Variación espacio-temporal del ensamblaje de peces criptobentónicos y conspicuos en dos áreas naturales protegidas, Bahía de los Ángeles y Huatulco

Spatial and temporal variation of the assemblage of cryptobenthic and conspicuous reef fish in two protected natural areas, Bahía delos Ángeles and Huatulco

Rodrigo Daniel Chiriboga Ortega (2023, [Tesis de maestría])

Los peces arrecifales desempeñan roles ecológicos muy importantes manteniendo la salud de los arrecifes siendo limpiadores, recicladores de materia orgánica y además fuente de alimento entre eslabones de la cadena trófica. El presente trabajo busca describir el ensamblaje de peces arrecifales crípticos y conspicuos, y evaluar los patrones espaciales y temporales del ensamblaje de peces arrecifales en Bahía de Los Ángeles, Baja California (BLA) y el Parque Nacional Huatulco (PNH), Oaxaca. Utilizamos dos métodos de muestreo censos visuales y estaciones cerradas. Para evaluar a los peces conspicuos, se realizaron censos visuales empleando transectos de banda de 20x4 m. Para cuantificar la biodiversidad de peces crípticos, se realizaron estaciones cerradas (0.4 m2 ) en donde se utilizó aceite de clavo como anestésico para recolectar los peces arrecifales criptobentónicos (PACr). Las dos metodologías se realizaron en dos gradientes de profundidad (somero; < 5 m y profundo; > 5 m) y en dos estaciones (cálida y fría). Se realizaron curvas de acumulación de especies y un análisis del número efectivo de especies para describir la riqueza y diversidad de cada zona de estudio. Finalmente, para determinar patrones espacio temporales se realizaron análisis nMDS, PERMANOVAS y SIMPER. La riqueza total fue de 43 especies para BLA y 62 para el PNH representando el 80% y 79% del promedio de los estimadores no paramétricos respectivamente. Se aumentó el número de especies registradas a 94 para BLA y 209 para el PNH utilizando las estaciones cerradas. Se observaron diferencias significativas entre estaciones y profundidad en el ensamblaje de PACs de BLA, pero no para los PACr. En el PNH se observaron diferencias significativas para la riqueza y abundancia de los PACr y variación temporal de la biomasa de los PACs. En conclusión se demostró que el uso de métodos de muestreo complementarios mejora la calidad de los inventarios de especies y permite detectar variaciones espacio temporales en la estructura de la comunidad íctica.

Reef fishes perform important ecological roles in maintaining reef health by cleaning and recycling organic material, and by providing a source of food between trophic linkages. The thesis describes cryptic and conspicuous reef fish assemblages and estimates their spatial and temporal patterns of in two sites, Bahía de Los Ángeles (BLA) in the state of Baja California and Huatulco National Park (PNH), in the state of Oaxaca. We used two sampling methods: visual census using SCUBA (band transects of 4x20m) for conspicuous reef fish (PAC) and enclosed stations (0.4 m2) using clove oil to anesthetize and collect the cryptobenthic reef fish (PACr). Sampling was conducted at two depth strata (shallow; < 5 m and deep; > 5m) and during two seasons (warm and cold). We used species accumulation curves and analysis of effective number of species to describe the richness and diversity of reef fish. Finally, nMDS, PERMANOVAS and SIMPER were performed to determine spatial and temporal patterns. The total species richness was 43 species for BLA and 62 species for the PNH, representing 80% and 79%, respectively, of the average of the non-parametric estimators. The number of species increased to 94 for BLA and 209 for PNH using enclosed stations. Significant differences between seasons and depth strata were found for the PACs assemblage at the BLA site, but not for the PACr assemblage. At the PNH site, significant differences were found for the richness and abundance of the PACr assemblage for depth as well as for the seasonal variation of the biomass of the PACs assemblage. In conclusion we demonstrated that the use of complementary sampling methods improves the quality of species inventories and allows for the detection of both spatial and temporal variations in the structure of the reef fish community.

diversidad, peces arrecifales, criptobentónico, biomasa, espacio-temporal biodiversity, reef fishes, cryptobenthic, biomass, spatial-temporal CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CIENCIAS AGRARIAS PECES Y FAUNA SILVESTRE DINÁMICA DE LAS POBLACIONES DINÁMICA DE LAS POBLACIONES

Silage maize as a potent candidate for sustainable animal husbandry development—perspectives and strategies for genetic enhancement

Yogesh Vikal Manje Gowda (2023, [Artículo])

Brown Mid-Rib Genomic Selection CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA BIOMASS SILAGE DIGESTIBILITY GENOME-WIDE ASSOCIATION STUDIES MARKER-ASSISTED SELECTION MAIZE

A 'wiring diagram' for source strength traits impacting wheat yield potential

Erik Murchie Matthew Paul Reynolds Gustavo Slafer John Foulkes Liana Acevedo-Siaca Lorna Mcausland Simon Griffiths A Elizabete Carmo-Silva (2023, [Artículo])

Source-Sink Yield Physiology CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA BIOMASS BREEDING PHOTOSYNTHESIS SOURCE SINK RELATIONS YIELDS PHYSIOLOGY

Radiative transfer model inversion using high-resolution hyperspectral airborne imagery – Retrieving maize LAI to access biomass and grain yield

Ahmed Kayad Francelino Rodrigues Marco Sozzi Francesco Pirotti Francesco Marinello Urs Schulthess Bruno Gerard Marie Weiss (2022, [Artículo])

PROSAIL Vegetation Indices Field Variability Digital Farming CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA PRECISION AGRICULTURE MAIZE GRAIN YIELD BIOMASS VEGETATION VEGETATION INDEX

Conservation agriculture based sustainable intensification: India updates

ML JAT (2021, [Objeto de congreso])

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CONSERVATION AGRICULTURE SUSTAINABLE INTENSIFICATION LAND MANAGEMENT TILLAGE PLANT ESTABLISHMENT BIOMASS WATER MANAGEMENT

Economics of crop residue management

Vijesh Krishna Maxwell Mkondiwa (2023, [Artículo])

More than five billion metric tons of agricultural residues are produced annually worldwide. Despite having multiple uses and significant potential to augment crop and livestock production, a large share of crop residues is burned, especially in Asian countries. This unsustainable practice causes tremendous air pollution and health hazards while restricting soil nutrient recycling. In this review, we examine the economic rationale for unsustainable residue management. The sustainability of residue utilization is determined by several economic factors, such as local demand for and quantity of residue production, development and dissemination of technologies to absorb excess residue, and market and policy instruments to internalize the social costs of residue burning. The intervention strategy to ensure sustainable residue management depends on public awareness of the private and societal costs of open residue burning.

Crop Biomass Residue Burning Environmental Effects CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CROPS BIOMASS RESIDUES ENVIRONMENTAL IMPACT CLIMATE CHANGE SMALLHOLDERS TECHNOLOGY ADOPTION

Seasonal patterns in rice and wheat residue burning and surface PM2.5 concentration in northern India

Carlo Montes Tek Sapkota Balwinder-Singh (2022, [Artículo])

Biomass Burning Emission Inventory Active Fires CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA AIR QUALITY BIOMASS BURNING EMISSION FIRES

Efficacy of pre- and post-emergence herbicide combinations on weed control in no-till mechanically transplanted rice

PRATEEK MADHAB BHATTACHARYA Apurba Chowdhury Tapamay Dhar Md. Saiful Islam Alison Laing Mahesh Gathala (2022, [Artículo])

Mechanized Transplanted Rice Weed Biomass Weed Density Weed Control Efficiency CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA HERBICIDES WEED CONTROL RICE ZERO TILLAGE MECHANIZATION

Socio-spatial segregation of socio-environmental assets of public green spaces in the city of Durango, Mexico

Carlos Alejandro Custodio González Tania Ortiz Patricia Catalina Medina Pérez (2024, [Artículo, Artículo])

The current development model's accumulation logic has resulted in the emergence and consolidation of social processes like segregation, leading to differentiated access and availability of urban goods and services among social groups based on socioeconomic, ethnic, or societal standing. The current development model's accumulation logic has resulted in the emergence and consolidation of social processes like segregation, leading to differentiated access and availability of urban goods and services among social groups based on socioeconomic, ethnic, or societal standing. This disparity impacts employment levels, educational performance, urban decay, and environmental degradation. In this context, the article aims to examine the socio-spatial segregation in the access to socio-environmental amenities provided by public green spaces (EVP) in a medium-sized city, specifically Durango, Mexico. The analysis utilizes spatial analysis and statistical methods that involve five variables associated with EVPs: surface area, percentage, number, density, and the socioeconomic level of the population. A spatial pattern of segregation was identified through these variables, resulting in four clusters that impact how the city of Durango is inhabited, produced, reproduced, lived, and constructed.

sociospatial exclusion public space spatial autocorrelation spatial patterns spatial justice exclusión socioespacial espacio público autocorrelación espacial patrones espaciales justicia espacial CIENCIAS SOCIALES CIENCIAS SOCIALES

Análisis de cuatro variables del período de lluvias asociadas al cultivo de maíz temporal

Analysis of four variables associated with rainy seasonal in maize cultivation

MAURO IÑIGUEZ COVARRUBIAS WALDO OJEDA BUSTAMANTE CARLOS DIAZ DELGADO (2013, [Artículo])

Caracterizar y conocer las variables: inicio, duración, terminación de la estación lluviosa y la cantidad de precipitación con fines de precisar su magnitud y relacionarlas con la agricultura bajo condiciones de temporal, es y ha sido una preocupación importante para los agricultores y estudiosos de las ciencias agrícolas. En la región centro norte de México este problema se acentúa por la alta variabilidad de la estación lluviosa y la gran dependencia climática de la agricultura de temporal. La metodología indicada recrea cuatro variables climáticas de la estación lluviosa, analizadas por métodos reconocidos, y con base en un análisis probabilístico se asocian a la agricultura del cultivo del maíz de temporal. El estudio fue realizado para la región ubicada en el sur del estado de Zacatecas, México, sobre la estación climatológica Tlaltenango.

Agricultura de temporal Lluvias Cultivos alimenticios INGENIERÍA Y TECNOLOGÍA