Estructura, Composición Florística Y Diversidad Del Matorral Espinoso Tamaulipeco, México

Abstract

ResumenLa presente investigación tuvo la finalidad de evaluar la composición y la diversidad de las especies arbóreas y arbustivas de un área de referencia del matorral espinoso tamaulipeco (MET). Se establecieron cuatro sitios de muestreo de 40 × 40 m en un área del MET, donde se realizó un censo de todos los individuos (d 0.10 m > 5 cm). Se registró información dasométrica de altura (h), diámetro (d 0.10 m ) y cobertura de copa. Se determinaron las variables estructurales de abundancia AbstractThis research aimed to evaluate the structure, floristic composition and diversity of tree and shrub species of a reference community of Tamaulipan thornscrub (MET). We recorded the total number of trees (d 0.10 m > 5 cm) in four 40 × 40 m sampling sites. Height (h), diameter (d 0.10 m ) and canopy cover were recorded, and abundance (AR i ), dominance (DR i ), frequency (FR i ), Importance Value Index (IVI), Margalef index (D Mg ), Shannon-Weaverr index (H') were calculated. There were a total 21 species, distributed in 20 genus and 14 families. Fabaceae was the most speciose family, with seven species. The most common species in the community were Acacia amentacea (IVI = 24.94 %), Diospyros texana (15.57 %) and Havardia pallens (13.01 %). The studied community had a diversity index of H' = 1.94 and Margalef species richness of D Mg = 2.0.

Tamaulipan thornscrub after fire: an analysis of the composition of species

“…It is important to mention that the total covered area recorded was 602.2 m 2 ha -1 , which represents an extremely low coverage, since 93.7% of the surface is found without vegetation due to the fire. The importance value index of the present study reports C. boissieri as the most important species (see Table 2), since in other MET study C. boissieri has not been reported with the highest importance value index (Alanis Rodríguez et al, 2008;Jiménez Pérez et al, 2012;Pequeño Ledezma et al, 2012;Mora Donjuán et al, 2013). The previous has great relevance, since it supposes that it is a pioneering post-fire species of the Tamaulipan thornscrub.…”

“…For the estimation of biodiversity, the Margalef index indicates a high species richness (D Mg 3.16) when compared to other regenerated areas of the MET (Jiménez Pérez et al, 2012;Mora Donjuán et al, 2013) or studies in temperate forest ecosystems such as Alanís Rodríguez et al (2010), with 1.59 and González Tagle (2005) with 1.5 as maximum values in this index. For the true diversity, which encompasses the abundance of species, it shows a value of 16.44.…”

“…Tamaulipan thornscrub (MET) is an abundant ecosystem historically used by local people in northeastern Mexico, in activities such as logging and forage for cattle; it has high specific richness and density of shrubs and trees (Heiseke and Foroughbakhch, 1985;Alanís Rodríguez et al, 2008;Mora Donjuán et al, 2013).…”

Composition, structure and diversity of a mesquite in Pesquería (Northeastern Mexico)

“…The evaluated community has a coverage of 66% (6,600 m 2 /ha), which means that 34% of the area is devoid of vegetation. This may be due to the fact that only individuals greater than 5 cm in diameter were considered, since for similar communities in Northeastern Mexico that considered smaller individuals, coverage greater than 100% (13,973 m 2 /ha) was recorded, which denotes a considerable overlap of crowns [31]. Table 3 Absolute Abundance (N/ha) and proportional abundance (of the total, and in the zone) with respect to height strata of the registered species.…”

“…However, the evaluated area showed values of D Mg = 2.50 and H′ = 2.28, and these values are similar to those recorded for other xerophilic scrubs. Mora-Donjuan et al [31] evaluated a reference area of Tamaulipan thorn scrub (TTS) and recorded D Mg = 2.26 and Diversity H = 1.94. They are also similar to those recorded by Jiménez-Pérez et al [38], who evaluated the diversity of a regenerated TTS community with agricultural history in Northeastern Mexico and obtained values of D Mg = 2.17 and alpha diversity H′ = > 2.…”