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Related Experiment Video

Updated: May 29, 2026

Trajectory Data Analyses for Pedestrian Space-time Activity Study

Trajectory Data Analyses for Pedestrian Space-time Activity Study

Published on: February 25, 2013

Predictors of occupancy trend across spatial scale.

Michael A Patten^1,2, Brenda D Smith-Patten¹

¹Oklahoma Biological Survey, University of Oklahoma, Norman, OK 73019, U.S.A., email mpatten@ou.edu.

Conservation Biology : the Journal of the Society for Conservation Biology

|September 3, 2011

Summary

This summary is machine-generated.

Local bird extirpation risk is influenced by forest dependence and diet, not just global factors like range size. Small-bodied birds are particularly vulnerable, highlighting the need for localized extinction probability studies.

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Last Updated: May 29, 2026

Trajectory Data Analyses for Pedestrian Space-time Activity Study

Trajectory Data Analyses for Pedestrian Space-time Activity Study

Published on: February 25, 2013

Area of Science:

Ecology
Conservation Biology
Ornithology

Background:

Global extinction risk assessments may not fully capture local extirpation drivers.
Understanding species-specific vulnerabilities in deforested areas is crucial for targeted conservation.

Purpose of the Study:

To identify factors predicting increased extirpation probability for bird species in Palenque, Mexico.
To compare local extirpation predictors with those identified in global extinction risk studies.

Main Methods:

Utilized nearly annual presence-absence data for >200 bird species over 40 years.
Assessed associations between long-term species presence trends and ecological traits (body size, diet, forest dependence, etc.).
Employed weighted logistic regression and model ranking to determine predictor importance.

Main Results:

Global predictors like large body size and small geographic range were not consistently associated with local species loss.
Forest dependence strongly correlated with declining species occurrence, with high-dependence species showing the steepest decline.
Diet and foraging strata interactions were significant, with some groups increasing and others decreasing in occurrence.

Conclusions:

Local-scale analyses are essential for accurately assessing extirpation risk.
Species' reliance on forest habitat and specific dietary niches are key local drivers of population decline.
Conservation strategies must consider localized ecological factors beyond global threat assessments.