Scientists and managers have become increasingly interested in how pelagic marine protected areas (PMPAs), or protected areas away from the coast, can be used to protect pelagic species. Subsurface-predator facilitated foraging (‘facilitated foraging’) between seabirds and subsurface predators, such as tunas, is a key ecological interaction in the tropical oceans where a number of large PMPAs h...

Plant recruitment in nature exhibits several distinctive patterns ranging from hump shaped to monotonically decreasing with distance from the seed source. We investigate the role of postdispersal seed predation in shaping these patterns, introducing a new mechanistic model that explicitly accounts for the movement strategy used by seed eaters. The model consists of two partial differential equa...

introduction & objective:visceral leishmaniasis (kala azar), a systemic infectious and life threatening disease of childhood, can be easily diagnosed and treated provided that there is enough knowledge about it otherwise, 90 –95% of patients may die due to severe, acute complications such as bleeding and opportunist infections. following the incubation period and onset of clinical manifestation...

The abundance of predators and their impact on ecosystem dynamics is a vividly discussed topic in current ecology. In my studies, incorporating field observations, field experiments and theoretical modeling, I explored the importance of predators and predation in a low arctic tundra ecosystem in northern Norway. This involved observing the abundance and spatial activity of predators (raptors an...

Large reductions in the abundance of exploited land predators have led to significant range contractions for those species. This pattern can be formalized as the range-abundance relationship, a general macroecological pattern that has important implications for the conservation of threatened species. Here we ask whether similar responses may have occurred in highly mobile pelagic predators, spe...

BACKGROUND Insect herbivory induces plant odors that attract herbivores' natural enemies. Assuming this attraction emerges from individual compounds, genetic control over odor emission of crops may provide a rationale for manipulating the distribution of predators used for pest control. However, studies on odor perception in vertebrates and invertebrates suggest that olfactory information proce...

As a consequence of climate change, thermal stratification in lakes strengthens and increases the tendency towards hypolimnetic hypoxia or even anoxia. In the boreal zone, numerous lakes already undergo seasonal hypolimnetic anoxia, but its consequences for the microbial food web (MFW) are still largely unknown. However, the abundance as well as vertical distribution of predators, especially ci...

Jatropha curcas has a high biofuel oil content, which could replace polluting fuels, and has great potential for large scale monoculture cultivation in the conventional system. We explored the occurrence, spatial distribution and the functional response of the main phytophagous species of this plant and their natural enemies to explore the potential for conservative biological control. We began...