Seed predation in exotic and native legumes Lab Report

Seed predation in exotic and native legumes - Lab Report Example This way the exotic species reproduce fast and form dense populations thereby eliminating the native species that had initially thrived in the ecosystem freely. These are referred to as invasive exotic species. Exotic species are also referred to as non-indigenous species in many books. According to Keane and Crawley 2012, the most straightforward and appealing explanation for the rapid establishment and proliferation of non-indigenous species is that they are produced from the effects of their common foes and pathogens. The enemy release hypothesis explains that the abundance or impact of some non-indigenous species is related to the scarcity of natural enemies in the introduced range compared with the native range. This experiment is aimed at evaluating the effect of invasive exotic species in the ecosystem. Pods of A. lebbeck and L. latisiquum will be used to show the damage by our predator which in our case is the Bruchid beetles. The frequency of the holes made in the pods of the two different species will help us to generate our hypothesis with the two variables being used to generate the hypothesis being the origin of the species and the damage caused. The Chi-square test which will be done at the end of the practical session will be used to determine whether or not the damage caused on the seed pods was independent of the origin of the species. Our chi-square results will provide evidence of the dependence of damage on the origin of the species that we used. According to Siemann and Rogers 2003, the existence of exotic species could be enhanced by better adaptation methods and faster growth rate in the prevailing conditions. Further with time the native species could have generated many enemies and so its survival is further limited, Blossey & NÃ ¶tzold 1995. If the exotic species has developed a resistance to the Bruchid beetles then it