Cross-shelf changes in phytoplankton community composition in the Gulf of Mexico (Texas shelf/slope): the use of plant pigments as biomarkers

Lambert, Corey D.; Bianchi, Thomas S.; Santschi, Peter H.

doi:10.1016/s0278-4343(98)00075-2

Cited by 27 publications

(21 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In contrast, the contribution of chlorophyll c1c2, fucoxanthin, and diadinoxanthin was increased in the neritic stations, which reflects an increase in the relative abundance of diatoms, dinoflagellates, and other eukaryotic phytoplankton. This also agrees with previous studies in the GOM which showed an increase in diatom abundance inshore (Lambert et al 1999). Molar C:N and δ 15 N values measured in neritic water masses were similar to those measured from POM collected from the Mississippi River, suggesting that the presence of freshwater fueled the production of eukaryotic phytoplankton.…”

supporting

confidence: 93%

“…3, Table 3). DIN concentrations were at the lower end of the typical range of values measured in the GOM at the neritic and oceanic stations (Lambert et al 1999, Quigg et al 2011). Furthermore, NO 3 − concen trations were below the limit of detection in all samples, and DIN:P ratios indicated that both envi ronments were N limited.…”

Section: Freshwater Influencementioning

confidence: 84%

“…In contrast, the gradient and strength of salinity, silicate, DIN:P, and zeaxanthin vectors indicated that values for these parameters were significantly greater at oceanic stations where POM δ 13 C was enriched and POM δ 15 N was depleted. Phytoplankton pigments have been used as chemical biomarkers to estimate phytoplankton biomass and identify dominant phytoplankton groups in the northern GOM (Lambert et al 1999, Qian et al 2003. Overall, zeaxanthin and chlorophyll c1c2 were the most dominant accessory pigments (Table 3) but only the relative abundance of zeaxanthin significantly correlated with the nMDS solution.…”

Section: Freshwater Influencementioning

confidence: 99%

See 2 more Smart Citations

Isotope baseline shifts in pelagic food webs of the Gulf of Mexico

Dorado¹,

Rooker²,

Wissel³

et al. 2012

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

supporting

confidence: 93%

Section: Freshwater Influencementioning

confidence: 84%

Section: Freshwater Influencementioning

confidence: 99%

See 1 more Smart Citation

Isotope baseline shifts in pelagic food webs of the Gulf of Mexico

Dorado¹,

Rooker²,

Wissel³

et al. 2012

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Section: Extracciónunclassified

“…La muestra se homogeneiza mediante ultrasonidos durante 40 s a una potencia aproximada de 200 W con un 48 sonicador (homogeneizador de ultrasonidos), modelo SONOPULS HD200 (Bandelin), con una micropunta de 6 mm de diámetro. Se deja extraer durante 12 horas a 4ºC en la oscuridad (Lambert et al, 1999).Posteriormente, el extracto se filtra con un filtro de jeringa PTFE de 17 mm y 0.2 µm de poro. El extracto se vierte directamente a viales de vidrio ámbar, donde se conserva hasta su análisis.…”

unclassified

Pigmentos indicadores: caracterización de la comunidad fitoplanctónica en ecosistemas marinos costeros

Frasquet¹,

Teresa²

View full text Add to dashboard Cite

A mi hija Mireia, a Jose y a nuestra familia 5 AgradecimientosEn primer lugar quisiera agradecerle a la Dra. Anna García Ortolá haberme introducido en el mundo de la investigación con la Beca de Colaboración del Ministerio de Educación durante el último curso de la Licenciatura de Ciencias Ambientales y posteriormente tutorando mi trabajo final de carrera.Al Dr. Miguel Rodilla Alamá por creer en mis posibilidades y brindarme la oportunidad de formar parte del Departamento de Ingeniería Hidráulica y Medio Ambiente, al apoyar mi candidatura al Programa Cantera de la Universidad Politécnica de Valencia. Por su confianza en mi y por respetar mis decisiones en todo momento. Los muestreos en el mar no hubieran sido posibles sin su gran dedicación.A la Dra. Silvia Falco y el resto de compañeros que han formado parte de nuestro grupo en el Instituto para la Investigación de Zonas Costeras a lo largo de estos años. Especialmente a Matías y a Mar, nuestros pequeños grumetes, ahora ya no tan pequeños, siempre dispuestos a ayudar.A la Dra. Carmen Cerveró y a Alicio Calabuig, excelentes técnicos y profesionales donde los haya. Por el apoyo técnico siempre que lo he necesitado y sobre todo por su amistad.A todos aquellos compañeros y amigos que han estado ahí compartiendo el día a día, en especial a Vicent, José Andrés, María, Jesús, Javi y Cristina. A Eduardo gracias por echarme un cabo cuando lo he necesitado.A mi marido Jose, a nuestra princesa Mireia y a nuestras familias por estar siempre a nuestro lado. Os quiero.En último lugar quisiera dejar constancia escrita de un deseo: que la defensa de la tesis se convierta en el principio de un largo camino por explorar y no el fin del camino ya explorado. RESUMENLas aguas costeras y estuarinas se caracterizan por una gran variabilidad, espacial y temporal, en sus características hidrológicas, físicas y químicas, que se refleja en la complejidad de la dinámica de sus comunidades fitoplanctónicas. Además, las zonas costeras están sometidas a una elevada presión antrópica, cuyo principal efecto es el aumento de los aportes de nutrientes de origen terrestre a las aguas receptoras, en las que puede llegar a provocar problemas de eutrofización.El objetivo de esta tesis es caracterizar la variabilidad espacial de las comunidades fitoplanctónicas en aguas costeras y de transición caracterizadas por distintas fuentes de entrada de nutrientes. Obtener información sobre el funcionamiento de estos ecosistemas es necesario para orientar las medidas de gestión necesarias para mejorar la calidad de sus aguas.En la presente tesis se realiza la clasificación taxonómica del fitoplancton con el programa CHEMTAX a partir de las concentraciones de pigmentos fotosintéticos halladas por cromatografía líquida de alta resolución en muestras de aguas costeras. Frente a las técnicas tradicionales de microscopía, esta metodología presenta una serie de ventajas entre las que cabe destacar el menor coste, la mayor rapidez y precisión. Además, se realiza una primera aproximación al uso de imágenes de satélit...

show abstract

Pico‐ and nanoplankton communities on a near to offshore transect along the continental shelf of the northwestern Gulf of Mexico in the aftermath of Hurricane Harvey

Kurtay

Prevost

Stauffer

2021

Limnology & Oceanography

View full text Add to dashboard Cite

Hurricane Harvey delivered over 124 trillion liters of freshwater to the Texas-Louisiana coast and the northwestern Gulf of Mexico (GOM) in late August-early September 2017. Environmental conditions, size-fractionated phytoplankton biomass, and pico-and nanoplankton abundances (picocyanobacteria, picoeukaryotes, autotrophic, and heterotrophic nanoplankton) were characterized along nearshore-offshore transects prior to Hurricane Harvey (late July 2017) and in the 3 weeks to 6 months following the storm (September 2017 to March 2018). To understand the extent to which observed changes in the aquatic environment and plankton communities could be attributed to Hurricane Harvey (vs. seasonal or interannual variability), salinity, temperature, and phytoplankton biomass from historical data (2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016)(2017)(2018) were also analyzed. Nearshore stations from September and October 2017 showed significantly lower salinities and overall phytoplankton biomass compared to historical data. Inorganic nitrogen concentrations were minimal in October. Pico-and nanoplankton abundances were lower in September and October than prior to the storm, with the exception of picocyanobacteria. In contrast, post-storm biomass at mid-shelf stations was within the historical average, while pico-and nanoplankton abundances were higher. Offshore stations showed little change in biomass or abundances following the storm. Pre-storm assemblages of pico-and nanoplankton in July 2017 were distinct from those in post-storm months, and variance in these assemblages and specific group abundances was tied to inorganic nutrients, salinity, and temperature. These results point to significant changes in important members of the plankton that occurred in GOM continental shelf waters following a major hurricane, with important implications for oceanic food webs and biogeochemical cycles.Tropical cyclones, such as hurricanes, tropical depressions and storms, and typhoons have significant ecological effects on coastal systems, changing the population density and evenness of organisms ranging from vegetation to fauna with wind velocity, storm duration, and rainfall (Ackerman et al. 1991). Aquatic ecosystems are subject to direct impacts of tropical cyclones from wind, rainfall, and changes in water circulation, which trigger physical effects including water mixing, changes in stratification, and upwelling (Jullien et al. 2012). Most of this study has focused on impacts in estuaries (e.g., Valiela et al. 1998;Peierls et al. 2003;Hu and Muller-Karger 2007;, where tropical cyclones winds and river input can induce vertical mixing and result in the increase of suspended materials in shallow water columns (Hu & Muller-Karger 2007). The increased rainfall also accelerates river input which leads to hyposaline, high nitrogen and phosphorus conditions in the system (Peierls et al. 2003). Research on storm effects further offshore have largely focused on direct impacts of wind, circulation, sea surface temperature (S...

show abstract

Cross-shelf changes in phytoplankton community composition in the Gulf of Mexico (Texas shelf/slope): the use of plant pigments as biomarkers

Cited by 27 publications

References 36 publications

Isotope baseline shifts in pelagic food webs of the Gulf of Mexico

Isotope baseline shifts in pelagic food webs of the Gulf of Mexico

Pigmentos indicadores: caracterización de la comunidad fitoplanctónica en ecosistemas marinos costeros

Pico‐ and nanoplankton communities on a near to offshore transect along the continental shelf of the northwestern Gulf of Mexico in the aftermath of Hurricane Harvey

Contact Info

Product

Resources

About