Floristic gradients of herbaceous vegetation and P/N ratio in soil in a Mediterranean area |
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Authors: | Giuliano Fanelli Marco Lestini Alessandro Serafini Sauli |
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Institution: | (1) Dipartimento di Biologia Vegetale, Orto Botanico dell’Università di Roma “La Sapienza”, Largo Cristina di Svezia 24, 00165 Roma, Italy |
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Abstract: | A broad range of herbaceous plant comunities in a Mediterranean Landscape in central Italy, running from heavily urbanized
areas to semi-natural pastures, has been studied. These communities can be easily arranged along a gradient of ruderality.
We inspected which of a series of soil parameters could better explain this gradient (pH, CaCO3, granulometry, N, P, C/N, P/N). We show that (1) the single most important explanatory variable is P/N ratio of soil; (2)
nitrogen and carbon pools in soil are related, in the set of communities studied, with another gradient of decreasingly frequent,
predictable, moderate disturbance such as trampling. We discuss the meaning of these results.
Nomenclature: Anzalone (1994, 1996). |
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Keywords: | Disturbance Nitrogen Nitrophily Phosphorus Ruderality |
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