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  • Avian point count data from the Ice Storm Experiment (ISE) plots
  • Leuenberger, Wendy M; SUNY College of Environmental Science and Forestry
    Parry, Dylan; SUNY College of Environmental Science and Forestry
  • 2020-06-19
  • Leuenberger, W.M. and D. Parry. 2020. Avian point count data from the Ice Storm Experiment (ISE) plots ver 1. Environmental Data Initiative. https://doi.org/10.6073/pasta/a3b6394bb75893b076dce82158b74f5c (Accessed 2024-03-28).
  • Large-scale disturbances such as ice storms may increase in frequency and intensity as climate changes. While disturbances are a natural component of forest ecosystems, climatically driven alteration to historical patterns may impart fundamental change to ecosystem function. At Hubbard Brook Experimental Forest, NH, experimental ice storms of varying severity were applied to replicate plots of mature northern hardwoods to quantify their effects on forested ecosystems. We assessed ice storm treatment effects on insectivorous foliage-gleaning birds and their interactions with larval Lepidoptera. These birds are charismatic, of conservation concern, and are a major predator of caterpillars. In turn, lepidopterans are the dominant herbivores in temperate forests and are integral to ecosystem function. We predicted that avian abundance would increase due to additional structural heterogeneity caused by ice treatments, with a concomitant increase in caterpillar predation.

    Point counts were used to measure insectivorous bird activity in the ice storm experiment plots and additional control plots before and after treatments. Point counts were conducted in June 2015 and June 2016. Icing occurred in January-February 2016. We deployed and retrieved plasticine model caterpillars and estimated predation from characteristic marks to these surrogates. Abundance of foliage-gleaning birds was higher in the ice storm plots and birds responded to treatments as a single diffuse disturbance rather than on an individual plot level. All species except one were observed both before and after the ice treatments. Surprisingly, predation on caterpillar models was unaffected by ice storm treatments but rather was a function of caterpillar density. The increase in avian abundance in the ice storm treatment plots corroborates other studies of bird responses to relatively small-scale disturbances in forests and the limited change in species composition was expected given the plot size. We conclude that ice storms may provide beneficial changes for foliage-gleaning birds in the growing season following the disturbance.

    A complete analysis of these data can be found in: Leuenberger, W. M. (2017). Response of larval lepidoptera and their avian predators to experimental ice storms in a northeastern forest (Order No. 10282770). Available from ProQuest Dissertations & Theses A&I. (1950488566).

    These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.

  • N: 43.9362      S: 43.935      E: -71.7557      W: -71.7592
  • knb-lter-hbr.264.1  (Uploaded 2020-06-19)  
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  • https://doi.org/10.6073/pasta/a3b6394bb75893b076dce82158b74f5c
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