Описание
This resource provides the abundance of macroinvertebrates in Lake Wamala. Data was collected in sites with varying land degradation levels.
Записи данных
Данные этого occurrence 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 342 записей.
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:
Pabire W G, Egessa R (2020): Abundance of macroinvertebrates in sites with varying degradation levels in Lake Wamala. v1.1. National Fisheries Resources Research Institute. Dataset/Occurrence. http://ipt-uganda.gbif.fr/resource?r=macro-invertebrates_wamala&v=1.1
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 Non Commercial (CC-BY-NC 4.0).
Регистрация в GBIF
Этот ресурс был зарегистрирован в GBIF, ему был присвоен следующий UUID: b34036fa-f8de-4bbe-b2a2-f90ba0a234fd. National Fisheries Resources Research Institute отвечает за публикацию этого ресурса, и зарегистрирован в GBIF как издатель данных при оподдержке GBIF Uganda.
Ключевые слова
Occurrence; Uganda; Lake Wamala; Macro-invertebrates; Degradation; Observation
Контакты
- Originator
- Laboratory technician
- Nile Crescent, Plot 39/45, Opposite the wagon ferry terminal
- Originator
- Research officer
- Nile Crescent, Plot 39/45, Opposite the wagon ferry terminal
- User
- Research officer
- Nile Crescent, Plot 39/45, Opposite the wagon ferry terminal
- Point Of Contact
- Research officer
- Nile Crescent, Plot 39/45, Opposite the wagon ferry terminal
Географический охват
The resource covers Lake Wamala. The lake is a UNEP designated environmental change hotspot (https://na.unep.net/atlas/webatlas.php?id=391).
| Ограничивающие координаты | Юг Запад [0,221, 31,74], Север Восток [0,431, 32,038] |
|---|
Таксономический охват
Описание отсутсвует
| Class | Hirudinea, Oligochaeta |
|---|---|
| Order | Podocopa |
| Family | Ceratopogonidae, Chironomidae, Libellulidae, Libellulidae |
| Genus | Ablabesmyia, Baetis, Caenis, Chaoborus, Chironomus, Clinotanypus, Cloeon, Ephemerythus, Petrophila, Procladius, Tanypus |
| Species | Povilla adusta |
Временной охват
| Период формирования | 2016-2017 |
|---|
Данные проекта
Land use and land-use change influence aquatic ecosystem health, ultimately impacting fish production and livelihoods of fishery-dependent communities. This project aimed at generating knowledge to guide effective investments in interventions to promote sustainable land management practices in the Lake Victoria Crescent agro-ecological zone. This was envisaged to limit the undesirable influence of unsustainable land management practices on the Lake Environment and biotic components, contributing to the sustainability of livelihoods.
| Название | Promoting Sustainable Catchment Management Practices to Improve the Aquatic Ecosystem Health and Livelihoods on Lake Wamala |
|---|---|
| Финансирование | The project was supported by the Global Environmental Facility (GEF) through its funding provided to the Government of Uganda. |
| Описание района исследования | The project was implemented on Lake Wamala. Lake Wamala is an environmental change hotspot within the Lake Victoria watershed. The lakes has an area of 250 sq. km, an average depth of 5m and a catchment of ≈2000 sq. km. The catchment is dominated by croplands that have increased since the 1990s at the expense of a native land cover. |
| Описание плана выполнения исследований | The aim of the project was to examine how land-use practices adjacent to the lake influence aquatic fauna. Occurrence and abundance were examined for benthic macroinvertebrate communities in sites with different levels of land degradation. The hypothesis was that different levels of land degradation are associated with different physical and chemical water conditions which in turn influence the structure of benthic macroinvertebrate communities. |
Исполнители проекта:
- Principal Investigator
Методы сбора
At each site and sampling stations, benthic macroinvertebrates were collected using a Ponar grab (238 cm2 open-jaw area). Three vertical hauls of sediment at each sampling station were taken and then pooled into a composite. Each composite sample was then sieved through a 400µm nitex mesh to concentrate the sample. All the samples were placed in clean, labeled sample bottles and preserved with 5% sugar formalin solution for taxonomic identification and enumeration in the laboratory. In the laboratory, the formalin-fixed benthic macroinvertebrate samples were rinsed through tap water to remove preservatives before subsampling and sorting of the organisms. All the animals were separated, counted, and identified to the smallest taxonomic level possible under a dissecting microscope following taxonomic keys by Mandahl-Barth (1954), Pennak (1953) and Merritt and Cummins (1997). Numerical abundance (individuals per square meter, Ind.m-2) was then calculated for each taxon.
| Охват исследования | The study was conducted between October 2016 and October 2017 in sites with different levels of land degradation. Papyrus was the common vegetation adjacent to water and the different sites of the lake are surrounded by different thicknesses of this vegetation although, in some sites, it has been cleared up to the lake’s shoreline. Seven sampling sites were selected for the study. The sites were categorized into three as follows: (1) Less degraded sites (2) Degraded sites, and (3) Riverine sites, based on the level of adjacent land degradation, the thickness of the shoreline vegetation and location near the river mouth. Within each site, three sampling stations were established at Shoreline, 250 m and 500 m in an inshore-offshore direction. |
|---|---|
| Контроль качества | The samples were immediately processed in the field and treated with formalin to keep the organisms of interest intact. To avoid loss of organisms during sample processing, appropriate mesh sizes during sieving. Appropriate taxonomic keys were used. |
Описание этапа методики:
- Collection of the macroinvertebrates: In the field, sediment samples were collected using a Ponar grab with an open jaw surface area of 238 cm2. At each site, three sediment samples were obtained. The three samples were mixed and concentrated to form one composite sample for each site.
- Preserving the samples: The composite sample for each site was separately preserved in 5% formalin to maintain the organisms in good condition prior to analysis in the laboratory.
- Identification of macroinvertebrates: In the laboratory, formalin was rinsed off from each sample and placed in white flat-bottomed trays. Using pairs of forceps, all benthic macroinvertebrates were sorted from the sediment and the individual taxa identified to the lowest possible taxonomic level using appropriate identification keys and a dissecting binocular microscope at 4x 25 magnification.
Библиографические ссылки
- Mendahl-Barth, G. (1954). The Freshwater Mollusks of Uganda and Adjacent Territories. Annls Mus. r. Congo Belge, 8°, Zoology, 32: 1–206.
- Merritt, R. W., & Cummins, K. W. (1997). An introduction to the aquatic insects of North America (3rd ed.). Dubuque: Kendall/Hunt Publishing Co. 720 Pg.
- Pennak, R.W. (1953). Fresh-water Invertebrates of the United States. John Wiley & Sons, New York. 769pg.
Дополнительные метаданные
| Альтернативные идентификаторы | b34036fa-f8de-4bbe-b2a2-f90ba0a234fd |
|---|---|
| http://ipt-uganda.gbif.fr/resource?r=macro-invertebrates_wamala |