Page 1 of 1 - About 6 Essays
  • Negative Effects Of Bottom Trawling

    Bottom trawling is a high-efficiency fishing technique in global coastal fisheries [1], but with negative effects on marine benthos [2]. Bottom trawling affects seabed environments by dragging a net on the seabed and suspending sediments [3]. In addition, this fishing activity threatens marine benthic biodiversity and destroys the structures of benthic ecosystems [4]. Fishers have been concerned with these impacts for 600 years [5]. Over the past half century, the impacts of bottom trawling have come to the forefront for scientists and governments [5,6]. To reduce the negative effects on benthic ecosystems from bottom trawling, the European Union has used a Vessel Monitoring System (VMS) to monitor the activities of all vessels greater than…

    Words: 1117 - Pages: 5
  • Mohawk River Watershed

    An example of this, according to Raven, Berg and Hassenzahl, is “an organism in an environment” (43). Phytoplankton, Zooplankton and Benthos are all living or biotic organisms this study examined in the starch factory stream. Phytoplankton are, according to Raven, Berg and Hassenzahl, “free-floating photosynthetic algae and cyanobacteria that form the base of most aquatic food webs” (124). Phytoplankton is green when examined in a microscope while zooplankton is not. Zooplankton are defined as…

    Words: 899 - Pages: 4
  • The Effects Of Overfishing And Overexploitation Of Fishery Species

    Furthermore, fisheries are noticing declines in the abundance and variety of the fish and invertebrates that are harvested. This is not only due to overexploitation but also physical and ecological damage to the fishery environment (NOAA, 1998). In fact, fisheries or the commercial harvesting of fish and shellfish is by far the most destructive force in the oceans today. The environmental impact of which may vary from being “easily reversible, difficult to reverse or irreversible” (FAO, 2015).…

    Words: 1214 - Pages: 5
  • River Continuum Concepts

    flow, but are usually not as shallow as riffles and white-capping is also not predominant. This area of the stream is home to organisms which need water with higher oxygen content, but can’t handle the velocity found within a riffle. Pools follow runs and their name describes them perfectly. Pools are deep areas of the stream with low flow levels. They are also usually the most oxygen depleted area of the stream since not much atmospheric diffusion is occurring here. Pools are used by aquatic…

    Words: 1116 - Pages: 5
  • Aquaculture Issues

    not contribute to the poor state of wild salmon fishing and conservation. However, the mismanagement in the salmon capture and destruction of habitat contributes to wide-scale depletion of both Pacific and Atlantic salmon. Contamination Ideal salmon farming is located in marine ecosystems served by sufficient and high water quality, exchange rate, and fast currents to prevent pollution at the sea bottom. The sea cages should be deep enough and therefore prevent damage during heavy storms. The…

    Words: 1566 - Pages: 7
  • The Effects Of CO2 On The Oceans

    reefs decline, so do a wide range of populations and species. Although carbon dioxide levels are naturally increasing in the oceans, studies are being done on the idea of taking CO2 from the atmosphere and actually pumping it into the deep ocean for disposal. In one report Environmental Impacts of Ocean Disposal of CO2 (Herzog and Adams, 1994) they surmise that the most important consequence would be the acidification of the water around the release point. As part of their observations, they…

    Words: 1736 - Pages: 7
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