by Rohan Nath
Invasive or alien species are notorious for disturbing ecosystems across the world. Invasive species are capable of having large ecological and financial impacts. This can affect the ecological services provided by the nature and also local economic systems which involve the practice of subsistence agriculture and harvest of biological resources.
Shackleton et al. (2007) suggested that the impact of invasive species depends on factors like the density and rate of spread of the invasive species, how the local economies incorporate them as beneficial elements as firewood or food, and the vulnerability of the local communities. Invasive species can hamper the environment affecting the livelihoods which in turn determines the vulnerability of the community. Dependency upon subsistence agriculture, lack of household savings and reliance upon products obtained from the ecosystems. Invasive species greatly alter the local ecosystems and human communities with little resilience to ecological changes.
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