Описание
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.
Записи данных
Данные этого sampling event ресурса были опубликованы в виде Darwin Core Archive (DwC-A), который является стандартным форматом для обмена данными о биоразнообразии в виде набора из одной или нескольких таблиц. Основная таблица данных содержит 2 184 записей.
Также в наличии 1 таблиц с данными расширений. Записи расширений содержат дополнительную информацию об основной записи. Число записей в каждой таблице данных расширения показано ниже.
Данный экземпляр IPT архивирует данные и таким образом служит хранилищем данных. Данные и метаданные ресурсов доступны для скачивания в разделе Загрузки. В таблице версий перечислены другие версии ресурса, которые были доступны публично, что позволяет отслеживать изменения, внесенные в ресурс с течением времени.
Версии
В таблице ниже указаны только опубликованные версии ресурса, которые доступны для свободного скачивания.
Как оформить ссылку
Исследователи должны дать ссылку на эту работу следующим образом:
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
Права
Исследователи должны соблюдать следующие права:
Публикующей организацией и владельцем прав на данную работу является National Fisheries Resources Research Institute. Эта работа находится под лицензией Creative Commons Attribution (CC-BY 4.0).
Регистрация в GBIF
Этот ресурс был зарегистрирован в GBIF, ему был присвоен следующий UUID: 456dd86d-2222-4f3b-83ef-75551cf7e891. National Fisheries Resources Research Institute отвечает за публикацию этого ресурса, и зарегистрирован в GBIF как издатель данных при оподдержке GBIF Uganda.
Ключевые слова
Sampling event; Lake Victoria; Uganda; Murchison bay; Zooplankton
Контакты
- Metadata Provider ●
- Originator ●
- Point Of Contact
- Point Of Contact
- Originator
- Point Of Contact
Географический охват
The dataset covers Murchison bay, Lake Victoria. The bay is adjacent to Kampala, the capital city of Uganda.
| Ограничивающие координаты | Юг Запад [0,235, 32,622], Север Восток [0,302, 32,682] |
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Таксономический охват
This dataset consists of freshwater zooplankton
| Class | Hexanauplia |
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| Order | Harpacticoida |
| Family | Calanoidae, Cyclopoidae |
| Genus | Afrocyclops, Ascomorpha, Asplanchna, Chydorus, Hexathra, Macrothrix, Mesocyclops, Platyias, Polyarthra, Synchaeta, Trichocerca |
| Species | 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 |
Временной охват
| Период формирования | 2012-2013 |
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Данные проекта
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.
| Название | Management criteria for Lake Ecosystem in Murchison Bay |
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| Финансирование | The work was conducted with support from the Ministry of Water and Environment, Uganda. |
| Описание района исследования | 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. |
| Описание плана выполнения исследований | 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. |
Исполнители проекта:
- Metadata Provider
Методы сбора
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.
| Охват исследования | Sampling was conducted in August/September 2012 and August 2013. |
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| Контроль качества | 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). |
Описание этапа методики:
- 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)
Библиографические ссылки
- 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
Дополнительные метаданные
| Альтернативные идентификаторы | http://ipt-uganda.gbif.fr/resource?r=zooplankton-of-murchison-bay |
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