Filtyp
This review focuses on what has been learned about the evolution of photosynthesis in the past five years, and omits evolution of CO2 assimilation. Oxygenic photosynthesis (using both photosystems I and II) has evolved from anoxygenic photosynthesis. The latter occurs in different variants, using either a type 1 photosystem resembling photosystem I, or a type 2 photosystem resembling photosystem I
Several zooplankton species are susceptible to ultraviolet radiation (UV), suggesting that UV may shape zooplankton community composition. Little is known, however, about the quantitative effects of long-term UV exposure in relation to biological processes. Therefore, we studied effects of UV on behaviour, population dynamics and reproduction of several zooplankton taxa. We identified different st
This study reports increasing iron concentrations in rivers draining into the Baltic Sea. Given the decisive role of iron to the structure and biogeochemical function of aquatic ecosystems, this trend is likely one with far reaching consequences to the receiving system. What those consequences may be depends on the fate of the iron in estuarine mixing. We here assess the stability of riverine iron
In order to preserve the variety of life on Earth, we must understand it better. Biodiversity research is at a pivotal point with research projects generating data at an ever increasing rate. Structuring, aggregating, linking and processing these data in a meaningful way is a major challenge. The systematic application of information management and engineering technologies in the study of biodiver
Identifying the relative importance of predation and resources in population dynamics has a long tradition in ecology, while interactions between them have been studied less intensively. In order to disentangle the effects of predation by juvenile fish, algal resource availability and their interactive effects on zooplankton population dynamics, we conducted an enclosure experiment where zooplankt
Eutrophication has been one of the largest environmental problems in aquatic ecosystems during the past decades, leading to dense, and often toxic, cyanobacterial blooms. In a way to counteract these problems many lakes have been subject to restoration through biomanipulation. Here we combine 13 years of monitoring data with experimental assessment of grazing efficiency of a naturally occurring zo
Insect diapause is a pre-programmed alternative developmental pathway induced to survive adverse environmental conditions and is characterized by an absence of development, metabolic suppression and increased stress resistance. While the hormonal regulation of diapause induction has been studied extensively, clear molecular hypotheses on how low-temperature driven diapause termination is controlle
If hedonism is taken to be the view that all and only pleasures are the bearers of intrinsic value whilst also saying that complex things, such as states of affairs, can be ascribed intrinsic value, the hedonic thesis seems to be contradictory. Furthermore it has been argued that the hedonic thesis is inconsistent in its treatment of the notion of intrinsic value in another sense, namely that if t
The end of the Cold War marked the ending of an era of a bipolar rivalry, but it also brought about a new set of challenges for policymakers and national intelligence agencies. One of these new challenges is sharing sensitive information with states and actors outside comfortable alliances, whilst countering a myriad of asymmetric, often low-level type of security threats. Implementation of intell
The aim of this thesis is to examine the effect changes in oil, coal, natural gas and electricity prices have on the stock market. Using a linear regression approach, we study nine market sectors in Sweden and Norway from January 1996 to November 2010. Previous research has in some cases shown that oil prices have a impact on the stock market. We expand this research by including more energy varia
This paper investigates the exchange rate movements for EUR/USD, EUR/SEK and EUR/NOK using an OLS regression. Movements are tested against traditional and nontraditional explanatory variables for exchange rate movements. Traditional variables consists of current account, inflation, productivity and interest rate differentials while the nontraditional are equity returns and risk appetite. Results i
This paper uses an autoethnographic approach to analyze the work of an entrepreneur on a the new venture, AirOhMail, in regards to intellectual property and product protection. By comparing AirOhMail with the failed start-up, SurPrise - both companies attempting to commercialize the same product - this paper demonstrates how a low-level innovation product can better achieve success in the start-up
Aim: Examine the effect of a 10 h intervention programme compared with post-mailed minimal intervention (PMMI) given to high-risk alcohol-drinking university freshmen in a random design. Method: In total 693 freshmen at the Lund Institute of Technology, Lund University, Sweden were included in the study. A cognitive behavioural alcohol program (CBAP) or PMMI was given to high-risk drinking freshme
In recent decades temperature elevation has been the focus of many studies on climate change, including effects on planktonic communities, but few studies have examined the effects of increased water color ("brownification"). Since these changes are likely to occur simultaneously, it is important to investigate their potential interactive effects. Accordingly, we performed a mesocosm experiment wh
Submerged macrophytes play a key role in the functioning of stream ecosystems since they strongly affect the biological and physical environment of the habitat. On the other hand, flow velocity may affect growth and establishment of submerged macrophytes in streams and rivers. However, little attention has been paid to the morphological responses of submerged macrophytes to different stream flows
Migration has evolved as a strategy to maximise individual fitness in response to seasonally changing ecological and environmental conditions. However, migration can also incur costs, and quantifying these costs can provide important clues to the ultimate ecological forces that underpin migratory behaviour. A key emerging model to explain migration in many systems posits that migration is driven b
The aim of this study was to explore the variation and regulation of bacterial carbon processing at a coastal oligotrophic site of the Island of Majorca in the Mediterranean Sea. In situ bacterial production (BP), respiration (BR), growth efficiency, and carbon demand in relation to environmental parameters were studied over an annual cycle. In addition, the response of bacterial carbon processing
The factors that drive partial migration in organisms are not fully understood. Roach (Rutilus rutilus), a freshwater fish, engage in partial migration where parts of populations switch between summer habitats in lakes and winter habitats in connected streams. To test if the partial migration trait is phenotypically plastic or has genetic components, we translocated roach from 2 populations with d
