UPA Perpustakaan Universitas Jember

Analysis of tree interactions in a mixed Mediterranean pine stand using competition indices

CATTANEO1 Nicolas - Personal Name
BRAVO-OVIEDO1,2 Andres - Personal Name
BRAVO1,3 Felipe - Personal Name

Studying species interactions in mixed forests allows us to assess their potential benefits and adapt current silvicultural tools developed in monospecific stands to multi-specific stands. We analyzed tree interactions in a Pinus halepensis Mill. and Pinus pinea L. mixed plantation using individual tree neighborhood models and competition indices that accounted for symmetric and asymmetric competition, to analyze whether the growth of each species was better explained by symmetric or asymmetric competition. We also split the competition indices into their intra- and interspecific forms, to test for competition effects on growth change based on competitor identity. Finally, we analyzed whether P. halepensis and P. pinea trees had different growth responses to competition. When calculating competition indices, we explored how spatial information and size of competitor trees contributed to the quantification of the process. Competition measurements were optimized to more precisely describe interactions. Results showed that the inclusion of competition indices generated important improvements in growth models. The main mode of competition was symmetric, which could be related to water restrictions typical of the Mediterranean climate. Considering competitor identity did not improve the growth models, while measurement without discriminating competitors by species generated more parsimonious models. P. halepensis and P. pinea trees had similar growth responses to competition, indicating that the two species cope with competition in similar ways. However, P. pineashowed lower average growth than P. halepensis in the period analyzed. Results suggest that preventing the onset of intense interspecific competition processes could help slow down the long-term replacement of P. pinea by P. halepensis and could have benefits for silvicultural management in systems with two species that share ecological niches but are capable of gen-erating different goods and services.

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E-Jurnal

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Competition
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Pinus halepensis
Pinus pinea
Mixing effects

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Nicolas Cattaneo1, Andres Bravo-Oviedo12, Felipe Bravo13

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Analysis of tree interactions in a mixed Mediterranean pine stand using competition indices

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NPP. 3509212D1000001

Analysis of tree interactions in a mixed Mediterranean pine stand using competition indices

CATTANEO1 Nicolas - Personal NameBRAVO-OVIEDO1,2 Andres - Personal NameBRAVO1,3 Felipe - Personal Name

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Publisher

Collation

Language

ISBN/ISSN

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Content Type

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Statement of Responsibility

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CATTANEO1 Nicolas - Personal Name
BRAVO-OVIEDO1,2 Andres - Personal Name
BRAVO1,3 Felipe - Personal Name