Activities

Field experiments with pollinators finished – emptying of wetlands postponed to next year

The field material (various traps nests and nest boxes) from the pollinator field experiments that now have been terminated, have been collected and stored. Due to the very high rainfall in August we could not carry out the planned test with effects of draining some of the wetlands. We have however got permission from the landowners so we will do it next year (weather permitting). This experiment (emptying of ca 14 wetlands) is part of all 3 projects (Wetlands as buffers, Management of wetlands and Wetlands 2.0) and will hopefully give answers to different research quesitons in the three projects.

New field experiment with effects of PFAS on Red mason bee

We investigate the effects of PFAS on the solitary bee Osmia bicornis, by placing nests with pupae in an industry area with known very high PFAS-concentrations in the water, and in the agricultural areas with low concentrations as control. The map shows the location of the nest boxes.

Purple dots indicate location of Osmia nests in the “PFAS-area” (Kistinge industry) and green dots is the location of nests in the adjacent agricultural landscape.

Thesis work on pollinators and water

Two students from Halmstad University are doing their thesis work using our field experiment with the 45 nest box packages in the projects Wetlands 2.0 and LIFE-Goodstream. Irina Nilsson has investigated effects of distance to water and difference in nest hole occupancy between industrial areas vs. agricultural areas. Maria Holmgren has studied the effect of different wood types of the nest boxes.

Field survey continues

Since the weather conditions are important Björn and Lea had to work throughout the weekend to be able to complete the sureveys of the 14 wetlands during similar weather.

Preparations for surveys in the field experiment

Today we tested the methods of the surveys in the field experiment. We tested the method at our own land at LIlla Böslid. In transects going from the wetland shoreline and 30-50 m perpendicular to the wetlands we will investigate frequency of flowers (flowering units) and the pollinators. The data will be related to e.g. elevation, soil moisture and surrounding landscape structures in the near area.

Nest boxes deployed for study on droughts and importance of water bodies for pollinators in the agricultural landscape

This week Björn and Sofia placed 56 specially designed nest boxes at 14 wetlands to study how distance from water affect nesting performance. At each wetland nest boxes were placed in gradients from the water. 7 of the 14 wetlands will later in summer be drained to simulate drought to investigate effects of catastrophic hydrological events on the pollinators.

Nest boxes

The nest box packages are designed to test effects of hole diameter and wood material on the nesting frequency of different species of solitary bees and wasps. The locations of the package were designed so we can get answers to questions on effects of distance from CWs, and effects of nearby surroundings. The map shows the locations of the 45 nest box packages and also the locations of 8 of the 85 trap nests, located in the stream Trönningeån drainage area.

Networking

We are networking with the project LIFE-Goodstream www.Goodstream.se and are using the large number of artificial nests that are planned to be deployed in the drainage area of the stream Trönningeån. In total 275 nest boxes are used. The nests boxes are bundled into 45 different “nest box packages”.

Trapnest update

Now all trap nests have been located at the CWs. In total 85 trap nests are deployed. In each trap nest there are 23 nesting tubes, giving at total of 1 955 available nests at the 85 CWs.

Pollinators

We have done the first sampling of pollinators using pan traps (colour bowls). 3 traps of different colour have been placed at 50 CWs.

Meeting

We had a meeting with our project partners from Stockholm University to discuss the biodiversity sampling in our different projects.

Trapnest

We have started to place trap nests in constructed wetlands (CWs), and we use the same CWs we have selected for the project “Wetlands as Buffers” (see data on that project on the tab at the Homepage). The trap nests are placed on the wooden pole supporting the water level meters in the different CWs (see photo)

BioWetland is launched

Welcome to BioWetland!

Wetlandscapes & Biodiversity – Buffer, Biodiversity and Bees

Research on how constructed wetlands(CWs) function hydrologically in a river basin perspective and how hydrology and its interactions with wetland design, location and management affect the biodiversity in wetlands and at the landscape level, with focus on arthropods in terrestrial-aquatic boundaries and pollinators.