Estado de las poblaciones de Laguncularia racemosa var. glabriflora (Combretaceae) en el Golfo de Guayaquil, Ecuador.
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2021-03
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Facultad de Ciencias Naturales. Universidad de Guayaquil
Resumen
Se realizó un censo de Laguncularia racemosa var. glabriflora en el Golfo de Guayaquil, el objetivo fue evaluar el estado de las poblaciones en esta región. Durante diciembre 2020 y enero 2021 se establecieron 10 parcelas de forma rectangular, cada una con una superficie de 50 x 20 m (1.000 m2), abarcando un área total de 1 hectárea (10.000 m2) en las provincias del Guayas y El Oro, en la costa de Ecuador. Laguncularia racemosa var. glabriflora habita predominantemente manglares ribereños y suelos lodosos (mayoritariamente limo) de textura floja, con salinidad intersticial desde 5 hasta 38 UPS, la mayor densidad poblacional se registró en las localidades que poseen entre 20 a 35 UPS. Las poblaciones registradas poseen poco desarrollo estructural, correspondiendo un 56% en la categoría diamétrica Latizales (5≤DAP≥9,9 cm DAP). En el Golfo de Guayaquil las dos variedades de L. racemosa son marcadamente simpátricas (80% de las parcelas censadas), éstas florecen y fructifican simultáneamente sin haberse detectado evidencia de variabilidad morfológica o hibridación. Consecuentemente, se recomienda una revisión de su estatus de variedad.
A census of Laguncularia racemosa var. glabriflora in the Gulf of Guayaquil, the objective was to evaluate the status of the populations in this region. During December 2020 and January 2021, 10 rectangular-shaped plots were established, each with an area of 50 x 20 m (1,000 m2), covering a total area of 1 hectare (10,000 m2) in the provinces of Guayas and El Oro, in the coast of Ecuador. Laguncularia racemosa var. glabriflora predominantly inhabits riparian mangroves and muddy soils (mostly silt) with a loose texture, with interstitial salinity from 5 to 38 UPS, the highest population density was recorded in localities that have between 20 to 35 UPS. The registered populations have little structural development, corresponding to 56% in the Latizales diameter category (5≤DAP≥9.9 cm DBH). In the Gulf of Guayaquil the two varieties of L. racemosa are markedly sympatric (80% of the plots surveyed), they bloom and fructify simultaneously without detecting evidence of morphological variability or hybridization. Consequently, a review of its variety status is recommended.
A census of Laguncularia racemosa var. glabriflora in the Gulf of Guayaquil, the objective was to evaluate the status of the populations in this region. During December 2020 and January 2021, 10 rectangular-shaped plots were established, each with an area of 50 x 20 m (1,000 m2), covering a total area of 1 hectare (10,000 m2) in the provinces of Guayas and El Oro, in the coast of Ecuador. Laguncularia racemosa var. glabriflora predominantly inhabits riparian mangroves and muddy soils (mostly silt) with a loose texture, with interstitial salinity from 5 to 38 UPS, the highest population density was recorded in localities that have between 20 to 35 UPS. The registered populations have little structural development, corresponding to 56% in the Latizales diameter category (5≤DAP≥9.9 cm DBH). In the Gulf of Guayaquil the two varieties of L. racemosa are markedly sympatric (80% of the plots surveyed), they bloom and fructify simultaneously without detecting evidence of morphological variability or hybridization. Consequently, a review of its variety status is recommended.
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LAGUNCULARIA RACEMOSA VAR. GLABRIFLORA, MANGLARES,, SIMPÁTRICA, VARIEDAD