Search for dissertations about: "media ecology"

Showing result 1 - 5 of 34 swedish dissertations containing the words media ecology.

  1. 1. The significance of sexuality and cyst formation in the life-cycles of four marine dinoflagellate species

    University dissertation from Lund University

    Author : Rosa Figueroa; Lunds universitet.; Lund University.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; cyst; Hydrobiology; akvatisk ekologi; marine biology; aquatic ecology; limnology; sexuality.; meiosis; Lingulodinium polyedrum; life-cyle; limnologi; Marinbiologi; Gymnodinium nolleri; Gymnodinium catenatum; Alexandrium catenella; dinoflagellates;

    Abstract : Sexuality and cyst formation were studied in the marine dinoflagellate species Gymnodinium catenatum Graham, Gymnodinium nolleri Ellegaard ? Moestrup, Alexandrium catenella (Whedon et Kofoid) Balech, and Lingulodinium polyedrum (Stein) Dodge. The study included the morphological characterization of sexual stages and processes, the time and description of meiosis, the study of the length and regulation of the mandatory dormancy period of resting cysts, and the relationships among parental strains and cyst progeny at phenotypic and molecular levels. READ MORE

  2. 2. Zooplankton response to cyanotoxins

    University dissertation from Limnology, Department of Ecology, Lund University

    Author : Susanne Gustafsson; Lunds universitet.; Lund University.; [2007]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Naturvetenskap; Natural science; cyanotoxins; maternal effects; algal toxins; zooplankton; tolerance; cyanobacteria;

    Abstract : Popular Abstract in Swedish Giftiga alger - kan man äta sånt?! En sammanfattning på svenska Varje sommar varna's vi för giftiga algblomningar i media. Rapporterna brukar ofta handla om havet men många insjöar, speciellt i Skåne, drabba's också av massförekomst av alger. READ MORE

  3. 3. Ecology of zooplankton communities: climate, dormancy, and benthic-pelagic coupling

    University dissertation from Mikael Gyllström, Limnology, Ecology Building, S-223 62, Lund, Sweden

    Author : Mikael Gyllström; Lunds universitet.; Lund University.; [2003]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Marinbiologi; limnologi; akvatisk ekologi; limnology; Hydrobiology; marine biology; aquatic ecology; phytoplankton; temporal stability; recruitment; seasonal succession; environmental cues; diapause; shallow lakes; predation; enrichment; climate; temperature;

    Abstract : Popular Abstract in Swedish Hur påverkas djurplanktonsamhällen av klimatförändringar och vilken betydelse har vilostadier? Populärvetenskaplig sammanfattning av “Ecology of zooplankton communities: climate, dormancy and benthic-pelagic coupling”, doktorsavhandling i Limnologi vid Ekologiska institutionen, Lunds Universitet, 2003. Djurplankton är sjöars motsvarighet till betande kossor och de mikroskopiska alger de äter utgör gräset—sjöns gröna (och flytande!) äng. READ MORE

  4. 4. Ecology of parasitoids and their hosts in oilseed rape fields

    University dissertation from Media-Tryck, Lund University, Sweden

    Author : Josef Berger; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; parasitoids; herbivores; oilseed rape; pollen beetle; cabbage stem weevil; parasitoid community; niche separation; landscape scale; community composition; landscape configuration; Species abundance distribution SAD models; dispersal; metacommunity;

    Abstract : Oilseed rape fields are a very common crop in the agricultural landscape of southern Sweden, and they can harbour surprisingly many insect species. Some of them are herbivores that feed on various parts of the oilseed rape plant, others are natural enemies of the herbivores, and even more species are tourists from the surrounding landscape. READ MORE

  5. 5. On the Effects of Blood Parasites in Wild Birds

    University dissertation from Uppsala : Institutionen för ekologi och genetik

    Author : Peter Halvarsson; Uppsala universitet.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Atoxoplasma; avian malaria; coccidia; Gallinago media; Haemoproteus; Leucocytozoon; parasite prevalence; Passer montanus; Plasmodium; recapture mod-els; survival; Biologi med inriktning mot populationsbiologi; Biology with specialization in Population Biology;

    Abstract : Coccidian and haemoatozoan parasites are commonly occurring endo-parasites in wild birds and prevalence can vary among species and populations. In addition to prevalence studies, parasites are often used to investigate effects on life history traits. READ MORE