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Can butterflies evade fire? Pupa location and heat tolerance in fire prone habitats of Florida.

Thom MD, Daniels JC, Kobziar LN, Colburn JR - PLoS ONE (2015)

Bottom Line: Butterflies such as the atala hairstreak, Eumaeus atala Poey, and the frosted elfin, Callophrys irus Godart, are restricted to frequently disturbed habitats where their larval host plants occur.The capacity of these species to cope with fire is a critical consideration for land management and conservation strategies in the locations where they are found.For a species such as E. atala that pupates above ground, a population reduction from a burn event is a significant loss, and so decreasing the impact of prescribed fire on populations is critical.

View Article: PubMed Central - PubMed

Affiliation: North Central Soil Conservation Research Lab, U.S. Department of Agriculture, Agricultural Research Service, Morris, Minnesota, United States of America.

ABSTRACT
Butterflies such as the atala hairstreak, Eumaeus atala Poey, and the frosted elfin, Callophrys irus Godart, are restricted to frequently disturbed habitats where their larval host plants occur. Pupae of these butterflies are noted to reside at the base of host plants or in the leaf litter and soil, which may allow them to escape direct mortality by fire, a prominent disturbance in many areas they inhabit. The capacity of these species to cope with fire is a critical consideration for land management and conservation strategies in the locations where they are found. Survival of E. atala pupae in relation to temperature and duration of heat pulse was tested using controlled water bath experiments and a series of prescribed fire field experiments. Survival of E. atala pupae was correlated to peak temperature and heat exposure in both laboratory and field trials. In addition, E. atala survival following field trials was correlated to depth of burial; complete mortality was observed for pupae at the soil surface. Fifty percent of E. atala survived the heat generated by prescribed fire when experimentally placed at depths ≥ 1.75 cm, suggesting that pupation of butterflies in the soil at depth can protect from fatal temperatures caused by fire. For a species such as E. atala that pupates above ground, a population reduction from a burn event is a significant loss, and so decreasing the impact of prescribed fire on populations is critical.

No MeSH data available.


Related in: MedlinePlus

Plot of eclosion of E. atala following heated water bath treatment.♦ = Successful adult eclosion, X = failure of adult to successfully eclose. Line represents a linear threshold between success and failure of E. atala to eclose into a viable adult following heated water bath treatment. Relative symbol darkness is related to age of pupae at the experiment (pupa age [eclosion status]).
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pone.0126755.g005: Plot of eclosion of E. atala following heated water bath treatment.♦ = Successful adult eclosion, X = failure of adult to successfully eclose. Line represents a linear threshold between success and failure of E. atala to eclose into a viable adult following heated water bath treatment. Relative symbol darkness is related to age of pupae at the experiment (pupa age [eclosion status]).

Mentions: A plot of E. atala survival following the initial water bath heating experiment is displayed in Fig 5. Survival varied by temperature and by duration, with a threshold between success and failure to successfully eclose that is roughly linear in nature. Failure began at about 40°C with a 50 min duration, and can be seen to roughly decrease linearly to 51°C with a 3 min duration.


Can butterflies evade fire? Pupa location and heat tolerance in fire prone habitats of Florida.

Thom MD, Daniels JC, Kobziar LN, Colburn JR - PLoS ONE (2015)

Plot of eclosion of E. atala following heated water bath treatment.♦ = Successful adult eclosion, X = failure of adult to successfully eclose. Line represents a linear threshold between success and failure of E. atala to eclose into a viable adult following heated water bath treatment. Relative symbol darkness is related to age of pupae at the experiment (pupa age [eclosion status]).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4446329&req=5

pone.0126755.g005: Plot of eclosion of E. atala following heated water bath treatment.♦ = Successful adult eclosion, X = failure of adult to successfully eclose. Line represents a linear threshold between success and failure of E. atala to eclose into a viable adult following heated water bath treatment. Relative symbol darkness is related to age of pupae at the experiment (pupa age [eclosion status]).
Mentions: A plot of E. atala survival following the initial water bath heating experiment is displayed in Fig 5. Survival varied by temperature and by duration, with a threshold between success and failure to successfully eclose that is roughly linear in nature. Failure began at about 40°C with a 50 min duration, and can be seen to roughly decrease linearly to 51°C with a 3 min duration.

Bottom Line: Butterflies such as the atala hairstreak, Eumaeus atala Poey, and the frosted elfin, Callophrys irus Godart, are restricted to frequently disturbed habitats where their larval host plants occur.The capacity of these species to cope with fire is a critical consideration for land management and conservation strategies in the locations where they are found.For a species such as E. atala that pupates above ground, a population reduction from a burn event is a significant loss, and so decreasing the impact of prescribed fire on populations is critical.

View Article: PubMed Central - PubMed

Affiliation: North Central Soil Conservation Research Lab, U.S. Department of Agriculture, Agricultural Research Service, Morris, Minnesota, United States of America.

ABSTRACT
Butterflies such as the atala hairstreak, Eumaeus atala Poey, and the frosted elfin, Callophrys irus Godart, are restricted to frequently disturbed habitats where their larval host plants occur. Pupae of these butterflies are noted to reside at the base of host plants or in the leaf litter and soil, which may allow them to escape direct mortality by fire, a prominent disturbance in many areas they inhabit. The capacity of these species to cope with fire is a critical consideration for land management and conservation strategies in the locations where they are found. Survival of E. atala pupae in relation to temperature and duration of heat pulse was tested using controlled water bath experiments and a series of prescribed fire field experiments. Survival of E. atala pupae was correlated to peak temperature and heat exposure in both laboratory and field trials. In addition, E. atala survival following field trials was correlated to depth of burial; complete mortality was observed for pupae at the soil surface. Fifty percent of E. atala survived the heat generated by prescribed fire when experimentally placed at depths ≥ 1.75 cm, suggesting that pupation of butterflies in the soil at depth can protect from fatal temperatures caused by fire. For a species such as E. atala that pupates above ground, a population reduction from a burn event is a significant loss, and so decreasing the impact of prescribed fire on populations is critical.

No MeSH data available.


Related in: MedlinePlus