Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.3390/f12081093

Ключевые слова: mixed forests, competition, facilitation, niche segregation, tree-ring width, carbon isotopes, oxygen isotopes, water uptake, pinus halepensis mill, quercus ilex l

Аннотация: In the Mediterranean, mixed forests of Aleppo pine and holm oak are widespread. Generally considered a transition stage in the succession towards climax oak communities, niche segregation may also contribute to the prevalence of these communities. So far, there is increasing evidence of hydrological niche segregation, with the two species showing complementary water use and seasonal growth patterns. However, it remains unknown whether interspecific interactions affect the response to climate and the mid-term (decadal) growth and water-use efficiency of pines and oaks in mixed stands. Here, we combined tree-ring chronologies, built on different competition classes within a mixed stand, with a spatially explicit assessment of individual growth and wood carbon isotope discrimination ( increment C-13), as a proxy of intrinsic water-use efficiency, and compared these results with previously reported water uptake patterns. We found that competition with pines modulated the climate response of oaks, whereas pine climate response was insensitive to competition. On the other hand, pine density affected only pine growth, whereas oak competition affected both species. We conclude that the presence of pines had negligible or even positive effects on the oaks, but competition with neighbor oaks limited their ability to recover after drought. Conversely, pines experienced greater drought stress under competition, with both oaks and pines.

Журнал: FORESTS

Выпуск журнала: Vol. 12, Is. 8

Номера страниц: 1093

ISSN журнала: 19994907

Место издания: BASEL

Издатель: MDPI

• Pedro Ferrio Juan (Ctr Invest & Tecnol Agroalimentaria Aragon CITA, Unidad Recursos Forestales, Avda Montanana 930, E-50059 Zaragoza, Spain; Aragon Agcy Res & Dev ARAID, E-50018 Zaragoza, Spain)
• Shestakova Tatiana A. (Woodwell Climate Res Ctr, 149 Woods Hole Rd, Falmouth, MA 02540 USA; Siberian Fed Univ, Lab Ecosyst Biogeochem, Krasnoyarsk 660041, Russia)
• del Castillo Jorge (Univ Lleida, Dept Crop & Forest Sci, Av Alcalde Rovira Roure 191, E-25198 Lleida, Spain; Bioecoturn, Calle Espana 22, E-18198 Granada, Spain)
• Voltas Jordi (Univ Lleida, Dept Crop & Forest Sci, Av Alcalde Rovira Roure 191, E-25198 Lleida, Spain; Joint Res Unit CTFC AGROTECNIO CERCA, Av Alcalde Rovira Roure 191, E-25198 Lleida, Spain)

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