Module-7-Aquatic-Ecology-and-Resources.pdf - Republic of...

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1 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 VII in Aquatic Ecology and Resources Module Title Student Name and Section ANGELO C. MACARIO Professor College of Fisheries and Marine Sciences Fisheries Program June 2021
2 Intended Learning Outcomes (ILO) MODULE 7.0 NATURAL AND ANTHROPOGENIC IMPACTS ON AQUATIC NON-FISH RESOURCES This module will cover Chapters 13 of the course Aquatic Ecology and Resources Natural and anthropogenic impacts on aquatic non-fish resources . Topics in this module include various impacts of climate change, eutrophication, pollution, aquaculture and mining to aquatic non-fish resources and its implication to future perspective. At the end of this module you are to: 1. predict the future of aquatic resources from the current impacts of natural and anthropogenic activities Timing You are given a total of 9 hours to study and accomplish the tasks in this module. Assignments/assessments given per unit chapter must be submitted within the given period.
3 Lecture proper CHAPTER 11. NATURAL AND ANTHROPOGENIC IMPACTS ON AQUATIC NON-FISH RESOURCES This module discusses on the natural (c aused by nature) and anthropogenic (human activity/man made) impacts on the aquatic ecosystem (both on biotic and biotic factors). Some of the natural and anthropogenic influences include climate change, eutrophication, pollution, aquaculture and mining. CLIMATE CHANGE Climate change is a change in global or regional climate patterns, in particular a change apparent from the mid to late 20th century onwards and attributed largely to the increased levels of atmospheric carbon dioxide produced by the use of fossil fuels. (oxford definition) Climate change describes a change in the average conditions such as temperature and rainfall in a region over a long period of tim e. NASA scientists have observed Earth‘s surface is warming, and many of the warmest years on record have happened in the past 20 years. (NASA definition) Causes of climate change a. Anthropogenic causes The factors that can cause a change in the atmosph eric system or climatic regime are called ―climate forcing‖ or ―forcing mechanisms.‖ So, forcing mechanisms can be of two types, i.e., internal forcing mechanism and external forcing mechanisms. Internal forcing mechanisms are natural processes in the climatic system like thermohaline circulation, etc. External forcing mechanisms can also be of two types - anthropogenic mechanisms including greenhouse gas emission and the emission of several other pollutants and natural mechanisms like changes in solar output, volcanic eruptions, etc. All these mechanisms are responsible for the change of climate. But overwhelming evidence exists that anthropogenic activities are the major reason behind this dreadful condition. These are described below.

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