Non-native aquatic plants can alter the physiochemical condition of habitats and have negative ecological economic impacts. Thus, understanding characteristics non-native plant species is important as a foundation for conservation biodiversity environmental management. The yellow flag (Iris pseudacorus) an emergent native to Africa, northwest Asia, Europe that has been introduced through aquari...

Abstract Yellow-flag iris ( Iris pseudacorus L.) is a nonnative, invasive wetland plant that disrupts riparian ecosystem processes and widely distributed across the United States Canada. Due to its physiological morphological characteristics, I. has capacity exclude native vegetation form extensive monocultures in both lotic lentic systems. Methods commonly used manage include manual (e.g., han...

We conducted an intercontinental biogeographic survey to analyze the effects of invasive plant species in its native and invaded ranges. Our study system included tidal wetlands colonized by Iris pseudacorus L. (yellow flag iris, Iridaceae) along salinity gradients two estuaries European (Guadalquivir Estuary) North American (San Francisco Bay-Delta hypothesized I. would impart more negative co...

BACKGROUND Despite its high prevalence, most acute low back pain (ALBP) is nonspecific, self-limiting with no definable pathology. Recurrence is prevalent, as is resultant chronicity. Psychosocial factors (yellow flags comprising depression and anxiety, negative pain beliefs, job dissatisfaction) are associated with the development of chronic LBP. METHODS A national insurer (Accident Compensa...

! Gilbert Baker designed the rainbow flag for the 1978 San Francisco's Gay Freedom Celebration. In the original eight-color version, pink stood for sexuality, red for life, orange for healing, yellow for the sun, green for nature, turquoise for art, indigo for harmony and violet for the soul.! First unveiled on 12/5/98 the bisexual pride flag was designed by Michael Page. This rectangular flag ...