A5044366725- Animal Ecology and Behavior Studies
- Plant and animal studies
- Ecology and Vegetation Dynamics Studies
- Evolution and Genetic Dynamics
- Evolutionary Game Theory and Cooperation
- Wildlife Ecology and Conservation
- Animal Behavior and Reproduction
- Mathematical and Theoretical Epidemiology and Ecology Models
- Avian ecology and behavior
- Ecosystem dynamics and resilience
- Genetic diversity and population structure
- Marine and fisheries research
- Oceanographic and Atmospheric Processes
- Microbial Community Ecology and Physiology
- Adipose Tissue and Metabolism
- Species Distribution and Climate Change
- Fish Ecology and Management Studies
- Chemical Safety and Risk Management
- Genomics and Phylogenetic Studies
- Economic and Environmental Valuation
- Growth Hormone and Insulin-like Growth Factors
- Genetic and phenotypic traits in livestock
- Climate variability and models
- Occupational Health and Safety Research
- Arctic and Antarctic ice dynamics
Lund University
2008-2024
Stockholm University
1980-2013
Länssjukhuset i Kalmar
2009
National Center for Ecological Analysis and Synthesis
2002-2005
Tallinn University of Technology
2005
Institut de Biologia Evolutiva
2004
University of Glasgow
2004
University of Helsinki
1997-2004
Trelleborg (Sweden)
2003
State Street (United States)
2003
Abstract Because of their small size, great abundance and easy dispersal, it is often assumed that marine planktonic microorganisms have a ubiquitous distribution prevents any structured assembly into local communities. To challenge this view, bacterioplankton communities from coastal waters at nine locations distributed world‐wide were examined through the use comprehensive clone libraries 16S ribosomal RNA genes, used as operational taxonomic units (OTU). Our survey analyses show there...
In conservation biology it is necessary to make management decisions for endangered and threatened species under severe uncertainty. Failure acknowledge treat uncertainty can lead poor decisions. To illustrate the importance of considering uncertainty, we reanalyze a decision problem Sumatran rhino, Dicerorhinus sumatrensis , using information‐gap theory propagate uncertainties rank options. Rather than requiring information about extent parameter at outset, addresses question how much be...
Ecological and evolutionary change is generated by variation in individual performance. Biologists have consequently long been interested decomposing measured at the population level into contributions from individuals, traits they express alleles carry. We present a novel method of estimating to growth changes distributions quantitative alleles. An individual's contribution an realized annual fitness. demonstrate how quantities we develop can be used address range empirical questions,...
To examine the interactions between acute exercise and GH on markers of bone collagen turnover to assess potential for detecting abuse in athletes using these markers, we studied 17 aerobically trained males (age, 26.9 ± 1.5 yr). Sequential studies exercise, administration, withdrawal were undertaken. A randomized, controlled study rest vs. showed that did not change serum osteocalcin; other formation increased transiently (each P < 0.001): bone-specific alkaline phosphatase (+16.1%),...
1 Introduction.- 1.1 Objectives.- 1.2 Topics to be Covered.- 1.3 Predator-Prey Dynamics.- 1.4 Competition.- 1.5 Summary.- 2 Diet Selection.- 2.1 Nutrient-Maximizing Diets.- 2.1.1 Experimental Evidence for Optimal 2.1.2 Partial Preferences.- 2.1.3 Selection and the Functional Response.- 2.1.4 Tests of 2.1.5 Choice Population 2.2 Evolutionary Dynamics 2.3 Balanced Nutrient 2.3.1 2.3.2 Diets 2.4 3 Prey Defense.- 3.1 Types Defenses.- 3.2 Defense Effects Parameters.- 3.3 Parameter on 3.4 Time...
Ecology is a leading discipline in the synthesis of diverse knowledge. Ecologists have had considerable experience bringing together diverse, multinational data sets, disciplines, and cultural perspectives to address wide range issues basic applied science. Now time build on this foundation invest ecological through new national or international programs. While takes place many mechanisms, including individual efforts, working groups, research networks, centers are extraordinarily effective...
A bacterial community may be resistant to environmental disturbances if some of its species show metabolic flexibility and physiological tolerance the changing conditions. Alternatively, can change composition thereby potentially affect ecosystem processes. The impact disturbance on bacterioplankton communities was examined in continuous seawater cultures. Bacterial assemblages from geographically closely connected areas, Baltic Sea (salinity 7 high dissolved organic carbon [DOC]) Skagerrak...
We examine the evolutionary stability of year-round residency in territorial populations, where breeding sites are a limiting resource. The model links individual life histories to population-wide competition for territories and includes spatial variation habitat quality as well potential parent-offspring conflict over territory ownership. general form makes it applicable evolution dispersal, migration, partial delayed dispersal (offspring retention). show that migration can be...
In this article we develop a game-theoretical approach to the study of evolutionarily stable partial migration, applicable both deterministic and stochastic population models. We assume that migration is related overwintering strategies animals: fraction overwinters locally, while another migrates other sites. show may arise owing density-dependent survival environmental uncertainty does not need be assumed. also that, when there are differences in reproductive successes between migratory...
Empirical studies have shown that animal populations from a wide array of taxa exhibit spatial patterns correlation in fluctuating abundance. In the search for explanations this phenomenon it has been proposed subpopulation interactions form dispersal, or variability external factors, such as weather, would be crucial driving forces responsible synchrony. Nevertheless, dispersal and factors to produce different We show here observed synchronous dynamics can reproduced by using spatially...
The probability that an individual plant will be attacked by a herbivore depends not only on the characteristics of plant, but also quality and abundance its neighbours. However, plants have been reported to receive protection from herbivory both when associated with higher lower palatability (the attractant-decoy repellent-plant hypotheses, respectively), there are no mechanistic explanation for these different outcomes spatial association. We used patch-use theory (marginal-value theorem)...
Theoretical research into the dynamics of coupled populations has suggested a rich ensemble spatial structures that are created and maintained either by external disturbances or self-reinforcing interactions among populations. Long-term data Canadian lynx from eight provinces display large-scale synchrony in population fluctuations. The synchronous not time-invariant, however, as pairs initially step may drift out phase back phase. These observations agreement with predictions...
Foraging decisions by large herbivores in a heterogeneous environment with several available plant species are scale problem. If, for example, the foraging primarily occur at stand level, then stands of trees might be regarded as patches within habitat over which intake rate is to maximized. The food consumption should proportion availability different types. on other hand, selection occurs tree level stand, individual "patches"; total exploitation result made stand. We tested these two...
Circulating GH consists of multiple molecular isoforms, all derived from the one gene in nonpregnant humans. To assess effect a potent stimulus to pituitary secretion on we studied 17 aerobically trained males (age, 26.9 ± 1.5 yr) randomized, repeat measures study rest vs. exercise. Exercise consisted continuous cycle ergometry at approximately 80% predetermined maximal oxygen uptake for 20 min. Serum was assayed total, pituitary, 22-kDa, recombinant, non-22-kDa, 20-kDa, and immunofunctional...
Recent climate change has sparked an interest in the timing of biological events, which is a general problem life-history evolution. Reproduction many organisms breeding seasonal environments, e.g. migratory birds, dependent on exploitation short but rich food supply. If peak advances owing to change, then one would expect bird track those changes, hence, initiate migration and earlier. However, when there competition for territories risk pre-breeding mortality, optimal response shifting...
We examine the effects of environmental noise on populations that are parts simple two-species food webs. assume species strongly interacting and one or other population is affected by signal. Further assuming a stable equilibrium with positive densities exists, we able to perform complete frequency analysis system. If only subject noise, relative response both fully determined sign single element Jacobian matrix. The readily extended cases when web has more than two species. general...
Simple models, based on Lotka-Volterra types of interactions between predator and prey, predict that enrichment will have a destabilizing effect populations equilibrium population densities change at the top trophic level every second below. We experimentally tested these predictions in three aquatic food web configurations subjected to either high or low nutrient additions. The results were structured by viewing systems as chains webs showed biomass increased with enrichment, which...