More information:

Holzwarth, U., Esper, O. and Zonneveld, K. 2007. Distribution of organic-walled dinoflagellate cysts in shelf surface sediments of the Benguela upwelling system in relationship to environmental conditions. Marine Micropaleontology, 64(1–2): 91–119


Description:

Distribution of organic-walled dinoflagellate cysts in shelf surface sediments of the Benguela upwelling system in relationship to environmental conditions.

Summary / Notes:

To obtain insight in the relationship between the spatial distribution of organic-walled dinoflagellate cysts (dinocysts) and local environmental conditions, fifty-eight surface sediment samples from the coastal shelf off SW Africa were investigated on their dinocyst content with special focus on the two main river systems and the active upwelling that characterise this region. To avoid possible overprint by species-selective preservation, samples have been selected mainly from shelf sites where high sedimentation rates and/or low bottom water oxygen concentrations prevail. Multivariate ordination analyses have been carried out to investigate the relationship between the distribution patterns of individual species to environmental parameters of the upper water column and sediment transport processes. The main oceanographical variables at the surface (temperature, salinity, nutrients chlorophyll-a) in the region show onshore–offshore gradients. This pattern is reflected in the dinocyst associations with high relative abundances of heterotrophic dinocyst species in neritic regions characterised by high chlorophyll-aand low salinity conditions in surface waters. Phototrophic dinocyst species, notably Operculodinium centrocarpum, dominate in the more oceanic area. Differences in the distribution of phototrophic dinocyst species can be related to sea surface salinity and sea surface temperature gradients and to a lesser extent to chlorophyll-a concentrations. Apart from longitudinal gradients the dinocyst distribution clearly reflects regional environmental features. Six groups of species can be distinguished, characteristic for (1) coastal regions (cysts of Polykrikos kofoidii and Selenopemphix quanta), (2) the vicinity of active upwelling (Brigantedinium spp., Echinidinium aculeatum, Echinidinium spp. and Echinidinium transparantum), (3) river mouths (Lejeunecysta oliva, cysts of Protoperidinium americanum, Selenopemphix nephroides and Votadinium calvum), (4) slope and open ocean sediments (Dalella chathamense, Impagidinium patulum and Operculodinium centrocarpum, (5) the southern Benguela region (south of 24°S) (Spiniferites ramosus) and (6) the northern Benguela region (north of 24°S) (Nematosphaeropsis labyrinthus and Pyxidinopsis reticulata). No indication of overprint of the palaeo-ecological signal by lateral transport of allochthonous species could be observed. Keywords: Organic-walled dinoflagellate cysts, Upwelling, Benguela System, Productivity, Chlorophyll-a, River mouths.

Year: 2007

Type: Journal Article

URL: http://www.sciencedirect.com/science/article/pii/S0377839807000369


Top 50 related results:

You may also be interested in the following items which are on a similar or related topic, listed in order of similarity.

Results per page:

Results: 1 to 50 of 50

To FILTER: Use the pale green row to filter the results on this page. Type in text or select from the year list.

Rows matching filter(s): All
What is this row? 
Data titleYearOriginFile typeDownloadkml/kmz
Lass, H.U. and Mohrholz, V. 2005. On the fluctuations and vertical structure of the shelf circulation off Walvis Bay, Namibia. Continental Shelf Research, 25: 1473 - 1497
  » More info & related results
2005 Journal Article1.48 mb pdf
Preview
Duncombe Rae, C.M. 2005. A demonstration of the hydrographic partition of the Benguela upwelling ecosystem at 26°40`S. African Journal of Marine Science, 27(3): 617-628
  » More info & related results
2005 Journal Article2.77 mb pdf
Preview
Chrity, S. 2006. The Namib: Detritus and Fog Dependence
  » More info & related results
2006 Report1.01 mb pdf
Preview
Rosell-Melé. A., Martínez-Garcia, A. and McClymont, E.L. 2014. Persistent warmth across the Benguela upwelling system during the Pliocene epoch. Earth and Planetary Science Letters, 386: 10–20
  » More info & related results
2014 Journal Article
Schukat, A., Auel, H., Teuber, L., Lahajnar, N. and Hagen, W. 2014. Complex trophic interactions of calanoid copepods in the Benguela upwelling system. Journal of Sea Research, 85: 186–196
  » More info & related results
2014 Journal Article
Weeks, S.J., Currie, B., Bakun, A. and Peard, K.R. 2004. Hydrogen sulphide eruptions in the Atlantic Ocean off southern Africa: implications of a new view based on SeaWiFS satellite imagery. Deep Sea Research Part I: Oceanographic Research Papers, 51(2): 153–172
  » More info & related results
2004 Journal Article
Giraudeau, J., Monteiro, P.M.S. and Nikodemus, K. 1993. Distribution and malformation of living coccolithophores in the northern Benguela upwelling system off Namibia. Marine Micropaleontology, 22(1–2): 93–110
  » More info & related results
1993 Journal Article
Jacot Des Combes, H. and Abelmann, A. 2007. A 350-ky radiolarian record off Lüderitz, Namibia—evidence for changes in the upwelling regime. Marine Micropaleontology, 62(3): 194–210
  » More info & related results
2007 Journal Article
Hansen, A., Ohde, T. and Wasmund, N. 2014. Succession of micro- and nanoplankton groups in aging upwelled waters off Namibia. Journal of Marine Systems, In Press, Accepted Manuscript
  » More info & related results
2014 Journal Article
Küster-Heinsa, K., Steinmetz, E., De Lange, G.J. and Zabel, M. 2010. Phosphorus cycling in marine sediments from the continental margin off Namibia. Marine Geology, 274(1–4): 95–106
  » More info & related results
2010 Journal Article
Niewöhner, C., Hensen, C., Kasten, S., Zabel, M. and Schulz, H.D. 1998. Deep Sulfate Reduction Completely Mediated by Anaerobic Methane Oxidation in Sediments of the Upwelling Area off Namibia. Geochimica et Cosmochimica Acta, 62(3): 455–464
  » More info & related results
1998 Journal Article
Inthorn, M., Rutgers van der Loeff, M. and Zabel, M. 2006. A study of particle exchange at the sediment–water interface in the Benguela upwelling area based on 234Th/238U disequilibrium. Deep Sea Research Part I: Oceanographic Research Papers, 53(11): 1742–1761
  » More info & related results
2006 Journal Article
Fossing, H., Ferdelman, T.G. and Berg, P. 2000. Sulfate reduction and methane oxidation in continental margin sediments influenced by irrigation (South-East Atlantic off Namibia). Geochimica et Cosmochimica Acta, 64(5): 897–910
  » More info & related results
2000 Journal Article
Ohde, T., Siegel, H., Reißmann, J. and Gerth, M. 2007. Identification and investigation of sulphur plumes along the Namibian coast using the MERIS sensor. Continental Shelf Research, 27(6): 744–756
  » More info & related results
2007 Journal Article
Edelman-Furstenberg, Y. 2014. Distribution and paleoecology of molluscan skeletal remains along an upwelling tract: Benguela system, Namibian shelf. Marine Geology, 353: 153–162
  » More info & related results
2014 Journal Article
Wasmund, N., Nausch, G. and Hansen, A. 2014. Phytoplankton succession in an isolated upwelled Benguela water body in relation to different initial nutrient conditions. Journal of Marine Systems, In Press, Corrected Proof
  » More info & related results
2014 Journal Article
Krammer, R., Baumann, K-H. and Henrich, R. 2006. Middle to late Miocene fluctuations in the incipient Benguela Upwelling System revealed by calcareous nannofossil assemblages (ODP Site 1085A). Palaeogeography, Palaeoclimatology, Palaeoecology, 230(3–4): 319–334
  » More info & related results
2006 Journal Article
Baumann, K-H. and Freitag, T. 2004. Pleistocene fluctuations in the northern Benguela Current system as revealed by coccolith assemblages. Marine Micropaleontology, 52(1–4): 195–215
  » More info & related results
2004 Journal Article
Muller, A.A., Mohrholz, V. and Schmidt, M. 2013. The circulation dynamics associated with a northern Benguela upwelling filament during October 2010. Continental Shelf Research, 63: 59–68
  » More info & related results
2013 Journal Article
Postel, L., Mohrholz, V. and Packard, T.T. 2014. Upwelling and Successive Ecosystem Response in the Northern Benguela Region. Journal of Marine Systems, In Press
  » More info & related results
2014 Journal Article
Santana-Casiano, J.M., González-Dávila, M. and Ucha, I.R. 2009. Carbon dioxide fluxes in the Benguela upwelling system during winter and spring: A comparison between 2005 and 2006. Deep Sea Research Part II: Topical Studies in Oceanography, 56(8–10): 533–541
  » More info & related results
2009 Journal Article
Arhan, M., Mercier, H. and Park, Y-H. 2003. On the deep water circulation of the eastern South Atlantic Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 50(7): 889–916
  » More info & related results
2003 Journal Article
Dupont, L.M. 2006. Late Pliocene vegetation and climate in Namibia (southern Africa) derived from palynology of ODP Site 1082. Geochemistry, Geophysics, Geosystems, 7(5)
  » More info & related results
2006 Journal Article
Schuette, G. and Schrader, H. 1981. Diatoms in Surface Sediments: A Reflection of Coastal Upwelling, in Coastal Upwelling (ed F. A. Richards), American Geophysical Union, Washington, D. C.
  » More info & related results
1981 Book, Book Section, Booklet
Zettler, M.L., Bochert, R. and Pollehne, F. 2013. Macrozoobenthic biodiversity patterns in the northern province of the Benguela upwelling system. African Journal of Marine Science, 35(2): 283-290
  » More info & related results
2013 Journal Article
Bailey, G.W., Beyers, C.J. de B. and Lipschitz, S.R. 1985. Seasonal variation of oxygen deficiency in waters off southern South West Africa in 1975 and 1976 and its relation to the catchability and distribution of the Cape rock lobster Jasus lalandii. South African Journal of Marine Science, 3(1): 197-214
  » More info & related results
1985 Journal Article
Gingele, F.X. and Schmedl,G. 1999. Comparison of independent proxies in the reconstruction of deep-water circulation in the South-East Atlantic off Namibia. South African Journal of Marine Science, 21(1): 181-190
  » More info & related results
1999 Journal Article
Ohde, T. and Mohrholz, V. 2011. Interannual variability of sulphur plumes off the Namibian coast. International Journal of Remote Sensing, 32(24): 9327-9342
  » More info & related results
2011 Journal Article
Penrith, M.J. 1976. First confirmed record of Lithognathus lithognathus sympatric with L. aureti (Pisces: Sparidae). Madoqua, 9(3): 53-54
  » More info & related results
1976 Journal Article139 kb pdf
Preview
Kramer, L.B., van der Bank, F.H. and Wink, M. 2016. Marcusenius desertus sp. nov. (Teleostei: Mormyridae), a mormyrid fish from the Namib desert. African Journal of Aquatic Science, DOI: 10.2989/16085914.2015.1137855
  » More info & related results
2016 Journal Article3.5 mb pdf
Preview
Kirchner, C.H., Bartholomae, C.H. and Kreiner, A. 2009. Use of environmental parameters to explain the variability in spawnerrecruitment relationships of Namibian sardine Sardinops sagax. African Journal of Marine Science: 31(2): 157-170
  » More info & related results
2009 Journal Article347 kb pdf
Preview
Lett, C., Veitch, J., Van der Lingen, C.D. and Hutchings, L. 2007. Assessment of an environmental barrier to transport of ichthyoplankton from the southern to the northern Benguela ecosystems. Marine Ecology Progress Series, 347: 247-259
  » More info & related results
2007 Journal Article2.47 mb pdf
Preview
Kreiner, A., Yemane, D., Stenevik, E.K. and Moroff, N.E. 2011. The selection of spawning location of sardine (Sardinops sagax) in the northern Benguela after changes in stock structure and environmental conditions. Fisheries Oceanography, 20(6): 560-569
  » More info & related results
2011 Journal Article357 kb pdf
Preview
Bartholomae, C. and Hagen, E. 2007. Short-term variability in alongshore winds and temperature off Swakopmund, Namibia, during a non-upwelling event in 1998-1999. African Journal of Marine Science, 29(1): 141–145
  » More info & related results
2007 Journal Article386 kb pdf
Preview
Van der Lingen, C.D., Kreiner, A. and Fréon, P. 2001. A comparison of condition factor and gonadosomatic index of sardine Sardinops sagax stocks in the northern and southern Benguela upwelling ecosystems, 1984–1999. South African Journal of Marine Science, 23(1): 123-134
  » More info & related results
2001 Journal Article131 kb pdf
Preview
Berger, W.H., Lange, C.B. and Wefer, G. 2001. Namibia Upwelling: Ocean Meadows off the Desert
  » More info & related results
2001 Report149 kb pdf
Preview
Krakstad, J.O. 2001. The Namibian horse mackerel stock -Summary of resource and management
  » More info & related results
2001 Report471 kb pdf
Preview
Gibbons, M.J. 1997. An introduction to the Zooplankton of the Benguella current Region
  » More info & related results
1997 Report1.28 mb pdf
Preview
Rouault, M. 2003. PIRATA South East Extension Feasibility Study. RAF/00/G32 – Benguela Current Large Marine Ecosystem - December 2003
  » More info & related results
2003 Report1.58 mb pdf
Preview
Steffani, N., Sedick, S., Rogers, J. and Gibbons, M.J. 2015. Infaunal benthic communities from the inner shelf off southwestern Africa are characterised by generalist species. PLoS ONE, 10(11): e0143637
  » More info & related results
2015 Report1.81 mb pdf
Preview
Lück, A. H. 1998. Möglichkeiten und Probleme der namibischen Wasserversorgung für Küstenstandorte zwischen Namibwüste und Benguelastrom. Namibia Magazin. Göttingen, Germany, 18-21 and 26-29
  » More info & related results
1998DRFN DLIBReport8.04 mb pdf
Preview
Zhu, B.Q. 2016. A Review on Late Quaternary Environmental Change in the Namibia, South-Western Africa. Journal of Earth Science and Climatic Change, 7(4): 1-9
  » More info & related results
2016 Journal Article723 kb pdf
Preview
Heine, K. 1998. Late Quaternary climate changes in the Central Namib Desert, Namibia. In: Quaternary Deserts and Climatic Change, 293-304
  » More info & related results
1998DRFN DLIBBook, Book Section, Booklet7.93 mb pdf
Preview
Solbakken, R. 2014. Environmental Impact Assessment of a Phosphate Mining off the Namibian Coast – A Pilot Project. Norwegian forum for development cooperation in fisheries, aquaculture and aquatic environment, Oslo, August 26th 2014
  » More info & related results
2014 Presentation1.89 mb pdf
Preview
Kolberg, H. 1982. Kurzmitteilung. Lanioturdus, 18(7): 8
  » More info & related results
1982 Journal Article220 kb pdf
Preview
Roux, J-P., van der Lingen, C.D., Gibbons, M.J., Moroff, N.E., Shannon, L.J., Smith, A.D.M. and Cury, P.M. 2013. Jellyfication of Marine Ecosystems as a Likely Consequence of Overfishing Small Pelagic Fishes: Lessons from the Benguela. Bulletin of Marine Science, 89(1): 249-284
  » More info & related results
2013 Journal Article
Dingle, R.V., Bremner, J.M., Giraudeau, J. and Buhmann, D. 1996. Modern and palaeooceanographic environments under Benguela upwelling cells of southern Namibia. Palaeogeography, Palaeoclimatology, Palaeoecology, 123(1-4): 85-105
  » More info & related results
1996 Journal Article
Siesser, W.G. 1980. Late miocene origin of the Benguela upswelling system off northern Namibia. Science, 208: 283-285
  » More info & related results
1980 Journal Article
Walvis Bay Biodiversity Report 2008
  » More info & related results
2008 Report3.53 mb pdf
Preview
Risser, A. 1998. Nutrients and upwelling. In: Focus on Fisheries and Research, Namibia Brief, No. 20, January 1998, Namibia Foundation, page 109
  » More info & related results
1998 Book, Book Section, Booklet1.16 mb pdf
Preview

» Links to useful free software for working with shapefiles, kml and kmz files, pdf files and more.