How can plant species diversity have an effect on the divers

Solution

plant species diversity have an adverse effect on the animals community. Species diversity is changing globally and locally, Most of the animal diversity depands upon plants for food and shelter. High animal diversity increases complementary of herbivores but also increases the feeding rates. Depending on this mechanism some rich animal may put plants under top down control or may release them from grazing pressure. the diverse animal communities accumulate more biomass and are more exploitative on plants. However, they do not reduce plant biomass because the communities are composed of larger, and thus energetically more efficient, plant and animal species. A very simple structure of animal community of a single trophic level is limited to cause direct negative effects on the trophic level below. Therefore, it would become more exploitative on the plant community, due to niche complementarity, as animal diversity increases. In natural ecosystems, however, vertical and horizontal diversity are not independent of each other but are linked due to the complex feeding interactions within the animal community. As the number of species increases, animals cover larger parts of the resource niche space (horizontal diversity) and occupy new trophic levels (vertical diversity). The counteracting mechanisms inhibits that how animal diversity affects the plant community and the processes and ecosystem functions. Usually in experimental studies, the plant biomass standing stock, rates of herbivore consumption and metabolism are assessed to quantify ecosystem functions.