From May to September 2004 a survey of cetacean distribution and relative abundance was conducted on board a 'ship of opportunity' * a vessel used as a survey platform but not chartered for this purpose * off the west coast of Ireland. In total, 508 hours of survey effort were completed, with 304.2 hours in Beaufort sea-state 3 or less. Two hundred and thirty one sightings of eight species* common dolphin Delphinus delphis (L.), Atlantic white-sided dolphin Lagenorhynchus acutus (Gray), bottlenose dolphin Tursiops truncatus (Montagu), harbour porpoise Phocoena phocoena (L.), Risso's dolphin Grampus griseus (Cuvier), pilot whale Globicephala melas (Traill), minke whale Balaenoptera acutorostrata (Lacepede) and fin whale Balaenoptera physalus (L.) * were recorded, totalling 2,933 individuals. The greatest diversity and relative abundance were recorded on the Rockall Bank where Atlantic white-sided dolphin was the most abundant species. The common dolphin was the most abundant species recorded on the continental shelf to the southwest of Ireland, while the relative abundance of cetaceans off the north coast was very low. The data suggest that cetacean species composition and relative abundance can vary greatly between adjacent marine habitat types and over relatively small geographical distances.
The SEG Mission Statement (printed above) captures its evolving role and passion in promoting the profession of geophysics in the 21st century. And as hand in glove, the charge to inspire, connect, and propel the science into new vistas of success and discovery fits perfectly with the Foundation's charter to develop win-win relationships with donors in underwriting new initiatives and sustaining existing programs.
Street trees, as pointed out by many people, are in a vulnerable position in regard to injury from several sources. One of the sources is the practices of people (homeowner, municipal worker or contract applicator) who apply chemicals near these trees. Some of these chemicals are herbicides. Herbicides are designed to act upon a plant's metabolism and, therefore, the expression of this action, or injury symptom, if you will, quite often resembles the result of some other factor such as disease, drought, air pollution or mechanical injury acting on a plant. In order to better understand the potential of this class of injury, an understanding of herbicides currently in use is essential.
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