Questions tagged [biology]

The science of life and of living organisms, including their structure, function, growth, origin, evolution, and distribution.

Filter by
Sorted by
Tagged with
0
votes
0answers
29 views

Converting multiple polygons into rasters using ArcGIS Desktop

I want to convert a couple of thousands of polygons (fish species data, each fish species shown as one polygon) into raster data (size of 10*10km), the conversion tool (polygon to raster) in ArcGIS ...
0
votes
0answers
137 views

Trying to make a fish diversity map using ArcGIS 10.7.1

I'm relatively new using ArcGIS. I want to make a fish species richness map (or fish diversity map; essentially tells you how many fish species are in each grid cell). Things I did so far: Obtained ...
2
votes
1answer
332 views

Measuring percentage overlap between home ranges and another shape file in R

I have tracking data from multiple animals and I have created kernel density estimates of their home ranges. I want to find out the proportion of each home range area that falls within protected areas....
5
votes
2answers
69 views

Do Navigation Apps Shrink the Hippocampus?

A study shows London cab drivers' hippocampi grow compared to a control group of similar non-drivers. I presume these cab drivers don't rely on navigation apps. ...acquisition of an internal ...
1
vote
2answers
47 views

WWF Terrestrial Major Habitat Types [closed]

I need the shapefile of the map attached (or very very similar) - but I can't find. I attached it here. Somewhere I found a picture where it is named "Terrestrial Major Habitat Types".
0
votes
0answers
41 views

Convex Hull not outputting expected number of features

I have a .csv file with observations of various species and I want a polygon to illustrate the area where those species occur. I ran the Convex Hull, grouped by the species' names field, which ...
2
votes
2answers
47 views

High-resolution, hyperspectral satellite imaging?

I am hoping to expand my (biology-focused) research to include satellite data. For this, I'd need satellite imaging that includes multiple values in the visible spectrum (specifically, above 490nm) ...
3
votes
1answer
566 views

Spatial Index on 100s of Millions of Records Taking Days in PostGIS? [closed]

I have a table with ~200million spatial records in it, and it is taking days to build a spatial index on the one geometry column: should this be taking so long? The geom column is of the type ...
4
votes
3answers
21k views

Measuring distance between points using QGIS?

I have a layer with about 500 single points. Now I want to measure the distance between each of these points and one specified observation point. I need the distance to show how far away from the ...
6
votes
2answers
4k views

Calculating Shannon's diversity using moving window in R

I have a raster where each pixel is a particular vegetation type. I'm interested in the diversity of vegetation types around each pixel. I'd like to assign a Shannon's diversity index value (see ...
1
vote
1answer
118 views

Getting species geodata (via Lifemapper)

In the search for species occurence data I stumbled on the Lifemapper project (http://lifemapper.org/). For creating biological models they posess a very comprehensive database. Unfortunately it does ...
4
votes
1answer
505 views

Comparing ranges and distributions of species, looking for correlation and differences between ranges

As a biology student just beginning with GIS, I wondere if someone could give me an idea of what tools to go about using to compare the range of 3 species that have trophic effects on one another. I ...
1
vote
1answer
587 views

Designing ArcPad Quickforms to Collect Biological Data?

I am trying to design a Quickform in ArcPad 10.2 to enable efficient capture of biological survey information in the field on a Trimble Juno 3D. I am currently investigating using the Form Creation ...
3
votes
1answer
797 views

Counting animals using near infrared imagery from a drone

I am playing around with an idea of using a near infrared camera to fly transects to count animals on the ground. I have been involved in such work earlier, but on bigger mammals and observer based ...