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  • 1.
    Djerf, Henric
    Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH).
    Can wetlands reduce humic substances in forested streams: combining two approaches to characterize efficiency2018Conference paper (Refereed)
  • 2.
    Djerf, Henric
    Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH).
    Åtgärdsförslag för att förbättra vattenkvaliteten i Arkelstorpsviken2020Report (Other academic)
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  • 3.
    Djerf, Henric
    et al.
    Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH).
    Elmberg, JohanKristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH). Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap.
    Djerf, Henric (Contributor)
    Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH).
    Elmberg, Johan (Contributor)
    Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH). Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap.
    Jönsson, K. Ingemar (Contributor)
    Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH). Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap.
    Rehnstam-Holm, Ann-Sofi (Contributor)
    Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH). Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap.
    Söderquist, Pär (Contributor)
    Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH). Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap.
    Vought, Lena B. M. (Contributor)
    Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH). Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap.
    Bioblitz i Arkelstorp 16-17 augusti 20192020Collection (editor) (Other academic)
    Abstract [sv]

    Arkelstorpsviken är den nordvästra delen av Oppmannasjön, som ären av Skånes största sjöar. Idén att genomföra en så kallad Bioblitzvid Arkelstorpsviken föddes under ett styrelsemöte i projektet "En viki Sjöriket Skåne" som är ett samarbete mellan Oppmanna Vånga Bygderåd och Högskolan Kristianstad. Projektets främsta syfte är att hitta en lösning på den kraftiga övergödningen i Arkelstorpsviken. Detta är ett ”Leader”-finansierat projekt, vilket innebär att stommen i projektetär lokal förankring. Det fanns röster i byn som kände att man gav området onödigt dåligt rykte genom att ständigt lyfta fram problemen med vattenstatusen i sjön. Under ett styrelsemöte 30 sep 2018 föddes iden att genom en Bioblitz lyfta fram de positiva värdena i och kring sjön. Den naturliga samarbetspartnern för detta projekt var forskningsmiljön MABH (Man & Biosphere Health) vid Högskolan Kristianstad,vars medlemmar tillsammans besitter en mycket bred biologisk kunskap.Med MABH i ryggen var alltså kompetensen säkrad för att genomföra en Bioblitz. Inbjudningar skickades ut till lokala naturorganisationerför att hitta ännu fler experter som kunde hjälpa till med särskilda artgrupper. Samtidigt jobbade man aktivt lokalt med att försöka engagera intresserad allmänhet. Inbjudningar och direktreklam skickades ut till samtliga hushåll med postadress Arkelstorp. I ett försök att synas genom mediebruset anordnades en tävling, som gick ut på att gissa antalet arter (taxa) som hittades under Bioblitzen. Två lokala företag ställde upp och första priset för den vuxna individ som gissade närmstvar en 3-rätters måltid på Bäckaskogs Slott. De yngre tävlande kunde vinna en kanotutflykt med familjen på Ivögården.

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  • 4.
    Djerf, Henric
    et al.
    Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH).
    Hagman, David
    Inventeringsfiske i Arkelstorpsviken: 13-17 Augusti 20192019Report (Other academic)
    Abstract [sv]

    Arkelstorpsviken är en grund och kraftigt övergödd vik. Som efter sjö sänkningen är avskild från Oppmannasjön med en kanal på 1 km. Vid den norra stranden ligger samhället Arkelstorp. Under åren 2018-2020 driver Oppmanna Vånga byggderåd ett LEADER projekt tillsammans med Högskolan Kristianstad. Projektet syftar till att ta reda på varför sjön är kraftigt övergödd och vad som är lämpliga åtgärder för att bättra vatten kvaliteten. Arkelstorpsviken är intressant då miljöövervakningen indikerar att stora mängder näringsämne lämnar vikennedströms. Dessa näringsämnen hamnar först i Ivösjön men sedan i Hanöbukten.  Denna undersökning är gjord som del i LEADER projektet för att få en inblick hur den ekologiska statusen är i Arkelstorpsviken.   

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  • 5.
    Djerf, Henric
    et al.
    Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH).
    Lacoursière, Jean O
    Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH). Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap.
    Mårtensson, Lennart
    Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH). Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap.
    Can wetlands reduce humic substances in forested streams: combining two approaches to characterize efficiency2018In: Book of abstracts: Linnaeus ECO-TECH '18, 2018Chapter in book (Other academic)
    Abstract [en]

    Establishing statistical significance in assessing wetland performance can be quite challenging when reduction in the monitored substance is very small and temporarily variable. Assessing colour changes associated with humic substances is such a situation. One of the most important parameters of any evaluation of wetland treatment performances is the retention time of the water before it exit the wetland. This can be theoretically estimated, but even better measured directly with the help of a tracing agent. In this research, the approach is based on the simultaneously assessment of hydraulic retention time using conservative tracing (Rhodamine WT) and a mass balance based removal efficiency assessment (regression slope of the summation mass-in vs. summation mass-out).

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  • 6.
    Ghahfarokhi, Sina
    et al.
    Linnaeus University.
    Djerf, Henric
    Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH).
    Yu, Changxun
    Linnaeus University.
    Åström, Mats
    Linnaeus University.
    Ketzer, Marcelo
    Linnaeus University.
    Wetlands under influence of acid sulfate soils: case study: Southern Sweden, Kristianstad, Norra Lingenäset2018Conference paper (Refereed)
    Abstract [en]

    In recent years, wetlands have drawn scientific attention due to their environmental and economic importance. Preliminary studies show that wetlands in southern Sweden in the vicinity of Kristianstad may be contaminated by iron and aluminium (and possible other metals). Iron precipitates has led to the loss of flora and fauna within the protected natural wetland “Norra Lingenäset” over the last decade. The source of iron is the focus of our investigations, and it is possibly associated with drained acid sulphate soils (ASS) in the north of the wetland. The drained water (varying pH 3-8) from the nearby crop land is pumped to the Norra Lingenäset wetland. Therefore, the interrelation and correlation among the ASS (source of iron contamination) and the wetland are of interest. Our primary results shows 5-70 mg/L of iron in drained water from the ASS and 50-150 mg/g of iron in the accumulated sediments in the draining ditch. Hence, the conditions and state of the cropped ASS regarding iron species and concentrations will be studied. The results from this stage will enable us to design an iron pool for the Kristianstad case study. Understanding metal transportation, speciation and depositions will aid Kristianstad crop lands and wetland managers to provide efficient and effective management plans.

  • 7.
    Ghahfarokhi, Sina
    et al.
    Linnaeus University.
    Ketzer, Mercelo
    Linnaeus University.
    Yu, Changxun
    Linnaeus University.
    Lindquist, Therese
    Linnaeus University.
    Djerf, Henric
    Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH).
    Åström, Mats
    Linnaeus University.
    Contamination of Kristianstad biosphere reservoir by metal bound sediments2019Conference paper (Refereed)
  • 8.
    Henric, Djerf
    Kristianstad University, Faculty of Natural Sciences, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Sciences, Research environment Man & Biosphere Health (MABH).
    Teknisk slutrapport: en vik i Sjöriket Skåne2021Report (Other academic)
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  • 9.
    Svensson, Britt-Marie
    et al.
    Kristianstad University, Faculty of Natural Sciences, Research environment Man & Biosphere Health (MABH). Kristianstad University, Faculty of Natural Sciences, Avdelningen för miljö- och biovetenskap.
    Djerf, Henric
    Kristianstad University, Faculty of Natural Sciences, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Sciences, Research environment Man & Biosphere Health (MABH).
    Hessel, Rebecca
    Kristianstad University, Faculty of Natural Sciences, Avdelningen för miljö- och biovetenskap.
    Effekt av UV-strålning på färgreduktion: Labbstudie2021Report (Other academic)
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  • 10.
    Söderquist, Pär
    et al.
    Kristianstad University, Faculty of Natural Sciences, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Sciences, Research environment Man & Biosphere Health (MABH).
    Dessborn, Lisa
    Kristianstad University, Faculty of Natural Sciences, Research environment Man & Biosphere Health (MABH). Kristianstad University, Faculty of Natural Sciences, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Education, Forskningsmiljön Forskning Relationell Pedagogik (FoRP).
    Djerf, Henric
    Kristianstad University, Faculty of Natural Sciences, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Sciences, Research environment Man & Biosphere Health (MABH).
    Elmberg, Johan
    Kristianstad University, Faculty of Natural Sciences, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Sciences, Research environment Man & Biosphere Health (MABH).
    Gunnarsson, Gunnar
    Kristianstad University, Faculty of Natural Sciences, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Sciences, Research environment Man & Biosphere Health (MABH).
    Holopainen, Sari
    Finland.
    Effects of released farmed mallards on species richness of breeding waterbirds and amphibians in natural, restored and constructed wetlands2021In: Wildlife Biology, ISSN 0909-6396, E-ISSN 1903-220X, Vol. 2021, p. 1-9, article id wlb.00846Article in journal (Refereed)
    Abstract [en]

    Common practices in current game management are wetland restoration and creation, as well as releases of quarry species. We studied the impact of releases of mallard ducklings on species richness of wild waterbirds and amphibians on three types of wetlands: natural, constructed and restored. Data on species richness, macrophyte cover and water characteristics (total phosphorous and pH) were collected at 32 sites in an agricultural landscape in southern Sweden. In total, 14 species of waterbirds were recorded, ranging from zero to seven per wetland and survey. Amphibians were present in 24 of the 32 wetlands; in total five species were found, ranging from zero to three per wetland. By using generalized linear modelling we found that wetland type best predicted waterbird species richness. Constructed wetlands had significantly more waterbird species, regardless of whether they were used for mallard releases or not. There were breeding amphibians in 62% of natural, 100% of restored and 77% of constructed wetlands. Breeding amphibians were present in 84% of wetlands without, and in 62% of wetlands with releases. However, included variables did not explain amphibian species richness in the wetlands. Releasing large numbers of mallards on a wetland and providing food ad libitum is likely to affect water quality, nutrient availability and predation pressure. Indeed, phosphorous levels were significantly higher in release wetlands, but no differences were found between wetland types.This means that mallard releases may increase nutrient loads in environments that are already eutrophied. However, in our study system releases did not influence species richness of waterbirds and amphibians locally. Constructing wetlands for mallard releases can thus have positive local effects on species richness.

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    Söderquist et al 2021
  • 11.
    Wendin, Karin
    et al.
    Kristianstad University, Faculty of Natural Science, Research Environment Food and Meals in Everyday Life (MEAL). Kristianstad University, Faculty of Natural Science, Avdelningen för mat- och måltidsvetenskap.
    Mårtensson, Lennart
    Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH).
    Djerf, Henric
    Kristianstad University, Faculty of Natural Science, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Science, Research environment Man & Biosphere Health (MABH).
    Langton, Maud
    SLU.
    Product quality during the storage of foods with insects as an ingredient: impact of particle size, antioxidant, oil content and salt content2020In: Foods, E-ISSN 2304-8158, Vol. 9, no 6, p. 1-16Article in journal (Refereed)
    Abstract [en]

    To increase the acceptability of insects as food in Western culture, it is essential to developattractive, high-quality food products. Higher acceptability of insect-based food has been shown ifthe insects are “invisible”. Mincing or chopping the insect material could be a first processing stepto reduce the visibility of the insects. In this work, we processed yellow mealworms by usingtraditional food techniques: chopping, mixing and heat treatment in a retort. The results show thatall factors in the experimental design (particle size, oil content, salt content and antioxidant)influenced the products to a larger extent than the storage time. The results, measured by sensoryanalysis, TBAR values (Thiobarbituric acid reactive substances), colourimetry and viscosity, showclearly that the food products packaged in TRC (Tetra recart cartons) 200 packages and processedin a retort stayed stable during a storage time of 6 months at room temperature.

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  • 12.
    Wendin, Karin
    et al.
    Kristianstad University, Faculty of Natural Sciences, Research Environment Food and Meals in Everyday Life (MEAL). Kristianstad University, Faculty of Natural Sciences, Avdelningen för mat- och måltidsvetenskap.
    Mårtensson, Lennart
    Kristianstad University, Faculty of Natural Sciences, Research environment Man & Biosphere Health (MABH). Kristianstad University, Faculty of Natural Sciences, Avdelningen för miljö- och biovetenskap.
    Djerf, Henric
    Kristianstad University, Faculty of Natural Sciences, Avdelningen för miljö- och biovetenskap. Kristianstad University, Faculty of Natural Sciences, Research environment Man & Biosphere Health (MABH).
    Langton, Maud
    SLU.
    Product quality during the storage of foods with insects as an ingredient: impact of particle size, antioxidant, oil content and salt content2020In: Foods, E-ISSN 2304-8158, Vol. 9, no 6, p. 1-16, article id 791Article in journal (Refereed)
    Abstract [en]

    To increase the acceptability of insects as food in Western culture, it is essential to develop attractive, high-quality food products. Higher acceptability of insect-based food has been shown if the insects are “invisible”. Mincing or chopping the insect material could be a first processing step to reduce the visibility of the insects. In this work, we processed yellow mealworms by using traditional food techniques: chopping, mixing and heat treatment in a retort. The results show that all factors in the experimental design (particle size, oil content, salt content and antioxidant) influenced the products to a larger extent than the storage time. The results, measured by sensory analysis, TBAR values (Thiobarbituric acid reactive substances), colourimetry and viscosity, show clearly that the food products packaged in TRC (Tetra recart cartons) 200 packages and processed in a retort stayed stable during a storage time of 6 months at room temperature.

    Download full text (pdf)
    fulltext
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