Publications by authors named "Jan Landin"
Optical properties of natural photonic structures can inspire material developments in diversified areas, such as the spectral design of surfaces for camouflage. Here, reflectance, scattering, and polarization properties of the cuticle of the scarab beetle Cyphochilus insulanus are studied with spectral directional hemispherical reflectance, bidirectional reflection distribution function (BRDF) measurements, and Mueller-matrix spectroscopic ellipsometry (MMSE). At normal incidence, a reflectance (0.
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- The study examines the effects of diverting stream water into a limed tailings impoundment, looking at both short-term and long-term biogeochemical and ecological changes.
- In the short term, major expected effects include reduced water mixing, increased microbiological activity, and potential pH buffering from calcite dissolution, while stream water will contribute to sediment accumulation.
- Long-term, the impoundment may develop into wetland or peatland ecosystems, ultimately transitioning to a bog lake or similar habitat, contingent on a decrease in pH following the cessation of liming.
When a population experiences temporal changes in the vital rates due to environmental or biotic variation, change is not only expected in the rate of population growth but also in the structure of the population. In this study we present a method for transforming observed patterns (notably how vital rates change with temperature) into functions that can be used in population growth models and analysis of population structure. The method is exemplified by applying it to cohort studies in different constant temperatures of four species of aphids, Lipaphis erysimi (K.
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