Previous Year Question

The Marine Ecosystem is considered the most stable ecosystem among the given options. Ecological Stability refers to the ability of an ecosystem to maintain its structure and functioning despite environmental changes or recover after disturbances. Oceans cover approximately 71% of the Earth's surface. Their enormous volume and depth allow many environmental changes to occur relatively slowly.

The High Specific Heat Capacity of Water is a major reason for the physical stability of marine ecosystems. Water can absorb and release large amounts of heat without undergoing substantial temperature changes. Additionally, Ocean Currents, Tides, and Water Mixing contribute to the distribution of heat and nutrients. Oceans also play an important role in regulating the Earth's climate. According to NASA, approximately 90% of the excess heat resulting from global warming has been absorbed by the oceans.

The Marine Food Web includes Phytoplankton, Zooplankton, fish, marine mammals, and decomposers. Phytoplankton function as Primary Producers through Photosynthesis and form the foundation of marine food chains. Different ecological zones develop within oceans depending on temperature, Salinity, Dissolved Oxygen, and nutrient availability. Particularly in deep ocean regions, daily temperature variations are generally smaller than those at the surface.

Forest, Mountain, and Desert Ecosystems are also important, but their environmental conditions differ. Forests may be affected by seasonal changes, fires, and land-use changes. Mountain regions experience rapid changes in temperature and other climatic conditions with altitude, whereas deserts are characterized by limited water availability and extreme daily temperature variations. However, marine stability does not mean that oceans are unaffected by environmental changes. Ocean Warming, Ocean Acidification, and Coral Bleaching are currently affecting their ecological balance.