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Metadatabase view - dataset: Time series of plankton data from Lake Mjøsa, Norway

General information

dataset entry ID:
FWM_9
name of the dataset:
full name of the dataset:
Time series of plankton data from Lake Mjøsa, Norway
dataset short name:
Mjøsa plankton series
type of dataset (more information):
species (taxonomic group) per site database including environmental information
data type:
point data/observation data
short description of the dataset/summary:
This paper gives an overview of the >40 years long time series of zooplankton, phytoplankton and other environmental monitoring data from Lake Mjøsa in South-East Norway. The lake was impacted by eutrophication in the 70s-80s and has been successfully restored to good ecological status. The dataset currently comprises zooplankton and phytoplankon at species level from early 1970s to 2015, and water chemistry data from the same period.
The phytoplankton and water chemistry data are available online from NIVA's web portal AquaMonitor and will be updated regularly with new monitoring data. Zooplankton data are not yet publicly available, but publication through AquaMonitor is foreseen for future projects.
science keywords according to GCMD:
topic:
Agriculture, Biosphere, Biological Classification, Climate Indicators, Terrestrial Hydrosphere
keywords:
lake, phytoplankton, zooplankton, time series, eutrophication, restoration, climate change, monitoring
ISO topic category according to ISO 19115:
Farming, Biota, Environment, Inland Waters

Technical and administrative specifications

data format:
Oracle
others/details:
Data are stored in Oracle, can be downloaded to Access and Excel via web interface (in Norwegian).
operating system:
all Windows systems
Norwegian
current access level:
web (public)
http://www.aquamonitor.no/mjosovervak/
others/details:
Zooplankton data are not yet publicly available, but can be obtained upon request.
currently available through GBIF:
no
exchange planned:
no
data in data repository:
no
Do you plan to publish the data on the Freshwater Biodiversity Data Portal:
no
update level:
update planned
others/details:
The dataset is updated yearly
type:
internal description
language:
others/specify
specify:
Norwegian
others/details:
A data report is published yearly by NIVA (in Norwegian with English summary).
contact details:
metadata contact person:

first, last name:
Jannicke
 
Moe
phone:
+47 90898108
email:
jmo@niva.no
institution:
NIVA
address:
Gaustadalléen 21
postal code, city:
0349
 
Oslo
country
Norway
www.niva.no
technical contact person:

Birger
 
Skjelbred
bis@niva.no
scientific contact person:

first, last name:
Jarl Eivind
 
Løvik
email:
jel@niva.no

Intellectual property rights and citation

NIVA
dataset creator (data compiler):
contact name:
Jannicke Moe
contact email:
jmo@niva.no
contact institution:
NIVA
data contributors to/owners of this dataset:
single
criteria for using this dataset:
The dataset is publicly available (data portal, data archive) and can be used without restrictions, but dataset creator/data contributors must be informed prior to publication. Data must be acknowledged and cited correctly.
other/additional criteria:
The data can be downloaded and used, but we recommend that the contact persons are contacted for collaboration on use of the data.
citation of this dataset:
author(s):
NIVA
title:
Data from Lake Mjøsa. Accessed at www.aquamonitor.no/mjosovervak
year:
2016
citation of the metadata:
author(s):
Løvik J. E. & Moe S. J.
title and journal (name, number, pages):
Time series of plankton data from Lake Mjøsa, Norway. Freshwater Metadata Journal 18: 1-9
year:
2016
doi (if applicable):
https://doi.org/10.15504/fmj.2016.18

General data specifications

regional coverage of the dataset:
scale of the dataset:
catchment
continents:
Europe
southernmost latitude [°]:
60.400
northernmost latitude [°]:
61.134
westernmost longitude [°]:
10.433
easternmost longitude [°]:
11.294
        
minimum altitude:
123
 
metres
maximum altitude:
123
 
metres
Europe: Norway
Group C: temperate/mesothermal climates
 
Europe:
Northern Baltic Drainages
Fenno-Scandian Shield (ER22)
ecosystem type:
lakes/ponds
1974
 
year to:
2015
comments:
From 1980s until present, there are data from 10-12 samples every year.
Data from the 1970s are less regular than the later data.

Site specifications

coordinate system/grid data:
latitude/longitude, format: DMS
datum (e.g. WGS84):
WGS84
grid data available:
no
lakes (classification mainly according to WFD):
altitude typology:
 lowland: <200 m
 exact altitudinal data available: yes
depth typology based on mean depth:
 > 15m
 exact depth data available: yes
size typology based on surfcae area:
 0,5 to 1 km², 1 to 10 km², 10 to 100 km², > 100 km²
 exact surface area data available: yes
geology:
 siliceous
 exact geological data available: yes
trophic state:
stratification:
site coding available:
yes
alphanumerical
example:
M074
number of sites:
<100
5
comments:
Species-level phytoplankton data are currently available from one station only. Phytoplankton data from more stations may be available in the future. Zooplankton samples have been taken from one station only.
Water chemistry and other environmental data are also available from 6 tributary rivers.
More site information (geology, stratification etc.) is available from Holtan (1979) and Boehrer et al. (2013).

Climate and environmental data

climate related data:
available per:
per site
spatial resolution of the data (if not catchment/site related):
others/specify
others:
see comments
available parameters:
mean annual temperature January, July
data source:
www.met.no
available parameters:
mean annual temperature for each month
data source:
www.met.no
available parameters:
minimal, maximal and mean winter and summer temperatures
data source:
www.met.no
available parameters:
daily air temperatures
data source:
www.met.no
available parameters:
mean annual precipitation
data source:
www.met.no
available parameters:
winter and summer precipitation
data source:
www.met.no
available parameters:
mean discharge
data source:
www.nve.no
available parameters:
wind
data source:
www.met.no
comments:
Daily meteorological data can be downloaded from eklima.met.no, stations Kise (12550) and Toten (11500).
environmental data:
available parameters per catchment:
catchment size
data source:
http://vann-nett.no
available parameters per catchment:
catchment geology
data source:
www.ngu.no
available parameters per catchment:
catchment land cover/land use
data source:
Løvik et al. 2016
available parameters per catchment:
population density
data source:
Hobæk et al. 2012
available parameters per catchment:
presence of barriers/dams/reservoirs (fragmentation)
available parameters per catchment:
hydrological regime/flow regime
data source:
www.nve.no
available parameters per site:
catchment land use upstream of sampling site
data source:
Løvik et al. 2016
available parameters per site:
information on water uses (e.g., irrigation, fish ponds)
data source:
Løvik et al. 2016
available parameters per site:
distance to next migration barrier upstream
available parameters per site:
distance to next migration barrier downstream
available parameters per site:
distance to the next lake upstream
available parameters per site:
distance to the next main village/town upstream
available parameters per site:
altitude
data source:
www.nve.no
available parameters per site:
hydrological regime/flow regime
data source:
www.nve.no
available parameters per site:
discharge
data source:
www.nve.no
available parameters per site:
maximum depth
data source:
www.vann-nett.no
available parameters per site:
mean depth
data source:
www.vann-nett.no
physico-chemistry data:
total P, nitrate, total N, hardness, alkalinity, TOC (total organic carbon), water temperature, pH, conductivity, chlorophyll, colour, Secci disc depth, thermocline depth
other physico-chemical parameters:
Other parameters: E. coli (2009-2011), ice cover (1949-2009), primary production, SiO2, turbidity (2007-2012)
availability of physico-chemical data, if there is more than one sample per site:
per sample
comments:
Most physico-chemical parameters are available from 1972 to present. Some are available only since 2007 (alkalinity, colour, conductivity, pH, TOC).
reference sites available:
no
available stressor types:
stressorrestored sites availabledata before/after restoration availablestressor gradient availablecomments
eutrophication
yes
yes
yes
The lake was eutrophied until 1990s.
organic pollution
no
no
no
 
toxic stress
no
no
no
 
hydrologic stress (e.g. impoundment, flow velocity reduction, hydropeaking, water abstraction, flow velocity increase)
no
no
no
 
thermal stress
no
no
no
Lake temperature has increased during the monitoring period.

Biological data

biological data origin:
from sampling; specify project:
Monitoring of Lake Mjøsa by NIVA from 1972 until present.
organism group addressed:
zooplankton, phytoplankton
comments:
Zooplankton samples include Mysis relicta.
More information on zooplankton data can be found in Rognerud & Kjellberg 1990, Kjellberg et al. 1991 and Løvik & Kjellberg 2003.
More information on phytoplankton data (including palaeolimnological data) can be found in Hobæk et al. 2012.

Sample specifications/sample resolution

zooplankton

sample information:
covered timeframe:

year from - to:
1972 - 2015
historical data:
yes
palaeo data:
no
season:
spring, summer, autumn
temporal resolution/frequency of sampling:
biweekly samples, 10-12 per year during May-October
time series data:
yes
taxonomic resolution:
species
percentage of species level data:
100
taxonomic coding:
taxalist according to:
Artsdatabanken (Norwegian Biodiversity Information Centre)
Artsdatabanken (2015). Artsnavnebasen. Norsk taksonomisk database. http://www.artsportalen.artsdatabanken.no/. Artsdatabanken follows the International Code of Zoological Nomenclature (http://www.iczn.org/).
full species name
Bosmina longispina
sample specifications:
quantitative (abundance data)
no
408
25-L Schindler trap, counting of individuals in whole samples or a representative part of samples by means of binocular microscope.
Bottrell et al. (1976), Hessen et al. (1995), Schindler (1969).
9 separate samples from the 0-50 m depth interval each sampling date, counting data integrated for the whole interval.
Pelagial zone, sampling location at the deepest part of the lake
comments:

Sampling, identification and counting of zooplankton have been performed mainly by Gösta Kjellberg, Gerd Justås and Jarl Eivind Løvik.

phytoplankton

sample information:
covered timeframe:

year from - to:
1972 - 2015
historical data:
yes
season:
spring, summer, autumn
temporal resolution/frequency of sampling:
biweekly samples, 10-12 per year during May-October
time series data:
yes
taxonomic resolution:
species
percentage of species level data:
100
comments:
Phytoplankton data grouped by class are available online on
www.aquamonitor.no/mjosovervak. Original data on species level can be obtained upon request.
taxonomic coding:
The database uses the taxonomic code RUBIN, which is not international. All taxonomic information can be obtained upon request.
RUBIN code
APHA FLO
sample specifications:
quantitative (abundance data)
476
Sampling: Norwegian Standard (NS 9459:2004) Analysis: Norwegian Standard (NS-EN 15204:2006)
NS 9459:2004: Water quality - Guidance on sampling of phytoplankton from lakes and reservoirs NS-EN 15204:2006: Water quality - Guidance standard on the enumeration of phytoplankton using inverted microscopy (Utermöhl technique)
Integrated sample from the pelagic, representing the euphotic zone of the lake.
Pelagic, integrated sample from 0-10 meters.
comments:

Identification and counting of phytoplankton have been performed mainly by Pål Brettum and Birger Skjelbred.

Other specifications

GIS layers, shapes related to the dataset:
catchments, river-sub-basins
others (specify):
More GIS layers are probably available, but not included in this dataset.
yes
yes
quality control procedures:
Were any quality control procedures applied to your dataset?
yes
Sampling and biological and chemical analyses followed standard procedures and
Norwegian Standards.
Direktoratsgruppa (2013). Klassifisering av miljøtilstand i vann. Økologisk og
kjemisk klassifiseringssystem for kystvann, grunnvann, innsjøer og elver. Veileder 02: 2013. Utgitt av Direktoratsgruppa for gjennomføring av Vanndirektivet. 263 pp. (In Norwegian)
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