Module-3-Aquatic-Ecology-and-resources.pdf - Republic of...

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Page 1of 24Lakewood, ZDS Republic of the Philippines ZAMBOANGA STATE COLLEGE OF MARINE SCIENCES AND TECHNOLOGY Fort Pilar, Zamboanga City Tel No. 992-3092/Tel No: (062) 991-0643 Telefax: (062) 991-0777 website:http:MODULE III in Aquatic Ecology and Resources Module Title Student Name and Section ANGELO C. MACARIO Professor College of Fisheries and Marine Sciences Fisheries Program April 2021
Page 2of 24Intended Learning Outcomes (ILO) MODULE 3.0 THE WATER AND FRESHWATER ECOLOGY This module will cover Chapters 5 and 6 of the course Aquatic Ecology and Resources the water and freshwater ecology. Topics in this module include the properties and classification of water bodies/aquatic ecosystems. Furthermore, the freshwater ecosystem will be discussed in detailed especially different bodies of freshwater the lentic and the lotic communities. At the end of this module you are to: For chapter 5….1.distinguish aquatic ecosystems based on geo-physico and chemical parameters of water. For chapter 6 …2.differentiate the three zones in lentic communities; 3.compute lake morphometry; 4.draw the pond ecosystem showing the different basic units; 5.describe a stream, spring and river according to their land-water interchange. Timing You are given a total of 21 hours to study and accomplish the tasks in this module. Assignments/assessments given per unit chapter must be submitted within the given period.
Page 3of 24Lecture proper Chapter 5. The Water There are four major habitats in the earth’s biosphere - marine, estuarine, freshwater and terrestrial (Odum, 1971). Water is far more massive and vast in terms of area and volume in comparison to terrestrial habitat. Aquatic environment contain diversified types of vertebrate and invertebrate representatives. To understand more we need to study first the important properties of water. Water as a natural resources: the properties of water The structure of the water molecule creates weak attractions between the oxygen end of one molecule and the hydrogen ends of other water molecules. Even though these ―polar‖ bonds are relatively weak and are constantly breaking and reforming, their existence results in many special properties of water compared to other substances on Earth. These properties of water are largely responsible for life on Earth. Below are natural properties of water - Chemical, Physical, and Biological. Chemical Properties Natural waters always contain dissolved salts, micronutrients, some metals, and gases. In fact, so many substances dissolve in water that it is sometimes (mistakenly) referred to as the "Universal Solvent." While most of these substances are important for healthy aquatic ecosystems, as concentrations increase, they can have negative effects and we think of them as pollutants.

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