What is Biodiversity of Plants and Animals Its Types Levels and Importance
Biodiversity can be explained as the variety of living organisms like plants, animals and microorganisms on earth. Irrespective of their dimensions and habits, each living organism tends to play an essential role in biodiversity.
Together, all living organisms increase the productivity of their ecosystem. For instance, a significant number of plants assure an increase in the variety of crops for consummation.
As a result, it ensures natural sustainability for every organism in the ecosystem. It further makes it all the more important to conserve the biodiversity from any harm.
In a broad sense, there are three levels of biodiversity, namely, genetics, species and ecosystems. Notably, the richest and maximum biodiversity is found in forests, especially the one located in the tropical and equatorial regions.
On that note, let’s proceed to find out more about the diversity of plants and animals and their importance for humans.
Fun fact: The term ‘Biodiversity’ was coined in1985 by Walter G. Rosenand is a compound word for ‘biological diversity’.
Plant Biodiversity
It is simply the collection of all floras within a specific area. Each of such flora differs in species composition, physical attributes and contributions to the ecosystem they exist in.
Plant biodiversity serves as a primary source of food, shelter and agriculture and includes varied types of trees, shrubs, grasses, herbs, bushes, ferns, vines and moss.
However, overexploitation, deforestation, use of chemical fertilisers and clearing forests for agriculture are some of the persistent threats to this biodiversity.
It is noteworthy that with plants being the only source of oxygen and the major source of carbohydrate, we need to conserve floras and their natural habitat at all cost.
Animal Biodiversity
The biodiversity of animals comprises several species of faunas, which differ significantly in their physical attributes, composition and functioning.
Over the years, human beings have trained and domesticated animals to meet several needs and requirements. Notably, animals have been used extensively in the production of food, as a means of transportation, etc.
Loss of habitat, hunting, poaching and over-exploitation are some of the several threats that animals are faced with for many years. Since the biodiversity of plants and animals are interdependent on one another, constant efforts must be made to maintain a healthy balance in biodiversity.
DIY: Write differences between flora and fauna and give suitable examples for each.
Importance of Plants and Animals in Human Life
These pointers highlight the scientific, aesthetic and economic importance of plants and animals in human life –
Produces oxygen.
Serve as a food source ensuring food security.
They act as natural sources of medicine.
Helps to stabilise land against erosion.
Facilitates the degradation of waste.
True or False: a) Deforestation is the act of planting trees and sowing seeds.
Do You Know around 12% of bird species and 24% of mammals are currently under the threat of extinction? With that being said, let’s find out major threats on animal and plant biodiversity.
Threats to Biodiversity
Habitat Loss
Invasive Species and diseases
Deforestation
Pollution
Poaching
Overpopulation
Overexploitation of Species
Climate Change
All these, coupled with other irresponsible human activities, can lead to the extinction of different species. In which, it hampers the balance and sustainability of the ecosystem.
DIY: Write 4 tips to conserve plant and animal biodiversity.
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FAQs on Biodiversity of Plants and Animals Explained for Students
1. What is biodiversity of plants and animals?
The biodiversity of plants and animals refers to the variety and variability of plant and animal life within a particular region or on Earth as a whole. It includes diversity at three main levels:
- Genetic diversity – variation within a species (e.g., different varieties of rice or breeds of dogs)
- Species diversity – variety of different species in an ecosystem (e.g., trees, birds, insects in a forest)
- Ecosystem diversity – variety of ecosystems such as forests, grasslands, wetlands, and oceans
Biodiversity is essential for ecosystem stability, food security, and environmental balance.
2. Why is biodiversity important in an ecosystem?
Biodiversity is important because it maintains ecosystem stability, productivity, and resilience. A rich diversity of plants and animals helps ecosystems function effectively through:
- Pollination by insects and birds
- Nutrient cycling by decomposers like fungi and bacteria
- Food web balance among producers, consumers, and decomposers
- Resistance to environmental changes such as diseases and climate fluctuations
Greater biodiversity generally increases the ability of an ecosystem to recover from disturbances.
3. What are the main types of biodiversity?
The main types of biodiversity are genetic diversity, species diversity, and ecosystem diversity. These are defined as:
- Genetic diversity – differences in genes within a species
- Species diversity – number and abundance of different species in a habitat
- Ecosystem diversity – variety of ecosystems in a geographical area
Together, these levels explain how plant and animal biodiversity supports life on Earth.
4. How does biodiversity support food chains and food webs?
Biodiversity supports food chains and food webs by providing a variety of producers, consumers, and decomposers. In an ecosystem:
- Plants (producers) convert sunlight into food through photosynthesis
- Herbivores and carnivores (consumers) transfer energy by feeding on plants or other animals
- Decomposers break down dead matter and recycle nutrients
A higher diversity of species creates more complex and stable food webs, reducing the risk of collapse if one species declines.
5. What is species richness in biodiversity?
Species richness is the number of different species present in a particular area or ecosystem. It is a simple measure of biodiversity that:
- Counts distinct plant and animal species
- Does not consider population size
- Is higher in tropical regions like rainforests
Greater species richness generally indicates a more diverse and potentially stable ecosystem.
6. What is the difference between flora and fauna?
The difference between flora and fauna is that flora refers to plant life, while fauna refers to animal life in a region. Specifically:
- Flora includes trees, shrubs, grasses, algae, and other plants
- Fauna includes mammals, birds, reptiles, amphibians, fish, and insects
Together, flora and fauna represent the living components of biodiversity in any ecosystem.
7. What are biodiversity hotspots?
Biodiversity hotspots are regions with exceptionally high species diversity and a large number of endemic species that are under threat. To qualify as a hotspot, an area must:
- Contain at least 1,500 endemic plant species
- Have lost at least 70% of its original habitat
Examples include tropical rainforests and coral reefs, which are priorities for conservation efforts.
8. How do human activities affect biodiversity?
Human activities reduce biodiversity mainly through habitat destruction, pollution, overexploitation, and climate change. Major impacts include:
- Deforestation and land conversion for agriculture
- Pollution of air, water, and soil
- Overfishing and hunting
- Global warming altering habitats
These activities can lead to species extinction and disruption of ecosystem balance.
9. What is conservation of biodiversity?
Conservation of biodiversity is the protection, preservation, and sustainable management of plant and animal species and their habitats. It can be achieved through:
- In situ conservation – protecting species in their natural habitats (e.g., national parks)
- Ex situ conservation – protecting species outside their natural habitats (e.g., zoos, seed banks)
Conservation ensures long-term survival of species and maintenance of ecosystem services.
10. How does climate change impact plant and animal biodiversity?
Climate change impacts plant and animal biodiversity by altering temperature, rainfall patterns, and habitat conditions. Its effects include:
- Shifts in species distribution toward cooler regions
- Changes in flowering and breeding seasons
- Increased risk of extinction for sensitive species
- Coral bleaching in marine ecosystems
Rapid climate change can exceed the adaptive capacity of many species, reducing overall biodiversity.
