Plastic accumulating in our oceans and on our beaches has become a global crisis. May 21, 2020 - by Tara Lohan We were able to categorize 12 434 marine species (more than 99% of all marine percomorphs) as present or absent in each region. Billions of pounds of plastic can be found in swirling convergences that make up about 40 percent of the world's ocean surfaces. As opposed to a flat seafloor, seamounts rise off the ocean bottom and interact with water flowing around them. continental shelf. Most of the productivity of the ocean occurs in (on) the _____. Introduction. Each species of organism has its own niche within the ecosystem; if niches overlap, one species will die out as a result of interspecific competition. At current rates plastic is expected to outweigh all the fish in the sea by 2050. Plants and animals have as much difficulty surviving in the thin atmosphere on freezing mountain tops as they do living in hot, waterless deserts. Biodiversity of the oceans. "The World Ocean (Oceanosphere) contains on the order of 1,340.7 million km3 of water, making up 1/800th of the total volume of the Earth (1,083.3 billion km3). Thus, the aquatic or marine biome would have the greatest diversity in a large part due to the size of this biome. As such, these climates support very low biodiversity. However, if we look only at terrestrial biomes, tropical rainforests have the greatest biodiversity. Most data were from the Ocean Biogeographic Information System (OBIS) , augmented using the Global Biodiversity Information Facility (GBIF) and FishBase when needed. On the other extreme, moist, tropical zones like the Amazon rainforest support some of the highest levels of biodiversity in the world. A marine protected area is. Ocean acidification may render most regions of the ocean inhospitable to coral reefs, affecting tourism, food security, shoreline protection, and biodiversity. On some tropical coral reefs, for example, there can be 1,000 species per m². High biodiversity means that many different species live within one ecosystem. ... also have high biodiversity. Almost 300 bird species have been observed at the Dixon Waterfowl Refuge in north-central Illinois, while the restored wetlandâprairie landscape at Midewin National Tallgrass Prairie near Joliet supports some species found almost nowhere else, including federally endangered leafy prairie-clover. What portion of the ocean contains the highest biodiversity and the greatest productivity? In freshwater, these are mainly plants, phytoplankton and zooplankton. Written By Dr. Steven Katona, Managing Director, Ocean Health Index Dr. Bruce Robison may have the best job in the world! ... Oceans have a high heat capacity and change temperature slowly. Coral reefs are the nurseries of the oceans, they are biodiversity hot spots. Narrow niches tend to reduce the extent of overlap and therefore reduce interspecific competition. 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