Changes in marine dinoflagellate and diatom abundance under climate change

Hinder, Stephanie L.; Hays, Graeme C.; Edwards, Martin; Roberts, Edward; Walne, Anthony W.; Gravenor, Mike B.

doi:10.1038/nclimate1388

Cited by 274 publications

(195 citation statements)

References 16 publications

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“…We have found that the negative effects of warming may be counteracted by the effects of increased pCO 2 for the benefit of diatom survival. This antagonistic effect may explain why at present the relative abundance of diatoms is increasing while that of other groups is decreasing (Hinder et al, 2012). The favorable effect of a lower pH environment, derived from higher pCO 2 , agrees with the conditions estimated during the Cretaceous Period (Zeebe, 2001) when diatoms first appeared on 30 Earth.…”

Section: And C) 15supporting

confidence: 74%

Acidification counteracts negative effects of warming on diatom silicification

Coello-Camba

Agustı́

2016

Preprint

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Abstract. Diatoms are a significant group contributing up to 40% of annual primary production in the 10 oceans. They have a special siliceous cell wall that, acting as a ballast, plays a key role in the sequestration of global carbon and silica. Diatoms dominate primary production in the Arctic Ocean, where global climate change is causing increases in water temperature and in the partial pressure of CO 2 (pCO 2 ). Here we show that as water temperature increases diatoms become stressed, grow to smaller sizes, and decrease their silicification rates. But at higher pCO 2 , as the pH of seawater decreases, silica 15 incorporation rates are increased. In a future warmer Arctic ocean diatoms may have a competitive advantage under increased ocean acidification, as increased pCO 2 counteracts the adverse effects of increasing temperature on silicification and buffers its consequences in the biogeochemical cycles of carbon and silica. 20

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Section: And C) 15supporting

confidence: 74%

Acidification counteracts negative effects of warming on diatom silicification

Coello-Camba

Agustı́

2016

Preprint

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“…The Rhizosolenia imbricata assemblage blooms in early spring with mixed waters, and maintains itself until summer ( Figure 8C); taking place most of the time along the coastline (e.g., Hinder et al, 2012). The labeled Ra(λ) had a similar spatiotemporal distribution.…”

Section: Spatio-temporal Distribution Of Labeled-ra(λ)mentioning

confidence: 83%

“…For the five indicator taxa (Chaetoceros spp1, spp2, T. nitzschoides, P. seriata, and R. imbricata), the IndVal increased until the fifth clustering level of the CPR samples classification (reaching six assemblages), and then decreased, indicating that these taxa are stenotopic, i.e., they have a small niche 11 breadth (Dufrêne and Legendre, 1997). They also have a strong seasonality and a relatively limited spread, which has been commonly reported in the North Sea and English Channel (e.g., Reid et al, 1990;Rousseau et al, 2002;Hoppenrath, 2004;Bresnan et al, 2009;Hinder et al, 2012). On the contrary, Thalassiosira spp.…”

Section: Concerning the Choice Of Indicator Value Methods To Analyze Cmentioning

confidence: 98%

“…However, these results are supported by a number of studies, which have reported an increase in Thalassiosira spp. abundance and its spatial distribution (e.g., Bresnan et al, 2009;Hinder et al, 2012). In this study, diatom assemblages were used as indicator of phytoplankton community composition.…”

Section: Concerning the Choice Of Indicator Value Methods To Analyze Cmentioning

confidence: 99%

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Estimation of the Potential Detection of Diatom Assemblages Based on Ocean Color Radiance Anomalies in the North Sea

et al. 2017

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Over the past years, a large number of new approaches in the domain of ocean-color have been developed, leading to a variety of innovative descriptors for phytoplankton communities. One of these methods, named PHYSAT, currently allows for the qualitative detection of five main phytoplankton groups from ocean-color measurements. Even though PHYSAT products are widely used in various applications and projects, the approach is limited by the fact it identifies only dominant phytoplankton groups. This current limitation is due to the use of biomarker pigment ratios for establishing empirical relationships between in-situ information and specific ocean-color radiance anomalies in open ocean waters. However, theoretical explanations of PHYSAT suggests that it could be possible to detect more than dominance cases but move more toward phytoplanktonic assemblage detection. Thus, to evaluate the potential of PHYSAT for the detection of phytoplankton assemblages, we took advantage of the Continuous Plankton Recorder (CPR) survey, collected in both the English Channel and the North Sea. The available CPR dataset contains information on diatom abundance in two large areas of the North Sea for the period 1998-2010. Using this unique dataset, recurrent diatom assemblages were retrieved based on classification of CPR samples. Six diatom assemblages were identified in-situ, each having indicators taxa or species. Once this first step was completed, the in-situ analysis was used to empirically associate the diatom assemblages with specific PHYSAT spectral anomalies. This step was facilitated by the use of previous classifications of regional radiance anomalies in terms of shape and amplitude, coupled with phenological tools. Through a matchup exercise, three CPR assemblages were associated with specific radiance anomalies. The maps of detection of these specific radiances anomalies are in close agreement with current in-situ ecological knowledge.

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“…Se han señalado las interacciones como la combinación de vientos, surgencias, frentes de densidad, concentraciones de nutrientes o alteraciones antropogénicas (Alonso & Ochoa 2004, Buschmann 2005, Pitcher et al 1998, Ryan et al 2009, Kudela et al 2005. La intensidad y distribución geográfica de las floraciones algales causadas por dinoflagelados y diatomeas han aumentado en las últimas décadas, asociadas a cambios climáticos locales o globales (Wells et al 2015, Klais et al 2011, Hinder et al 2012, Edwards et al 2006, Reguera 2002, Hallegraeff 1993; así como también el incremento de los reportes de casos de intoxicación humana y graves pérdidas económicas en la industria pesquera (Brooks et al 2016, Sanseverino et al 2016, Berdalet et al 2015, Ferrante et al 2013, Anderson et al 2002, Anderson et al 2000. Además, el estrés antropogénico produce cambios que aumentan la diversidad de comunidades bacterianas marinas y la variabilidad temporal (Davidson et al 2014, Anderson et al 2008, Nogales et al 2011).…”

Section: Introductionunclassified

Asociación de floraciones de algas nocivas y Vibrio spp. en áreas de pesca y acuicultura de bivalvos de moluscos en las bahías de Sechura y Pisco, Perú

et al. 2017

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Entre febrero de 2010 y mayo de 2014 se realizaron 22 evaluaciones en Pisco y 16 en Sechura; ambas áreas importantes en Perú para la extracción de moluscos y maricultura. La incidencia de Vibrio en el agua de mar fue monitoreada durante las floraciones de algas y en épocas normales. Se midieron parámetros ambientales tales como temperatura y nutrientes. En Sechura, Pseudo-nitzschia seriata y Protoperidinium depressum causaron floraciones de algas y fueron dominantes durante todo el período de evaluación. Las temperaturas en esta zona oscilaron entre 21.8 y 25.3 °C. En Pisco, la concentración Akashiwo sanguinea, Messodinium rubrum y Prorocentrum mínimum y el dinoflagelado Cochlodinium polikrykoides fueron los más frecuentes. Las floraciones de algas nocivas ocurrieron cuando las temperaturas estaban entre 17.1 y 23.3 °C, concentraciones de fosfatos que oscilaban entre 1.22 - 6.85 μM y nitratos 0.15 - 7.85 μM. En mayo de 2012, el dinoflagelado Alexandrium peruvianum causó una floración algal, bajo temperaturas de 18.0 a 23.2 °C, valores de fosfato de 0.73 a 11.56 μM y nitratos de 0.76 a 9.81 μM. Los coliformes fueron bajos < 2 – 23 MPN/100 mL, en ambas bahías durante todo el período de estudio. Vibrio alginolyticus fue la especie dominante. Mientras que V. vulnificus y V. parahaemolyticus se detectaron en Pisco, donde las temperaturas del mar comúnmente son mayores y los casos de infecciones graves por ingestión de mariscos se han asociado con el patógeno V. parahaemolyticus.

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Changes in marine dinoflagellate and diatom abundance under climate change

Cited by 274 publications

References 16 publications

Acidification counteracts negative effects of warming on diatom silicification

Acidification counteracts negative effects of warming on diatom silicification

Estimation of the Potential Detection of Diatom Assemblages Based on Ocean Color Radiance Anomalies in the North Sea

Asociación de floraciones de algas nocivas y Vibrio spp. en áreas de pesca y acuicultura de bivalvos de moluscos en las bahías de Sechura y Pisco, Perú

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