The use of molecular techniques in insect ecology has expanded rapidly, allowing ever morechallengingquestions tobeaddressed.Comparedto their abovegroundequivalents, root herbivoremolecular ecology has received less attention, despite essentially the same ecological questions being of importance in both the aboveand belowground ecosystems. Studies so far have concentrated on economically import...

The success of genetic-control programmes aimed at introducing genes into wild Anopheles gambiae populations depends on our understanding of the genetic structure of these populations. Population-genetic studies are required for identifying discrete population groups across Africa, determining their geographical distribution and evaluating the degree to which they may be reproductively isolated...

The paper presents an agent based model of the Aedes aegypti mosquito, which considers mosquito population dynamics and a speci c population control strategy, as well the dengue propagation in mosquito (vector) and human (host) populations. More speci cally, this study concerns the impact that the RIDL strategy (Release of Insects carrying a Dominant Lethal gene) has on the infection period amo...

JOHAN EHRLÉN,* KIMMO SYRJÄNEN,† ROOSA LEIMU,‡ MARIA BEGOÑA GARCIA§ and KARI LEHTILĶ * Department of Botany, Stockholm University, SE-10691 Stockholm, Sweden; † Finnish Environment Institute, Division of Nature and Land Use, Species Protection Unit, FIN-00251, Helsinki, Finland; ‡ Section of Ecology, Department of Biology, University of Turku, FIN-20014 Turku, Finland; § Instituto Pirenaico de ...

In recent years it has been increasingly recognized that noise and determinism may have comparable but different influences on population dynamics. However, no simple analysis methods have been introduced into ecology which can readily characterize those impacts. In this paper, we study a population model with strong periodicity and both with and without noise. The noise-free model generates bo...

ui(x, 0) = ui (x), x ∈ Ω and what the analysis of such equations can say about spatial ecology. Here, ui(t, x) denotes the spatial density of some diffusing population at time t, ui denotes its initial density, and fi denotes the specific growth rate of the i-th population, which may depend on location and on the densities of the other n populations at that location. For reasons discussed exten...

Biologists often examine large and diverse populations of organisms (for example, molecules, microbes or plants). This is particularly the case in fields such as microbial ecology, which studies the interactions between living microorganisms (such as algae, or bacteria) and their environment. One of the most significant and challenging problems in these areas of biology is to compare the specie...