Stem CO2 Efflux as an Indicator of Forests’ Productivity in Relict Juniper Woodlands (Juniperus thurifera L.) of Southern Spain
| Autor: | Iván Pérez Anta, Eva María Rubio, Manuela Andrés Abellán, Francisco Antonio García Morote, Francisco Ramón López Serrano, Francisco García Saucedo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Mediterranean climate
biology slow-growing species fungi Q10 Forestry semi-arid climate Woodland Seasonality biology.organism_classification medicine.disease Spanish juniper stem respiration relict forests Juniperus thurifera temperature coefficient Productivity (ecology) Agronomy thermophilic woodlands Semi-arid climate medicine Ecosystem Juniper QK900-989 Plant ecology |
| Zdroj: | Forests Volume 12 Issue 10 Forests, Vol 12, Iss 1340, p 1340 (2021) |
| ISSN: | 1999-4907 |
| Popis: | There are considerable uncertainties about the C cycle in semi-arid ecosystems. Hence, studies that have focused on Juniperus in Mediterranean woodlands are non-existent. This study provides a survey of the effect of the juniper woodland type (young and mature woodlands joint effect of maturity and forest productivity) on stem respiration. We checked the seasonal variation of stem respiration, evaluating the effects of stem temperature on stem CO2 efflux. For this, we measured the stem CO2 efflux (µmol CO2 m−2 s−1) over the four seasons on 16 junipers using LI-6400 equipment. The results showed that in the more productive site (young woodland), the stem CO2 efflux was higher. This variable followed a clear seasonal trend, being higher during the spring and progressively decreasing in cold periods. In both juniper woodlands, and especially in the older forests, the Q10 coefficients were low (< 2), typical of cold forests and slow-growing species. The exponential model also confirmed that the Q10 was significantly higher in young juniper trees. Thus, stem CO2 efflux was an indicator of the growth in this juniper woodland that is well adapted to a semi-arid climate. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|