Graphics Library >> Vital Water Graphics 2 >> Planet index 2007 for marine ...

Planet index 2007 for marine species population

Planet index 2007 for marine species population

File type Download Size Language
.eps .eps Download 146 kb -
.jpg .jpg Download 211 kb -
Uploaded 16 Feb 2012 by GRID-Arendal
Year: 2009
From collection: Vital Water Graphics 2
Author: GRID-Arendal
Description:
The Marine Species Population Index provides an assessment of the average changeover time in the populations of 217 species of marine mammals, birds, reptiles, and fish. The index represents the average value of six regional ocean indices. More pronounced declines are seen in the southern oceans, attributed to the fact that major losses and degradation of marine ecosystems in the industrialized world took place prior to 1970. Marine species are generally more difficult to monitor than terrestrial ones. Assessments are therefore based primarily on fishery catches, and the monitoring of land breeding species (e.g. turtles, birds and seals). However, these species are over-represented in the index, which should have a far greater proportion of invertebrate species.
Downloads: 189     Rating: 3
  • Suspended sediment discharge
  • Nitrate levels: concentrations at river mouths
  • Lake Chad: almost gone
  • Water Scarcity Index
  • Renewable surface water produced internally
  • Who will not reach the water and sanitation millennium development goal?
  • Total population: access to an improved water source
  • Industrial areas and seasonal zones of oxygen depleted waters