Diversity of deep-sea fishes of the Easter Island Ecoregion

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

Grasses (Poaceae) of Easter Island — Native and Introduced Species Diversity

Colonization of the deep sea by fishes

Analysis of maximum depth of occurrence of 11 952 marine fish species shows a global decrease in species number (N) with depth (x; m): log10 N = -0·000422x + 3·610000 (r(2)  = 0·948). The rate of decrease is close to global estimates for change in pelagic and benthic biomass with depth (-0·000430), indicating that species richness of fishes may be limited by food energy availability in the deep...

Academic paediatrics: Easter Island or Easter Sunday?

W hen the last tree on Easter Island was felled, the inhabitants belatedly realised that there was no escape from an eon of ‘‘groundhog days’’. Paediatrics, a discipline championed in the UK, faces a comparably monotonous future bereft of innovation and improvement. Levene and Olver present alarming data on staffing changes in UK academic paediatrics between 1999 and 2004. Most worrying is a 26...

Late colonization of Easter Island.

Easter Island (Rapa Nui) provides a model of human-induced environmental degradation. A reliable chronology is central to understanding the cultural, ecological, and demographic processes involved. Radiocarbon dates for the earliest stratigraphic layers at Anakena, Easter Island, and analysis of previous radiocarbon dates imply that the island was colonized late, about 1200 A.D. Substantial eco...