Chlorophyll Chlorosis can also be caused by pathogens including viruses, bacteria and fungal infections, or sap-sucking insects. Anthocyanins are other plant pigments. The absorbance pattern responsible for the red color of anthocyanins may be complementary to that of green chlorophyll in photosynthetically active tissues such as young "Quercus coccifera" leaves. It may protect the leaves from attacks by plant eaters that may be attracted by green color. The chlorophyll maps show milligrams of chlorophyll per cubic meter of seawater each month. Places where chlorophyll amounts were very low, indicating very low numbers of phytoplankton, are blue. Places where chlorophyll concentrations were
Ronald Spores Ronald Spores Ronald M. Spores (born January 25, 1931) is an American academic anthropologist, archaeologist and ethnohistorian, whose research career has centered on the pre-Columbian cultures of Mesoamerica. He is Professor Emeritus of anthropology at Vanderbilt University's College of Arts and Science, where he has been a faculty member for over four decades. Spores is most renowned for his scholarship conducted on the cultural history of the Oaxacan region in southwestern Mexico. In particular, he has made many contributions on the Mixtec culture, investigating its archaeological sites, ethnohistorical documents, political economies, and ethnohistory in both the pre-Columbian and Colonial eras.