Natural vegetation refers to a plant community that has grown naturally without human assistance and has remained undisturbed by human activity for a long time. This untouched plant community is termed virgin vegetation.
The term "flora" is used to denote the plants of a particular region or period, while "fauna" refers to the species of animals in a specific area. The diversity in the flora and fauna is influenced by several factors, including relief and soil.
Relief
Land
Land has a direct and indirect effect on natural vegetation.
-
Fertile Level Land
: This type of land is usually used for agriculture because it is rich in nutrients and suitable for growing crops.
-
Undulating and Rough Terrains
: These areas, with their uneven surfaces and rugged landscapes, are where grasslands and woodlands typically develop. Such terrains provide habitats for a variety of wildlife.
Soil
Different types of soils support different types of vegetation.
-
Sandy Soils of the Desert
: These soils are found in arid regions and are capable of supporting plants like cactus and thorny bushes that are adapted to dry conditions.
-
Wet, Marshy, Deltaic Soils
: These soils are found in wet and marshy areas, often in deltas, and support vegetation such as mangroves and other deltaic plants.
-
Soil on Hill Slopes
: The soil found on hill slopes is conducive to the growth of conical trees, which are adapted to the sloped terrain and often found in mountainous regions.
This variety in soil and land types across different regions of India leads to a diverse range of natural vegetation and wildlife, contributing to the rich biodiversity of the country.
Climate
Temperature
Temperature plays a crucial role in determining the character and extent of vegetation. It influences the types of plants that can grow in a region, as well as their growth patterns.
-
High Temperatures
: Regions with higher temperatures tend to support vegetation that is adapted to heat, such as tropical and subtropical plants.
-
Low Temperatures
: Areas with lower temperatures, especially those experiencing frost, support vegetation that can withstand cold, such as coniferous forests.
Temperature affects not only the types of plants that grow but also their growth rate. For instance, many plants grow more slowly in colder temperatures.
Photoperiod (Sunlight)
The amount of sunlight a region receives, known as the photoperiod, varies based on latitude, altitude, season, and the length of the day. This variation impacts plant growth significantly.
-
Longer Sunlight Duration
: In summer, the extended hours of daylight allow for more photosynthesis, leading to faster growth of plants and trees.
-
Shorter Sunlight Duration
: In winter, shorter days slow down the growth process due to reduced photosynthetic activity.
Precipitation
The amount of rainfall a region receives is directly linked to the density and type of vegetation found there.
-
Heavy Rainfall
: Areas with abundant rainfall support dense forests, such as tropical rainforests, where a wide variety of plant species thrive.
-
Low Rainfall
: Regions with sparse rainfall typically have less dense vegetation, such as grasslands and deserts, where plants are adapted to dry conditions and can survive with minimal water.
Together, temperature, sunlight, and precipitation create diverse climatic conditions that shape the natural vegetation and wildlife in different regions, contributing to the rich biodiversity found across various landscapes.