Search for dissertations about: "blooms"

Showing result 1 - 5 of 97 swedish dissertations containing the word blooms.

2. 1. Causes and consequences of Gonyostomum semen blooms

   Author : Karla Münzner; Eva S. Lindström; Lars J. Tranvik; Gesa A. Weyhenmeyer; Silke Langenheder; Ann-Kristin Bergström; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Gonyostomum semen; algal blooms; brown water lakes; lake browning; iron; dissolved organic carbon DOC ; carbon cycling; pCO2; CO2; organic matter; sedimentation; Biology with specialization in Limnology; Biologi med inriktning mot limnologi;

   Abstract : Aquatic ecosystems provide essential ecosystem services, but are also highly vulnerable to global change. Climate change, eutrophication and browning, for example, collectively drive the increase of harmful algal blooms in freshwaters. READ MORE

4. 2. Detection, transfer and role of an environmentally spread neurotoxin (BMAA) with focus on cyanobacteria and the Baltic Sea region

   Author : Lotta Berntzon; Birgitta Bergman; Geoffrey Codd; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; β-N-methylamino-L-alanine; BMAA; cyanobacteria; Baltic Sea; blooms; neurotoxin; neurodegenerative diseases; amyotrophic lateral sclerosis; ALS; nitrogenase; nitrogen fixation; Plant Physiology; växtfysiologi;

   Abstract : β-N-methylamino-L-alanine (BMAA) is one of the more recently discovered bioactive compounds produced by cyanobacteria. BMAA is a non-protein amino acid reported present in human brain tissues of patients deceased from a neurodegenerative disease, such as Alzheimer´s disease or amyotrophic lateral sclerosis (ALS). READ MORE

5. 3. Benthic use of phytoplankton blooms: uptake, burial and biodiversity effects in a species-poor system

   Author : Agnes M. L. Karlson; Ragnar Elmgren; Carlo Heip; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; biodiversity; ecosystem functioning; benthic-pelagic coupling; niche; resource partitioning; competition; eutrophication; cyanobacterial blooms; diatoms; invasive species; Baltic Sea; Marine ecology; Marin ekologi; Marine Ecology; marin ekologi;

   Abstract : Animals living in marine sediments (the second largest habitat on earth) play a major role in global biogeochemical cycling. By feeding on organic matter from settled phytoplankton blooms they produce food for higher trophic levels and nutrients that can fuel primary production. READ MORE

6. 4. From genes to blooms : Diversity in microcystin phenotypes and mcy biosynthesis genes in the cyanobacterium Microcystis

   Author : Emma Johansson; Enhet akvatisk ekologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; limnologi; algblomning; cyanobakterier; cyanotoxiner; limnology; cyanobacterial blooms; cyanotoxins;

   Abstract : Cyanobacterial blooms are increasing in occurrence and frequency world-wide, mainly due to eutrophication and increased water temperatures. In freshwater, Microcystis is one of the most common bloom-forming genera, renowned for producing the toxin microcystin which is harmful to humans and other mammals. READ MORE

7. 5. Summer cyanobacterial blooms in the Baltic Sea - implications for copepod recruitment

   Author : Hedvig Hogfors; Sture Hansson; Wim Kimmerer; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Cyanobacteria; Calanoid copepods; Food web interactions; Harmful algae blooms; Zooplankton; Nodularin; Allelopathy; Baltic Sea; Biochemical markers; RNA-based indices; Acidification; Global Climate Change; Marine Ecology; marin ekologi;

   Abstract : During summer, the Baltic Sea is subjected to the world’s largest cyanobacterial blooms. These blooms are linked to eutrophication and raise many questions concerning their effects on the ecosystem. To understand their impacts on the food web dynamics, it is essential to assess growth responses of grazers to these cyanobacteria. READ MORE