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Towards precision ecology: Relationships of multiple sampling methods quantifying abundance for comparisons among
Benjamin D Hoffmann1, Magen Pettit1
1Commonwealth Scientific and Industrial Research Organisation, Health & Biosecurity, Tropical Ecosystems Research Centre, Winnellie, Northern Territory, Australia.
Plos One
|June 15, 2022
Summary
Comparing ant abundance sampling methods is crucial for ecological understanding. Pitfall traps reliably detect yellow crazy ants (A. gracilipes), while card counts are least reliable, and tuna lures are intermediate.
Area of Science:
- Ecology
- Entomology
- Conservation Biology
Background:
- Comparing ant abundance data across studies is challenging due to varying sampling techniques.
- Standardized methods are needed for a holistic understanding of ant ecology and abundance.
- The yellow crazy ant (Anoplolepis gracilipes) is an invasive species requiring effective monitoring.
Purpose of the Study:
- To compare the reliability of three common ant sampling methods: pitfall traps, card counts, and tuna lures.
- To determine the relationships between these sampling techniques for Anoplolepis gracilipes abundance.
- To assess the utility of these methods across different population densities and inform future ecological studies.
Main Methods:
- Conducted sampling using pitfall traps, card counts, and tuna lures in the same location.
- Recorded Anoplolepis gracilipes abundance data for each method.
- Analyzed the relationships and reliability of each sampling technique.
Main Results:
- Pitfall traps were the most reliable for detecting Anoplolepis gracilipes presence (9.1% zero values).
- Card counts were the least reliable (67.1% zero values), suitable only for high abundance.
- Tuna lures provided intermediate reliability (30.1% zero values) and showed the strongest correlation with pitfall traps.
Conclusions:
- Pitfall traps are the most effective method for confirming Anoplolepis gracilipes presence at the sample level.
- Tuna lures are useful for quantifying worker presence but have limitations.
- Standardizing sampling protocols considering environmental and biological variations is essential for advancing ecological precision.
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