Virtual ecologist module #4: understanding pseudoreplication…the fun way.

Recently, I reviewed several papers where the statistical analysis was pseudoreplicated. I pointed this out to the authors and made some suggestions to remedy the problem. The responses to the reviewer (i.e. me) came back with several reasons why the authors thought the design was OK (and even preferred). Continue reading “Virtual ecologist module #4: understanding pseudoreplication…the fun way.”

The role of density dependence in manipulating and managing natural populations

Ecologists are frequently challenged with the task of making formal predictions about how populations will respond to different forms of management or perturbations. Continue reading “The role of density dependence in manipulating and managing natural populations”

Should we account for imperfect detection when evaluating patterns in fish abundance?

Our recent paper sheds light on the issue of imperfect detection when evaluating patterns in fish abundance. Continue reading “Should we account for imperfect detection when evaluating patterns in fish abundance?”

Species richness estimators can give misleading results when determining patterns in biodiversity

Some years back I was challenged with the questions of how to track fish species richness through time in a selection of freshwater lakes in Florida. I first started experimenting with some of the simpler nonparametric species richness estimators as I had seen them commonly used to answer questions about patterns in species richness in the ecological literature.

Continue reading “Species richness estimators can give misleading results when determining patterns in biodiversity”

Virtual ecologist module #2: occupancy model design trade-offs

The Virtual Ecologist method is a form of stochastic simulation where the process of collecting, analyzing, and interpreting data are simulated. This post is the second module of the Virtual Ecologist blog series. Continue reading “Virtual ecologist module #2: occupancy model design trade-offs”

Emerging methods for multi-model inference in ecology: inference based on parameter inclusion probabilities

A procedure for model selection has been recently showing up in the ecological literature that seems to have followed the increasing use of Bayesian hierarchical models. Continue reading “Emerging methods for multi-model inference in ecology: inference based on parameter inclusion probabilities”

Effects of antecedent flow patterns on juvenile fish of the Murray River.

Our new paper shows a divergent response between native and non-native floodplain wetland fish of the Murray River to different temporal scales of wetland connectivity to the river.  This finding has implications for the management of native fish communities with environmental flows.  For a copy, click this link or send me an email (dgwinnbr@gmail.com).

Continue reading “Effects of antecedent flow patterns on juvenile fish of the Murray River.”

Novel gear combinations for meeting the assumptions of occupancy models in marine systems.

Our new paper demonstrates how applying novel sampling gear combinations can provide statistical replication that is necessary for fitting a class of hierarchical models of occurrence and abundance that use detection/non-detection data. Continue reading “Novel gear combinations for meeting the assumptions of occupancy models in marine systems.”