Phytoplankton functional community structure in Argentinian continental shelf determined by HPLC pigment signatures

2012 ◽  
Vol 100 ◽  
pp. 72-81 ◽  
Author(s):  
D. Vega Moreno ◽  
J. Pérez Marrero ◽  
J. Morales ◽  
C. Llerandi García ◽  
M.G. Villagarcía Úbeda ◽  
...  
Keyword(s):  
Community Structure ◽  
Continental Shelf ◽  
Functional Community

TAXON DIVERSITY AND COMMUNITY STRUCTURE OF FOSSIL MOLLUSCAN ASSEMBLAGES FROM THE MID-ATLANTIC CONTINENTAL SHELF (USA)

2018 ◽  
Author(s):  
Carmi Milagros Thompson ◽  
◽  
Rowan Lockwood ◽  
E.N. Worthington ◽  
Kelvin W. Ramsey
Keyword(s):  
Community Structure ◽  
Continental Shelf

scholarly journals Potential impact of increased temperature and CO2 on particulate dimethylsulfoniopropionate in the Southeastern Bering Sea

2011 ◽  
Vol 2 (1) ◽  
pp. 33 ◽  
Author(s):  
Peter A. Lee ◽  
Sarah F. Riseman ◽  
Clinton E. Hare ◽  
David A. Hutchins ◽  
Karine Leblanc ◽  
...  
Keyword(s):  
Community Structure ◽  
Continental Shelf ◽  
Bering Sea ◽  
Feedback Mechanism ◽  
Climate Feedback ◽  
Algal Community ◽  
Central Basin ◽  
Phytoplankton Assemblages ◽  
Potential Impact ◽  
Relative Abundances

The potential impact of elevated sea surface temperature (SST) and pCO2 on algal community structure and particulate dimethylsulfoniopropionate (DMSPp) concentrations in the southeastern Bering Sea was examined using a shipboard “Ecostat” continuous culture system. The ecostat system was used to mimic the conditions projected to exist in the world's oceans by the end of this century (i.e. elevated pCO2 (750 ppm) and elevated SST (ambient + 4°C). Two experiments were conducted using natural phytoplankton assemblages from the high-nutrient low-chlorophyll (HNLC) central basin and from the middle domain of the southeastern continental shelf. At the HNLC site, the relative abundances of haptophytes and pelagophytes were higher and the relative abundance of diatoms lower under “greenhouse” conditions (i.e. combined 750 ppm CO2 and elevated temperature) than control conditions (380 ppm CO2 and ambient temperature). This shift in algal community structure was accompanied by increases in DMSPp (2–3 fold), DMSPp:Chl a (2–3 fold) and DMSP:PON (2 fold). At the continental shelf site, the changes in the relative abundances of haptophytes, pelagophytes and diatoms under “greenhouse” conditions were similar to those observed at the HNLC site, with 2.5 fold increases in DMSPp, 50–100% increases in DMSPp:Chl a and 1.8 fold increases in DMSP:PON. At both locations, changes in community structure and the DMSPp parameters were largely driven by increasing temperature. The observed changes were also consistent with the phytoplankton-DMS-albedo climate feedback mechanism proposed in the Charlson-Lovelock-Andreae-Warren (CLAW) hypothesis.

scholarly journals Dynamics of taxonomic and functional community structure in macrozoobenthos and the underlying driving factors in Lake Dongting during 1988 and 2016

2021 ◽  
Vol 33 (1) ◽  
pp. 218-231
Author(s):  
Wang Chouming ◽  
◽  
Zhang Yi ◽  
Tian Qi ◽  
Huang Daizhong ◽  
...  
Keyword(s):  
Community Structure ◽  
Driving Factors ◽  
Functional Community

scholarly journals Spatial patterns of continental shelf faunal community structure along the Western Antarctic Peninsula

PLoS ONE ◽  
2020 ◽  
Vol 15 (10) ◽  
pp. e0239895 ◽  
Author(s):  
Alan M. Friedlander ◽  
Whitney Goodell ◽  
Pelayo Salinas-de-León ◽  
Enric Ballesteros ◽  
Eric Berkenpas ◽  
...  
Keyword(s):  
Community Structure ◽  
Continental Shelf ◽  
Spatial Patterns ◽  
Antarctic Peninsula ◽  
Western Antarctic Peninsula

scholarly journals Polychaeta (Annelida) from the continental shelf off Aveiro (NW Portugal): Species composition and community structure

Check List ◽  
2013 ◽  
Vol 9 (3) ◽  
pp. 533 ◽  
Author(s):  
Ascensão Ravara ◽  
Maria Helena Moreira
Keyword(s):  
Community Structure ◽  
Species Composition ◽  
Continental Shelf ◽  
New Records ◽  
Depth Range ◽  
Sediment Distribution ◽  
Polychaete Species ◽  
Nw Portugal ◽  
Specific Composition ◽  
Composition And Structure

The present study provides a checklist of the polychaete fauna collected on the continental shelf off Aveiro (NW Portugal), within an area located between latitudes 40°30’N and 40°50’N and longitudes 8°40’W and 9°20’W, and a depth range of 8 to 185 m. The list includes 136 species, belonging to 37 families, from which 19 are new records for the Portuguese coast (Isolda pulchella, Mesochaetopterus sagittarius, Aphelochaeta multibranchis, Chaetozone cf. vivipara, Diplocirrus hirsutus, Goniadella gracilis, Gyptis mediterranea, Lumbrinerides crassicephala, Eumida bahusiensis, Eumida ockelmanni, Nereiphylla paretti, Phyllodoce rosea, Glyphohesione klatti, Malmgreniella arenicolae, Prionospio aluta, Pseudopolydora paucibranchisata, Pseudopolydora pulchra, Scolelepis mesnili, Polycirrus cf. medusa). The shelf off Aveiro presents a well- defined pattern of sediment distribution, with finer sand on the inner (8–22 m depth) and the outer (94–184 m depth) parts of the shelf and coarser sediments on the mid-shelf. The distribution of polychaete assemblages follows closely the aforementioned sedimentary pattern, showing different specific composition and structure in each of the three areas. Depth was also found to play an important role in the distribution of some polychaete species.

Delineating fish-habitat associations for spatially based management: an example from the south-eastern Australian continental shelf

2001 ◽  
Vol 52 (4) ◽  
pp. 513 ◽  
Author(s):  
Alan Williams ◽  
Nicholas J. Bax
Keyword(s):  
Community Structure ◽  
Continental Shelf ◽  
Fish Habitat ◽  
Habitat Associations ◽  
The South ◽  
Community Patterns ◽  
Habitat Features ◽  
South Eastern ◽  
North East ◽  
Representative System

A multi-scale, multi-gear survey identified the spatial structure and compositions of fish communities from a range of seabed types on the south-eastern Australian continental shelf (25 m to ~200 m depth). Most communities are species-rich and contain many shared species. Multivariate analysis of distributions of 201 fishes showed communities to be correlated with depth, latitude and seabed type;correlation with hydrodynamic climate is suggested by patterns in morphology. Depth-related patterns occurred on soft-sediment and hard substrata; strong latitudinal (south-west/north-east)patterns identify the area as a faunal transition zone with a major faunal disjunction extending across the shelf. Community patterns were overlaid on distributions of substrata to produce a biophysical map. This mapping process is discussed in the context of spatial management:the ecologically significant scale at which to map habitat features and definition of management units for ecosystem-based management. A hierarchy of scaled ecological units is being developed for Australia’s National Representative System of Marine Protected Areas (NRSMPA);given the scope of the NRSMPA initiative, surrogate measures of community structure will be required. Maps of substrata and topography, interpreted in the context of the broader depth and latitudinal community structure and as modified by hydrography, may provide one useful surrogate.

Copepods community structure and function under oceanographic influences and anthropic impacts from the narrowest continental shelf of southwestern atlantic

2021 ◽  
pp. 101931
Author(s):  
Laura Rodrigues da Conceição ◽  
Christiane Sampaio Souza ◽  
Paulo de Oliveira Mafalda ◽  
Ralf Schwamborn ◽  
Sigrid Neumann-Leitão
Keyword(s):  
Community Structure ◽  
Continental Shelf ◽  
Structure And Function ◽  
Southwestern Atlantic ◽  
And Function
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