Términos relacionados

3 resultados encontrados para: AUTOR: Enriquez, Cecilia
  • «
  • 1 de 1
  • »
1.
Artículo
Resumen en: Inglés |
Resumen en inglés

Reefs are known to provide coastal protection and important ecosystem services for many coastlines around the world. Physicalprocesses such as wave damping, sediment transport and nearshore hydrodynamics are closely related to the coastal protectionservices provided by reefs. The steep-fronted bathymetries of reefs cause abrupt wave transformations and wave dampingalongshore, while reef roughness has an important contribution to coastal protection. Five Latin-American case studies arepresented to illustrate the coastal protection offered by reefs and their contribution to wave damping. The methodologies applied(e.g. numerical modelling, field measurements) and reef conditions (e.g. reef degradation scenarios and contribution of reefroughness) are listed. Considerable efforts have been made towards diagnosing, understanding and modelling the hydrodynamictransformations induced by reefs. Based on physical and field surveys, roughness and friction parameters were derived in order toimplement calibrated and validated numerical models. Discussion on the advantages and disadvantages of the different modelsapplied in the study cases is provided as well as on the needs of highlighting physical processes and the analysis of reefhydrodynamics for supporting appropriate ecosystem-based management.


PDF PDF
Resumen en: Inglés |
Resumen en inglés

Background: We assessed metrics of the metazoan parasite infracommunities of the dusky founder (Syacium papillosum) as indicators of aquatic environmental health of the Yucatan Shelf (YS) prior to oil extraction. We sampled the dusky founder and its parasites along the YS, mostly during the 2015 north wind season (November–April). Our aims were: (i) to determine whether the parasite infracommunity metrics of S. papillosum exhibit signifcant diferences among YS subregions; (ii) to determine whether the probability of the occurrence of its parasite species and individu‑ als were afected by environmental variables, nutrients, heavy metals and hydrocarbons at the seascape level; and (iii) to determine whether there were statistical diferences between the parasite infracommunity metrics of S. papillosum from YS and those of Syacium gunteri from the Campeche Sound. Multivariate statistical analyses and generalised additive models (GAMs) were used to examine the potential statistical associations between the contaminants, environmental variables and parasite community metrics, and the maximum entropy algorithm (MaxEnt) was used to characterise the habitat’s suitability for the parasite’s probability of occurrence. Results: We recovered 48 metazoan parasite species from 127 S. papillosum, with larval cestodes and digeneans being the most numerically-dominant. Multivariate analyses showed signifcant diferences in parasite infracommu‑ nity metrics among Western YS, Mid YS and Caribbean subregions, with the latter being the richest in species but not in individuals. The GAM and MaxEnt results indicated a negative efect of top predators (e.g. sharks and rays) removal on parasite metrics. The parasite infracommunities of S. papillosum were twice as rich in the number of species and individuals as those reported for S. gunteri from the Campeche Sound.

Conclusions: The significant differences among subregions in parasite metrics were apparently due to the interruption of the Yucatan current during the north wind season. The fishing of top predators in combination with an influx of nutrients and hydrocarbons in low concentrations coincides with an increase in larval cestodes and digeneans in S. papillosum. The dusky founder inhabits a region (YS) with a larger number of metazoan parasite species compared with those available for S. gunteri in the Campeche Sound, suggesting better environmental conditions for transmis‑ sion in the YS.


3.
Libro
PDF
Índice

I Prólogo
II Introducción
III Reserva de la Biósfera El Triunfo
IV Historia previa a la creación de la Reserva de la Biósfera El Triunfo
V Esbozo de la historia de la Reserva de la Biósfera El Triunfo hasta 2018
Parte I
VI Análisis del conocimiento por grupos taxonómicos
Hongos
Estado actual del conocimiento de los hongos macroscópicos de la Reserva de la Biósfera El Triunfo
Comunidades vegetales
Árboles de la Reserva de la Biósfera El Triunfo
Palmas nativas
Estado actual del conocimiento de plantas epífitas en la Reserva de la Biósfera El Triunfo, Chiapas
Fauna invertebrados
Estudio de los arácnidos de la Reserva de la Biósfera El Triunfo
Coleópteros Melolonthidae y Cetoniidae en El Triunfo, Chiapas, México
Fauna vertebrados
Anfibios y reptiles de la Reserva de la Biósfera El Triunfo, Chiapas, México: estudios y recomendaciones para su conservación y manejo
Diversidad de aves en la Reserva de la Biósfera El Triunfo, Chiapas, México
El pavón, Oreophasis derbianus: estado del conocimiento y perspectivas de investigación y conservación en la Reserva de la Biósfera El Triunfo, Chiapas
Distribución de las aves rapaces diurnas en la Reserva de la Biósfera El Triunfo
Distribución y diversidad de colibríes en la Reserva de la Biósfera El Triunfo
Mamíferos de la Reserva de la Biósfera El Triunfo
Estado de conocimiento actual y prioridades de estudio del tapir centroamericano y felinos silvestres en la Reserva de la Biósfera El Triunfo, Chiapas
Amenazas
Amenazas a la biodiversidad de la Reserva de la Biósfera El Triunfo
Manejo de Recursos
Sustentabilidad en la Reserva de la Biósfera El Triunfo (REBITRI) ¿De qué estamos hablando?
Restauración y conservación de Orchidaceae en la Reserva de la Biósfera El Triunfo y el sureste de México
Especies prioritarias y propiedad de la tierra en El Triunfo

De la colonización y la deforestación a la conservación biológica en la Reserva de la Biósfera El Triunfo
Parte II
VII Análisis del estado de conocimiento de la Reserva de la Biósfera El Triunfo
VIII Apéndice