Decadal basin-scale changes in diatoms, dinoflagellates, and phytoplankton color across the North Atlantic

Leterme, Sophie C.; Edwards, Martin; Laurent, Seuront; Attrill, Martin J.; Reid, Philip C.; John, A.W.G.

doi:10.4319/lo.2005.50.4.1244

Cited by 97 publications

(78 citation statements)

References 32 publications

(49 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The seasonally changing ratio of diatoms to dinoflagellates is thus well represented in the PhytoANN, and is similar to NOBM results (Fig. 8a) and in situ data (Leterme et al, 2005).…”

Section: Seasonal Succession Of Phyto-pftssupporting

confidence: 67%

Distribution of phytoplankton functional types in high-nitrate, low-chlorophyll waters in a new diagnostic ecological indicator model

et al. 2013

View full text Add to dashboard Cite

Abstract.Modeling and monitoring plankton functional types (PFTs) is challenged by the insufficient amount of field measurements of ground truths in both plankton models and biooptical algorithms. In this study, we combine remote sensing data and a dynamic plankton model to simulate an ecologically sound spatial and temporal distribution of phytoPFTs. We apply an innovative ecological indicator approach to modeling PFTs and focus on resolving the question of diatom-coccolithophore coexistence in the subpolar highnitrate and low-chlorophyll regions. We choose an artificial neural network as our modeling framework because it has the potential to interpret complex nonlinear interactions governing complex adaptive systems, of which marine ecosystems are a prime example. Using ecological indicators that fulfill the criteria of measurability, sensitivity and specificity, we demonstrate that our diagnostic model correctly interprets some basic ecological rules similar to ones emerging from dynamic models. Our time series highlight a dynamic phyto-PFT community composition in all high-latitude areas and indicate seasonal coexistence of diatoms and coccolithophores. This observation, though consistent with in situ and remote sensing measurements, has so far not been captured by state-of-the-art dynamic models, which struggle to resolve this "paradox of the plankton". We conclude that an ecological indicator approach is useful for ecological modeling of phytoplankton and potentially higher trophic levels. Finally, we speculate that it could serve as a powerful tool in advancing ecosystem-based management of marine resources.

show abstract

“…The seasonally changing ratio of diatoms to dinoflagellates is thus well represented in the PhytoANN, and is similar to NOBM results (Fig. 8a) and in situ data (Leterme et al, 2005).…”

Section: Seasonal Succession Of Phyto-pftssupporting

confidence: 67%

Distribution of phytoplankton functional types in high-nitrate, low-chlorophyll waters in a new diagnostic ecological indicator model

et al. 2013

View full text Add to dashboard Cite

show abstract

“…This relationship is likely to be a trade-off between increased phytoplankton metabolic rates caused by higher temperatures in cooler regions and a decrease in nutrient supply in warmer regions (Doney, 2006). The floristic shifts associated with this warming move a diatom-based system towards a more flagellate-based one (Leterme et al, 2005). In this scenario, however, it is assumed that the carbon sequestration will be less efficient because, unlike boreal diatombased systems, much of the flagellate and nanoplanktonic production is remineralised near the well-mixed surface.…”

Section: Phyto-and Zooplanktonmentioning

confidence: 99%

Chapter 1 Impacts of the Oceans on Climate Change

Lewis-Brown¹,

Reid²,

Andersson³

et al. 2009

Advances in Marine Biology

134

View full text Add to dashboard Cite

“…More work has been done at the regional scale. In the North Sea and North Atlantic, the Continuous Plankton Recorder (CPR) survey has produced data since 1931 on the distribution of larger phytoplankton (Leterme et al, 2005). CPR data is generally collected from latitudes higher than 40°N and is biased towards shelf waters (Boyce et al, 2010b).…”

Section: Temperature and Stratificationmentioning

confidence: 99%

“…CPR data is generally collected from latitudes higher than 40°N and is biased towards shelf waters (Boyce et al, 2010b). The plankton colour index (PCI), a crude estimate of phytoplankton biomass, has increased since 1958, with a decline in the relative abundance of diatoms compared with dinoflagellates (Leterme et al, 2005). Based on satellite-derived ocean colour data, the area of waters with the lowest chlorophyll concentrations (< 0.07 mg chl m −3 ) associated with the subtropical gyres (waters from 5°N to 45°N, and 5°S to 45°S) has expanded globally by 6.6 million km 2 , or 15%, from 1998 through to 2006 (Polovina et al, 2008).…”

Section: Temperature and Stratificationmentioning

confidence: 99%

Dissolved organic matter (DOM) release by phytoplankton in the contemporary and future ocean

Thornton

2014

European Journal of Phycology

356

311

View full text Add to dashboard Cite

The partitioning of organic matter (OM) between dissolved and particulate phases is an important factor in determining the fate of organic carbon in the ocean. Dissolved organic matter (DOM) release by phytoplankton is a ubiquitous process, resulting in 2-50% of the carbon fixed by photosynthesis leaving the cell. This loss can be divided into two components: passive leakage by diffusion across the cell membrane and the active exudation of DOM into the surrounding environment. At present there is no method to distinguish whether DOM is released via leakage or exudation. Most explanations for exudation remain hypothetical; as while DOM release has been measured extensively, there has been relatively little work to determine why DOM is released. Further research is needed to determine the composition of the DOM released by phytoplankton and to link composition to phytoplankton physiological status and environmental conditions. For example, the causes and physiology of phytoplankton cell death are poorly understood, though cell death increases membrane permeability and presumably DOM release. Recent work has shown that phytoplankton interactions with bacteria are important in determining both the amount and composition of the DOM released. In response to increasing CO 2 in the atmosphere, climate change is creating increasingly stressful conditions for phytoplankton in the surface ocean, including relatively warm water, low pH, low nutrient supply and high light. As ocean physics and chemistry change, it is hypothesized that a greater proportion of primary production will be released directly by phytoplankton into the water as DOM. Changes in the partitioning of primary production between the dissolved and particulate phases will have bottom-up effects on ecosystem structure and function. There is a need for research to determine how these changes affect the fate of organic matter in the ocean, particularly the efficiency of the biological carbon pump.

show abstract

Decadal basin-scale changes in diatoms, dinoflagellates, and phytoplankton color across the North Atlantic

Cited by 97 publications

References 32 publications

Distribution of phytoplankton functional types in high-nitrate, low-chlorophyll waters in a new diagnostic ecological indicator model

Distribution of phytoplankton functional types in high-nitrate, low-chlorophyll waters in a new diagnostic ecological indicator model

Chapter 1 Impacts of the Oceans on Climate Change

Dissolved organic matter (DOM) release by phytoplankton in the contemporary and future ocean

Contact Info

Product

Resources

About