IMPACT OF CLIMATE CHANGE ON AQUATIC ECOSYSTEM AND ITS BIODIVERSITY: AN OVERVIEW

Abstract

Keywords: Climate change results from the increase in the greenhouse gas emission in the atmosphere and this comes as a consequence of various anthropogenic activities. The dissolution of CO , which has 2 the largest share among the greenhouse gases in terms of contribution in global warming, threatening the continuation of life on earth. Changing climate is of vital importance because of major impacts by influencing water resources and agricultural economy. Climate change stresses exert complex pressure on aquatic biodiversity and natural aquatic resources. Water temperature change may alter the metabolism and physiology of aquatic animals thereby affecting the growth, fecundity, feeding behavior, distribution, migration and abundance of fish as well as other aquatic animals. Aquatic biodiversity, Aquatic ecosystem, Climate change, Fishes. INTRODUCTION The word 'climate' refers to the long-term weather patterns within a defined region including temperature, humidity, rainfalls and wind amount. Weather refers to daily or weekly changes in the atmosphere, while climate is generally discussed, in terms of years, decades, centuries, and millennia. Today, the commonly used term 'climate change' represents any change in climate over a few decades, or millions of years, whether due to natural causes and/or as a result of human activities. Climate change alters entire ecosystems along with the living organisms that live there. Climate change has increasingly and profoundly threatened the g l o b a l e n v i r o n m e n t , b i o d i v e r s i t y a n d sustainable human development, chiefly by altering global thermal regimes and the water cycle and causing acidification (Huang et al., 2021).