A5044288720- Isotope Analysis in Ecology
- Marine and fisheries research
- Marine animal studies overview
- Marine Bivalve and Aquaculture Studies
- Coral and Marine Ecosystems Studies
- Marine and coastal ecosystems
- Marine and coastal plant biology
- Marine Biology and Ecology Research
- Heavy metals in environment
- Mercury impact and mitigation studies
- Ichthyology and Marine Biology
- Ocean Acidification Effects and Responses
- Atmospheric chemistry and aerosols
- Geology and Paleoclimatology Research
- Atmospheric aerosols and clouds
- Groundwater and Isotope Geochemistry
- Atmospheric and Environmental Gas Dynamics
- Heavy Metal Exposure and Toxicity
- Wastewater Treatment and Nitrogen Removal
- Aeolian processes and effects
- Water Treatment and Disinfection
- Aquaculture Nutrition and Growth
- Environmental Toxicology and Ecotoxicology
- Analytical chemistry methods development
- Pharmaceutical and Antibiotic Environmental Impacts
Instituto Politécnico Nacional
2013-2024
Weatherford College
2023
Universidad Autónoma de Baja California
1989
Stable isotope analysis in mysticete skin and baleen plates has been repeatedly used to assess diet movement patterns. Accurate interpretation of data depends on understanding isotopic incorporation rates for metabolically active tissues growth inert tissues. The aim this research was estimate blue whale by using natural gradients baseline values between oceanic regions. Nitrogen (δ15N) carbon (δ13C) potential prey were analyzed from three foraging zones (Gulf California, California Current...
Abstract Habitat degradation can affect trophic ecology by differentially affecting specialist and generalist species, the number type of interspecific relationships. However, effects habitat on coral reefs have received limited attention. We compared structure food chain length between two shallow Caribbean similar in size close to each other: one dominated live other macroalgae (i.e., degraded). subjected samples basal carbon sources (particulate organic matter algae) same 48 species...
This study confirms the diet and determines trophic position of bentfin devil ray ( Mobula thurstoni ) spinetail japanica in south-west Gulf California. There has been an active fishery area for these filter-feeding elasmobranchs, which are highly susceptible to exploitation due low fecundity long lifespan. However, information on their basic biology is scarce. δ 13 C 15 N values rays zooplankton (sorted according level: herbivores, carnivores omnivores) were determined over a period 11...
Carbon and nitrogen stable isotopes fatty acids (FAs) revealed primary producer organic carbon sources that fuel a coral reef food web with river influence. A isotope mixing model was used to assess the relative contribution of six different producers nine most ubiquitous invertebrate fish consumer's bulk carbon. Mangrove phytoplankton were difficult differentiate in some consumers; likely solutions involved one or other but not both at same time. FA concentration upper trophic levels...
Metal pollution is a significant environmental and health problem in aquatic ecosystems worldwide, particularly coastal systems impacted by emissions from thermoelectric plants, as the case of Tampamachoco lagoon. To evaluate seasonal contamination levels Cd, Pb, Cr, Cu species commercial interest lagoon estimate risk associated with their consumption, total 180 fish, 90 oysters (Crassostrea virginica), 27 crabs (Callinectes sapidus), 24 shrimp (Litopenaeus setiferus) were sampled....
Total organic carbon (TOC) content, total nitrogen (TN) elemental (C and N), isotopic (d13C-TOC) composition of matter derived from both marine terrestrial sources constrain the relative contributions productivity, mangroves, continental wind erosion 36 carbonate-free surface sediments along southwestern coast Baja California Peninsula. In general, spatial patterns TOC, TN, C:N ratio d13C-TOC are similar. The maximum content TOC (14.5%) TN (1.6%) were measured inside oxygen minimum zone...
Rationale The jumbo squid Dosidicus gigas is a fishery resource of considerable economic and ecological importance in the Mexican Pacific. Studies on its habitat preferences are needed to understand recent fluctuations abundance availability species. Stable isotope analysis allows us infer aspects such as spatial distribution trophic preferences. Methods We used an ratio mass spectrometer, automated for carbonate analysis, coupled elemental analyzer, determine isotopic composition statoliths...
Wastewater pollution in seagrass has been documented for decades. In areas where baseline data are lacking, such as the Mexican Caribbean, δ15N of can provide information on status and trends. The aims this study were to determine spatial temporal variation values T. testudinum from 2009 2017, explore nature causes isotopic variability, which must be fully understood, examine how variability is linked wastewater coast. Samples collected during 2011–2017 Cancún 2017 Mahahual, analysed a mass...
Rationale Distinct techniques employed to preserve different types of tissues may affect stable isotope analyses conducted on samples, and this is critical when field work takes place in remote areas. To investigate this, the ratios (δ 13 C δ 15 N values) obtained using two methods commonly used humpback whale (and other cetaceans) skin samples were compared. Methods A total 54 pairs whales from southern Baja California Peninsula, Mexico, preserved ethanol (90%) by freezing, between 2007...
The influence of El Niño–Southern Oscillation (ENSO) on productivity at upwelling systems has been extensively studied. However, in recent decades, ENSO diversity documented; there are more frequent events with anomalies the central Pacific (CP) causing ecological impacts that different from canonical centered eastern (EP). We hypothesize effects intensity and its biological response highly dependent diversity. Wavelet coherence was computed for monthly standardized Ekman transport sea...
Contamination of marine ecosystems by pharmaceutically active compounds (PhACs) deserves more research since their environmental fate differs from that observed in freshwater systems. However, knowledge remains scarce, especially semi-arid coastal regions the Global South. This study investigates occurrence and distribution caffeine, carbamazepine, ciprofloxacin, sulfamethoxazole sediments La Paz lagoon, a system region Mexico with inverse estuarine conditions. Samples superficial (0-5 cm...
From June 22 to 24, 1989, temperature, salinity, dissolved oxygen, nitrate, phosphate (0 300 m depth), wind speed and direction were measured in a grid of 35 hydrographic stations the coastal Pacific off Bahía San Hipólito, B.C.S. Zooplankton biomass, abundance diversity copepod community also determined. The average 309º NW 6.7 s–1, respectively. correlation coefficient between sigma-t NO3–1 25.0 26.0 density range was 0.67 (r, 95% confidence level). In general, high concentrations...