What are the consequence of loss of biodiversity class 12 biology?
A rapid environment change typically causes mass extinctions. -A decline in plant production will be a loss of biodiversity that will affect the ecosystem on earth. -A low resistance to environmental perturbations will eventually make a species less adaptable to a given environment and finally loss of biodiversity.
What are the consequences of loss of biodiversity?
This lack of biodiversity among crops threatens food security, because varieties may be vulnerable to disease and pests, invasive species, and climate change.
What are the consequences of loss of biodiversity in a region?
Loss of biodiversity results in natural disaster such as drought. iii. Increased variability in certain ecosystem processes such as plant productivity, water use, and pest and disease cycles. iv.
What are the causes and consequences of loss of biodiversity?
Biodiversity loss is caused by five primary drivers: habitat loss, invasive species, overexploitation (extreme hunting and fishing pressure), pollution, climate change associated with global warming. In each case, human beings and their activities play direct roles.
What are the causes and consequences of loss of biodiversity class 12?
Habitat loss and fragmentation is the most important cause that is resulting in extinction of plants and animals. Over-exploitation: Human need for natural resources has turned into greed. … Alien species invasions: Some of the alien species turn invasive; resulting in decline or extinction of indigenous species.
What is loss of biodiversity class 12?
Complete Answer:-Biodiversity loss is the decline in the amount of a specific species in a given ecosystem. The decline of plant and animal species also results in the loss of biodiversity and this loss can either be reversible or irreversible.
What is loss of biodiversity?
Biodiversity loss refers to the decline or disappearance of biological diversity, understood as the variety of living things that inhabit the planet, its different levels of biological organisation and their respective genetic variability, as well as the natural patterns present in ecosystems.
What are the consequences of extinction?
What are the consequences of extinction? If a species has a unique function in its ecosystem, its loss can prompt cascading effects through the food chain (a “trophic cascade”), impacting other species and the ecosystem itself.
What is causes of loss of biodiversity?
The numerous factors are responsible for the loss of Biodiversity (Figure 1) such as pollution, habitat loss, hunting, introduction of invasive species, overexploitation of preferred species, climate change, and natural disasters.
Why should we conserve biodiversity class 12?
Complete answer: We should conserve our biodiversity because we have inherited it and the future generation should also be able to inherit it. Loss of biodiversity has resulted in several ecological imbalances like: – Dramatic changes in ecosystem processes like the water cycle, disease cycle, pest cycle, etc.
What is the evil quarter?
There are four major causes of biodiversity losses which are collectively called as the evil quartet. These are habitat loss and fragmentation, over exploitation, alien species invasion and co-extinctions.
What consequences might a loss of genetic diversity have for the survival or extinction of a species?
Without genetic variation, a population cannot evolve in response to changing environmental variables and, as a result, may face an increased risk of extinction. For example, if a population is exposed to a new disease, selection will act on genes for resistance to the disease if they exist in the population.