Joshua A. Spiers

5 Questions 12 Answers 0 Followers

Questions related from Joshua A. Spiers

What will lead to a decline in maximum photosynthetic rate of heat acclimated plants?

I grew Podocarpus seedlings at elevated temperatures for 16 weeks after which I ran temperature response curves using a Licor 6400 IRGA. The optimum temperature for photosynthesis remained...

10 October 2019 7,122 2 View

What can I use to fit Electron Transport Rate Vs PPFD curves to a rectangular hyperbola model?

Using a chlorophyll fluorometer (Mini-PAM; Walz; Effeltrich, Germany) I plotted ETR vs PPFD curves. What software / r package/excel sheet can I used to fit this data to a rectangular hyperbola...

07 July 2019 4,843 3 View

How to calculate NDVI using high resolution imagery which only has bands I 2 and 3?

I have high resolution aerial photography (12.5 cm) data which only has bands I, 2 and 3. I am trying to detect individual tree species. How can I calculate a near infrared band for this data-set...

01 January 2018 9,202 8 View

Where can I download MODIS 250m EVI and NDVI for a Caribbean country?

I am trying to download this data from GLOVIS USGS and other similar websites but the data is not downloadable. Any suggestions and where I can get this or similar data? It would be best for me...

03 March 2017 8,236 9 View

Can I downscale climate data from Worldclim which will be used in species distribution modelling ?

I am interested getting my MaxEnt model at higher resolution. The model involves the use of the common 19 Bioclimatic variables. I understand some people are against the use of variables from...

12 December 2016 2,959 12 View