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Updated: Feb 15, 2026

Whole-cell Patch-clamp Recordings for Electrophysiological Determination of Ion Selectivity in Channelrhodopsins
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Predation risk and patch size jointly determine perceived patch quality in ovipositing treefrogs, Hyla chrysoscelis.

William J Resetarits1, Jason R Bohenek1, Tyler Breech1

  • 1Department of Biology, Center for Water and Wetlands Resources, The University of Mississippi, University, Mississippi, 38677, USA.

Ecology
|January 10, 2018
PubMed
Summary

Female treefrogs prefer larger, fishless habitat patches for egg-laying, indicating patch size is a crucial aspect of habitat quality. This behavior influences community assembly in freshwater ecosystems.

Keywords:
colonizationhabitat fragmentationhabitat selectionideal-free distributionimmigrationniche dimensionsoviposition site choicespecies sorting

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Area of Science:

  • Ecology
  • Behavioral Ecology
  • Conservation Biology

Background:

  • Habitat patch size and quality are key determinants of ecological community structure and diversity.
  • Existing ecological paradigms often overlook the interaction between patch size and quality, despite its conservation relevance in fragmented landscapes.
  • Predator presence (fish) influences amphibian behavior, particularly oviposition site selection in treefrogs.

Purpose of the Study:

  • To investigate how patch size, patch quality (predator presence), and their interaction affect treefrog oviposition and calling site selection.
  • To determine if patch size functions as an independent component of habitat quality for treefrogs.
  • To understand the implications of these behavioral choices for species sorting and community assembly in freshwater habitats.

Main Methods:

  • Experimental manipulation of habitat patch size (1.13, 2.54, 5.73 m²) and quality (fish presence/absence of green sunfish and golden shiners).
  • Six replicate experimental landscapes with 36 total patches were established.
  • Observed female oviposition preferences and male calling site selection in a natural population of Hyla chrysoscelis.

Main Results:

  • Females exclusively oviposited in the largest (5.73 m²) fishless patches, demonstrating a preference for both large size and predator absence.
  • Treefrog responses to fish predators were independent of patch size.
  • Male calling site selection largely mirrored female oviposition preferences, though males did not directly drive female choices.

Conclusions:

  • Patch size acts as a significant component of habitat quality for Hyla chrysoscelis, influencing oviposition site selection.
  • Behavioral sorting along patch size gradients, particularly in fishless ponds, can facilitate species coexistence and community assembly.
  • Habitat fragmentation and the resulting variation in patch size and quality can significantly impact species interactions and colonization dynamics.