Ocorrência

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

Versão mais recente publicado por National Fisheries Resources Research Institute em 30 de Janeiro de 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.
Publication date:
30 de Janeiro de 2020
License:
CC-BY-NC 4.0

Registros de Dados

Os dados deste recurso de ocorrência foram publicados como um Darwin Core Archive (DwC-A), que é o formato padronizado para compartilhamento de dados de biodiversidade como um conjunto de uma ou mais tabelas de dados. A tabela de dados do núcleo contém 342 registros.

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.

Downloads

Baixe a última versão do recurso de dados, como um Darwin Core Archive (DwC-A) ou recurso de metadados, como EML ou RTF:

Dados como um arquivo DwC-A download 342 registros em English (15 kB) - Frequência de atualização: quando necessário
Metadados como um arquivo EML download em English (18 kB)
Metadados como um arquivo RTF download em English (15 kB)

Versões

A tabela abaixo mostra apenas versões de recursos que são publicamente acessíveis.

Como citar

Pesquisadores deveriam citar esta obra da seguinte maneira:

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

Direitos

Pesquisadores devem respeitar a seguinte declaração de direitos:

O editor e o detentor dos direitos deste trabalho é National Fisheries Resources Research Institute. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0 License.

GBIF Registration

Este recurso foi registrado no GBIF e atribuído ao seguinte GBIF UUID: b34036fa-f8de-4bbe-b2a2-f90ba0a234fd.  National Fisheries Resources Research Institute publica este recurso, e está registrado no GBIF como um publicador de dados aprovado por GBIF Uganda.

Palavras-chave

Occurrence; Uganda; Lake Wamala; Macro-invertebrates; Degradation; Observation

Contatos

Quem criou esse recurso:

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

Quem pode responder a perguntas sobre o recurso:

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

Quem preencher os metadados:

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/

Quem mais foi associado com o recurso:

Usuário
Laban Musinguzi

Cobertura Geográfica

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

Coordenadas delimitadoras Sul Oeste [0,221, 31,74], Norte Leste [0,431, 32,038]

Cobertura Taxonômica

Nenhuma descrição disponível

Class  Hirudinea,  Oligochaeta
Ordem  Podocopa
Família  Ceratopogonidae,  Chironomidae,  Libellulidae,  Libellulidae
Gênero  Ablabesmyia,  Baetis,  Caenis,  Chaoborus,  Chironomus,  Clinotanypus,  Cloeon,  Ephemerythus,  Petrophila,  Procladius,  Tanypus
Espécie  Povilla adusta

Cobertura Temporal

Período de Formação 2016-2017

Dados Sobre o Projeto

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.

Título Promoting Sustainable Catchment Management Practices to Improve the Aquatic Ecosystem Health and Livelihoods on Lake Wamala
Financiamento The project was supported by the Global Environmental Facility (GEF) through its funding provided to the Government of Uganda.
Descrição da Área de Estudo 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.
Descrição do 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.

O pessoal envolvido no projeto:

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

Métodos de Amostragem

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.

Área de Estudo 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.
Controle de Qualidade 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.

Descrição dos passos do método:

  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.

Citações bibliográficas

  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.

Metadados Adicionais

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