Testing hypothesis for excess flower production and low fruit-to-flower ratios in a pollinating seed-consuming mutualism

Article Abstract:

A series of experiments were conducted in Arizona to investigate low fruit-to-flower ratios in senita cacti that rely exclusively on pollinating seed-consumers. It was found that pollinator attraction and pollen dispersal increased with flower number, but fruit set did not, refuting the hypothesis that excess flowers increase fruit set by attracting more pollinators.

Science & research, Arizona, Cataract, Plants, Cataracts, Plant reproduction, Pollination

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A general model of site-dependent population regulation: population-level regulation without individual-level interactions

Article Abstract:

Research on population dynamics indicates that average species fecundity per capita and numbers of occupied breeding sites are independent of each other, provided individuals choose sites at random, but that variations in per capita fecundity are driven by declines in sizes of populations.

United States, Statistical Data Included, Models, Environmental aspects, Animal populations, Fertility, Habitat selection

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