2007
DOI: 10.1007/s00442-007-0876-y
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Dynamics of colour polymorphism in a changing environment: fire melanism and then what?

Abstract: Studies of whether disturbance events are associated with the changing genetic compositions of natural populations may provide insights into the importance of local selection events in maintaining diversity, and might inform plans for the conservation and protection of that diversity. We examined the dynamics of a colour pattern polymorphism in a natural population of pygmy grasshoppers Tetrix subulata (Orthoptera: Tetrigidae) inhabiting a previously burnt clear-cut area. Data on morph frequencies for wild-cau… Show more

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Cited by 31 publications
(64 citation statements)
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“…Our results nevertheless conform to earlier studies of T. subulata and other species of Tetrigidae, adding further support to the conclusion that pygmy grasshopper color morphs are strongly influenced by genetic cues or epigenetic maternal effects, but little (if at all) affected by posthatch developmental plasticity in response to environmental cues (Nabours 1929;Fisher 1930;Forsman et al 2002;Ahnesjö and Forsman 2003;Karlsson et al 2008).…”
Section: Discussionsupporting
confidence: 91%
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“…Our results nevertheless conform to earlier studies of T. subulata and other species of Tetrigidae, adding further support to the conclusion that pygmy grasshopper color morphs are strongly influenced by genetic cues or epigenetic maternal effects, but little (if at all) affected by posthatch developmental plasticity in response to environmental cues (Nabours 1929;Fisher 1930;Forsman et al 2002;Ahnesjö and Forsman 2003;Karlsson et al 2008).…”
Section: Discussionsupporting
confidence: 91%
“…Our findings enable us to discriminate among the alternative explanations put forward to account for the high incidence of black and dark-colored phenotypes in pygmy grasshopper populations that inhabit recently fire-ravaged areas (Rowell 1971;Karlsson et al 2008). The results of our experiment do not support the hypothesis that pygmy grasshoppers change coloration in response to the black visual background or some physical or chemical cues associated with burnt material.…”
Section: Discussioncontrasting
confidence: 73%
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