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Root hemiparasites acquire resources from neighboring plants’ vascular systems and can limit host growth, depress community productivity, and exert keystone effects. The strength of these effects is posited to be greater where hosts are nutrient-stressed but studies of annual hemiparasites show effects to be short-lived and variable. We conducted a 10-year experiment testing whether fertilizer addition...
Hemiparasitic plants tend to thrive in and significantly affect plant communities in low-nutrient, high-light environments. Hemiparasites are assumed to be weak competitors for light but strong parasites, leading to the prediction that effects on hosts and communities should be a function of resource supply. We investigated the effects of light and mineral nutrients on hemiparasite–host relations...
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