Questions tagged [biology]

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

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How to measure flight activity (in vector lines) of a bird within a boundary using raster analysis

I need to find out the time a bird spends in different areas within a windpark. I have a shapefile (flight lines) with the following attributes: "presence" is always = 1, the times ...
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0 answers
244 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 ...
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  • 11
3 votes
1 answer
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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....
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5 votes
2 answers
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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 ...
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1 vote
2 answers
98 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".
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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 ...
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  • 348
2 votes
2 answers
85 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) ...
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3 votes
1 answer
1k 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 ...
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6 votes
2 answers
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 ...
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  • 105
1 vote
1 answer
119 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 ...
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  • 13
4 votes
1 answer
542 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 ...
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1 vote
1 answer
619 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 ...
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3 votes
1 answer
847 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 ...
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