نتایج جستجو برای: food enrichment
تعداد نتایج: 311098 فیلتر نتایج به سال:
We propose a simple model of an ecological foodchain of arbitrary length. The model is very general in nature and describes a whole class of foodchains. Using the methods of qualitative analysis the model’s stability can be analyzed without restricting the predator-prey interaction to any specific functional form. The model can therefore be used to study the effect of different functional forms...
Clostridium difficile is an important bacterial pathogen of humans and a variety of animal species, where it can cause significant medical problems. The major public health concern is the possibility of inapparent animal reservoirs of C. difficile and shedding of bacteria to noninfected individuals or populations, as well as being a source of food contamination. Migrating birds can be a key epi...
Anthropogenic alterations of nutrient inputs and food-web structure are two of the primary stressors affecting lake phytoplankton. This paper explores the independent and interactive effects of nutrients and food-web structure (as indexed by zooplankton size) on phytoplankton size structure by fitting time-series models to data from three lakes where both factors have been manipulated. I assess...
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