Climate change Climate change is a significant and lasting change in the statistical distribution of weather patterns over periods ranging from decades to millions of years. It may be a change in average weather conditions‚ or in the distribution of weather around the average conditions (i.e.‚ more or fewer extreme weather events). Climate change is caused by factors that include oceanic processes (such as oceanic circulation)‚ variations in solar radiation received by Earth‚ plate tectonics and
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Water pollution is the contamination of water bodies (e.g. lakes‚ rivers‚ oceans and groundwater). Water pollution affects plants and organisms living in these bodies of water; and‚ in almost all cases the effect is damaging not only to individual species and populations‚ but also to the natural biological communities. Water pollution occurs when pollutants are discharged directly or indirectly into water bodies without adequate treatment to remove harmful compounds. Contents [hide] • 1 Introduction
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CONTENTS 1. Introduction 2. Impact of Anthropogenic activities on marine environment 3. Degradation of marine environment 4. Pollution of the Marine Environment 5. Classification of marine pollution 6. Effects of Marine pollution 7. International Instruments designed for the protection and preservation of marine environment 8. Possible Mitigative Measures 9. Conclusion 10. References Introduction An extreme range of environmental problems is now the subject of serious international
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Because the valley is able to provide so much‚ in terms of crops‚ perhaps that is the reason why people may want to move there. The poverty rate of those living in the San Joaquin valley‚ about twenty percent‚ was way below the nation’s poverty rate of about fourteen percent. The rate of educated people‚ including adults with a high school diploma‚ is also much lower in this valley. According to the Joint center for political and economic studies San Joaquin Valley place matters team‚ the life expectancy
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Air Pollution * Pollutants enter the air from various sources‚ but burning of fossil fuels contributes the most to air pollution. * Exhaust fumes from vehicles contains soot (tiny carbon particles)‚ lead (from cars using unleaded petrol)‚ carbon monoxide‚ oxides of nitrogen and hydrocarbons due to the incomplete combustion of fossil fuels. * Burning of fossil fuels in the combustion engines of vehicles and electrical power stations also releases large amount of carbon dioxide into the
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ALGAE Algae are eukaryotic organisms that have no roots‚ stems‚ or leaves but do have chlorophyll and other pigments for carrying outphotosynthesis. Algae can be multicellular or unicellular. Unicellular algae occur most frequently in water‚ especially in plankton. Algae are eukaryotic organisms that have no roots‚ stems‚ or leaves but do have chlorophyll and other pigments for carrying out photosynthesis. Algae can be multicellular or unicellular. Unicellular algae occur most frequently in water
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Experiment Hard Clam Juvinles term Toxicity: Introduction: Our testing involves exposing Hard clam juvinle to an interval of AgNo3 concentrations or a test sample for the purpose of determining the concentration or dilution levels that would cause the death of 50% of the organisms (LC50) exposed over 24 h and meeting the conditions defined by this method. If necessary and possible‚ the following may also be determined: a) the concentration level that causes the death of 20 % of organisms exposed
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The Role of Agarase in Agar-Degrading Bacteria Abstract Agar-Degrading (agarolytic) Bacteria is physiological class of bacteria capable of utilising agar as a sole carbon source. This ability is made available by the use of agarases - enzymes which break down agarose into oligosaccharides. This physiological class branches through genii‚ regardless of Gram Stain status or morphology. Through a review of scientific literature we can find identification methods‚ optimum conditions and the
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Analyse the human impacts affecting the nature and rate of change of two ecosystems at risk. All ecosystems are placed under levels of stress that must be withstood or overcome in the form of evolution in order to adapt and survive. These attributes determine the resilience and vulnerability of each and every ecosystem. These forms of stress fall under two categories; natural and human induced. In regards to natural stress‚ the term gradual is used as it happens at a slower rate and lesser magnitude
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Marine Ecology Final Exam Review Difference between broadcast spawners‚ brooders‚ direct developers‚ lecithotrophic and planktotrophic larvae * Many marine organisms have a dispersal phase in their life history * Dispersal can occur as eggs‚ sperms‚ fertilized eggs‚ larvae‚ juveniles or adults * Many species only disperse as juveniles or adults * Other species take advantage of high density of water to disperse during very early life stages: eggs/sperm/fertilized eggs/larvae
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