LEAF ECOPHYSIOLOGICAL TRAITS USED AS A TOOLS FOR ASSESSING FOREST ECOSYSTEMS DISTURBANCE IN DANUBE DELTA
Journal Title: Analele Stiintifice ale Universitatii Alexandru Ioan Cuza din Iasi, Serie noua, Sectiunea II a. Biologie vegetala - Year 2016, Vol 62, Issue 2
Abstract
The purpose of this study is to analyze natural and anthropogenic forest ecosystems in order to establish the functional tools for ecophysiological characterization and monitoring of the investigated sites. Related to leaf traits, the parameters of foliar gas-exchange, specific leaf area (SLA), leaf dry matter content (LDMC) and carbohydrates fractions were analyzed. Four sites (riverside coppices) represented by natural forests and forestry plantations were studied and, a control area the zone with integral protection (Letea Forest, Hăşmacu Mare) was considered; all are located along the Chilia branch from Danube Delta Biosphere Reserve. In plantations, in representative species, the metabolic loss was increased by an enhanced of respiration and transpiration processes, higher than in natural forest ecosystems. Statistical analysis has found significant differences in instant water use efficiency, respiration and leaf dry matter content in species from plantations in comparison with natural forest but not so significant among natural forest and natural reserve (Letea Forest-Hăşmacu Mare) at the p <0.05, level of significance. Furthermore, the native species (Populus alba L., Salix alba L.) had a low specific leaf area (SLA) and a high leaf dry matter content (LDMC) in conditions of habitats of natural/ quasi-natural condition with a lower (semi-controlled) anthropogenic intervention and a high SLA and low LDMC in native species and hybrids poplar at cultivated plantation. The results of this study indicate that representative species are responsive to the habitat conditions indicating the disturbance of the sites and indirectly, the anthropogenic pressure.
Authors and Affiliations
Ligia ACATRINEI
Keywords
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