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Questions tagged [wildlife-ecology]

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Download GLOBathy TIFFs by country rather than one at a time

GLOBthy seems to be a very useful resource for studying lakes worldwide, however it has one significant problem; every lake is saved as different TIFF,and apart from a few large lakes, none of them ...
Birdman's user avatar
  • 63
0 votes
1 answer
23 views

Deployment matrix for occupancy with multiple gaps between several deployment time spans per deployment

I have a deployment table for camera traps. At each placement (place_id), camera traps were deployed several times over several years and each deployment time frame has a deployment_id. My table data ...
Mark's user avatar
  • 29
2 votes
0 answers
22 views

Point pattern analysis suggestions - at risk habitats

I have two point datasets across a state. Locations that have sensitive vegetation and locations of threatened wildlife Recorded locations of damage / degradation occurrences The data as you'd ...
kmgis's user avatar
  • 21
0 votes
0 answers
145 views

Error in R package 'unmarked', when applying function occuMulti()

I'm trying t write an multi-species occupancy model with two species (M. martes and M. foina). However, I get a strange error message every time I try. Here is the model how I want it to work: fit_2 &...
Mark's user avatar
  • 29
1 vote
0 answers
60 views

Statistical test to assess significant difference in landcover selection

I have GPS collar data that I have used extract values to points through ArcGIS Pro on MODIS landcover data. From this I have a record on the number of times the animal has been in each landcover ...
Chelsea_VictoriaS's user avatar
1 vote
3 answers
78 views

Categorising symbology using more than one feature

In my line of work I receive excel spreadsheets with records of notable/protected species in a particular area. I would like to style them so that the shape denotes their Taxon Group, and their colour ...
EL2404's user avatar
  • 11
1 vote
1 answer
289 views

Categorising points layer using multiple values in QGIS

I've imported wildlife species sightings with individual sightings plotted. I now want to be able to display these sightings with more detail, firstly by assigning a shape to the "Class" (e....
Max's user avatar
  • 19
0 votes
0 answers
88 views

Creating line feature from two points that doesn't intersect with land / polygon feature using ArcGIS Pro

I have some marine fish species data that is mark-recapture data i.e. coordinates for a fish tagged with a plastic ID tag and coordinates for the same fish recaptured at a later date (identified using ...
Laura Smith's user avatar
2 votes
1 answer
280 views

Using a grid code to visualize habitat values

I am working on wildlife and agriculture data in a region where I am attempting to layer the different types of habitat to show the total value of a parcel. For example, I have layers for endangered ...
Nicole Reed's user avatar
0 votes
0 answers
196 views

Maxent SDM projections coming up almost entirely blue

I have been generating SDM models and projections in Maxent. I have had some success with one set of variables (some Hydroshed variables mixed with World CLIM variables); however, I am having a bit of ...
GoingForGasps's user avatar
9 votes
5 answers
349 views

Digitising animal positions in aerial photos

Digitizing objects from orthophotos can be done using QGIS. It is just a matter of establishing a points vector layer with the right attributes and working through the QGIS user interface. Counting ...
ragnvald's user avatar
  • 3,191
1 vote
0 answers
61 views

Overstory-understory classification from discrete return aerial LiDAR

I have an opportunity to collaborate with bat biologists who are interested in predicting probability of roost occurence in seasonally flooded ponderosa woodland. We suspect that both properties of ...
kdoherty's user avatar
8 votes
4 answers
1k views

Extract date, time and GPS position linked to road crossing

I am using QGIS. I have a large dataset of approx a hundred animals and I want to determine the number of successful road crossings and extract the date, the time and the two GPS coordinates before ...
Rubén Portas's user avatar
2 votes
1 answer
104 views

Network service area mapping over open ground

Given a timestamped start location, a timestamped end location and a known average speed is there any way I can map everywhere someone (or something) could have possibly been between the two ...
Liam's user avatar
  • 21
1 vote
0 answers
90 views

Calculate % agriculture and % forestry cover across each 10km square of the UK

I am working on investigating the relationship between agricultural intensity and the diversity of birds. I have a shapefile of a map that splits the UK into 10km squares and for each square I need to ...
Bex Jenkins's user avatar
5 votes
0 answers
321 views

Quantifying similarity between two independent areas using R [closed]

I'm assessing areas for suitability for species relocations, so essentially I'm looking to quantify how similar a possible relocation site is to a source site in several metrics. The species may ...
Roasty247's user avatar
  • 189
0 votes
1 answer
479 views

Why do moving window neighborhood analysis when building habitat model using ArcGIS Desktop?

I am currently developing a habitat model within ArcGIS Desktop for coyotes as a final project. One of the papers I read for my research did something similar, but they used a moving neighborhood ...
Karl Johnson's user avatar
6 votes
2 answers
605 views

Calculating daily travel distance from large dataset using QGIS?

My dataset is around 200 days worth of data on the daily distance travelled by a troop of monkeys. I've never properly used QGIS on my own so don't really know where to start. All of the days are ...
Annie Bailey's user avatar
1 vote
2 answers
98 views

SDM: Dealing with coarse environmental data

I wish to determine the most important environmental covariates controlling a species distribution. I have a large collection of species presence data for a small survey area (e.g., 600 presence ...
user135563's user avatar
4 votes
1 answer
151 views

Automatic polygon placement from trail

I have a shapefile with >300 points that correspond to the points where vegetation survey plots were carried out 10m from the road on both sides. Plots have the dimensions 20mx50m. The attributes ...
Nebulloyd's user avatar
  • 405
2 votes
0 answers
849 views

Choosing bandwidth and scaling factor for Kernel Density Estimate in ArcGIS Desktop?

I have some points that represent animal locations over the course of a few months at the scale of ~20 sqkm. I am emulating the work of previous researchers in this field, but I'm having trouble ...
PIJA's user avatar
  • 61
6 votes
2 answers
3k views

Adding attribute features from the intersection of a grid with a point shapefile?

I want to calculate the frequency of observation of an animal in a forest habitat within the different zones of my study area. To do this I will use the simple equation (number of individuals)/(survey ...
Nebulloyd's user avatar
  • 405
5 votes
2 answers
59k views

Error in (function (classes, fdef, mtable) : unable to find an inherited method for function ‘shapefile’ for signature ‘"NULL"’

I've used the following code to generate home range isopleths using r: library(rhr) library(rgeos) #list all *.txt files. fls <- list.files(path = "C:/Users/evan/Desktop/mydir", pattern = "*.txt",...
J.W. Powell's user avatar
2 votes
1 answer
21k views

Error: undefined columns selected

My question is simple and hopefully can be answered quickly. I have a code in R that is for calculating home ranges. Everything works except one line of the code, which I've included here: locoh <-...
J.W. Powell's user avatar
2 votes
1 answer
102 views

Method for Spatial Analysis of Raptor Predation using ArcMap

I currently have presence data on two birds, a falcon species and the grouse that it prefers to hunt. These data are in two point shapefiles, one for each species. The grouse shapefile represents all ...
Adam's user avatar
  • 23
2 votes
0 answers
67 views

How to create a surface area that interpolates and visualizes trends in physical activity in ArcGIS?

I have a dataset that contains several hundred telemetry points for my focal species around twilight hours. Attached to these points are mean values that represent how active the animal was 10 ...
Redskies421's user avatar
5 votes
1 answer
226 views

Relative position of nodes

I am studying bird movements and have tracked their locations, ie from flower 1 to flower 2 to flower 3 etc. Each point is mapped out. I am trying to work out the relative direction for each movement ...
Jay Edwards's user avatar
1 vote
0 answers
300 views

How Can I extract region-specific Information from ascii grid file in and run spatial GLM's in R?

I have data on various climate variables in acsii grid format. I have imported data into R using Rainfall<-read.asciigrid("E:/R Learning Project/Rainfall.txt") and then used plot(Rainfall) to ...
Sam's user avatar
  • 21
1 vote
2 answers
703 views

How to make input data in MaxEnt with several occurences at the same coordinates?

I have insect traps data with several hundreds insects caught every day. In this paper, authors say "Running the model using the number of mosquitoes per trap-night resulted in clustering of high ...
Cobactan's user avatar
  • 133
1 vote
0 answers
758 views

Generating a predictive map with standardized variables

I have a model from which I am attempting to create a predictive map (in GIS, but I'm aware of some options in R). The response values are constrained to [0,1] using an offset term in the model (see ...
Beth S.'s user avatar
  • 83
3 votes
3 answers
1k views

Saving separate output files when iterating ArcGIS model?

I need to run a model in ModelBuilder 1000 times in order to obtain the average distance of random points in a wildlife species' home range to anthropogenic features. I need to find the average of the ...
user30699's user avatar
5 votes
1 answer
288 views

Anyone have recommendations on data collection system for bird point counts?

We will be conducting point counts this spring and summer, and would like to move away from paper data entry forms (yeah, I know). I have spent a little time exploring ArcPad (10), there are ...
M. Andersen's user avatar