Examinando por Materia "Sustratos"

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    Aspectos ecológicos y morfológicos de luidia senegalensis (echinodermata: asteroidea) asociados a la captura incidental de la pesca de arrastre en el sur del Golfo de Morrosquillo, Caribe colombiano
    (2020) Hincapié Moreno, Camila Andrea; Quirós Rodríguez, Jorge Alexander
    Luidia senegalensis, has been the subject of few studies in the colombian Caribbean, currently it is considered a threatened species in various areas of the Caribbean, Brazil and Colombia. For this reason, the objective was to evaluate the ecological and morphological aspects of the L. senegalensis populations incidentally captured by trawling in the southern Gulf of Morrosquillo. For this, samplings were carried out in the months of november 2019 and february 2020 in two sectors of the southern Gulf of Morrosquillo, in which three trawl trawls were carried out in each one taking into account two contrasting climatic seasons (dry and rain), the collected individuals were counted and measured in situ; Additionally, the substrate samples from the two sampling sites were analyzed, obtaining a bottom (muddy-sandy) for Punta Terraplén and (sandy) for Punta Bonita. The average density of L. senegalensis for Punta Terraplén was 0.010 ± 0.005 ind / m², this being higher than the density registered for the Punta Bonita sector, whose value was 0.008 ± 0.002 ind / m². The average of sizes for the largest radius (R) was 7.23 ± 1.63 cm in the rainy season, presenting maximum values of 10 cm and minimum of 2.8 cm and for the dry season there was an average of 7.09 ± 1.56 cm with a maximum value of 11.3 cm and a minimum of 5.3 cm. Punta Terraplén presented an average of sizes for a greater radius (R) equal to 7.31 ± 1.40 cm, this being greater than that registered in Punta Bonita 6.91 ± 1.48 cm. The ecological aspects studied in this research work generate information of great importance to have references associated with the ecology of this species and to be able to lay the foundations for new research.
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    Comunidad Fitoperifítica como indicador del estado trófico de una zona parcelaria del humedal Berlín, Montería, Córdoba
    (Universidad de Córdoba, 2023-12-21) Andrades Mendez, Deihanna; Moncada Buelvas, María Alejandra; Mogollón Arismendy, Marta Judith; Arias Rios, Jorge Enrique; Rodríguez Calonge, Escilda Rosa; Alcaldía de Montería - Secretaria de Planeación, DP Ambiental.
    En este estudio se evaluó el estado trófico de una zona parcelaria del humedal Berlín de la ciudad de Montería, Córdoba, mediante la caracterización y determinación de la diversidad del fitoperifiton en el sitio de estudio; para ello, se desarrolló dos muestreos en seis parcelas dependiendo del sustrato disponible. Se obtuvo una densidad total de 67118 ind/cm 2 de la comunidad fitoperifítica, los cuales están distribuidos en 57 géneros y 46 familias. El phylum Chlorophyta, representó el mayor porcentaje de riqueza, mientras que Bacillariophyta, fue más representativa en cuanto a la densidad. No hubo diferencias significativas entre las densidades de los individuos con respecto al sustrato por estación y muestreo (P> 0.05), el análisis de Bray-Curtis, indicó variabilidad en los datos de similaridad para la relación de los taxones de cada estación y sustrato; la composición y estructura evidencian el estado eutrófico que atraviesa el humedal Berlín.
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    Diversidad taxonómica y funcional de briófitos en diferentes coberturas de un bosque seco tropical, Córdoba-Colombia
    (Universidad de Córdoba, 2020-11-13) Peñate Pacheco, Liliana; Carrillo Fajardo, Merly Yenedith; Gil Novoa, Jorge Enrique
    The alterations in the forest structure cause changes in the microclimatic conditions that affect the taxonomic and functional diversity of sensitive organisms such as bryophytes; Consequently, they can influence the ecological processes that these organisms carry out and their responses to new environments. Objective. Characterize the brioflora in different covers (silvopastoral system (SSP) gallery forest (BG) and high secondary vegetation (VSA)) of a Tropical Dry Forest and the functional groups associated with water regulation. Materials and methods. Three 100 x 10 m transects and free runs were made in each coverage, with humidity, solar radiation and type of substrate recorded. Functional traits associated with water regulation were measured, such as stem width, length and width of the filidia, presence of leaves with amplecting bases, hyalodermis and imbricated filidia. Results. 19 species are recorded, 15 in VSA and 14 in both BG and SSP. The richest families are Fissidentaceae and Lejeuneaceae. The richest substrates are epiphyto-corticola and decomposing organic matter. Six functional groups were identified, which are present in all habitats, with the exception of functional group three (GF3) that was not recorded in BG. Conclusions. The availability of substrates for the bryophytes in the different coverages shows similarity, except for the absence of the epilitic in BG, which contrasts with the prediction, that in coverages with high luminosity and low humidity (SSP), the availability of microhabitats (substrates) it would be lower and therefore its diversity, which was not the case either because the diversity does not present significant variation in the coverage (p = 1), on the other hand, the richness of functional groups associated with water regulation varies between the coverage. In SSP, the richness is lower with respect to VSA and higher than BG, therefore, the results do not clearly show that the coverage with greater solar radiation and less humidity present less richness, but if less frequency and variation in composition, mainly compared to BG.
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    PublicaciónAcceso abierto
    Evaluación del crecimiento del hongo Pleurotus ostreatus (basidiomycota) en distintos sustratos lignocelulósicos (capacho de maíz, hoja de almendro y aserrín de madera) en la Estación Ecológica Las Guartinajas en el municipio de Tierralta-Córdoba-Colombia
    (2020-07-07) Hernández Martínez, Nedy Luz; Montes Fuentes, Gabriel
    The growth of a commercial strain of the Pleurotus ostreatus fungus in different substrate combinations was evaluated and in this way determine the treatment with the best efficiency and performance. The substrates evaluated were corn husk (Zea maiz), almond leaves and wood sawdust. The substrates were immersed in water with 20% sodium hypochlorite for 24 hours in 100 L tanks, subsequently, water was changed twice and 4 kg of quicklime was added for every 100 L of water. 1.0 Kilogram (Kg) of each of the substrates was prepared. The substrates were placed in transparent plastic bags with a capacity of 1.5 kg and seeded with 50 g of the prepared inoculum (5%). The substrates were incubated at 27 ° C and in total darkness, until the mycelium covered all the material. Mycelial growth, time of appearance of primordia, weight of carpophores, biological efficiency and yield were evaluated. In total, 1,792 grams were obtained in total, distributed as follows: 634 grams in treatment 1 (M-Corn 100%), 578 grams in treatment 2 (A- Sawdust 100%), 0 grams in treatment 3 (AL- Almond) 0 grams in treatment 4 (AL- A 50% Almond- 50% Sawdust) 580 grams in treatment 5 (MA 50% Maize- 50% Sawdust) and 0 grams in treatment 6 (AL-M 50% Almond- 50% Corn). In treatments 3, 4 and 6 the death of the mycelium was evidenced.