“... invasive species, and price of the tour. On average the Galapagos tourist would be willing to pay slightly...”
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“...Elongate hemlock scale (Fiorinia externa) is an invasive species from Japan that was first detected...”
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“... and invasive species. Growth in the open was negatively correlated with understory survival...”
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“...Competition with non-native invasive species is considered a major threat to many rare native...”
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