Search for dissertations about: "Great lakes"

Showing result 1 - 5 of 36 swedish dissertations containing the words Great lakes.

2. 1. Food Quality for Zooplankton in Humic Lakes

   Author : Kelly Gutseit; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; limnology; Hydrobiology; marine biology; Clear water lakes; Plankton; Seston; Elements; Fatty acids; Humic lakes; Food quality; Zooplankton; limnologi; akvatisk ekologi; aquatic ecology; Marinbiologi;

   Abstract : Food quality affects growth, reproduction and community structure of zooplankton, and has implications for nutrient cycling and the transfer of energy and matter in aquatic food chains. While the issue of food quality in clear water lakes has received great recent attention, studies on food quality for zooplankton in humic lakes are scarce. READ MORE

4. 2. Effects of Great Cormorant Predation on Fish Populations and Fishery

   Author : Henri Engström; Sture Hansson; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Great Cormorant; Phalacrocorax carbo sinensis; predation; population regulation; diet; diet preferences; eel; behavioural responses; bird-fishery conflicts; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; populationsbiologi; Population Biology;

   Abstract : The strong increase in number of Great cormorants Phalacrocorax carbo in Sweden in recent years has led to conflicts - particularly with fishery. This thesis focuses on the possible effects of cormorant predation on fish populations. READ MORE

5. 3. The importance of terrestrial carbon in plankton food webs

   Author : Cesar Bolivar Daniel; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Ecology; lakes; carbon; zooplankton; Spumella elongata; Poterioochromonas malhamensis; flagellates; bacteria; stable isotopes; photochemistry; autochthonous; DOC; allochthonous; plankton; Ekologi; Hydrobiology; marine biology; aquatic ecology; limnology; Marinbiologi; limnologi; akvatisk ekologi;

   Abstract : Allochthonous substances, i.e. produced in terrestrial ecosystems, are known to fuel bacterial production in humic lakes. I observed that allochthonous carbon subsidizes bacteria even at high levels of phytoplankton biomass. READ MORE

6. 4. Determining Chlorophyll-a Concentrations in Aquatic Systems with New Statistical Methods and Models

   Author : Peter Dimberg; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chlorophyll-a; statistical models; aquatic systems; lakes;

   Abstract : Chlorophyll-a (chl-a) concentration is an indicator of the trophic status and is extensively used as a measurement of the algal biomass which affects the level of eutrophication in aquatic systems. High concentration of chl-a may indicate high biomass of phytoplankton which can decrease the quality of water or eliminate important functional groups in the ecosystem. READ MORE

7. 5. Origins of Kingship Traditions and Symbolism in the Great Lakes Region of Africa

   Author : Birgitta Farelius; Tord Fornberg; Arvi Hurskainen; Uppsala universitet; []
   Keywords : HUMANIORA; HUMANITIES; interlacustrine; “the religious vision of the world”; the Creator; the first owners of the soil; the white cow; the hammer of smith ; Bigo bya Mugenyi; social stratification; the Bacwezi; the Babiito ideology of statecraft; the Bunyoro centre of creation; History of religion; Religionshistoria;

   Abstract : Considering myth as the bearer of important symbolism with potentials to reveal history, this dissertation undertakes a historical interpretation of kingship traditions and/or myths in the Great Lakes region. While the historical sources describe the cultures of the peoples of the interlacustrine region, this study goes a step further to develop analytic categories using symbolism to interpret and explain the socio-political developments, which previously have been mystified and hence crystallised in theories as the well-known Hamitic theory. READ MORE