Physical parameters and species distributions

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    Other
  • Document type:
    Assignment
  • Level:
    Masters
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    1
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    599

Physical parameters and species distribution

The Name of the School

  1. Produce a figure showing the distribution of each species as a function of location along the transect

physical parameters and species distributions

  1. Examine the distribution of all species. Was there evidence for aggregated occurrence in any species?

(Fan & Miguez-Macho 2013).> 1.96 meaning that p-value < 0.05 hence the results from this experiment is different from random expectation. Indicating no aggregated evidence4.321779 Z-score was . The sign is positive indicating that there are more runs than random. If in case the (Royle et al., 2012)<1.96 meaning that p-value > 0.05 hence the results from this experiment is similar from random expectationYes there is evidence for aggregated occurrence in the species with, Z-score of 0.525263

  1. How might the scale that we used (the length of transect) influence the pattern detected in all species?

The scale will influence the pattern of transect and how the distribution will spread out throughout the species under investigation.

  1. What do these results tell you about the effects of physical parameters in determining plant species occurrence?

(Tyberghein et al., 2010)It shows that there are several possible reasons or factors of climate that can be deduced from records of temperature including precipitation, humidity, evapo-transpiration, solar radiation among others factors for any potential periods of time within and between years

  1. What were the assumptions relating species presence and environment underlying the use of the runs test? What other ecological factors might also need to be considered in attempts to explain species’ presence or absence at a location?

The assumptions in this results include:-

  • No humidity effect of the plants

  • There is no other external interference

  • No temperature change.

Other factors that might be considered include:-

  • Precipitation

  • Humidity

  • Evapo-transpiration,

  • Solar radiation

. (Tyberghein et al., 2012)Among others factors for any potential periods of time within and between years. The so called regime control which is mostly by climate is then filtered by both the dispersal, disturbance and resource factors and thus results into the tease apart their effects on the realized distributing requires dynamic modeling. This is very important in establishing the species distribution within a given locality

  1. Using the descriptions of the plants provided in Appendix 1, do you think that species with similar growth habits or similar traits appear more likely to overlap in their distributions than species that are not similar?

Yes from the result this might be true and this is followed by major factors that determine the species distributions which is vegetation patterns is the climatic condition. Fatal effect of low temperature in setting range limits of plants species at a higher latitudes and altitude. The results gives similar patterns when the runs are done through calculators. This gives a clear indication of the characteristics and traits of different species (Seinfeld & Pandis 2016).

Reference

Fan, Y., Li, H., & Miguez-Macho, G. (2013). Global patterns of groundwater table depth. Science, 339(6122), 940-943.

Royle, J. A., Chandler, R. B., Yackulic, C., & Nichols, J. D. (2012). Likelihood analysis of species occurrence probability from presence‐only data for modelling species distributions. Methods in Ecology and Evolution, 3(3), 545-554.

Seinfeld, J. H., & Pandis, S. N. (2016). Atmospheric chemistry and physics: from air pollution to climate change. John Wiley & Sons.

Tyberghein, L., Verbruggen, H., Pauly, K., Troupin, C., Mineur, F., & De Clerck, O. (2012). Bio‐ORACLE: a global environmental dataset for marine species distribution modelling. Global Ecology and Biogeography, 21(2), 272-281.

Tyberghein, L., Verbruggen, H., Pauly, K., Troupin, C., Mineur, F., & De Clerck, O. (2010). Bio‐ORACLE: a global environmental dataset for marine species distribution modelling. Global Ecology and Biogeography, 21(2), 272-281.