Occurrence

Abundance of macroinvertebrates in sites with varying degradation levels in Lake Wamala

Dernière version Publié par National Fisheries Resources Research Institute le 30 janvier 2020 National Fisheries Resources Research Institute
This resource provides the abundance of macroinvertebrates in Lake Wamala. Data was collected in sites with varying land degradation levels.
Date de publication:
30 janvier 2020
Licence:
CC-BY-NC 4.0

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 342 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.

Téléchargements

Téléchargez la dernière version de la ressource en tant qu'Archive Darwin Core (DwC-A), ou les métadonnées de la ressource au format EML ou RTF :

Données sous forme de fichier DwC-A (zip) télécharger 342 enregistrements dans Anglais (15 kB) - Fréquence de mise à jour: quand cela est nécessaire
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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:

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

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 Non Commercial (CC-BY-NC) 4.0.

Enregistrement GBIF

Cette ressource a été enregistrée sur le portail GBIF, et possède l'UUID GBIF suivante : b34036fa-f8de-4bbe-b2a2-f90ba0a234fd.  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; Uganda; Lake Wamala; Macro-invertebrates; Degradation; Observation

Contacts

Personne ayant créé cette ressource:

Willy Gandhi Pabire
Laboratory technician
National Fisheries Resources Research Institute
Nile Crescent, Plot 39/45, Opposite the wagon ferry terminal
343 Jinja
UG
Robert Egessa
Research officer
National Fisheries Resources Research Institute
Nile Crescent, Plot 39/45, Opposite the wagon ferry terminal
343 Jinja
UG

Personne pouvant répondre aux questions sur la ressource:

Laban Musinguzi
Research officer
National Fisheries Resources Research Institute
Nile Crescent, Plot 39/45, Opposite the wagon ferry terminal
343 Jinja
UG
https://labanmusinguzi.com/
Vianny Natugonza
Research officer
National Fisheries Resources Research Institute
Nile Crescent, Plot 39/45, Opposite the wagon ferry terminal
343 Jinja
UG

Personne ayant renseigné les métadonnées:

Laban Musinguzi
Research officer
National Fisheries Resources Research Institute
Nile Crescent, Plot 39/45, Opposite the wagon ferry terminal
343 Jinja
UG
https://labanmusinguzi.com/

Autres personnes associées à la ressource:

Utilisateur
Laban Musinguzi

Couverture géographique

The resource covers Lake Wamala. The lake is a UNEP designated environmental change hotspot (https://na.unep.net/atlas/webatlas.php?id=391).

Enveloppe géographique Sud Ouest [0,221, 31,74], Nord Est [0,431, 32,038]

Couverture taxonomique

Pas de description disponible

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

Couverture temporelle

Epoque de formation 2016-2017

Données sur le projet

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.

Titre Promoting Sustainable Catchment Management Practices to Improve the Aquatic Ecosystem Health and Livelihoods on Lake Wamala
Financement The project was supported by the Global Environmental Facility (GEF) through its funding provided to the Government of Uganda.
Description du domaine d'étude / de recherche 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.
Description du design 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.

Les personnes impliquées dans le projet:

Willy Gandhi Pabire
Robert Egessa
Vianny Natugonza
Laban Musinguzi
Chercheur Principal
Richard Ogutu-Ohwayo

Méthodes d'échantillonnage

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.

Etendue de l'étude 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.
Contrôle qualité 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.

Description des étapes de la méthode:

  1. 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.
  2. 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.
  3. 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.

Citations bibliographiques

  1. Mendahl-Barth, G. (1954). The Freshwater Mollusks of Uganda and Adjacent Territories. Annls Mus. r. Congo Belge, 8°, Zoology, 32: 1–206.
  2. 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.
  3. Pennak, R.W. (1953). Fresh-water Invertebrates of the United States. John Wiley & Sons, New York. 769pg.

Métadonnées additionnelles

Identifiants alternatifs b34036fa-f8de-4bbe-b2a2-f90ba0a234fd
http://ipt-uganda.gbif.fr/resource?r=macro-invertebrates_wamala