![]() racemosa wood and bark characters related to flooding periodicity nevertheless, this species is the only one growing under a wide range of environmental conditions in the estuarine river El Conchal which experiences more than eight months of flooding and salinity conditions that only These authors did not detect significant differences for Wood and bark anatomy variation in four species growing in a mangrove forest has been evaluated in relation to flooding periodicity (Yáñez-Espinosa et al. Moreover, few studies have been carried out on mangrove species in which their wood structure is correlated with environmental factors (Panshin 1932 Jansonnius 1950 van Vliet 1976, 1979 Carreras 1988 Yáñez-Espinosa and Terrazas 2001). The anatomy of mangrove woods has been studied extensively because of their economic importance and to correlate structure with physiological specialisation towards the mangrove habitat (Tomlinson 1986). In north-western Mexico, poles are sold to build wooden frames for drying tobacco leaves and to be incorporated as tutors for horticultural crops such as tomatoes (Valdez 2001). It is used for local house construction, poles, fences, sticks for fish trapping, tool handles, carpentry, boat framing, as well as for fuel (Niembro 1986). racemosa does not have industrial uses (Pennington and Sarukhán 1998). Racemosa grows in low swales or point bar deposits frequently associated with Rhizophora mangle L. Along rivers or estuarine channels with a high influence of freshwater runoff and frequent tidal inundation, L. Racemosa is generally found associated withĪvicennia germinans (L.) Stearn. It is commonly restricted to elevated soils on the landward fringe of the mangrove forests where tidal inundation is less frequent and less intense, but it also grows in the basin mangrove forests where tidal flushing is limited, and it colonizes disturbed sites where it can form pure stands (Tomlinson 1986). The species grows under a wide variety of conditions. 1971 Rzedowski 1978 Pennington and Sarukhán 1998). is a common component of mangrove forests along the Pacific and Atlantic coasts of Mexico (Flores et al. racemosa wood harvesting should avoid those sites with high flooding level, high sand particle percentage and high salinity that may modify wood quality. Anova (analysis of variance) revealed non-significant differences among sites for flexibility, rigidity and Peteri coefficients as well as for Runkel ratio, however the rigidity coefficient is affected by occurrence of gelatinous fibres. racemosa trees growing in those sites with a high sand particle percentage and a lower flooding level. Correlation analysis confirmed that the higher the percentage of gelatinous fibres, the longer the fibres. ![]() ![]() ![]() ![]() Analyses revealed that in sites with high salinity and flooding levels, there are more abundant vessels and axial parenchyma although the fibres and vessel elements are shorter, suggesting a water stress effect. Trees were sampled in six sites along the river where different flooding periods and levels occur. Laguncularia racemosa anatomy variation was evaluated to identify which cell features, mainly fibre features, are related to an environmental gradient and how this variation affects wood quality. Laguncularia racemosa wood is commonly used in north-western Mexico and harvested without the knowledge of whether environmental conditions affect wood quality. ![]()
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