records for the southern hemisphere, though the first report of mass growth was in New Zealand in 2004. The annual cycle of morphological changes in D. geminata in northern England, and probably elsewhere, includes a winter period when motile cells are attached to the substratum followed by spring when stalks start to develop. These raise cells into the water column and provide a site for phosphatase activity. Environmental factors associated with success include absence of extreme floods, high light, pH above neutral and nutrient chemistry. D. geminata often, but not always, occurs in waters where the N:P ratio is high for much of the year, but the key factor is the ratio of organic to inorganic phosphate. D. geminata thrives where organic P is predominant and the overall P concentration is low enough for organic P to be an important P source. It is unknown whether organic N can be used. Environmental changes increasing the relative importance of organic P are likely to favour D. geminata. Likely examples are increased N:P due to atmospheric N deposition and changes in form and seasonality of P release from organic-rich soils due to climatic warming. The nutrient chemistry of deep water released from dams to rivers also needs investigation. To what extent are genetic changes occurring in response to environmental changes and are new ecotypes spreading round the world? In spite of many adverse reports about D. geminata, such as detached mats blocking water pipes, there is still doubt about the extent to which it causes problems, particularly for fish. There have been few adverse effects on migratory salmonids in Europe and North America, but at least one report of harm to a brown trout population in USA. In New Zealand, it has caused serious problems for water sports, although it remains open to question how much adverse effect it has had on fish populations. If the presence of microcystins in or associated with D. geminata, as indicated recently for two populations, proves to be widespread and at sufficiently high concentration, their possible accumulation in fish requires study. Where control is required, this could Handling editor: Pierluigi Viaroli be achieved by enhancing the ratio of inorganic to organic phosphate in the water early in the growth season. Practical ways to achieve this are suggested.

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“…Extended outbreaks of algae can potentially impact the ecological balance to the detriment of the existing macrophytes (Ecological Engineering, 2005). The genus Carteria was previously recorded in the Mediterranean Egyptian waters (El-Sherif and Mikhail, 2003), despite its habitat as pure freshwater form (Reynolds, 2006), and was found to live in sewage waters and wastewater treatment ponds (Chapman et al, 1957), which may indicate that the genus is an indicator for sewage water and has adapted to live in Marabella village site in salinity ranging from 38.61 to 39.95 PSU, where it attained a peak of 2.7x10 6 unit/L. However, Carteria was recorded in Lake Edku during year 2000 accompanied by high nutrient salts (Zaghloul and Hussein, 2000).…”

Section: Discussionmentioning

confidence: 99%

Changes in phytoplankton community structure at three touristic sites at western Alexandria Beach.

Din

Halim

2008

Egypt. J. of Aquatic Biolo. and Fish.

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ABSTRACThe phytoplankton abundance, chlorophyll-a and diversity cycle in the Mediterranean sea water, west of Alexandria (Naubaria, reference site), El Mohandessin, Marakia and Marabella tourism villages were studied during the perivd from March 2005 to Jan. 2006 and the results were discussed in relation to some environmental physico-chemical parameters. A total of 208 taxa were recorded in the study area and characterized by different ecological affinities extending from typical marine forms (107 taxa), to freshwater euryhaline forms (101 taxa). The Naubaria site was the most diversified community (176 taxa) followed by El Mohandessin village site (90 taxa), Marakia village site (83 taxa) and Marabella village site (54 taxa). Bacillariophyceae was the predominant group in the study area except in Marabella village site, where Chlorophyceae was predominant in September (99.53%). Few species were responsible for abundance peaks, namely: Cyclotella kütziginiana, Rhizosolenia fragellissima (July), Rhizosolenia setigera (September), Skeletonema costatum (November) in Naubaria site; Skeletonema costatum (November) in El Mohandessin site; Rhizosolenia setigera (September) in Marakia site; Carteria sp. (September) in Marabella site. Chlorophyll-a varied greatly from an average of 0.77 µg/L at Marabella site to 2.66 µg/L at Naubaria site, classifying Naubaria and ElMohandessin sites between mesotrophic to oligotrophic status and Marakia and Marabella sites as oligotrophic. Species diversity had a negative effect on phytoplankton abundance, ranging between 0.53 and 2.99 nats at Naubaria site, 0.13 and 2.39 nats at El Mohandessin site, 0.56 and 2.54 nats at Marakia site, and between 0.03 and 2.79 nats at Marabella site. The blooms of few dominant species were accompanied with low diversity under the prevailing ecological conditions reflecting the effect of wastewater effluents discharged in Naubaria, El-Mohandessin and Marabella sites. Thus, they should be kept under investigation to control pollution, whereas the co-dominance of several species, accompanied with low nutrient concentrations at Marakia village site suggests free conditions.

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Additions to the check list of freshwater algae in New Zealand—II

Cited by 15 publications

References 30 publications

Phytoplankton in six hydroelectric lakes on the Waikato River, New Zealand, 1970–72

Phytoplankton in six hydroelectric lakes on the Waikato River, New Zealand, 1970–72

Biology of the freshwater diatom Didymosphenia: a review

Changes in phytoplankton community structure at three touristic sites at western Alexandria Beach.

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