MARC details
| 000 -LEADER |
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| fixed length control field |
03626caa a22003737 4500 |
| 001 - CONTROL NUMBER |
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| control field |
350267 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
nz |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20180713045722.0 |
| 006 - FIXED-LENGTH DATA ELEMENTS--ADDITIONAL MATERIAL CHARACTERISTICS--GENERAL INFORMATION |
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| fixed length control field |
m |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
090611s2008 nz ab d eng |
| 035 ## - SYSTEM CONTROL NUMBER |
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| System control number |
(Sirsi) a142452 |
| 043 ## - GEOGRAPHIC AREA CODE |
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| Geographic area code |
u-nz--- |
| 080 ## - UNIVERSAL DECIMAL CLASSIFICATION NUMBER |
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| Universal Decimal Classification number |
574.587(931):582.26 |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Wood, Hannah F. |
| 245 14 - TITLE STATEMENT |
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| Title |
The benthic ecology and food web dynamics of Te Waihora (Lake Ellesmere) : |
| Remainder of title |
A thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Ecology in the University of Canterbury / |
| Statement of responsibility, etc |
by Hannah F. Wood. |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) |
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| Date of publication, distribution, etc |
2008. |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
84 p. : |
| Other physical details |
ill., maps ; |
| Dimensions |
30 cm. |
| 502 ## - DISSERTATION NOTE |
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| Dissertation note |
Thesis (M.Sc.) - University of Canterbury, 2008. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc |
Includes bibliographic references p. 74-84. |
| 520 #3 - SUMMARY, ETC. |
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| Summary, etc |
Coastal and shallow lakes are often subjected to eutrophication due to nutrients from catchment farming activities. Lake Ellesmere (Te Waihora) is a hyper-eutrophic lake which has gained recent attention because of concerns over its ecological health and fishery status. This study investigated the benthic ecology of the lake by extensive spatial and temporal sampling. Eight littoral sites were sampled on a single occasion, and 20 benthic sites were sampled once per season for one year. Water chemistry conditions, substrate and invertebrate communities varied significantly around the lake. Salinity, pH, DO and seston were primarily affected by freshwater inputs from inflow streams and salt water intrusion due to the lake opening to the sea. On these occasions, salinity reached 32 đ at the lake outlet. The lake invertebrate community was depauperate, comprising of only two species of invertebrate predators restricted to the littoral zone and eight benthic invertebrate taxa, dominated by oligochaetes, amphipods and chironomids. Benthic invertebrate abundances also reflect the dominant local substrate, where oligochaetes and chironomids preferred areas of silt substrate, whereas Potamopyrgus preferred harder substrate. Stable isotope and gut analysis determined that the primary food sources within the lake were phytoplankton and algae. Macrophytes provided a minimal contribution to the food web, possibly relating to the change in status from a clear water, macrophyte dominated lake to a turbid, phytoplankton dominated condition since the Wahine Storm in 1968. Isotope analysis also showed that the lake food web was markedly different in its carbon values from food webs of its inflow streams and nearby marine source. However the lake food web did show a marine-derived carbon signature. A mesocosm experiment testing the effect of common lentic predators on the abundance of the lake chironomid Chironomus zealandicus, showed that if invertebrate predators were present in the lake they could markedly reduce the abundance of the pest prey species. This study highlights that the frequent re-suspension of bottom sediments, lake level fluctuation resulting in wetting and drying of littoral zones, and the management of the lake opening to the sea all have an effect on the benthic ecology of Te Waihora. |
| 590 ## - LOCAL NOTE (RLIN) |
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| Local note |
CHRISTCHURCH: 574.587(931) BEN |
| 590 ## - LOCAL NOTE (RLIN) |
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| Local note |
Contact the library for access to the PDF version |
| 650 #4 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
BENTHIC ECOLOGY |
| 9 (RLIN) |
39643 |
| 650 #4 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
ECOLOGY |
| 9 (RLIN) |
26547 |
| 650 #4 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
FOOD WEBS |
| 9 (RLIN) |
5894 |
| 650 #4 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
DYNAMICS |
| 9 (RLIN) |
16635 |
| 650 #4 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name as entry element |
LAKE ELLESMERE (TE WAIHORA) |
| 9 (RLIN) |
53111 |
| 650 #4 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
LAKES |
| 9 (RLIN) |
48735 |
| 650 #4 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
CANTERBURY |
| 9 (RLIN) |
35845 |
| 650 #4 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
COASTAL ZONE |
| 9 (RLIN) |
45083 |
| 650 #4 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
NEW ZEALAND |
| 9 (RLIN) |
39580 |
| 650 #4 - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name as entry element |
THESES |
| 9 (RLIN) |
22671 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Koha item type |
ABSTRACT |
| Koha issues (borrowed), all copies |
1 |
| Source of classification or shelving scheme |
Universal Decimal Classification |