# Lab Report Biodiversity

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INTRODUCTION
Biodiversity presents occurrence of variety of species and their natural community in which they live. By the definition it is “The degree of variation of life forms within a given species, ecosystem, biome, or an entire planet. It is a measure of the health of ecosystems and is in part a function of climate.” (Rutherford) Ecosystem is on the other hand, “ community and its abiotic environment”( Rutherford). Biodiversity exists in every ecosystem, weather it is big one, or just ecosystem of one garden, it has the same importance because without it nature loses its ability to perform major functions needed for life on Earth, as it is oxygen production. Trough this investigation, two different ecosystems will be explored and
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Data collected in garden at 3 m2 area Type of species | Number of organisms | | Measurement number 1 | Measurement number 2 | Measurement number 3 | Measurement number 4 | Mean value | Tulip | 6 | 6 | 5 | 6 | 6 | Rose | 4 | 4 | 4 | 4 | 4 | Carnation | 6 | 4 | 6 | 6 | 6 | Total number of species: 3 | |

Mean value:
Tulip: (6+6+5+6)/4=5.75≈6
Rose: (4+4+4+4)/4=4
Carnation: (6+4+6+6)/4=5.5≈6

Graph 1. Percentage of species at meadow

Graph 2. Percentage of species at garden

* Calculating Simpson`s reciprocal index for meadow species: N- Sum of all individuals n- Total number of organisms of a particular species D = N (N-1) / Σ n (n-1) D = 80(80 -1)/ (930+552+110+42+42) D=6320/1676 D=3.77

* Calculating Simpson`s reciprocal index for garden species: N- Sum of all individuals n- Total number of organisms of a particular species D = N (N-1) / Σ n (n-1) D = 16(16 -1)/ (30+12+30) D=240/72 D=3.33 Graph 3. Simpson`s reciprocal index at meadow and garden

DICUSSION
After I carried out the entire investigation, I got the results showing biodiversity of two different ecosystems trough Simpson`s reciprocal index showed in graph 3. If we look generally on biodiversity index of both ecosystems, in both cases it is higher than 1, meaning that biodiversity index is not low. As the maximum value is equal to the number of species in the sample, we can say that in case of meadow, biodiversity is optimal, at medium