Zooplankton occurrences (present/absent) and community structure in three habitat types in northern Lake Victoria, Uganda

Data Records

The data in this sampling event resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 3,961 records.

1 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.

Versions

The table below shows only published versions of the resource that are publicly accessible.

How to cite

Researchers should cite this work as follows:

Kiggundu V, Mwebaza-Ndawula L, Makanga B, Nachuha S, Musinguzi L, Natugonza V (2019): Zooplankton occurrences (present/absent) and community structure in three habitat types in northern Lake Victoria, Uganda. v1.2. National Fisheries Resources Research Institute. Dataset/Samplingevent. http://ipt-uganda.gbif.fr/resource?r=zooplankton&v=1.2

Rights

Researchers should respect the following rights statement:

The publisher and rights holder of this work is National Fisheries Resources Research Institute. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: 7eedbc1e-d362-4c8b-805f-37a7e2c21198.  National Fisheries Resources Research Institute publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Uganda.

Keywords

Samplingevent; Occurrence; Uganda; Zooplankton; Lake Victoria

Contacts

Geographic Coverage

The study was undertaken in the Napoleon Gulf, Lake Victoria and nearby stabilizing waste water ponds.

Taxonomic Coverage

This dataset covers freshwater zooplankton.

Temporal Coverage

Project Data

This work was part of an MSc research project that was done in three habitat types in Napoleon Gulf, Lake Victoria, Uganda (Vincent et al., 2012). The results of the project indicated that zooplankton community structure that can be used as a biological indicator of water quality in the Lake Victoria region, and confirmed the negative impacts of environmental conditions created by release of nutrients into the water systems.

The personnel involved in the project:

Sampling Methods

Zooplankton samples were collected with a conical plankton net (Nansen type; mesh size 60 µm; mouth diameter 0.25 m), towed vertically through the water column, as described by Mwebaza-Ndawula (1994). Each sample was washed with tap water in the laboratory over a 53 µm sieve to remove the preservative and then diluted to a suitable volume, depending on the concentration of organisms in each sample. Sub-samples of 2, 2, 5 and 10 mL were taken with a wide bore automatic pipette from a well agitated sample. The sub-sample series were performed to consider the more abundant organisms in 2, 2 mL series, and the rarer organisms in 2, 2, 5, 10 mL series. Each sub-sample was put into a counting chamber and examined under inverted microscope (Hund, Wetzlar, Germany) at X100 magnification for taxonomic determination, and X40 for counting and organism body measurements.

Method step description:

1. Collection of the zooplankton In the field, a conical plankton net (Nansen type; mesh size 60 µm; mouth diameter 0.25 m), towed vertically through the water column to have an integrated sample was used to collected the zooplankton. Three hauls were taken per site and were combined to make a composite sample. Preserving the samples The composite sample was preserved with sugar-formalin, in a ratio of 1-part formalin to 10 parts sample volume, the sugar was to stop the ballooning of cladocerans for easy identification. Identification of zooplankton taxa In the laboratory, samples were washed using a sieve of 53 µm to remove the fixatives. Some organisms were identified to species level using published keys (Sars, 1895, Pennak, 1953, Brooks, 1957, Rutner-Kolisko, 1974, Koste, 1978, Boxshall and Braide, 1991, Korinek, 1999). Density of organisms were calculated from the counts data, with reference to the sample net mouth diameter and water column depth at each sampling site (Mwebaza-Ndawula, 1998, unpubl. PhD Thesis)

Bibliographic Citations

1. Boxshall, G. A. & Braide, E. I. 1991. The freshwater cyclopoid copepods of Nigeria, with an illustrated key to all species. Bull. Br. Mus. Nat. Hist. (zool), 57, 185-212.
2. Brooks, J. L. 1957. The systematics of North American Daphnia. Memoirs of the connecticut academy of Arts and Sciences, 13, 1-18.
3. Korinek, V. 1999. A guide to limnetic species of Cladocera of African inland waters (Crustacea, Branchiopoda). The International Association of Theoretical and Applied Limnology. SIL.
4. Koste, W. 1978. Rotatoria. Die Radertiere Mitteleuropas. Ein Bestimmungwerk, begrundet vo Max Voig. Uberrordnung Monogononta. Gebruder Borntraeger, Berlin, Stuttgart.
5. Pennak, R. W. 1953. Fresh-water invertebrates of the United States, New York, John Wiley & Sons.
6. Rutner-Kolisko, A. 1974. Planktonic rotifers: Biology and taxonomy, Biological Station Lunz of the Austrian Academy of Science. E. Schweizerbart’sche Verlagsbuchhandlung.
7. Sars, G. O. 1895. An account of the Crustacea of Norway, Christiania and Copenhagen Alb. Cammermeyer Forlag
8. Vincent, K., Mwebaza-Ndawula, L., Makanga, B. & Nachuha, S. 2012. Variations in zooplankton community structure and water quality conditions in three habitat types in northern Lake Victoria. Lakes & Reservoirs: Research & Management, 17, 83-95.

Additional Metadata