Questions tagged [ecology]
Ecology is the study of how organisms interact with their environment & each other. Ecology uses some specialized statistical techniques (eg ordination methods). Use this tag to indicate applications of statistics that are unique to ecology or that require a recognition of the ecological context.
407 questions
0 votes
1 answer
19 views
Extreme outlier in real data
I'm looking at the amount of carbon in seven forest pools. For dead trees left on the landscape across many locations and over several harvest retention (logging) treatments, there is an extreme value ...
- 1
1 vote
2 answers
45 views
Using the residuals of a dbRDA analysis as a response in an adonis2 analysis?
I have ecological community data for about 100 sites across the United States, and a question I'm interested in is how and why these communities differ. To answer this, I've calculated taxonomic ...
- 13
3 votes
2 answers
277 views
What statistical test do you use when analysing relation height and species abundance over time [BIOLOGICAL DATA]
We are trying to find the right analysis to perform for our university course Biodiversity and Landscape. We have data from the previous 10 years about species abundance [BB-method] and at which ...
0 votes
0 answers
35 views
Sampling observations from nested groups before ECDF and KS testing
I am creating and comparing ECDFs of percent cover value (0-100%) for three groups of biological observations. The dataset as a whole is large, with over a million observations. The three groups have ...
1 vote
1 answer
76 views
Comparing Shannon Diversity index with GLMMs?
I have a dataset comprised of species count samples across multiple years at different sites but within the same locality(same bay). The samples have been grouped into 2 categories based on the ...
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2 votes
1 answer
120 views
Proper approach to mixed-effects modeling to account for pseudoreplication
I am using R to run mixed-effects models on a rather... complex dataset. Specifically, I have an outcome "Score", and I would like to explore the association between score and a number of ...
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2 votes
0 answers
71 views
Study Organism multiple individuals at a single location, detection or abundance?
I'm doing some stats work for a project focused on rattlesnake habitat usage. I essentially have vegetation surveys at each capture location as well as a paired random location. What's recorded in the ...
- 41
0 votes
0 answers
52 views
Correct use of "Log-transform + 1" for ecological data? [duplicate]
I am conducting an occupancy study using camera trap data with the camtrapR and unmarked packages in R. I encountered convergence issues in my prey–predator co-occupancy model, so I calculated the ...
1 vote
0 answers
94 views
Include Time as a independent variable in the model for an ecological study
I am conducting my master's thesis on the temporal patterns of spore production in two specific species and the environmental drivers associated with these patterns. I began with a visual analysis of ...
8 votes
2 answers
308 views
Testing Hypotheses with Limited Data in an Ecological Experiment. How do I approach my data?
For my bachelor's thesis, I’m investigating the effect of voles and mulch on soil infiltration and saturated hydraulic conductivity (Ksat). I want to test the following three hypotheses: Vole ...
- 155
3 votes
1 answer
234 views
Interpreting Negative Binomial GLM results and model-fit
The goal of the analysis was to: test how much each of the predictor variables can help explain species richness to test the hypothesis a) Geodiversity is positively, consistently and significantly ...
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0 votes
0 answers
42 views
Model for predicting Species Presence Probability given some meteorological variables
I am working on a project where I want to predict the spatial distribution of a species given some variables, for example: Mean average temperature recorded through the year. Cumulative Precipitation ...
1 vote
0 answers
76 views
Calibration with all data: data-poor scenarios [closed]
I’m working on species distribution modeling with binary data (presence / absence, 1 / 0). My target species is extremely rare (prevalence ~0.014), so my dataset is almost all zeros and just a handful ...
- 19
1 vote
0 answers
63 views
How to justify the number of background points in MaxEnt species distribution modeling?
I'm building a species distribution model using MaxEnt with 260 presence points, collected opportunistically within a relatively small study area (a single administrative department in France). I'm ...
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0 votes
0 answers
100 views
Using glmmTMB for testing effect on total abundance data?
I have count data captured across multiple years and sites. I measured the total abundance for each sampling period, and wanted to determine if there is any significant effect due to temperature ...
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