Characterization of black mangrove (Avicennia germinans) and red mangrove (Rhizophora mangle) ecosystems in Paraiso, Tabasco, Mexico

Abstract

Objective: The characterization of black and red mangrove ecosystems in the coastal zone of Paraiso, Tabasco, Mexico.

Design/methodology/approach: Four plots were randomly set in each mangrove ecosystem. Inside each plot, trees were counted, and measured for basal area, DBH, vegetation cover and height. We estimated seven diametric classes to calculate the relative species richness and emergence/disappearance dynamics in both ecosystems. Soil samples were survey at two depths and during different seasons (dry and rainfall), the samples were tested for organic matter (OM), soil organic carbon (SOC), nitrogen content (N), phosphorus (Olsen P), pH, exchangeable bases and humic and fulvic acids; with the objective to characterize nutrient flux dynamics between seasons and compare the two mangrove ecosystems.  

Results: Red mangrove ecosystems contains higher OM during rainy season. Black mangrove ecosystems showed low contents of OM and exchangeable bases during dry season. More species richness was achieved by red mangroves, and black mangroves presented higher and thicker trees.                

Limitations on study/implications: Regional characterization of mangrove ecosystems provide information about nutrient flux, which is necessary to the adequate proposal of protection and conservation programs of these wetlands.

Findings/conclusions: Dominant mangrove specie affect nutrient flux in soils associated to these ecosystems, suggesting they have specific functions in the ecosystem dynamics.