Invertebrates, macroalgae, and chemical features in morainic ponds near Lakes Tekapo and Ohau, including new distribution records of Crustacea
作者:
CarolynW. Burns,
MargaretI. Butler,
PhilippaM. Cuttance,
期刊:
New Zealand Journal of Marine and Freshwater Research
(Taylor Available online 1984)
卷期:
Volume 18,
issue 2
页码: 197-210
ISSN:0028-8330
年代: 1984
DOI:10.1080/00288330.1984.9516042
出版商: Taylor & Francis Group
关键词: moraines;ponds;aquatic animals;invertebrates;check lists;freshwater crustaceans;ecological distribution;algae;biological surveys;water chemistry
数据来源: Taylor
摘要:
The invertebrates and macroalgae in 42 permanent and temporary ponds and kettles in glacial moraine south of Lake Ohau, and 36 sites in moraine west of Lake Tekapo, South Island, New Zealand, were sampled in December 1980, and taxonomic lists were compiled. Most organisms belonged to taxa characteristically found in shallow waters elsewhere in New Zealand, but new distributions for the rare cladoceransNeothrix armata, Monospilus dispar,andEphemeroporus barroisiwere recorded, and the presence ofSimocephalus acutirostratusin New Zealand was confirmed. Darkly pigmentedDaphnia carinatawere recorded for the first time as also were co‐occurringBoeckella triarticulataandBoeckella dilatata.Cluster analysis of the data from both areas identified 3 groups of taxa with a high probability of co‐occurrence. Some species were absent from all the sites in 1 area but present at several sites in the other. This may reflect differences in adaptation to drought, or the limited sampling regime, but is also consistent with the areas being in different ecological districts. Ponds which still contained water in late autumn were sampled for pH (6.7–7.0), conductivity (K20, 17–79 μS cm‐1), sodium (0.35–4.60 mg L‐1, chloride (0.89–5.68 mg L‐1), and osmolality (21–37 mOsM).
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