(Ecology) Plant Competition Lab Report Example | Topics and Well Written Essays - 2000 words

(Ecology) Plant Competition - science laboratory Report ExampleHence, it is logical to think that as the density of the plant increases, the more intense the contest becomes. In fact, this was demonstrated by Kothari et al. (1974) on Dichanthium annulatum, a dominant perennial pasturage species. It was observed in the study that as the number of plants increased from 17 to 135 individuals per meter-squared of land, the mean dry weight and northward content per D. annulanum materially decreased as compared to the other set-ups with lower plant densities. Meanwhile, interspecies competition refers to the fundamental interaction between two diametrical plant species vying for the same resources (Freedman, 2011). Crops interspersed with weeds would be a good illustration of interspecific competition. Those species equipped with the least capacity to compete for the same environmental supply has to adapt or die eventually (Went, 1973). One of the earliest experimental investigations which catalogued the existence of competition within the floral residential field was conducted by Clements et al. (1929). Clements and his team planted sunflower, wheat, potatoes, and other plants species in varying distances with each other. Height (cm), leaf area (cm2), and dry weight (g) were then taken 80 days after planting (Clements et al., 1929). Results of the experiment indicated that the close together(predicate) the plants are to each other, the more apparent growth inhibition becomes. Interestingly, increasing the number of plants per plot resulted to an boilers suit production reaching a maximum value, which did not change even if spacing was decreased (Clements et al., 1929). It was to a fault noted that growth of all plants within the same plot were equally inhibited (Clements et al., 1929). However, a different finding was observed by Wan et al. (2006) with the growth of Leymus chinensis, a C3 grass species and Chloris virgate, a C4 grass in a mixed pot culture . The researchers cultivated L chinensis in a 21 cm-diameter pots with 2 individuals per pot (monoculture) or mixed with C. virgate. Assimilation rate, quantum efficiency, light-saturated assimilation rate were then recorded for each set-up (Wan et al., 2006). Results revealed that interspecific competition significantly reduced the measured parameters for the C3 species. However, the presence of the C3 plants had no effect on the C4 species (Wan et al., 2006). The result suggested an unsymmetrical competition between a C3 and C4 species, with the negative effect taking its toll on the C3 plants only. Njambuya et al. (2011) likewise provided demonstrate in support of Wan et al. (2006) that indeed, asymmetric competition occurs. But Njambuya and her team discovered a significant finding the response of the mixed culture of Lemna minuta, an invasive species and Lemna minor, a native species is also affected by the amount of nutrients supplemented into the culture. In the presence o f high nutrient availability, the invasive species exhibited higher comparative Growth Rate (RGR) as compared to the native species (Njambuya et al., 2011) However, when under low nutrient conditions, the native species showed higher RGR recounting to the invasive spec