Description
The dataset presents zooplankton taxa presence and absence occurrence records obtained from surveys conducted from 1992 to 2012 in different habitat types with varying depths in lakes Victoria and Nabugabo. Abundance data is provided for the present taxa. The habitats include nearshore and offshore/open waters.
Enregistrements de données
Les données de cette ressource occurrence ont été publiées sous forme d'une Archive Darwin Core (Darwin Core Archive ou DwC-A), le format standard pour partager des données de biodiversité en tant qu'ensemble d'un ou plusieurs tableurs de données. Le tableur de données du cœur de standard (core) contient 5 776 enregistrements.
Cet IPT archive les données et sert donc de dépôt de données. Les données et métadonnées de la ressource sont disponibles pour téléchargement dans la section téléchargements. Le tableau des versions liste les autres versions de chaque ressource rendues disponibles de façon publique et permet de tracer les modifications apportées à la ressource au fil du temps.
Versions
Le tableau ci-dessous n'affiche que les versions publiées de la ressource accessibles publiquement.
Comment citer
Les chercheurs doivent citer cette ressource comme suit:
Kiggundi V, Egessa R, Mwebaza-Ndawula L (2020): Zooplankton occurrences and community structure in Lakes Victoria and Nabugabo. v1.0. National Fisheries Resources Research Institute. Dataset/Occurrence. http://ipt-uganda.gbif.fr/resource?r=lakevictoriazooplankton&v=1.0
Droits
Les chercheurs doivent respecter la déclaration de droits suivante:
L’éditeur et détenteur des droits de cette ressource est National Fisheries Resources Research Institute. Ce travail est sous licence Creative Commons Attribution (CC-BY) 4.0.
Enregistrement GBIF
Cette ressource a été enregistrée sur le portail GBIF, et possède l'UUID GBIF suivante : f53fe209-a37c-409e-858e-e57c3988fe6a. National Fisheries Resources Research Institute publie cette ressource, et est enregistré dans le GBIF comme éditeur de données avec l'approbation du GBIF Uganda.
Mots-clé
Occurrence; Lake Victoria; Zooplankton; Observation
Contacts
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Couverture géographique
Lake Victoria and Lake Nabugabo
| Enveloppe géographique | Sud Ouest [-2,724, 31,553], Nord Est [0,527, 33,992] |
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Couverture taxonomique
Freshwater zooplankton
| Class | Hexanauplia |
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| Order | Harpacticoida |
| Family | Calanoidae, Cyclopoidae |
| Genus | Afrocyclops, Alona, Ascomorpha, Asplanchna, Brachionus, Ceriodaphnia, Chydorus, Euclanis, Eucyclops, Hexathra, Lecane, Macrothrix, Mesocyclops, Platyias, Polyarthra, Synchaeta, Thermocyclops, Trichocerca |
| Species | Beauchampiella eudactylota, Bosmina longirostris, Brachionus angularis, Brachionus bidentatus, Brachionus budapestinensis, Brachionus calyciflorus, Brachionus caudatus, Brachionus dimidiatus, Brachionus falcatus, Brachionus forficula, Brachionus patulus, Brachionus plicatilis, Brachionus quadridentatus, Brachionus urceolaris, Brachionus variabilis, Ceriodaphnia cornuta, Ceriodaphnia dubia, Daphnia longispina, Daphnia lumholtzi, Diaphanosoma excisum, Filinia longiseta, Filinia opoliensis, Keratella cochlearis, Keratella tropica, Lecane bulla, Lecane luna, Macrochaetus sericus, Moina micrura, Platyias quadricornis, Polyarthra vulgaris, Synchaeta pectinata, Testudinella patina, Thermocyclops decipiens, Thermocyclops emini, Thermocyclops incisus, Thermocyclops neglectus, Thermocyclops oblongatus, Thermodiaptomus galeboides, Trichocerca cylindrica, Tropocyclops confinnis, Tropocyclops tenellus, Tropodiaptomus stuhlmanni |
Couverture temporelle
| Epoque de formation | 1992-2012 |
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Données sur le projet
This work was part of research and monitoring studies done in predetermined sites and localities of Lake Victoria and Nabugabo. The results generally indicated zooplankton community comprised of majorly three broad taxa groups; Copepoda, Cladocera and Rotifera (Mwebaza-Ndawula et al., 2004). The data presented provide useful basis for tracking community changes in comparison with observations form earlier studies (Rzoska (1957; Stuhlmann, 1888), Weltner, 1897; Mrazek, 1895; Daday, 1907; Verestchagin, 1915; Delachaux, 1917; Worthington, 1931). These earlier works provided the first quantitative account of the zooplankton on Lake Victoria. The current data show changes from the bigger Calanoida and Cladocera to the smaller cyclopoid copepods (Mwebaza-Ndawula, 1994) attributed to the changes in limnological conditions during the present century, which seem to be driven primarily by changes in nutrient input and regional climate (Waya & Mwambugu, 2004).
| Titre | Zooplankton occurrences and community structure in Lakes Victoria and Nabugabo |
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| Description du domaine d'étude / de recherche | The study area was mainly the Northern part of Lake Victoria (Ugandan portion) with very few sites on the Tanzanian portion and Lake Nabugabo. |
| Description du design | The lake wide Northern portion of Lake Victoria was investigated between 1992 and 2012. Study areas represent a wider habitat based on the depth profile and distances from shoreline. |
Les personnes impliquées dans le projet:
Méthodes d'échantillonnage
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.
| Etendue de l'étude | Sampling was conducted from 1992-98, 2000-06, 2008 and 2012 and was done majorly in northern Lake Victoria, including some parts of southern portion (Tanzania) and Lake Nabugabo. |
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| Contrôle qualité | 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). Volume densities 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). |
Description des étapes de la méthode:
- 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 mixture. 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. Organisms were identified to the smallest taxonomic level possible using taxonomic 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)
Citations bibliographiques
- 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.
- Daday, E. 1907. Plancton-Tiere aus dem Victoria Nyanza. Zool. Jb. zool. Jb., 25, 245-262.
- Delachaux, T. 1917. Cladocera de la region du Lac Victoria Nyanza. Zool. Jahrb Syst, 25, 245-262.
- 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.
- Mrazek, A. 1895. Die Copepoden Ost-Afrikas. In Deutsch Ost Afrika, 4, 1-11.
- Mwebaza-Ndawula, L. 1994. Changes in relative abundance of zooplankton in northern Lake Victoria, East Africa. Hydrobiologia, 272, 256-264.
- Mwebaza-Ndawula, L. 1998. Distribution, abundance of zooplankton and Rastrineobola argentea (Pisces: Cyprinidae) and their trophic interactions in northern Lake Victoria, East Africa. , University of Vienna, Austria, Unpublished Ph.D. Thesis.
- Mwebaza-Ndawula, L., Kiggundu, V. & Pabire Ghandhi, W. 2004. The status and significance of invertebrate communities. In: BALIRWA, J. S., MUGIDDE, R. & OGUTU-OHWAYO, R. (eds.) Challenges for Management of the Fisheries Resources, Biodiversity and Environment of Lake Victoria. First ed. JInja, Uganda: Fisheries Resources Research Institute.
- 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.
- Rzoska, J. 1957. Notes on the crustacean plankton of Lake Victoria. proc. Linn. Soc. Lond, 168, 1126-125.
- Sars, G. O. 1895. An account of the Crustacea of Norway, Christiania and Copenhagen Alb. Cammermeyer Forlag
- Stuhlmann, F. 1888. Vorläufiger Bericht über eine mit Unterstützung der Königlichen Akademie der Wissenschaften unternommence Reise nach Ost-Afrika, zur Untersuchung der Süsswasserfauna. Sitzungsberichte der Königlich-Preussischen. Akademie der Wissenschaften, 1255-1269.
- Verestchagin, G. 1915. Some remarks on the fauna of central Africa. Zool. Exped Br East Africa Uganda Petrograd, 1, 1-26.
- Waya, R. K. & Mwambugu, J. A. 2004. Zooplankton Communities of selected stations of Lake Victoria. Tanzania Journal of Science, 30, 11 - 20.
- Weltner, W. 1897. Die Cladoceren Ost-Afrikas. . In Deutsch Ost Afrika, 1-14.
- Worthington, E. B. 1931. Vertical movements of freshwater macroplankton. . Int. Rev. ges. Hydrobiol. Hydrogr, 25 394-436.
Métadonnées additionnelles
| Identifiants alternatifs | http://ipt-uganda.gbif.fr/resource?r=lakevictoriazooplankton |
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