%%EOF The formula for the Simpson's Index is Where: n = number of individuals of each species; N = total number of individuals of all species In ecology, it is often used to quantify the biodiversity of a habitat. One of the most common and easiest methods is the Simpson’s Diversity Index. The Simpson’s index combines both species richness and species evenness in one number. A full copy of the practice exam question (with markscheme), including question sections from the wider syllabus. uTl��U� Created: Mar 2, 2019| Updated: Apr 3, 2019. endstream endobj 204 0 obj <>stream • Biodiversity provides an aesthetic value that humans find appealing. endstream endobj 201 0 obj <>/Metadata 10 0 R/PageLayout/OneColumn/Pages 198 0 R/StructTreeRoot 16 0 R/Type/Catalog>> endobj 202 0 obj <>/ExtGState<>/Font<>/XObject<>>>/Rotate 0/StructParents 0/Type/Page>> endobj 203 0 obj <>stream For this activity use Simpson’s Index is of diversity.. Before you do the survey: Predict which parking lot (faculty or student) you expect to be most diverse and explain why. Simpson’s Diversity Index . This makes more sense. ?�c�ކ��M7�e�@�}%�4��]@��B�FjۨIގ��f�X^�F���1�P �R@��Q#�>�4Z��� t�Ё�cǊ}�)�� �:���x�,+�� ��m�H�=B�@Q@��0`��a@�@� In this case, the index represents the probability that two individuals randomly selected from a sample will belong to different species. Count at least 30 cars in the lot. Procedure: 1. An independent learning task designed to provide a full set of notes, complete with separate example question and mark schemes. The Index of Diversity which AS/A2 level … Square I am relatively new to using formulas in Stata and I want to calculate the Simpson's Diversity Index (Simpson in 1949) for each household (see data below) if this is possible?. Tes Global Ltd is �h��Ƙ���&���t�q?���%��� ��&�ݪ����t�W�|�,ڏ��he���Bh��*,�l�M�����xq.�G��8��3�tک���/���bTz�����X ��sN�s�pA�O��~���� >�F}LE�����T�����o��qtu� >c+?���'��g�)G,���~8��!R�Z`��STt�#��Q�~�Хq3L�0�"��]��aU~� ya�A��%�06>�����Z�5�4:4PU�����!>骳5�wR��GDl In soil-living arthropods, activity density, richness and Simpson’s diversity index were significantly higher in ground cover treatments than in the tillage treatment. h�bbd```b``�"ZA$� ɺL����H�T0�V�&�*�_�I_0�D2*��"���"� ��4�L}��`�:��)�dTL�M���[����g`D�&� �c� This index combines measures of species richness and species evenness. Any advice is greatly appreciated! A comprehensive diversity index, the microplastic diversity integrated index (MDII), was established to reflect the complexity of microplastics in the environment and indicate the condition of pollution sources based on the three Simpson indices (Simpson-shape, Simpson-color, Simpson … What does the value mean? n�ـ6UC�f�/�m�+�6�6����(s�(��j�o. Activity 1: Biodiversity Discussion. ��.�p���C�~�N���I;��-�t���\���k�j����~����? In ecology, it is often used to quantify the biodiversity of a habitat. The index comes from information science. The lesson includes a full PowerPoint containing learning objectives and keywords, definitions, examples of high and low biodiversity,a fully animated tutorial on how to calculate Simpsonâs Index of Diversity, a practice question and a suggested plenary. Simpson's Index (D) measures the probability that two individuals randomly selected from a sample will belong to the same species (or some category other than species).There are two versions of the formula for calculating D. The calculation is based on the number species in an area, dependent upon richness (number of unique species) and abundance (number of individual species). registered in England (Company No 02017289) with its registered office at 26 Red Lion In this case, a few rare species with only a few representatives will not affect the diversity. The Simpson diversity index is a measure of diversity that takes into account both wealth and fairness. The Simpson diversity index is a quantitative measure that reflects how many different types are there in a dataset, and how evenly the basic entities are distributed among those types in the data set. Simpson's Index of Diversity (1 - D) The value of this index also ranges between 0 and 1, but now, the greater the value, the greater the sample diversity. Simpson’s index is a scale ranging from 0 (no heterogeneity and no diversity) to a maximum close to 1 (high heterogeneity or lots of diversity). The Simpson index is a dominance index because it gives more weight to common or dominant species. 253 0 obj <>stream {4�k�b����p��-�S��N������a�F{E6�N�*�����"���;�J�K�}B�]cI���3�1�@����g���n:����������A�>����_����*=z;�N��IĐ;�V�1m�Pp��#1��pxv6�k���e�F)�,��VaB_�����:A�J�b�?�k��QF+{T��^�%F��f7�&� bJA�$��pk!l��C��l���s�Ha�#!R9�B3����D9�abg@;�v+]f#p�p����x��ϴ���x��V�~�-&阶��������r��K8�5I�x�h��.��iF���~�Y\�����}��f�����_/F�"�>�tFٴȋ�Sz�=��b�|���S�{����� �>��=N$疶;罬��fL���*�b���YiـjIz1N��Ћٴh�f? Simpson's Diversity Index is a measure of diversity which takes into account the number of species present, as well as the relative abundance of each species. Practical sheet: Investigating Simpson’s Diversity Index This can be completed in a single lesson. A biologist is comparing species diversity at two sites within Traeth-y-goes sand dunes. �TFK1v40w4�D����qw ��b)�H(?�3Q�M�ӛ�Yո�\�y�X�ߕ��!� s��i���V0E@-�``ܓ������a`��H37@� �e5 %PDF-1.5 %���� As species richness and evenness increase, so … A community dominated by one or two species is considered to be less diverse than one in which several different species have similar abundance. Answer the Pre-Lab Questions 2. Student Activity. An interactive Simpsonâs Diversity Index Excel Calculator - this can be used to quickly calculate Simpsonâs Index of Diversity for any habitat with 10 species or fewer. These activities allow students to model how environmental scientists compare diversity in different ecosystems by using ordinary playing cards as ‘species’ to generate data to calculate Simpson’s Diversity Index. Two copies exist to allow you to directly compare two habitats at once. 1.1 What does biodiversity mean to you? �s������l��jb�~YmI�\��sj���7Sk��@��8�\W�Ǳ�c?8��c?8��W�e��f��U8�_��5,������)�C�aϣV��+�"��Uk��&�o#����Q�X���� Simpson’s Diversity Index Another measure of diversity is based on the probability that any two elements selected at random will belong to the same category, i.e. Biodiversity Index Shannan Muskopf May 12, 2018 This activity asks students to sort seashells and calculate the Simpson’s biodiversity index. The term 'Simpson's Diversity Index' can actually refer to any one of 3 closely related indices. Discuss in class. Shannon-Wiener index (H) - Similar to the Simpson's index, this measurement takes into account species richness and proportion of each species within the local aquatic community. The biodiversity index here is high, 5/5 = 1. Simpson’s Diversity Index Simpson’s Index is one of the simplest calculations that takes into account species evenness within a community. I read the original paper of Simpson, but I'm more interested in an easier explanation (my skills in probability theory are more on an undergraduate level). Greater the value, greater the sample diversity. Full usage instructions are in the PowerPoint. This implies that HDDS increases with decreasing rate of Simpson’s Index. Activity 2: Species Richness and Evenness Many diversity indices have been developed to combine different measures of biodiversity. The coefficient of Simpson’s Index shows an average crop income of US$318 (TZS 503,832), Footnote 1 a one-unit increase in Simpson’s Index, associated with −1.318 unit increase in dietary diversity. London WC1R 4HQ. Full usage instructions are in the PowerPoint. An interactive Simpson’s Diversity Index Excel Calculator - this can be used to quickly calculate Simpson’s Index of Diversity for any habitat with 10 species or fewer. BACKGROUND: Simpson's Diversity Index is a measure of diversity. �� >��GQ� Az���v��j�*��V��j��>�כ�l7M ��-��`2? 3. 227 0 obj <>/Filter/FlateDecode/ID[<2D04ED058D99994987CB18E22E3485FD>]/Index[200 54]/Info 199 0 R/Length 122/Prev 121003/Root 201 0 R/Size 254/Type/XRef/W[1 3 1]>>stream Since this is counterintuitive, you can use Simpson’s Index of Diversity, 1 – D, or Simpson’s Reciprocal Index, 1/D. This activity introduces students to the Simpson’s Diversity Index which they may wish to use in the ecological study. [D Biology Classroom]how to use Simpson’s Index of Diversity (D)? :��܁�-�ɼ($((֓(l��� y)��|^�. One is called the Simpson's Index. It takes into account the number of species present, as well as the abundance of each species. counterintuitive, you can use Simpson’s Index of Diversity, 1 – D, or Simpson’s Reciprocal Index, 1/D. where n i is the number of observations from the sample in the i th of k (non-empty) categories, n is the sample size and p i = n i /n. &k�6u�d�[� It takes into account the number of species present, as well as the abundance of each species. A community dominated by one or two species is considered to be less diverse than one in which several different species have a similar abundance. A 4 X 4 meter square area in the forest has 1 pine tree, 1 fern, 1 conifer tree, 1 moss, and 1 lichen, for a total of 5 different species and 5 individuals. Raw data from point quadrats is used. h�b```c``������r�A����,3�+30� It indicates the probability that both organisms in a randomly drawn pair are from different species. In this article, a link is noted between a common family of diversity indices and non‐additive statistical mechanics. Google Classroom Facebook Twitter Conditions. This website and its content is subject to our Terms and `D` = Simpson's Diversity Index `n` = the number of individuals of each species `N` = the total number of individuals; Worked example. For this activity use Simpson’s Index is of diversity. The Simpson Diversity Index ranges from 0 to 1. Simpson's Diversity Indices. 200 0 obj <> endobj For Location A: = 1 - 608 = 1 - 608 = 1 – 0.337 = 0.663 43 x 42 1806 . We can use Simpson's index of diversity to quantify and compare the diversity of different communities. 0 A full lesson teaching Simpsonâs Index of Diversity from scratch. It has a very low biodiversity index of 1/300, or 0.003. The higher the probability of different species, the higher the diversity. 9. Simpson's Diversity Index: Measuring Biodiversity Maintaining biodiversity is important for a variety of reasons: • Diverse communities are generally less susceptible to perturbation (disturbance) than similar but less diverse communities. The … H��V�n�F}�W�#UD��q/@ ���R�0�>�~�%�V��D%��gf�"�K�mX\��Μ9�{��b2�m7�r��۷��m[.o�\̋�.�Es� Simpson’s Diversity Index can be explained as follows: If we randomly select an individual from a sample with- out replacement and then randomly select another individual from the same sample, what is the probability that the two organ- isms will be of different species? Many indices for measuring species diversity have been proposed. This method calculates not only the number of species represented in a given habitat but also how well each species is represented; therefore, the method takes into account much more than just species richness. ENE‑4.A.1 (EK) Species number and relative abundance affect the diversity of a community. Cover Image By I, Luc Viatour, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=998412, 1a.-Simpsons-Index-of-Diversity-Practice-Q-MS. Two copies exist to allow you to directly compare two habitats at once. Can you point out any problems in these assumptions? The index assumes that the proportion of individuals in an area indicate their importance to diversity. h��X�N#9�?�FY�/-���0@��0"�a�( ��榤����*���\H ���%��U�r��AG"!�p�`�;�$Ji1�&�&F��4�j���q�;FC'X���0��� For Location B: = 1 - 520 = 1 - 520 = 1 – 0.241 = 0.759 47 x 46 2162 . I'm interested in the derivation of the Simpson diversity index. This can be completed in a single lesson. I found the normal interpretation of this index, but I'm not able to see what's the "mathematical background" of the formula. Some students find the concept of species diversity quite … Simpson's Diversity Index. It is tailored for OCR A 4.2.2d, but can be easily adapted for any exam board. Simpson's Diversity Index is a measure of diversity. https://commons.wikimedia.org/w/index.php?curid=998412, NEW AQA GCSE Biology - 'Inheritance, variation and evolution' lessons, SAVE 50% Concise A* Complete A Level Biology AQA Spec & Mark Scheme Based Revision Notes / Summary (topic 1-8) and required practical workbook, Ecology: x4 Narrated PowerPoint shows/WMV films on this A-level and IB topic. 1���טw�G�_� �#��կ�r�Y�(�E�����|��Aj�XU�5~���1�S�,��_C�W�{'����_7���{�Q6�P�ȯ[���?����%� � Simpson’s Index (D) is dependent on the number of species and their relative dominance. endstream endobj startxref This makes the Shannon index and the Simpson diversity (or Gini coefficient) special cases of a more general index. This index is a measure of the probability that two organisms picked at random from the community will be different species. Calculating a Biodiversity Index Organize your team so that you collect your data as quickly as possible. 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