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  • 101.
    Ekelund, Nils
    et al.
    Malmö University.
    Bramryd, Torleif
    Lund University.
    Jönsson, K. Ingemar
    Kristianstad University, Research environment Man & Biosphere Health (MABH). Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Palo, Thomas
    Umeå University.
    Wamsler, Christine
    Lund University.
    Implementing the Ecosystem Services Approach at the municipal level: a transdisciplinary project with coastal communities in south Sweden2014Conference paper (Other academic)
    Abstract [en]

    In Sweden a unique project supported by the Swedish Environmental Protection Agency will be developed in close collaboration with coastal municipalities in Skåne, and with a coordinating role by Skåne´s Association of Local Authorities. These municipalities face a range of different environmental challenges, from areas along the eastern coast line facing problems related to the Baltic Sea, to municipalities in the Öresund region. In this study a range of different environmental conditions and related ecosystem services, from vulnerability to floods, erosion and sea level rise to strong pressure on coastal systems from urbanization will be investigated. Research questions and directions are built on cases and scenarios which are a part of the local municipality planning process. The approach will be to study the premises of implementing the Ecosystem Services (ES) in municipal planning and decision making of five coastal municipalities. The present study will analyse past decisions, present planning and future challenges for municipality development and management from the perspective of ES, with the aim of increasing our understanding of the ES concept as a tool for sustainable development. A second aim of the project is to evaluate the potential value of connecting the ES approach to ongoing climate change adaptation in the municipalities. The project will use the six-step approach developed by the Economics of Ecosystems and Biodiversity framework (TEEB) as the main conceptual frame. This approach includes the following steps: 1) Identifying and agreeing on the problem with stakeholders, 2) Identify the ES which are most relevant and pressing in municipality planning, 3) Collect and identify the information needs and the method to collect the data, 4) Assess expected changes in ES due to decision and input from society, 5) Identify policy options based on changes in ES and 6) Assess social and environmental impacts of 1-5.

  • 102.
    Ekström, Peter
    et al.
    Lunds universitet.
    Hansson, Lena
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Research environment Learning in Science and Mathematics (LISMA).
    Pendrill, Ann-Marie
    Lunds universitet & Göteborgs universitet.
    Questions from teachers and students: 13 years of "Ask-a-physicist" on the Web2013Conference paper (Other academic)
  • 103.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Are dabbling ducks major players or merely noise in freshwater ecosystems?: a European perspective, with references to population limitation and density dependence2009In: Wildfowl, ISSN 0954-6324, E-ISSN 2052-6458, no Special issue 2, p. 9-23Article in journal (Refereed)
    Abstract [en]

    Waterfowl ecologists consider ducks important players in patterns and processes of freshwater ecosystems. Limnologists and fish biologists, on the other hand, historically have “a bottom-up” view of the same systems, often regarding waterbirds as “background noise” compared to other biotic influences. Evidence for and against these largely opposing views is reviewed, focussing on European dabbling duck studies. In oligo- and mesotrophic wetlands at low breeding density, their role is likely to be overshadowed by biotic interactions between fish, invertebrates and plants. Conversely, many other freshwater systems may be affected by dabbling ducks in various ways, acting as dispersers of invertebrates and plants, as predators, and as eutrophicators. It is concluded that dabbling ducks affect freshwater systems more profoundly than has hitherto been acknowledged. In their turn, freshwater ecosystems affect the ducks’ population ecology. In a less comprehensive treatment, the evidence for the major paradigms addressing population limitation in dabbling ducks is discussed briefly from a European perspective. It is concluded that top-down (predation) as well as bottom-up (food limitation) processes may both affect population size, but evidence for either is correlative, necessitating more experimental studies based on explicit predictions from pattern-oriented studies. In a discussion of the prospects for adopting a more adaptive management approach for European dabbling ducks, it is argued that a lack of information about annual variation in recruitment and harvest rates are major obstacles to understanding population change and for adopting a more adaptive management. A compilation of European studies about density dependence in Mallard Anas platyrhynchos indicates that population regulation may be a common phenomenon in this species, with possible important ramifications for research as well as management programmes.

  • 104.
    Elmberg, Johan
    Kristianstad University, Research environment Man & Biosphere Health (MABH). Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Att samsas om gäss - visar Vattenriket vägen?2015In: Vattenriket i fokus, ISSN 1653-9338, no 4, p. 12-15Article in journal (Other academic)
  • 105.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Att ta plats på en angelägen arena2007In: Sarah, Vol. 5, no 1, p. 3-Article in journal (Other (popular science, discussion, etc.))
  • 106.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Bergand2007Other (Other academic)
  • 107.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Bergand2007Other (Other academic)
  • 108.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Bra häckningsår för finska vitryggar2003In: Vår fågelvärld, ISSN 0042-2649, Vol. 62, no 5, p. 30-Article in journal (Other (popular science, discussion, etc.))
  • 109.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Brånsjön - mer speciell än du tror!2006In: Fåglar i Västerbotten, ISSN 0348-1166, Vol. 31, no 1, p. 14-17Article in journal (Other (popular science, discussion, etc.))
  • 110.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Conservation biology and behaviour: from frog perspective to a bird´s eye view2014In: 10th Ecology & Behaviour meeting, Montpellier, Frankrike, 12-16/5, 2014: program and abstracts, 2014, p. 37-Conference paper (Refereed)
    Abstract [en]

    My plenary will explore the historical and ecological roots of the subdisciplines ≪conservation biology≫ and ≪behavioural ecology≫, which together make up the backbone of this session. Based on arguments about moral and factual necessities to halt biodiversity loss, I will discuss why, how and to what extent conservation biology and behavioural ecology have come to merge. I will highlight how this has affected conservation efforts in a variety of contexts and geographic settings. In doing so, most of my examples of successful integration between these research fields concern amphibians, reptiles and birds, spanning a wide range of spatial and temporal scales. My emphasis will be more on the conceptual cross-fertilization between the research fields than on the technical development permitting it. Rapid deterioration and reduction of natural habitats crucial for upholding biodiversity provides a backdrop for an analysis of research needs and a horizon scan of further integration of conservation and the study of animal behavior.

  • 111.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Ecology and natural history of the moor frog (Rana arvalis) in boreal Sweden2008In: Journal of field herpetology, no Supplement 13, p. 179-194Article in journal (Refereed)
  • 112.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Ecosystem services provided by seabirds: what projections can we make from waterbirds in general?2015In: 2nd World Seabird Conference: seabirds: Global ocean sentinels, 2015Conference paper (Refereed)
    Abstract [en]

    To facilitate conservation efforts and wise-use decisions about marine resource use there is an urgent need to further the understanding of what ecosystem services are provided by true seabirds, and to establish methodologies for quantifying the values of these services. Recent reviews address ecosystem services for birds in general (Wenny et al 2011) and for waterbirds (Green & Elmberg 2014), but such analyses are still much needed for the true seabirds. I will use insights from previous general reviews to outline research needs, shortcuts, generalities, projections, and pitfalls in the study of ecosystem services in true seabirds. In doing so, I will contrast previous knowledge and current knowledge gaps with characteristics unique for many seabirds, e.g. small population size, highly localized (vulnerable) breeding sites, extreme mobility, K-selected life histories, bycatch mortality and methodological problems associated with studying them.

  • 113.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Research environment Man & Biosphere Health (MABH).
    En islom som aldrig kom hem2017In: Anser: Skånes ornitologiska förening, ISSN 0347-9595, Vol. 56, no 1, p. 30-31Article in journal (Other (popular science, discussion, etc.))
  • 114.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    En punktinsats för nya fågelupplevelser eller Fågelskådning på nya vägar2005In: Fåglar i Västerbotten, ISSN 0348-1166, Vol. 30, no 3, p. 9-11Article in journal (Other (popular science, discussion, etc.))
  • 115.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Expertutlåtande om drakar2008In: Dagens Nyheter, ISSN 1101-2447, Vol. 08-01Article in journal (Other (popular science, discussion, etc.))
  • 116.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Felbestämd korsnäbb2007In: Vår fågelvärld, ISSN 0042-2649, Vol. 66, no 3, p. 36-Article in journal (Other (popular science, discussion, etc.))
  • 117.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Fortsatt uppåt för vitryggen i Finland2008In: Vår fågelvärld, ISSN 0042-2649, Vol. 67, no 2, p. 34-Article in journal (Other (popular science, discussion, etc.))
  • 118.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Hur livat är det i holken egentligen?: en smula populationsekologi för knipor och holkuppsättare2002In: Vår fågelvärld, ISSN 0042-2649, Vol. 61, no 7, p. 28-29Article in journal (Other (popular science, discussion, etc.))
  • 119.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Hur lärkfalken vred min sverigekarta rätt2005In: Vår fågelvärld, ISSN 0042-2649, Vol. 64, no 8, p. 20-23Article in journal (Other (popular science, discussion, etc.))
  • 120.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Forskningsmiljön Man and Biosphere Health (MABH).
    Lever elfenbensnäbben?2013In: Vår fågelvärld, ISSN 0042-2649, Vol. 72, no 2, p. 8-Article in journal (Other academic)
  • 121.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Mer krut på fågelskyddet!2008In: Vår fågelvärld, ISSN 0042-2649, Vol. 67, no 2, p. 35-Article in journal (Other (popular science, discussion, etc.))
  • 122.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Forskningsmiljön Man and Biosphere Health (MABH).
    Nötskrikans vintervanor2012In: Vår fågelvärld, ISSN 0042-2649, Vol. 71, no 5, p. 12-Article in journal (Other academic)
  • 123.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Punktinsats på hög nivå gav "fel" spettar2006In: Fåglar i Västerbotten, ISSN 0348-1166, Vol. 31, no 1, p. 2-3Article in journal (Other (popular science, discussion, etc.))
  • 124.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Slätten tur och retur på 25 år2001In: Fåglar i Västerbotten, ISSN 0348-1166, Vol. 26, p. 54-57Article in journal (Other (popular science, discussion, etc.))
  • 125.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Success factors behind multi-stakeholder management of geese in an agricultural landscape2016In: 7th North American Duck Symposium: waterfowl ecology and adaptive management, 2016Conference paper (Refereed)
    Abstract [en]

    On both sides of the Atlantic, geese are a major management challenge, not least because of shifting distributions, increased availability of nutritious agricultural forage, and unprecedented growth of some populations. In northwest Europe, managers face the task of devising management strategies for areas with up to 10 co-occurring goose species. These taxa range from being globally threatened to over-abundant, usually present in mixed-species assemblages whose composition change seasonally. I present a case study from a densely populated agricultural region in south Sweden where goose numbers and damage by geese on crops have increased dramatically during recent decades. A goose management group (GMG) was founded in 2002 comprising landowners, farmers, hunters, ornithologists, conservation NGOs, and local and county level administration. The GMG has autonomy to self-organize and a key point is that it has neither legal jurisdiction nor authority to make formal decisions. This makes the GMG adaptive, free to react quickly to signals from the socio-ecological system. In essence, the GMG provides a collaborative arena for sharing experiences and discussing conflicts. With time this has built trust between stakeholders so that there is no longer any disagreement over input variables such as goose numbers, bag size, and magnitude of crop damage. Further GMG success factors are its continuity over time, that it is embedded in the local community, and that some of its members also represent authorities that do have jurisdiction over hunting permits and crop damage reimbursement. This is an example of how human-wildlife conflicts can be reduced and defused by simple means. Interestingly, GMG members as well as people outside the group consider it a success even though it has not led to reduced goose numbers locally, illustrating that understanding the sociology of management conflicts is often just as important as understanding biological details of the system.

  • 126.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Varför sätta näbbsadelmärken på krickor?2004In: Ringinform, ISSN 1100-4134, Vol. 26, no 1, p. 38-Article in journal (Other (popular science, discussion, etc.))
  • 127.
    Elmberg, Johan
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Ärta2007Other (Other academic)
  • 128.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Andersson, Å
    Sjöberg, K
    Stjärtand2007Other (Other academic)
  • 129.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Arzel, Céline
    Frankrike.
    Forskare efterlyser rapporter om näbbmärkta änder2003In: Jakt och jägare, ISSN 1401-8306, Vol. 63, no 9, p. 25-Article in journal (Other (popular science, discussion, etc.))
  • 130.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Arzel, Céline
    Frankrike.
    Kricka från Brånsjön flyger till Wales - och lär oss mer om en ovanligt okänd vanlig fågelart2003In: Fåglar i Västerbotten, ISSN 0348-1166, Vol. 28, no 3, p. 73-74Article in journal (Other (popular science, discussion, etc.))
  • 131.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Arzel, Céline
    Frankrike.
    Näbbmärkta änder i nytt forskningsprojekt2003In: Svensk jakt nyheter, Vol. 8, no 5Article in journal (Other (popular science, discussion, etc.))
  • 132.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Arzel, Céline
    Finland.
    Guillemain, Matthieu
    Frankrike.
    Rovdjur och mat gör krickans dag till natt2007In: Vår fågelvärld, ISSN 0042-2649, Vol. 66, no 7, p. 15-17Article in journal (Other (popular science, discussion, etc.))
  • 133.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Arzel, Céline
    Frankrike.
    Guillemain, Matthieu
    Frankrike.
    Ändernas hemliga nattliv2008In: Svensk jakt, ISSN 0039-6583, Vol. 146, no 4, p. 274-276Article in journal (Other academic)
  • 134.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Arzel, Céline
    Frankrike.
    Guillemain, Matthieu
    Frankrike.
    Lepley, Michel
    Frankrike.
    Bosca, Fabrice
    Frankrike.
    Legagneux, Pierre
    Frankrike.
    Nogues, Jean-Baptiste
    Frankrike.
    Flyway patterns of food abundance in Eurasian Teal (Anas crecca crecca)2006In: Integrating science and duck management : 4th North American duck symposium and workshop, 2006, p. 52-53Conference paper (Refereed)
  • 135.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Research environment Man & Biosphere Health (MABH).
    Berg, Charlotte
    Swedish University of Agricultural Sciences.
    Lerner, Henrik
    Ersta Sköndal Bräcke University College.
    Waldenström, Jonas
    Linneaus University.
    Hessel, Rebecca
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Research environment Man & Biosphere Health (MABH).
    Potential disease transmission from wild geese and swans to livestock, poultry and humans: a review of the scientific literature from a One Health perspective2017In: Infection Ecology & Epidemiology, ISSN 2000-8686, E-ISSN 2000-8686, Vol. 7, no 1Article in journal (Refereed)
    Abstract [en]

    There are more herbivorous waterfowl (swans and geese) close to humans, livestock and poultry than ever before. This creates widespread conflict with agriculture and other human interests, but also debate about the role of swans and geese as potential vectors of disease of relevance for human and animal health. Using a One Health perspective, we provide the first comprehensive review of the scientific literature about the most relevant viral, bacterial, and unicellular pathogens occurring in wild geese and swans. Research thus far suggests that these birds may play a role in transmission of avian influenza virus, Salmonella, Campylobacter, and antibiotic resistance. On the other hand, at present there is no evidence that geese and swans play a role in transmission of Newcastle disease, duck plague, West Nile virus, Vibrio, Yersinia, Clostridium, Chlamydophila, and Borrelia. Finally, based on present knowledge it is not possible to say if geese and swans play a role in transmission of Escherichia coli, Pasteurella, Helicobacter, Brachyspira, Cryptosporidium, Giardia, and Microsporidia. This is largely due to changes in classification and taxonomy, rapid development of identification methods and lack of knowledge about host specificity. Previous research tends to overrate the role of geese and swans as disease vectors; we do not find any evidence that they are significant transmitters to humans or livestock of any of the pathogens considered in this review. Nevertheless, it is wise to keep poultry and livestock separated from small volume waters used by many wild waterfowl, but there is no need to discourage livestock grazing in nature reserves or pastures where geese and swans are present. Under some circumstances it is warranted to discourage swans and geese from using wastewater ponds, drinking water reservoirs, and public beaches. Intensified screening of swans and geese for AIV, West Nile virus and anatid herpesvirus is warranted.

  • 136.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Research environment Man & Biosphere Health (MABH).
    Dessborn, Lisa
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Arzel, Céline
    Andungar har bra koll när faran hotar2014In: Vår fågelvärld, ISSN 0042-2649, Vol. 73, no 3, p. 34-35Article in journal (Other (popular science, discussion, etc.))
  • 137.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Research environment Man & Biosphere Health (MABH).
    Dessborn, Lisa
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Arzel, Céline
    Så undviker andungarna rovdjuren2015In: Svensk jakt, ISSN 0039-6583, Vol. 153, no 6, p. 38-40Article in journal (Other (popular science, discussion, etc.))
  • 138.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Forskningsmiljön Man and Biosphere Health (MABH).
    Green, M.
    Gustafsson, R.
    Haas, F.
    Liljebäck, N.
    Lindström, Å.
    Nilsson, L.
    Ottosson, U.
    Ottvall, R.
    Svensson, M.
    Svensson, S.
    Tjernberg, M.
    Hur många fåglar finns det i verkligheten?2013In: Vår fågelvärld, ISSN 0042-2649, Vol. 72, no 2, p. 58-59Article in journal (Other academic)
  • 139.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Forskningsmiljön Man and Biosphere Health (MABH).
    Gunnarsson, Gunnar
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Forskningsmiljön Man and Biosphere Health (MABH).
    Svältrisk orsak till att flera västerbottniska sjöar saknar häckande änder2012In: Fåglar i Västerbotten, ISSN 0348-1166, Vol. 37, no 1, p. 10-13Article in journal (Other (popular science, discussion, etc.))
  • 140.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Gunnarsson, Gunnar
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Nummi, Petri
    Finland.
    Pöysä, Hannu
    Finland.
    Sjöberg, Kjell
    SLU.
    Density dependent breeding success in mallards2003Conference paper (Refereed)
    Abstract [en]

    Breeding success in wild mallards was studied on small eutrophic nemoral lakes in a two-year cross-over experiment in which wing-clipped conspecifics were added to increase pair density. The number of wild mallards that came to the lakes to nest (prior to introductions) did not differ between years. Introduction treatment led to a significant reduction in brood number in wild mallards, but it did not alter the number of stage 2+ ducklings finally produced on a lake. Introduction had no effect on lake utilization by broods, ducklings and non-breeding adults (cumulative days over the entire breeding season). Abundance of invertebrate prey differed greatly among lakes, but it did not correlate with breeding success. Breeding success was thus subject to sequential density-dependence; i.e. a lower number of broods still produced the same number of 2+ ducklings. We speculate that predation is the most likely process behind both patterns. We conclude that late and snapshot measures of duckling productivity may mask density dependent population processes of fundamental importance to regulation and harvest policy.

  • 141.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Forskningsmiljön Man and Biosphere Health (MABH).
    Gunnarsson, Gunnar
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Forskningsmiljön Man and Biosphere Health (MABH).
    Nummi, Petri
    Pöysä, Hannu
    Sjöberg, Kjell
    Farligt att vara andägg2002In: Svensk jakt, ISSN 0039-6583, Vol. 140, no 10, p. 18-20Article in journal (Other (popular science, discussion, etc.))
  • 142.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Gunnarsson, Gunnar
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Pöysä, Hannu
    Finland.
    Sjöberg, Kjell
    SLU, Umeå.
    Nummi, Petri
    Finland.
    Within-season sequential density dependence regulates breeding success in mallards Anas platyrhynchos2005In: Oikos, ISSN 0030-1299, E-ISSN 1600-0706, Vol. 108, p. 582-590Article in journal (Refereed)
    Abstract [en]

    Density dependence in vital rates is a key issue in population ecology but remains largely unexplored experimentally. We studied breeding success, lake use, and prey availability in wild mallards Anas platyrhynchos on small nemoral lakes in a replicated, two-year cross-over experiment in which pair density was increased. The number of wild mallards that settled on lakes prior to introductions of extra pairs did not differ between control and introduction years. Introductions led to a lake-level reduction in the number of broods observed. However, the number of stage 2/ (almost fledged) ducklings did not differ between treatments, nor did lake utilization by nonbreeding adults, broods and ducklings. Prey resource availability differed greatly among lakes, but it did not correlate with breeding success. Partialling out the possible effect of food competition from wild adult nonbreeding mallards did not change this conclusion. Our study demonstrates sequential density dependence in breeding success; introductions caused a decrease in brood number, but despite fewer broods a similar number of nearly fledged ducklings were produced. We suggest that predation and/or lake change of broods soon after hatching created these patterns. We conclude that using a single and late measure of breeding success such as fledged birds can mask regulatory processes. Implications of density dependence and its relation to individual reproductive success are understood better if breeding success is decomposed into nest success, duckling survival and fledgling survival.

  • 143.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Research environment Man and Biosphere Health (MABH).
    Gunnarsson, Gunnar
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Research environment Man and Biosphere Health (MABH).
    Waldenström, Jonas
    Latorre-Margalef, Neus
    Olsen, Björn
    Vart tog fågelinfluensan vägen?2010In: Vår fågelvärld, Vol. 69, no 3, p. 8-12Article in journal (Other (popular science, discussion, etc.))
  • 144.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Forskningsmiljön Man and Biosphere Health (MABH).
    Hagman, Mattias
    Stockholms universitet.
    Löwenborg, Kristin
    Stockholms universitet.
    Kärvemo, Simon
    Sveriges lantbruksuniversitet, Uppsala.
    Snokens barnkammare försvinner2013In: Fauna och flora : populär tidskrift för biologi, ISSN 0014-8903, Vol. 108, no 1, p. 10-16Article in journal (Other academic)
  • 145.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Research environment Man and Biosphere Health (MABH).
    Hessel, Rebecca
    Fox, Anthony David
    Department of Bioscience, Aarhus University.
    Dalby, Lars
    Department of Bioscience, Aarhus University.
    Interpreting seasonal range shifts in migratory birds: a critical assessment of 'short-stopping' and a suggested terminology2014In: Journal of Ornithology = Journal fur Ornithologie, ISSN 0021-8375, E-ISSN 1439-0361, Vol. 155, no 3, p. 571-579Article, review/survey (Refereed)
    Abstract [en]

    The term 'short-stopping' is increasingly used in ecology to describe spatio-temporal changes in occurrence of migratory species. Spurred by the insight that it has been used in a variety of contexts, we reviewed its use in avian ecology. A literature search yielded 59 papers explicitly treating short-stopping in birds, most of them in peer-reviewed journals. The term was first used in 1967 to describe a northward shift in wintering Canada Geese in North America and has been used with increasing frequency to the present day. Geese dominate the short-stopping literature, which is confined to the northern hemisphere. Short-stopping has been used to describe (1) a shortened autumn migration that results in a wintering distribution closer to breeding areas, (2) a shortened spring migration that results in a breeding distribution closer to wintering areas, and (3) a delay in autumn migration that leads to a perceived reduced abundance in some part of the winter range. We advocate that short-stopping should be used only to describe (1) range shifts that involve shortening of the migratory corridor, and that they are qualified explicitly by season (i.e. breeding/winter) and degree (i.e. full or partial range shift). In other cases of breeding, wintering or entire range shifts where the migratory corridor is elongated or remains the same, we recommend using the term 'range shift', qualified by season, geography and orientation (i.e. the direction of the range shift). We also discuss the need for spatially explicit avian count monitoring mechanisms (rather than capture-recapture or hunting bag data) designed specifically to track such changes in distribution in the future.

  • 146.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Hirschfeld, E
    Svensk fågelrapportering: bra måste bli bättre!2005In: Vår fågelvärld, ISSN 0042-2649, Vol. 64, no 8, p. 36-37Article in journal (Other (popular science, discussion, etc.))
  • 147.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Forskningsmiljön Man and Biosphere Health (MABH).
    Hirschfeld, Erik
    Cardoso, Helder
    Diurnal seabird movements at Cabo Carvoeiro (Peniche, Portugal): observations in early October 20122013In: Seabird, ISSN 0267-9310, Vol. 26, p. 24-30Article in journal (Refereed)
    Abstract [en]

    The ecology and movements of seabirds are still inadequately understood, mainly because they can rarely be studied efficiently from land. The potential of Cabo Carvoeiro (Peniche, Portugal) for monitoring seabird movements from land is poorly known internationally, as few results from this site have been published in English. Here we present data from standardised counts in October 2012 and draw attention to recent organised seabird counts in Portugal. Despite unfavourable weather conditions for concentrating seabirds towards land, we observed a strong passage of Northern Gannet   Morus bassanus, Cory’s Shearwater Calonectris diomedea, Great Skua  Stercorarius skua, and Balearic Shearwater Puffinus mauretanicus (mean morning passage of 252, 99, 19, and 21 birds / hour, respectively). Manx Shearwater Puffinus puffinus, Sooty Shearwater P. griseus and Great Shearwater P. gravis occurred regularly in low numbers. Extrapolation indicates that thousands of seabirds passed daily within a few kilometres from land. The high counts of some species and the fairly high species diversity observed by us and in the RAM (Rede de observação de Aves e Mamiferos marinhos) initiative show that Cabo Carvoeiro is an outstanding site for monitoring and studying seabirds in the eastern Atlantic, as it is also located further south in the flyway than most other seawatch points. We hope this note will inspire ornithologists from other countries to participate in standardised seabird counts at Cabo Carvoeiro and other Portuguese sites.

  • 148.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Research environment Man & Biosphere Health (MABH).
    Hirschfeld, Erik
    Cardoso, Helder
    Portugal.
    Hessel, Rebecca
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap. Kristianstad University, Research environment Man & Biosphere Health (MABH).
    Passage patterns of seabirds in October at Cabo Carvoeiro Portugal, with special reference to the Balearic Shearwater Puffinus mauretanicus2016In: Marine Ornithology, ISSN 1018-3337, E-ISSN 2074-1235, Vol. 44, no 2, p. 151-156Article in journal (Refereed)
    Abstract [en]

    Land-based counts of migrating seabirds remain essential to increase knowledge about their numbers and movements. To assess the value of Cabo Carvoeiro (Peniche, Portugal) as a monitoring site in the East Atlantic, we studied seabird species composition, passage patterns and flock size during mid-October 2014. During standardized counts, we observed nearly 8 000 seabirds of 17 species. The ratio of individuals passing in a southerly to southwesterly direction was >96% in all species, showing that genuine migrants were counted. The passage rate (birds/hour) was higher for Northern Gannets Morus bassanus than for any other species, by a factor of approximately 50 (morning mean 906/h, afternoon mean 1 153/h). The globally endangered Balearic Shearwaters Puffinus mauretanicus, Great Skuas Stercorarius skua and Pomarine Skuas S. pomarinus had passage rates of 10–25/h. Flock size distribution in the 11 most numerous species showed that most migrated singly or in groups of two. Flock size was larger in Balearic Shearwaters than in both Cory’s Calonectris borealis and Manx Shearwaters P. puffinus. Among skuas, flock size was larger in Pomarine than in Great Skuas. The passage rate of Manx Shearwaters was positively correlated with that of Northern Gannets, Great Skuas and Sandwich Terns Sterna sandvicensis. Northern Gannets showed a positive co-variation with Pomarine Skuas. Balearic and Sooty Shearwaters Ardenna griseus were the only species that did not show any significant co-variation with another species. Morning and afternoon passage rates did not differ significantly in any of the six most numerous species (Northern Gannets, Cory’s and Balearic Shearwaters, Great and Pomarine Skuas, and Sandwich Terns), or in Sooty Shearwaters (less numerous). Thus, the passage rates at Cabo Carvoeiro in October of Balearic Shearwaters and five other species were as high or higher than those reported from any other seawatch in Portugal, indicating the international value of seabird monitoring at Cabo Carvoeiro during the autumn migration.

  • 149.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Lindberg, N
    Edenius, L
    Vart tog de vägen?: en översikt av återfynd av fåglar ringmärkta på Stora Fjäderägg2005In: Fåglar i Västerbotten, ISSN 0348-1166, Vol. 30, no 4, p. 4-9Article in journal (Other (popular science, discussion, etc.))
  • 150.
    Elmberg, Johan
    et al.
    Kristianstad University, School of Education and Environment, Avdelningen för Naturvetenskap.
    Müller, Lothar
    The first records of grey-headed gull Larus cirrocephalus in Egypt2003In: Sandgrouse, ISSN 0260-4736, Vol. 25, no 1, p. 67-68Article in journal (Refereed)
1234567 101 - 150 of 695
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