Descripción
This dataset presents zooplankton taxa occurrences and abundance in Murchison Bay, Northern Lake Victoria, Uganda. The data was obtained through a survey conducted in 2012 and 2013. Most of these species are microscopic with size ranging from ca 0.05mm to 2.0 mm and consist of crustaceans (copepods and cladocerans) and rotifers (wheel-animals). They (zooplankton) are important elements of the food chain where energy is transferred from algae (primary producers) to larger invertebrate predators and fish. The zooplankton species assemblage responds to environmental stressors such as nutrient enrichment, acidification, and fish stocks. The effects of environmental stress can be detected through changes in community structure (species composition, abundance, body size, and biomass) and food web structure. The ability of each species to persist in different given trophic conditions, make zooplankton a better bio-monitoring tool. Murchison bay receives effluents from an economically vibrant part of the Lake Victoria catchment (Kampala City) with much of the activities detrimental to the waters of this bay. In order to address some of the concerns, the Directorate of Water Resource Management (DWRM) carried out studies on management criteria for Lake Ecosystem in Murchison Bay in August/September of 2012 and 2013 with the objective of studying water quality indices according to specific requirements of the different water users within Murchison Bay areas for purposes of conservation and improving water quality for domestic uses and fisheries. Zooplankton was part of the key functional groups considered and documented.
Registros
Los datos en este recurso de evento de muestreo han sido publicados como Archivo Darwin Core(DwC-A), el cual es un formato estándar para compartir datos de biodiversidad como un conjunto de una o más tablas de datos. La tabla de datos del core contiene 2.184 registros.
también existen 1 tablas de datos de extensiones. Un registro en una extensión provee información adicional sobre un registro en el core. El número de registros en cada tabla de datos de la extensión se ilustra a continuación.
Este IPT archiva los datos y, por lo tanto, sirve como repositorio de datos. Los datos y los metadatos del recurso están disponibles para su descarga en la sección descargas. La tabla versiones enumera otras versiones del recurso que se han puesto a disposición del público y permite seguir los cambios realizados en el recurso a lo largo del tiempo.
Versiones
La siguiente tabla muestra sólo las versiones publicadas del recurso que son de acceso público.
¿Cómo referenciar?
Los usuarios deben citar este trabajo de la siguiente manera:
Kiggundu V, Musinguzi L, Natugonza V (2019): Occurrence (present/absence) and abundance of zooplankton in Murchison Bay, Lake Victoria. v1.0. National Fisheries Resources Research Institute. Dataset/Samplingevent. http://ipt-uganda.gbif.fr/resource?r=zooplankton-of-murchison-bay&v=1.0
Derechos
Los usuarios deben respetar los siguientes derechos de uso:
El publicador y propietario de los derechos de este trabajo es National Fisheries Resources Research Institute. Esta obra está bajo una licencia Creative Commons de Atribución/Reconocimiento (CC-BY 4.0).
Registro GBIF
Este recurso ha sido registrado en GBIF con el siguiente UUID: 456dd86d-2222-4f3b-83ef-75551cf7e891. National Fisheries Resources Research Institute publica este recurso y está registrado en GBIF como un publicador de datos avalado por GBIF Uganda.
Palabras clave
Sampling event; Lake Victoria; Uganda; Murchison bay; Zooplankton
Contactos
- Proveedor De Los Metadatos ●
- Originador ●
- Punto De Contacto
- Punto De Contacto
- Originador
- Punto De Contacto
Cobertura geográfica
The dataset covers Murchison bay, Lake Victoria. The bay is adjacent to Kampala, the capital city of Uganda.
| Coordenadas límite | Latitud Mínima Longitud Mínima [0,235, 32,622], Latitud Máxima Longitud Máxima [0,302, 32,682] |
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Cobertura taxonómica
This dataset consists of freshwater zooplankton
| Class | Hexanauplia |
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| Orden | Harpacticoida |
| Familia | Calanoidae, Cyclopoidae |
| Género | Afrocyclops, Ascomorpha, Asplanchna, Chydorus, Hexathra, Macrothrix, Mesocyclops, Platyias, Polyarthra, Synchaeta, Trichocerca |
| Especie | Bosmina longirostris, Brachionus angularis, Brachionus bidentata, Brachionus budapestinensis, Brachionus calyciflorus, Brachionus caudatus, Brachionus dimidiatus, Brachionus falcatus, Brachionus forficula, Brachionus patulus, Brachionus plicatilis, Brachionus quadridentatus, Brachionus urceolaris, Brachionus variabilis, Ceriodaphnia cornuta, Daphnia longispina, Daphnia longispina, Daphnia lumholtzi, Daphnia lumholtzi, Filinia longiseta, Filinia opoliensis, Keratella cochlearis, Keratella tropica, Lecane bulla, Lecane luna, Moina micrura, Platyias quadricornis, Polyarthra vulgaris, Synchaeta pectinata, Thermocyclops decipiens, Thermocyclops emini, Thermocyclops incisus, Thermocyclops neglectus, Thermocyclops oblongatus, Thermodiaptomus galeboides, Trichocerca cylindrica, Tropocyclops confinnis, Tropocyclops tenellus, Tropodiaptomus stuhlmanni species |
Cobertura temporal
| Periodo de formación | 2012-2013 |
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Datos del proyecto
This work was part of a water quality monitoring project undertaken in 2012-13 on Lake Victoria by the Directorate of Water Resources Management (DWRM) under the Ministry of Water and Environment in collaboration with the National Fisheries Resources Research Institute (NaFIRRI). The main objective was to develop water quality indices according to specific requirements of different water uses within Murchison bay areas. The sampling covered 20 sites sampled in 2012 and 2013.
| Título | Management criteria for Lake Ecosystem in Murchison Bay |
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| Fuentes de Financiación | The work was conducted with support from the Ministry of Water and Environment, Uganda. |
| Descripción del área de estudio | The study area was the Murchison Bay, northern Lake Victoria which is adjacent to Kampala, the capital city of Uganda that has most economic activities with high population density. The area is a depositary for industrial and domestic effluents through the Nakivubo Channel but is at the same time an obstruction point for piped water for both industrial and domestic use. |
| Descripción del diseño | Twenty sites were sampled each year that included nearshore and offshore areas targeting areas with high human activities like markets, recreational areas, water obstruction points and those adjacent streams or channels draining Kampala city. This was to compare the distribution trend and community structure of the zooplankton organisms across the sites. |
Personas asociadas al proyecto:
- Proveedor De Los Metadatos
Métodos de muestreo
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 was 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 an inverted microscope (Hund, Wetzlar, Germany) at X100 magnification for taxonomic determination, and X40 for counting and organism body measurements.
| Área de Estudio | Sampling was conducted in August/September 2012 and August 2013. |
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| Control de Calidad | Some zooplankton were able to be identified to species level using published taxonomic keys (Sars 1895; Pennak 1953; Brooks 1957; Rutner-Kolisko 1974; Koste 1978; Boxshall & Braide 1991; Korinek 1999). Taxonomic names were cross-checked using the World Register of Marine Species (WoRMS). Densities of organisms were calculated from the counts, with reference to the sample net mouth diameter and water column depth at each sampling site (Mwebaza-Ndawula L., 1998). |
Descripción de la metodología paso a paso:
- 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 collect 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). The density of organisms was 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)
Referencias bibliográficas
- 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.
- Brooks, J. L. 1957. The systematics of North American Daphnia. Memoirs of the connecticut academy of Arts and Sciences, 13, 1-18.
- 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.
- Koste, W. 1978. Rotatoria. Die Radertiere Mitteleuropas. Ein Bestimmungwerk, begrundet vo Max Voig. Uberrordnung Monogononta. Gebruder Borntraeger, Berlin, Stuttgart.
- Pennak, R. W. 1953. Fresh-water invertebrates of the United States, New York, John Wiley & Sons.
- Rutner-Kolisko, A. 1974. Planktonic rotifers: Biology and taxonomy, Biological Station Lunz of the Austrian Academy of Science. E. Schweizerbart’sche Verlagsbuchhandlung.
- Sars, G. O. 1895. An account of the Crustacea of Norway, Christiania and Copenhagen Alb. Cammermeyer Forlag
Metadatos adicionales
| Identificadores alternativos | http://ipt-uganda.gbif.fr/resource?r=zooplankton-of-murchison-bay |
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