Diversity of peracarid crustaceans (Malacostraca) from the abyssal plain of the Angola Basin

Brandt, Angelika; Brenke, Nils; Andres, Hans-Georg; Brix, Saskia; Guerrero-Kommritz, Jürgen; Mühlenhardt-Siegel, Ute; Wägele, Johann‐Wolfgang

doi:10.1016/j.ode.2004.10.007

Cited by 85 publications

(50 citation statements)

References 47 publications

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“…At least for some microbial eukaryotes the deep-sea floor seems to constitute a vast, interconnected environment. For these ribotypes, the Gibraltar sill or the Walvis ridge do not constitute barriers of dispersal, in contrast to some deep-sea metazoans (4,32). Nevertheless, assessing the extent of globally-dispersed deep-sea species is difficult for microbial eukaryotes (5, 9).…”

Section: W I T H D R a W Nmentioning

confidence: 99%

WITHDRAWN: Wide distribution ranges of several microbial eukaryotes of nanofaunal size at abyssal depths of the South-East Atlantic and the Mediterranean

Scheckenbach

Hausmann²,

Wylezich³

et al. 2011

Applied and Environmental Microbiology

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Section: W I T H D R a W Nmentioning

confidence: 99%

WITHDRAWN: Wide distribution ranges of several microbial eukaryotes of nanofaunal size at abyssal depths of the South-East Atlantic and the Mediterranean

Scheckenbach

Hausmann²,

Wylezich³

et al. 2011

Applied and Environmental Microbiology

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“…Half of the known species of deep-sea bivalves are restricted to either the eastern or western Atlantic McClain et al (2009b), suggesting a role of the Mid-Atlantic Ridge. Similarly, the Walvis Ridge may isolate peracarid crustaceans in the Angola Basin (Brandt et al 2005). Landmasses also provide obvious physical barriers, but approximately 15 -20% of species are shared between the Pacific and Atlantic (Vinogradova 1997).…”

Section: H E N R I C I a L I S A B A T H Y A L S E A S T A R T H O mentioning

confidence: 99%

The dynamics of biogeographic ranges in the deep sea

2010

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Anthropogenic disturbances such as fishing, mining, oil drilling, bioprospecting, warming, and acidification in the deep sea are increasing, yet generalities about deep-sea biogeography remain elusive. Owing to the lack of perceived environmental variability and geographical barriers, ranges of deep-sea species were traditionally assumed to be exceedingly large. In contrast, seamount and chemosynthetic habitats with reported high endemicity challenge the broad applicability of a single biogeographic paradigm for the deep sea. New research benefiting from higher resolution sampling, molecular methods and public databases can now more rigorously examine dispersal distances and species ranges on the vast ocean floor. Here, we explore the major outstanding questions in deep-sea biogeography. Based on current evidence, many taxa appear broadly distributed across the deep sea, a pattern replicated in both the abyssal plains and specialized environments such as hydrothermal vents. Cold waters may slow larval metabolism and development augmenting the great intrinsic ability for dispersal among many deep-sea species. Currents, environmental shifts, and topography can prove to be dispersal barriers but are often semipermeable. Evidence of historical events such as points of faunal origin and climatic fluctuations are also evident in contemporary biogeographic ranges. Continued synthetic analysis, database construction, theoretical advancement and field sampling will be required to further refine hypotheses regarding deep-sea biogeography.

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“…Furthermore, the Cape Basin is dominated by Lower Circumpolar Deep Water arriving from Antarctica and the deepest part of the Angola and Guinea Basins are filled with North Atlantic Deep Water originating from the Arctic (Bickert and Wefer, 1996). Noticeably, the Walvis Ridge has been shown to function as a barrier for the dispersal of some crustacean species of Peracarida (Brandt et al, 2005), but it is not known whether this physical barrier also affects microbial dispersal.…”

Section: Introductionmentioning

confidence: 99%

Bacterial diversity and biogeography in deep-sea surface sediments of the South Atlantic Ocean

et al. 2009

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Microbial biogeographic patterns in the deep sea depend on the ability of microorganisms to disperse. One possible limitation to microbial dispersal may be the Walvis Ridge that separates the Antarctic Lower Circumpolar Deep Water from the North Atlantic Deep Water. We examined bacterial communities in three basins of the eastern South Atlantic Ocean to determine diversity and biogeography of bacterial communities in deep-sea surface sediments. The analysis of 16S ribosomal RNA (rRNA) gene clone libraries in each basin revealed a high diversity, representing 521 phylotypes with 98% identity in 1051 sequences. Phylotypes affiliated with Gammaproteobacteria, Deltaproteobacteria and Acidobacteria were present in all three basins. The distribution of these shared phylotypes seemed to be influenced neither by the Walvis Ridge nor by different deep water masses, suggesting a high dispersal capability, as also indicated by low distance–decay relationships. However, the total bacterial diversity showed significant differences between the basins, based on 16S rRNA gene sequences as well as on terminal restriction fragment length polymorphism fingerprints. Noticeably, both geographic distance and environmental heterogeneity influenced bacterial diversity at intermediate (10–3000 km) and large scales (>3000 km), indicating a complex interplay of local contemporary environmental effects and dispersal limitation.

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Diversity of peracarid crustaceans (Malacostraca) from the abyssal plain of the Angola Basin

Cited by 85 publications

References 47 publications

WITHDRAWN: Wide distribution ranges of several microbial eukaryotes of nanofaunal size at abyssal depths of the South-East Atlantic and the Mediterranean

WITHDRAWN: Wide distribution ranges of several microbial eukaryotes of nanofaunal size at abyssal depths of the South-East Atlantic and the Mediterranean

The dynamics of biogeographic ranges in the deep sea

Bacterial diversity and biogeography in deep-sea surface sediments of the South Atlantic Ocean

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