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9 Cards in this Set
- Front
- Back
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Would 10 quadrats be enough? |
no, doesnt give a representative picture as it may not include the majority of species present |
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2 limitations of method and improvments |
difficult to get the right co-ordinate->data is subjective-->put tape across the field in a grid No repeat data --> not representative --> 3 repeats Only valid on that day --> do it over the course of the year Grass --> not identified --> refer to particular species with identification chart |
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Why is the heavey crazed higher in SDI |
Grass is eaten so not allowed to out compete Shortened grass means reduced comp. for light + space + nutrients |
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Why use SDI rather than richness or evenness? |
Takes both evenness and richness into account Richness --> doesnt give no. of individuals Evennes --> doesnt give no. of species |
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Data question |
Are speces all in one place? Is one speices occuring in one place but not the other? Include data |
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Transpiration |
Loss of water vapour from stomata (leaf) |
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Transpiration in tall plants |
High Lots of sunlight --> photosunthesis so water is getting used up in the rection Windy Not humid |
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Transpiratin in smaller plants |
Low No wind Less sunlight Humid --> More even water potential |
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Effect of just having 'grass' |
Diversity iindex is smaller Should be recorded as individual species --> increasses species rchness, decreases no. of individuals of each species (evenness) |
