Establishment of thermophilic phytoplankton species in the North Sea: biological indicators of climatic changes? Short communication

Nehring, Stefan

doi:10.1006/jmsc.1998.0389

Cited by 66 publications

(40 citation statements)

References 25 publications

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“…An increasing number of species with warm water affinities have been found to take advantage of the altered climate by extending their ranges into the North Sea (e.g. Nehring, 1998;Beare et al, 2004;Perry et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

A supplement to the amphipod (Crustacea) species inventory of Helgoland (German Bight, North Sea): indication of rapid recent change

Beermann

Franke

2011

Mar. Biodivers. Rec.

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The surroundings of the rocky island of Helgoland (German Bight, south-western North Sea) are one of the best-studied sites in European seas with species occurrence data available for nearly 150 years. As the area is strongly affected by global change (e.g. increase in mean sea surface temperature at Helgoland by 1.678C since 1962), ecosystem structure and function are expected to change more than those of average marine systems. The paper presents a supplement to the local amphipod species inventory (5 nautical miles around the island). At least seven species of this ecologically important taxon seem to have newly established themselves at Helgoland since the late 1980s: Ampelisca typica, Amphilochus brunneus, Caprella mutica, Cheirocratus assimilis, Monocorophium acherusicum, Orchestia mediterranea and Orchomenella crenata. Most of them are not only new for the Helgoland area, but also for the German Bight; and two species (Amphilochus brunneus and Orchomenella crenata) are even new to the North Sea as a whole. Out of the seven new species, one (Caprella mutica) is a neozoon from the north-western Pacific. The other six species show clear warm water affinities (oceanic -Lusitanian species) which suggest a recent range expansion in the context of climate warming. The establishment of an increasing number of species formerly probably absent from the area does not seem to be compensated by losses of species, so that local species diversity is expected to increase.

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Section: Discussionmentioning

confidence: 99%

A supplement to the amphipod (Crustacea) species inventory of Helgoland (German Bight, North Sea): indication of rapid recent change

Beermann

Franke

2011

Mar. Biodivers. Rec.

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“…As a consequence, changes in phytoplankton community structures and biogeography as a response to climate change are currently topical issues in marine ecology. Moreover, marine phytoplankton is very well suited to serve as an indicator of climate change (Nehring, 1998), because its dynamics are closely coupled to environmental conditions (AcevedoTrejos et al, 2014). Despite the necessity and advantage of using marine phytoplankton to assess consequences of climate change, the task is also challenging in various ways.…”

Section: Introductionmentioning

confidence: 99%

High-resolution monitoring of marine protists based on an observation strategy integrating automated on-board filtration and molecular analyses

et al. 2016

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Abstract. Information on recent biomass distribution and biogeography of photosynthetic marine protists with adequate temporal and spatial resolution is urgently needed to better understand the consequences of environmental change for marine ecosystems. Here we introduce and review a molecular-based observation strategy for high-resolution assessment of these protists in space and time. It is the result of extensive technology developments, adaptations and evaluations which are documented in a number of different publications, and the results of the recently completed field testing which are introduced in this paper. The observation strategy is organized at four different levels. At level 1, samples are collected at high spatiotemporal resolution using the remotely controlled automated filtration system AUTOFIM. Resulting samples can either be preserved for later laboratory analyses, or directly subjected to molecular surveillance of key species aboard the ship via an automated biosensor system or quantitative polymerase chain reaction (level 2). Preserved samples are analyzed at the next observational levels in the laboratory (levels 3 and 4). At level 3 this involves molecular fingerprinting methods for a quick and reliable overview of differences in protist community composition. Finally, selected samples can be used to generate a detailed analysis of taxonomic protist composition via the latest next generation sequencing technology (NGS) at level 4. An overall integrated dataset of the results based on the different analyses provides comprehensive information on the diversity and biogeography of protists, including all related size classes. At the same time the cost of the observation is optimized with respect to analysis effort and time.

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“…Although non-native species are often introduced either accidentally or on purpose (Reise et al 2002), the immigration or transport of species into a new area is a normal process and often these new species remain inconspicuous components of the receiving community or establish without obvious adverse ecological or economic eVects in the case of the diatom Odontella sinensis. The latter Wrst appeared in the North Sea in 1903 possibly introduced by ship ballast water (Nehring 1998, Gomez 2008.…”

Section: Introductionmentioning

confidence: 99%

The diatom Mediopyxis helysia Kühn, Hargreaves & Halliger 2006 at Helgoland Roads: a success story?

et al. 2011

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The Helgoland Roads phytoplankton long-term data set is one of the longest and the most detailed data sets in Europe, having provided continuous work-daily observations of phytoplankton abundance since 1962. These high frequency counts have undergone and are continuously subject to a high level of quality control. The Helgoland data set thus is useful in the evaluation of new records in phyto-and zooplankton. Here, we report the Wrst appearance of the relatively recently described diatom Mediopyxis helysia in the Helgoland Roads counts. This species was Wrst detected in Helgoland samples in March 2009. Importantly, it has rapidly become a prominent member of the Helgoland phytoplankton community. While in 2009 it only produced a moderate spring peak of 4,000 cells l ¡1, it was one of the dominant diatoms in the 2010 spring bloom with Mediopyxis reaching cell densities above 300,000 cells l ¡1 and total chlorophyll concentrations exceeding 40 g l ¡1 . In 2010, this species was repeatedly present throughout the year. There was no clear relationship between temperature and cell abundance with all Mediopyxis cells occurring at temperatures between 3 and 12°C. However, the extensive peak in 2010 was associated with a sudden drop in salinity, which could indicate that this bloom might have been the result of inXow of low salinity water into the area. This was supported by a laboratory growth experiment in which a clonal culture of M. helysia grew fastest at a salinity of 27 and slowest at a salinity of 31.5. Further long-term observations will be required to establish whether this species will become a regular feature at Helgoland and how this might aVect the local food web.

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Establishment of thermophilic phytoplankton species in the North Sea: biological indicators of climatic changes? Short communication

Cited by 66 publications

References 25 publications

A supplement to the amphipod (Crustacea) species inventory of Helgoland (German Bight, North Sea): indication of rapid recent change

A supplement to the amphipod (Crustacea) species inventory of Helgoland (German Bight, North Sea): indication of rapid recent change

High-resolution monitoring of marine protists based on an observation strategy integrating automated on-board filtration and molecular analyses

The diatom Mediopyxis helysia Kühn, Hargreaves & Halliger 2006 at Helgoland Roads: a success story?

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