Today (Tuesday 7 April) Raviv Gal, NRRV PhD-student, will give a seminar entitled Mussels and ecosystem functioning in streams. The Seminar is held online via the video conference system zoom.

You can follow the seminar by clicking here.

The seminar starts at 13:15, everyone who wants to is welcome to attend the seminar.

Freshwater pearl mussels (Margaritifera margaritifera) in the River Vasslabäcken.

On Friday 13 March, Kalle Filipsson, NRRV PhD-student, will defend his (my) licentiate thesis. The thesis has the title ”From behaviour to genes: anti-predator responses of brown trout (Salmo trutta) under winter conditions”. The defense will be held in room 1B309 (Sjöströmsalen) at Karlstad University, and starts at 10:00. Stefán Óli Steingrímsson, Professor at Hólar University, Iceland, is the opponent. The defense is open for everyone who wishes to attend.

Kalle’s licentiate thesis, nailed to one of the “theses trees” at the Biology Department at Karlstad University.
Three juvenile brown trout (Salmo trutta), doing trout stuff in a stream flume at Karlstad University.

On Tuesday 14 January, Jacqueline Hoppenreijs, RivEM PhD-student, will give a seminar titled “Rooting for riparian vegetation”. Jacqueline will present her plans for her PhD project during the seminar, with emphasis on her fieldwork this summer.

The seminar starts at 13:15 in room 5F416 at Karlstad University. Everyone who wants to are welcome to attend the seminar.

 

Jacqueline doing fieldwork

 

Riparian plants in the growroom at Karlstad University

Karlstad University invites applications for three full-time PhD positions in ecology!

 

Two of the positions focus on applied aquatic conservation biology and aim to examine:

Position 1) Ecological effects of remedial measures in regulated rivers, e.g. implementation of fish passage solutions and dam removal, on diadromous fish species in southern Sweden.

Position 2) Reintroduction ecology of the freshwater pearl mussel and the thick-shelled river mussel and their host fishes in southern Sweden.

Read more and apply for the positions here, last application date is 31 January 2020.

 

The third position is on ecological and individual-based modelling and aims to:

i) Develop high-resolution spatially explicit maps of physical habitats in rivers, (ii) assess river hydraulic conditions using 2- or 3-D hydraulic models, (iii) develop and apply individual based models of fish population in rivers to assess the effects of river regulation.

Read more and apply for the position here, last application date is 10 January 2020.

 

The doctoral program consists of 240 higher education credits (4 years), including the doctoral thesis. Doctoral students may also be assigned department duties (up to 20 % of full time), such as teaching, which will extend the PhD position accordingly.

 

River Klarälven, Sweden

In early fall 2019, Finja Löher from Germany did an internship with the River Ecology and Management Research Group at Karlstad University. Here she writes about her visit:

“In 2018, I studied at Karlstads Universitet for two terms as part of my bachelor program “Environmental and Sustainability Studies” (Leuphana University in Lüneburg, Germany). These studies included two of the courses from the master program “Ecology and Conservation Biology” offered here at the biology department. Ever since I left Sweden, I’ve been hoping to return to Karlstad. On the one hand, I simply fell in love with the country with all its lakes and forests and fikas. On the other hand, I also gained a very appealing impression of the research being carried out in this department. Although I mostly focus on environmental chemistry in my studies in Germany, I nevertheless have a strong interest in ecological research, not least because of the courses I took here at KAU. Therefore, I was more than happy to return to Karlstad for three weeks for a practical training this fall.

During my stay here, I was lucky to have the opportunity to work together with several of the researchers here and to be involved in their work. This enabled me to get to know a variety of ongoing research projects and to better understand how much work and thought it takes to develop any such project. Among others, I assisted RNA analyses working with photo spectroscopy and in vitro PCR (polymerase chain reactions) in order to assess how the bacterium C. agnes influences the occurrence of the transmembrane protein PD-L1 in macrophages. I also had the chance to wander around in the woods collecting birch tree leaves and catching some wolf spiders in order to assist PhD projects aiming at assessing the influence of clams on biodegradation of organic material and at decoding the remaining prey DNA in spider gut contents, respectively. Additionally, I was happy to take part in two amazing excursions focusing on regional socio-ecological systems and their resilience. After spending a beautiful birthday on Hammarö and digging into some of the local history, the second excursion took us up the Klarälven River where we had a look at the former steel industry in Munkfors as well as at the hydropower plant and the sportfishing association in Forshaga. I furthermore gained some new insights by listening to several student presentations assessing the characteristics and the resilience of specific socio-ecological systems as well as by attending a seminar offered on the LIFE CONNECTS project which aims to restore several rivers and streams in Southern Sweden. Towards the end of my practical training, I was involved in the student courses some more by leading a discussion seminar.

Furthermore, I set up a small research project together with fellow interns. We aimed at assessing the quantity and diversity of the macroinvertebrate drift in a small forested stream situated in close proximity to the university. In order to work towards this goal, we installed a net in the stream that would trap all the invertebrates drifting with the flow during a specific time frame. We spent quite some time going through these samples and identifying the invertebrates down to the lowest reliable taxon. Being rather inexperienced with drift theory and invertebrate taxonomy previous to this internship, I was able to dig into these topics and extend my knowledge.

Last but not least, this practical training was a great chance for me to enjoy some of Swedish nature and culture, to have some great discussions and way too many cups of coffee, to meet old friends and to make new ones, to attend a climate strike in the country where it all began, and to work on my Swedish language skills a bit. Many thanks go out to John Piccolo for being a great contact person and for all the support before and during my stay here. Also, I want to thank everyone at the department for the warm welcome and for introducing me to their work. Keep it up!”

 

The paper led by scientists of the Department of Engineering and Chemical Sciences, Karlstad University, was co-authored by Lutz Eckstein, professor of biology at the Department of Environmental and Life Sciences.


He writes about their work:

“Sweden has about 28 million hectares of forests, and pine trees constitute 40% of the total standing volume. Since the country is the world’s second largest exporter of pulp, paper and wood products, a total of 400 million containerized tree seedlings are produced by Swedish forest nurseries to restock forests each year. However, intensive annual forest harvests remove essential soil nutrients, which may cause problems for forest productivity.

In Sweden, container-grown seedlings are dominantly produced in peat and peat-based growth media. Peat-based substrates have many advantages such as long-term drainage ability, good aeration for tree seedling roots, good fertilizer absorbance and release capability. However, peat-based media are considered non-sustainable as their extraction have adverse environmental impacts. Therefore, sustainable approaches towards forest production and plantation management are urgently needed.

Therefore, the aim of this paper was to study the effects of hydrochar, derived from paper mill biosludge, on growth, quality, mycorrhizal associations and nutrient/heavy metal uptake of pine tree seedlings. We analyzed whether effects varied significantly between hydrochar forms (powder or pellets) or hydrochar proportions mixed with peat (10% or 20% hydrochar v/v). The effects of hydrochar addition on pine tree seedling was evaluated under three fertilization regimes (no fertilizer, 50% fertilizer and 100% fertilizer). We hypothesized that the growth, quality and mycorrhizal colonization of pine tree seedlings grown in substrate mixed with hydrochar would improve. We also expected pine tree seedlings grown with hydrochar to require less fertilizer to achieve similar or higher growth, mycorrhizal colonization and associated nutrient uptake relative to seedlings grown without hydrochar but with optimum rates of fertilizer (100% fertilizer). To our knowledge, this current study is the first paper to explore the potentials of hydrochar powder and pellets for being used as a growing media component in production of containerized pine tree seedlings.

Application of hydrochar had positive or neutral effects on shoot biomass and stem diameter compared with control seedlings (without hydrochar) under tested fertilizer levels. Analysis of the natural logarithmic response ratios (LnRR) of quality index and nutrient and heavy metal uptake revealed that application of 20% (v/v) hydrochar powder or pellet with 50% fertilizer resulted in same quality pine seedlings with similar heavy metal (Cu, Ni, Pb, Zn and Cr) and nutrient (P, K, Ca and Mg) contents as untreated seedlings supplied with 100% fertilizer. Colonization percentage by ectomycorrhizae significantly increased when either forms of hydrochar were applied at a rate of 20% under unfertilized condition. The results of this study implied that application of proper rates of hydrochar from biosludge with adjusted levels of liquid fertilizer may reduce fertilizer requirements in pine nurseries.”

Read the paper for free here! 

Jacqueline Hoppenreijs recently joined the NRRV research group. Here she writes about her previous work and what she intends to do as a PhD student at Karlstad University:

Hej! I’m Jacqueline Hoppenreijs and I recently started my PhD in the NRRV group at Karlstad University. During my MSc, which I did at the Department of Environmental Science at Radboud University in Nijmegen (the Netherlands) and the Department of Ecology at SLU Uppsala, I worked on different species groups: plants, birds and insects and wrote two theses. The first one, with fellow student Bas van Lith, explored possibilities for bird population restoration on the Indonesian island of Java, using historical sources on bird population development and land use change over the course of a century. During the second one, I studied the importance of different man-made habitat types for pollinators in Sweden, over the course of a season.

 

Bas and I birdwatching in Rancaekek, by Fachmi Azhar Aji

 

Despite studying quite different time frames and taxa, biodiversity, ecosystem functioning and conservation have been recurring themes. Coming from the overpopulated Netherlands, I find myself very interested in the interface of human society and nature, and more specifically nature restoration, conservation efforts and their ethical aspects.

As a junior researcher at the Department of Animal Ecology & Physiology at Radboud University, I dove a bit deeper in the influence that human actions can have on the natural world. I worked in Rob Leuven’s group to identify the potential risks of invasive (alien) species in horticulture, biological control and food forestry.

As from April 2019, I’m working with Lutz Eckstein and Lovisa Lind. We’re focusing on both fundamental and applied aspects of plant ecology and I’m looking forward to unravel the mechanisms that drive plant dispersal and community composition in boreal riparian zones. Next to that, I’m excited to be part of an active education environment and the passionate group of researchers that forms the NRRV, and can’t wait to meet the rest of Karlstad’s community!

 

Vegetation sampling on Omey Island, by Joop Schaminée

Seke Chainda

Global Swede is an initiative by the Swedish government to promote long-term relations with international students in Sweden, with the aim to create cross-border networks and future collaborations.

Seke Chainda, Master student in Biology at Karlstad University, was awarded as Global Swede 2019 together with 25 other international students studying in Sweden. The students have distinguished themselves in their areas of study and in terms of both innovation and entrepreneurship. They have therefore been deemed good representatives for both Sweden and their home countries. Seke Chainda is from Senanga, a town in western Zambia. On 21 May, Seke visited the Ministry of Foreign Affairs (Utrikesdepartementet) in Stockholm to participate in the Global Swede ceremony. Seke received his diploma from Ann Linde, the Swedish Minister for Foreign Trade.

 

 

 

 

Thomas Blom (Pro-Vice-Chancellor at Karlstad University), Seke Chainda and Stina Eriksson (Vice Head of the Biology Department at Karlstad University) at the Global Swede Ceremony

Seke is enrolled in the Master programme in Ecology and Conservation Biology at Karlstad University. In his master’s thesis, he examined the function of the adipose fin for the swimming performance and drift-feeding capability of juvenile salmonids, which usually is removed from juvenile fish reared at hatcheries for stocking purposes.

 

Seke Chainda, Erik Petersson (Professor at the Swedish University of Agricultural Sciences) and Elio Bottagisio (master student) doing lab work at Karlstad University

Seke Chainda together with other master students conducting field work

Seke Chainda tagging a fish

European eel, Anguilla anguilla. Photo: Jörgen Wiklund

Karlstad University has an opening for a PhD position in aquatic conservation biology. The project will focus on “Resolving production bottlenecks for the European eel”. Conserving biodiversity is one of the major challenges in applied aquatic ecology. The European eel functions as a flagship species in marine and freshwater conservation, and its population collapse is of major concern for ecologists, fishers and managers.

The aim of the PhD project is to identify:

(i) relationships between yellow eel habitat use, growth, behavior and survival.

(ii) effects of habitat characteristics and the surrounding landscape on eel large-scale movements within freshwater systems.

(iii) functioning downstream passage solutions at hydropower plants for a wide range of silver eel phenotypes.

The position is full-time for four years. Doctoral students may also be assigned departmental duties, such as teaching, which will extend the period of employment accordingly.

Read more and apply for the position here.

Last day to apply is 5 June 2019.