Macroinvertebrates associated with aquatic macrophytes in Lake Alexandria, New Zealand
作者:
JoyM. Talbot,
JonetC. Ward,
期刊:
New Zealand Journal of Marine and Freshwater Research
(Taylor Available online 1987)
卷期:
Volume 21,
issue 2
页码: 199-213
ISSN:0028-8330
年代: 1987
DOI:10.1080/00288330.1987.9516216
出版商: Taylor & Francis Group
关键词: Lake Alexandrina;freshwater ecology;macroinvertebrates;macrophytes;aquatic communities;seasonal changes;trophic categories
数据来源: Taylor
摘要:
Macroinvertebrates from six macro‐phyte communities and from an intermittently vegetated sublittoral community were collected from Lake Alexandrina during a period of 2.5 years. Each of the six communities was dominated by one native species (Myriophyllum triphyllum, Isoetes alpinus, Chara fibrosavar.acanthopitysorChara globularis)or by the adventiveElodea canadensis. Thirteen of the 21 macroinvertebrate taxa associated with these communities were herbivores and/or detritivores and these contributed at least 90% to total abundance; the remaining eight were predators. The gastropodPotamopyrgus antipoda‐rumwas dominant in all communities; overall, gastropods (four species) contributed between 66 and 90% to total abundance. A few species showed a marked preference for certain communities. Seasonal changes in macroinvertebrate abundance and biomass are discussed and the results compared with those from other New Zealand lakes. Biomass data for all communities and the extent of the oscillations in biomass between years are consistent with the designation of mesotrophic status for Lake Alexandrina.
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