This data comprises three different experiments in three different areas to test methods for (A) replanting C. aspera, (B) the effects of harvesting C. aspera on the donor C. aspera meadow and (C) replanting C. tomentosa. The experiment took place over two growing seasons and light, temperature and sediment water and organic matter content data is also available for the experimental areas. Three methods of planting were tested for C. aspera, spade planting, jute band, BESE elements© and natural recolonization and two methods for C. tomentosa, BESE elements and natural recolonization. Additionally, four levels of harvesting were tested in the C. aspera meadow, removal of 0, 0.8%, 1.8% or 2.6 % of the C. aspera coverage. Shoot height, shoot density and coverage of aquatic vegetation species in the plots was measured on 1 June (before treatment), 1 July, 24 August and 29 September 2021 by snorkelling. Follow up measurements of vegetation coverage were made 15 months after initial planting on 14 September 2022 for all the plots.

Data contains personal data

Language

English

Method and outcome

Time period(s) investigated

2021-01-06 – 2022-09-14

Data format / data structure

Numeric

Species and taxons

Chara aspera
Chara tomentosa

Data collection

Mode of collection: Field/Intervention experiment
Description of the mode of collection: Shoot height, shoot density and coverage of aquatic vegetation species in the plots was measured on 1 June (before treatment), 1 July, 24 August and 29 September 2021 by snorkelling. Follow up measurements of vegetation coverage were made 15 months after initial planting on 14 September 2022 for all the plots. Sediment cores were taken for sediment organic and water content measurements. Continuous monitoring on temperature and light took place with HOBO loggers during the experiments.
Time period(s) for data collection: 2021-06-01 – 2022-09-14
Data collector: Swedish University of Agricultural Sciences
Spatial resolution: 0.5 kilometres

Geographic coverage

Geographic spread

Geographic location: Baltic Sea

Geographic description: Siviksfjärden: A sheltered shallow open bay in the Baltic Sea in Gävleborgs län

Administrative information

Responsible department/unit

Department of Aquatic Resources

Contributor(s)

Emil Kraft - Gävleborgs county board

Elena Tamarit - University of Gothenburg

Peter Nordling - Gavelborgs county board

Funding

Funding agency: County board of Gävleborg
Funding information: County board Gävleborg, funding post 1:11

Topic and keywords

Research area

Earth and related environmental sciences (Standard för svensk indelning av forskningsämnen 2011)

Environmental sciences (Standard för svensk indelning av forskningsämnen 2011)

Natural sciences (Standard för svensk indelning av forskningsämnen 2011)

Botany (Standard för svensk indelning av forskningsämnen 2011)

Ecology (Standard för svensk indelning av forskningsämnen 2011)

Biota (INSPIRE topic categories)

Oceans (INSPIRE topic categories)

Keywords

Macrophytes, Ecosystem restoration, Habitats and biotopes, Sea regions, Restoration of water systems, Baltic sea, Charophytes, Baltic sea, Chara tomentosa, Chara aspera

Publications

CL. Faithfull, E. Tamarit, P. Nordling, E. Kraft (2024). Restoring charophytes is still a challenge: a call for developing successful methods. Aquatic Botany, 193, 103777.
DOI: https://doi.org/10.1016/j.aquabot.2024.103777

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