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Hoffmeyer, Monica Susana - One of the best experts on this subject based on the ideXlab platform.
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Short-term variability on mesozooplankton community in a shallow mixed estuary (Bahía Blanca, Argentina):Influence of tidal cycles and local winds
Elsevier, 2012Co-Authors: Menendez, Maria Clara, Piccolo, Maria Cintia, Hoffmeyer, Monica SusanaAbstract:The short-term dynamics of zooplankton in coastal ecosystems are strongly influenced by physical processes such as tides, riverine runoff and winds. In this study, we investigated the short-term changes of the representative taxa within mesozooplankton in relation to the semidiurnal tidal cycles. Also, we evaluated the influence of local winds on this short-term variability. Sampling was carried out bimonthly from December 2004 to April 2006 in a fixed point located in the inner zone of the Bahía Blanca Estuary, Argentina. Mesozooplankton samples were taken by pumps during 14-h tidal cycles at 3-h intervals, from surface and bottom. Vertical profiles of temperature and salinity as well as water samples to determine suspended particulate matter were acquired at each sampling date. All data concerning winds were obtained from a meteorological station and water level was recorded with a tide gauge. Holoplankton dominated numerically on Meroplankton and adventitious fraction. Concerning holoplanktonic abundance, the highest values were attained by the calanoid copepods Acartia tonsa and Eurytemora americana. Meroplankton occurred mainly as barnacle larvae while benthic harpacticoids and Corophium sp. dominated the adventitious component. Semidiurnal tide was the main influence on the A. tonsa variability. However, noticeable differences in the abundance pattern as function of wind intensity were detected. Meroplankton abundance did not show a clear variation along the tidal cycle. Distributional pattern of harpacticoids seemed to be mainly modulated by velocity asymmetries in the tidal currents, in the same way as suspended particulate matter. However, the Corophium sp. distribution indicated probable behavioural responses associated with tides. The obtained results show how variable the mesozooplankton community structure can be over short-term time scales in mesotidal temperate estuaries. This variability should be taken into account for any zooplankton monitoring program conducted in temperate systems with a high-tidal regime but also to register changes in zooplankton community at a fine temporal scale.Fil: Menendez, Maria Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; ArgentinaFil: Piccolo, Maria Cintia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; ArgentinaFil: Hoffmeyer, Monica Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentin
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Micro and mesozooplankton composition during winter in Ushuaia and Golondrina Bays (Beagle Channel, Argentina)
Instituto Oceanográfico, 2007Co-Authors: Biancalana Florencia, Barria, Maria Sonia, Hoffmeyer, Monica SusanaAbstract:The current paper analyses the micro and mesozooplankton in Ushuaia and Golondrina Bays, the first research on these plankton fractions of these areas in wintertime (August 2004). The number of microzooplankton and mesozooplankton taxa was higher in Ushuaia Bay than in Golondrina Bay. Aloricate ciliates predominated over tintinnids in microzooplankton and holoplankton over Meroplankton in mesozooplankton in both bays. Ctenocalanus citer, Drepanopus forcipatus and Clausocalanus brevipes presented the highest frequency of occurrence. Among the Meroplankton. Halicarcinus planatus and Munida gregaria were the most frequent decapod larvae in both bays. The distribution of the different sampling station groups of microzooplankton and mesozooplankton as determined by cluster analysis suggests the influence of natural conditions in each bay and anthropogenic environmental differences between the two bays.The current paper analyses the micro and mesozooplankton in Ushuaia and Golondrina Bays, the first research on these plankton fractions of these areas in wintertime (August 2004). The number of microzooplankton and mesozooplankton taxa was higher in Este trabalho analisa 0 micro e o mesozooplancton das Baias Ushuaia e Golondrina, constituindo a primeira pesquisa realizada nessas a'reas sobre estas fracoes do plancton no invemo (agosto 2004). 0 n1'1mero dos taxa do microzooplancton e do mesozooplancton foi mais elevado na Baia Ushuaia do que na Baia Golondrina. Os ciliados aloricados foram dominantes sobre os tintinideos. enquanto que no mesozooplancton o holoplancton foi dominante nas duas baias. Ctenocalamus citer, Drepanopus forcipatus e Clausocalamus brevipes foram as espe'cies mais freqiientes. No meroplancton, Halicamus planatus e Munida gregaria foram as larvas de decapodes mais freqfientes em ambos os locais. Os diferentes grupos de estacoes formados em funcao do microzooplancton e do mesozooplankton, e detectados na analise de agmpamento. sugerem a influéncia de condicoes naturais em cada baia e de diferencas ambientais antropogénicas entre as duas baias.Fil: Biancalana, Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; ArgentinaFil: Barria, Maria Sonia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur; ArgentinaFil: Hoffmeyer, Monica Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Tecnológica Nacional; Argentin
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Micro and mesozooplankton composition during winter in Ushuaia and Golondrina Bays (Beagle Channel, Argentina)
Universidade de São Paulo Instituto Oceanográfico, 2007Co-Authors: Barría De Cao,maría Sonia, Hoffmeyer, Monica SusanaAbstract:The current paper analyses the micro and mesozooplankton in Ushuaia and Golondrina Bays, the first research on these plankton fractions of these areas in wintertime (August 2004). The number of microzooplankton and mesozooplankton taxa was higher in Ushuaia Bay than in Golondrina Bay. Aloricate ciliates predominated over tintinnids in microzooplankton and holoplankton over Meroplankton in mesozooplankton in both bays. Ctenocalanus citer, Drepanopus forcipatus and Clausocalanus brevipes presented the highest frequency of occurrence. Among the Meroplankton, Halicarcinus planatus and Munida gregaria were the most frequent decapod larvae in both bays. The distribution of the different sampling station groups of microzooplankton and mesozooplankton as determined by cluster analysis suggests the influence of natural conditions in each bay and anthropogenic environmental differences between the two bays
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Micro and mesozooplankton composition during winter in Ushuaia and Golondrina Bays (Beagle Channel, Argentina)
Universidade de São Paulo. Instituto Oceanográfico, 2007Co-Authors: Biancalana Florencia, Barría De Cao,maría Sonia, Hoffmeyer, Monica SusanaAbstract:Este trabalho analisa o micro e o mesozooplâncton das Baías Ushuaia e Golondrina, constituindo a primeira pesquisa realizada nessas áreas sobre estas frações do plâncton no inverno (agosto 2004). O número dos taxa do microzooplâncton e do mesozooplâncton foi mais elevado na Baía Ushuaia do que na Baía Golondrina. Os ciliados aloricados foram dominantes sobre os tintinídeos, enquanto que no mesozooplâncton o holoplâncton foi dominante nas duas baías. Ctenocalamus citer, Drepanopus forcipatus e Clausocalamus brevipes foram as espécies mais freqüentes. No meroplâncton, Halicarnus planatus e Munida gregaria foram as larvas de decápodes mais freqüentes em ambos os locais. Os diferentes grupos de estações formados em função do microzooplâncton e do mesozooplânkton, e detectados na análise de agrupamento, sugerem a influência de condições naturais em cada baía e de diferenças ambientais antropogénicas entre as duas baías.The current paper analyses the micro and mesozooplankton in Ushuaia and Golondrina Bays, the first research on these plankton fractions of these areas in wintertime (August 2004). The number of microzooplankton and mesozooplankton taxa was higher in Ushuaia Bay than in Golondrina Bay. Aloricate ciliates predominated over tintinnids in microzooplankton and holoplankton over Meroplankton in mesozooplankton in both bays. Ctenocalanus citer, Drepanopus forcipatus and Clausocalanus brevipes presented the highest frequency of occurrence. Among the Meroplankton, Halicarcinus planatus and Munida gregaria were the most frequent decapod larvae in both bays. The distribution of the different sampling station groups of microzooplankton and mesozooplankton as determined by cluster analysis suggests the influence of natural conditions in each bay and anthropogenic environmental differences between the two bays
Michelsen, Helena Kling - One of the best experts on this subject based on the ideXlab platform.
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Spatial patterns of spring Meroplankton along environmental gradients in a sub-Arctic fjord
'Inter-Research Science Center', 2017Co-Authors: Michelsen, Helena Kling, Reigstad Marit, Nilssen, Einar Magnus, Pedersen Torstein, Svensen CamillaAbstract:The spatial patterns in abundance and composition of benthic invertebrate larvae (Meroplankton), the correlation between these patterns and environmental variables (temperature, salinity and chl a) and the relative abundance of Meroplankton in the mesozooplankton community were investigated in the sub-Arctic Porsangerfjord, Norway (70° N). Zooplankton samples and CTD-profiles were collected at 17 stations along the fjord in April 2013. A total of 32 morphologically different larval types belonging to 8 phyla were identified. Meroplankton were found at all stations, and their community and abundance differed significantly along the fjord. Meroplankton abundance in the inner and outer parts of the fjord was low and was dominated by Gastropoda and Echinodermata. The greatest numbers were recorded in shallow bays and the middle part of the fjord where Cirripedia and Polychaeta were dominant. Meroplankton contributed significantly to the mesozooplankton community in the bays (30 to 90%) and mid-fjord (13 to 48%) areas. These changes in community structure were attributed to spatial gradients in environmental variables such as chl a, salinity and temperature. The different communities suggested a seasonal succession in reproductive events from the fjord mouth toward the head. Considering that spring is an important season for reproduction in pelagic organisms, Meroplankton may play a role in the pelagic ecosystem of high-latitude fjords as grazers and prey. Furthermore, the spatial dynamics and reproductive timing of benthic and holoplanktonic organisms are sensitive to local hydrographical features, illustrating their sensitivity to changing environments
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Seasonal and spatial dynamics of Meroplankton in a sub-Arctic fjord With additional focus on larvae of the invasive red king crab
UiT Norges arktiske universitet, 2017Co-Authors: Michelsen, Helena KlingAbstract:The papers of this thesis are not available in Munin. Paper I: Michelsen, H. K., Svensen, C., Reigstad, M., Nilssen, E. M., Pedersen, T.: "Seasonal dynamics of Meroplankton in a high-latitude fjord". Available in Journal of marine systems 2017, 168:17-30. Paper II: Michelsen, H. K., Nilssen, E. M., Pedersen, T., Reigstad, M., Svensen, C.: "Spatial patterns of spring Meroplankton along environmental gradients in a sub-Arctic fjord". (Manuscript). Paper III: Michelsen, H. K., Nilssen, E. M., Pedersen, T., Svensen, C. "Temporal and spatial dynamics of the invasive Red King Crab zoea and co-existing native decapods in Norwegian waters". (Manuscript).Many benthic marine organisms produce pelagic larvae, Meroplankton, which spend from hours to months in the pelagic. During this time, they form an important part of the pelagic community. Few studies have focused on the year round dynamics of Meroplankton, thus many aspects of Meroplankton dynamics remains unknown at high-latitudes. In the 1960s the red king crab was intentionally introduced into Russian waters and now serves as an important resource for Norway and Russia while at the same time posing a threat to the ecosystem. Currently there is no knowledge on when and where larvae are released in Norwegian waters. The objectives of this thesis were to increase our understanding on the seasonal and spatial dynamics of Meroplankton at high-latitudes, identify environmental variables responsible for spawning and the potential role of Meroplankton in the pelagic. The temporal and spatial dynamics of red king crab larvae was also investigated. Sampling monthly to bi-monthly over a 1.5-years in Porsangerfjord, Norway, showed that Meroplankton abundance and assemblage separate into different seasonal communities. The highest abundance and greatest number of taxa occurs in spring and summer, correlating with increased chlorophyll a and temperature. Numerically, Meroplankton contributed highly to the mesozooplankton community these seasons, suggesting that they are an important component of the pelagic food web. In spring, different Meroplankton assemblages were found along the fjord and correlated with temperature and chlorophyll a. This provides evidence that larval release by benthic invertebrates is coupled with variations in these environmental variables. In a warming ocean this coupling could cause a shift in reproductive phenology and a range expansion of benthic organisms. Larvae of the red king crab were continually released over a period of six months and the greatest densities of larvae was found at protected stations. Having a prolonged larval release is advantageous for this invasive species as it ensures some larvae coincides with favorable conditions. These findings coupled with a wide tolerance to environments as larvae and adults means that they have the potential to continue their expansion in Norway and north into Svalbard waters
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Seasonal and spatial dynamics of Meroplankton in a sub-Arctic fjord With additional focus on larvae of the invasive red king crab
'UiT The Arctic University of Norway', 2017Co-Authors: Michelsen, Helena KlingAbstract:Many benthic marine organisms produce pelagic larvae, Meroplankton, which spend from hours to months in the pelagic. During this time, they form an important part of the pelagic community. Few studies have focused on the year round dynamics of Meroplankton, thus many aspects of Meroplankton dynamics remains unknown at high-latitudes. In the 1960s the red king crab was intentionally introduced into Russian waters and now serves as an important resource for Norway and Russia while at the same time posing a threat to the ecosystem. Currently there is no knowledge on when and where larvae are released in Norwegian waters. The objectives of this thesis were to increase our understanding on the seasonal and spatial dynamics of Meroplankton at high-latitudes, identify environmental variables responsible for spawning and the potential role of Meroplankton in the pelagic. The temporal and spatial dynamics of red king crab larvae was also investigated. Sampling monthly to bi-monthly over a 1.5-years in Porsangerfjord, Norway, showed that Meroplankton abundance and assemblage separate into different seasonal communities. The highest abundance and greatest number of taxa occurs in spring and summer, correlating with increased chlorophyll a and temperature. Numerically, Meroplankton contributed highly to the mesozooplankton community these seasons, suggesting that they are an important component of the pelagic food web. In spring, different Meroplankton assemblages were found along the fjord and correlated with temperature and chlorophyll a. This provides evidence that larval release by benthic invertebrates is coupled with variations in these environmental variables. In a warming ocean this coupling could cause a shift in reproductive phenology and a range expansion of benthic organisms. Larvae of the red king crab were continually released over a period of six months and the greatest densities of larvae was found at protected stations. Having a prolonged larval release is advantageous for this invasive species as it ensures some larvae coincides with favorable conditions. These findings coupled with a wide tolerance to environments as larvae and adults means that they have the potential to continue their expansion in Norway and north into Svalbard waters
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Spatial patterns of spring Meroplankton along environmental gradients in a sub-Arctic fjord
'Inter-Research Science Center', 2017Co-Authors: Michelsen, Helena Kling, Reigstad Marit, Nilssen, Einar Magnus, Pedersen Torstein, Svensen CamillaAbstract:Source at https://doi.org/10.3354/ab00686 .The spatial patterns in abundance and composition of benthic invertebrate larvae (Meroplankton), the correlation between these patterns and environmental variables (temperature, salinity and chl a) and the relative abundance of Meroplankton in the mesozooplankton community were investigated in the sub-Arctic Porsangerfjord, Norway (70° N). Zooplankton samples and CTD-profiles were collected at 17 stations along the fjord in April 2013. A total of 32 morphologically different larval types belonging to 8 phyla were identified. Meroplankton were found at all stations, and their community and abundance differed significantly along the fjord. Meroplankton abundance in the inner and outer parts of the fjord was low and was dominated by Gastropoda and Echinodermata. The greatest numbers were recorded in shallow bays and the middle part of the fjord where Cirripedia and Polychaeta were dominant. Meroplankton contributed significantly to the mesozooplankton community in the bays (30 to 90%) and mid-fjord (13 to 48%) areas. These changes in community structure were attributed to spatial gradients in environmental variables such as chl a, salinity and temperature. The different communities suggested a seasonal succession in reproductive events from the fjord mouth toward the head. Considering that spring is an important season for reproduction in pelagic organisms, Meroplankton may play a role in the pelagic ecosystem of high-latitude fjords as grazers and prey. Furthermore, the spatial dynamics and reproductive timing of benthic and holoplanktonic organisms are sensitive to local hydrographical features, illustrating their sensitivity to changing environments
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Seasonal dynamics of Meroplankton in a high-latitude fjord
'Elsevier BV', 2016Co-Authors: Michelsen, Helena Kling, Svensen Camilla, Reigstad Marit, Nilssen, Einar Magnus, Pedersen TorsteinAbstract:Knowledge on the seasonal timing and composition of pelagic larvae of many benthic invertebrates, referred to as Meroplankton, is limited for high-latitude fjords and coastal areas. We investigated the seasonal dynamics of Meroplankton in the sub-Arctic Porsangerfjord (70°N), Norway, by examining their seasonal changes in relation to temperature, chlorophyll a and salinity. Samples were collected at two stations between February 2013 and August 2014. We identified 41 Meroplanktonic taxa belonging to eight phyla. Multivariate analysis indicated different Meroplankton compositions in winter, spring, early summer and late summer. More larvae appeared during spring and summer, forming two peaks in Meroplankton abundance. The spring peak was dominated by cirripede nauplii, and late summer peak was dominated by bivalve veligers. Moreover, spring Meroplankton were the dominant component in the zooplankton community this season. In winter, low abundances and few Meroplanktonic taxa were observed. Timing for a majority of Meroplankton correlated with primary production and temperature. The presence of Meroplankton in the water column through the whole year and at times dominant in the zooplankton community, suggests that they, in addition to being important for benthic recruitment, may play a role in the pelagic ecosystem as grazers on phytoplankton and as prey for other organisms
Elaine S. Fileman - One of the best experts on this subject based on the ideXlab platform.
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Feeding selectivity of bivalve larvae on natural plankton assemblages in the Western English Channel
Marine Biology, 2015Co-Authors: Penelope K. Lindeque, Helen E. Parry, Rachel A. Harmer, Anna Dimond, Katharine L. Pemberton, Elaine S. FilemanAbstract:Meroplankton, including bivalve larvae, are an important and yet understudied component of coastal marine food webs. Understanding the baseline of Meroplankton ecology is imperative to establish and predict their sensitivity to local and global marine stressors. Over an annual cycle (October 2009–September 2010), bivalve larvae were collected from the Western Channel Observatory time series station L4 (50°15.00′N, 4°13.02′W). The morphologically similar larvae were identified by analysis of the 18S nuclear small subunit ribosomal RNA gene, and a series of incubation experiments were conducted to determine larval ingestion rates on natural plankton assemblages. Complementary gut content analysis was performed using a PCR-based method for detecting prey DNA both from field-collected larvae and those from the feeding experiments. Molecular identification of bivalve larvae showed the community composition to change over the course of the sampling period with domination by Phaxas in winter and higher diversity in autumn. The larvae selected for nanoeukaryotes (2–20 µm) including coccolithophores (75 % of the bivalve larvae diet. Additionally, a small percentage of carbon ingested originated from heterotrophic ciliates (
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Feeding rates and prey selectivity of planktonic decapod larvae in the Western English Channel
Marine Biology, 2014Co-Authors: Elaine S. Fileman, Penelope K. Lindeque, Rachel A. Harmer, Claudia Halsband, Angus AtkinsonAbstract:Meroplankton are seasonally important contributors to the zooplankton, particularly at inshore sites, yet their feeding ecology is poorly known relative to holoplankton. While several studies have measured feeding in decapod larvae, few studies have examined the feeding rates of decapod larvae on natural prey assemblages throughout the reproductive season. We conducted 8 feeding experiments with Necora puber , Liocarcinus spp. and Upogebia spp. zoea larvae collected from the L4 monitoring site off Plymouth (50°15.00′N, 4°13.02′W) during spring–summer 2009 and 2010. This period spanned moderate-to-high food availability (0.5–1.6 µg chl- a L^−1), but a great range in food composition with small cells
Andrea S. Freire - One of the best experts on this subject based on the ideXlab platform.
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Meroplankton community structure across oceanographic fronts along the South Brazil Shelf
Journal of Marine Systems, 2020Co-Authors: Manoela Costa Brandão, Carlos A.e. Garcia, Andrea S. FreireAbstract:Abstract The influence of oceanographic fronts on the abundance and community composition of invertebrate larvae, mostly of benthic species, along nearly 2000 km of the southwestern Atlantic shelf (21–34°S) was investigated. Meroplankton was sampled through vertical hauls at 89 stations, distributed along 14 cross-shelf transects, during late spring 2010 and early summer 2011. Salinity and temperature were registered with a CTD/rosette system, which provided seawater for chlorophyll-a and nutrient concentrations estimations. Vertical profiles of temperature, salinity, chlorophyll-a and nutrients were used as proxies of the fronts. In addition, high-resolution thermosalinograph data were used to detect surface frontal features. Meroplankton abundance peaks were found at several fronts intersected by the ship, including upwelling zones, estuarine and plume fronts, a shelf-break front, and two cyclonic eddies. Furthermore, Meroplankton abundance was also relatively higher at small-scale thermal and/or saline surface fronts observed along the shelf. Such increases in Meroplankton abundance are likely to be ascribed to high nutrient input and primary production. Distinct taxa of invertebrate larvae occurred at different types of fronts, besides the coastal realm, which was virtually dominated by decapod, cirripede and bivalve larvae. Small-scale shelf fronts presented high abundances of decapod and gastropod larvae, for instance, while larvae of polychaetes were the most frequent in the estuarine front of Patos Lagoon section.
Angus Atkinson - One of the best experts on this subject based on the ideXlab platform.
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Lifeform indicators reveal large-scale shifts in plankton across the North-West European shelf.
Global Change Biology, 2020Co-Authors: Jacob Bedford, Angus Atkinson, Clare Ostle, David G. Johns, Mike Best, Eileen Bresnan, Margarita Machairopoulou, Carolyn Graves, Michelle Devlin, Alex MilliganAbstract:Increasing direct human pressures on the marine environment, coupled with climate-driven changes, is a concern to marine ecosystems globally. This requires the development and monitoring of ecosystem indicators for effective management and adaptation planning. Plankton lifeforms (broad functional groups) are sensitive indicators of marine environmental change and can provide a simplified view of plankton biodiversity, building an understanding of change in lower trophic levels. Here, we visualize regional-scale multi-decadal trends in six key plankton lifeforms as well as their correlative relationships with sea surface temperature (SST). For the first time, we collate trends across multiple disparate surveys, comparing the spatially and temporally extensive Continuous Plankton Recorder (CPR) survey (offshore) with multiple long-term fixed station-based time-series (inshore) from around the UK coastline. These analyses of plankton lifeforms showed profound long-term changes, which were coherent across large spatial scales. For example, 'diatom' and 'Meroplankton' lifeforms showed strong alignment between surveys and coherent regional-scale trends, with the 1998-2017 decadal average abundance of Meroplankton being 2.3 times that of 1958-1967 for CPR samples in the North Sea. This major, shelf-wide increase in Meroplankton correlated with increasing SSTs, and contrasted with a general decrease in holoplankton (dominated by small copepods), indicating a changing balance of benthic and pelagic fauna. Likewise, inshore-offshore gradients in dinoflagellate trends, with contemporary increases inshore contrasting with multi-decadal decreases offshore (approx. 75% lower decadal mean abundance), urgently require the identification of causal mechanisms. Our lifeform approach allows the collation of many different data types and time-series across the NW European shelf, providing a crucial evidence base for informing ecosystem-based management, and the development of regional adaptation plans.
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Feeding rates and prey selectivity of planktonic decapod larvae in the Western English Channel
Marine Biology, 2014Co-Authors: Elaine S. Fileman, Penelope K. Lindeque, Rachel A. Harmer, Claudia Halsband, Angus AtkinsonAbstract:Meroplankton are seasonally important contributors to the zooplankton, particularly at inshore sites, yet their feeding ecology is poorly known relative to holoplankton. While several studies have measured feeding in decapod larvae, few studies have examined the feeding rates of decapod larvae on natural prey assemblages throughout the reproductive season. We conducted 8 feeding experiments with Necora puber , Liocarcinus spp. and Upogebia spp. zoea larvae collected from the L4 monitoring site off Plymouth (50°15.00′N, 4°13.02′W) during spring–summer 2009 and 2010. This period spanned moderate-to-high food availability (0.5–1.6 µg chl- a L^−1), but a great range in food composition with small cells
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Composition of taxa in the zooplankton samples derived from morphological and metagenetic analysis.
2013Co-Authors: Penelope K. Lindeque, Helen E. Parry, Rachel A. Harmer, Paul J. Somerfield, Angus AtkinsonAbstract:The plankton data has been separated into (A) Copepoda, (B) Holoplankton (minus the Copepoda) and (C) Meroplankton. Values above each bar show the percentage contribution of each group to the total number of sequences (metagenetic analysis) or organisms m-3 (morphological analysis) for each time point. The bar charts show the composition of taxa present within each group as a percentage of the total number of sequences/organisms in that group.