說明
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.
資料紀錄
此資源sampling event的資料已發佈為達爾文核心集檔案（DwC-A），其以一或多組資料表構成分享生物多樣性資料的標準格式。 核心資料表包含 2,184 筆紀錄。
亦存在 1 筆延伸集的資料表。延伸集中的紀錄補充核心集中紀錄的額外資訊。 每個延伸集資料表中資料筆數顯示如下。
此 IPT 存放資料以提供資料儲存庫服務。資料與資源的詮釋資料可由「下載」單元下載。「版本」表格列出此資源的其它公開版本，以便利追蹤其隨時間的變更。
版本
以下的表格只顯示可公開存取資源的已發布版本。
如何引用
研究者應依照以下指示引用此資源。:
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
權利
研究者應尊重以下權利聲明。:
此資料的發布者及權利單位為 National Fisheries Resources Research Institute。 This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF 註冊
此資源已向GBIF註冊，並指定以下之GBIF UUID: 456dd86d-2222-4f3b-83ef-75551cf7e891。 National Fisheries Resources Research Institute 發佈此資源，並經由GBIF Uganda同意向GBIF註冊成為資料發佈者。
關鍵字
Sampling event; Lake Victoria; Uganda; Murchison bay; Zooplankton
聯絡資訊
- 元數據提供者 ●
- 出處 ●
- 連絡人
- 連絡人
- 出處
- 連絡人
地理涵蓋範圍
The dataset covers Murchison bay, Lake Victoria. The bay is adjacent to Kampala, the capital city of Uganda.
| 界定座標範圍 | 緯度南界 經度西界 [0.235, 32.622], 緯度北界 經度東界 [0.302, 32.682] |
|---|
分類群涵蓋範圍
This dataset consists of freshwater zooplankton
| Class | Hexanauplia |
|---|---|
| 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 |
時間涵蓋範圍
| 彙整期間 | 2012-2013 |
|---|
計畫資料
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.
| 計畫名稱 | Management criteria for Lake Ecosystem in Murchison Bay |
|---|---|
| 經費來源 | The work was conducted with support from the Ministry of Water and Environment, Uganda. |
| 研究區域描述 | 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. |
| 研究設計描述 | 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. |
參與計畫的人員:
- 元數據提供者
取樣方法
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.
| 研究範圍 | Sampling was conducted in August/September 2012 and August 2013. |
|---|---|
| 品質控管 | 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). |
方法步驟描述:
- 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)
引用文獻
- 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