scholarly journals Methane Seep in Shallow-Water Permeable Sediment Harbors High Diversity of Anaerobic Methanotrophic Communities, Elba, Italy

2016 ◽  
Vol 7 ◽  
Author(s):  
S. Emil Ruff ◽  
Hanna Kuhfuss ◽  
Gunter Wegener ◽  
Christian Lott ◽  
Alban Ramette ◽  
...  
Keyword(s):  
Shallow Water ◽  
Methane Seep ◽  
Permeable Sediment ◽  
High Diversity ◽  
Methanotrophic Communities

Some Cheilostomata (Bryozoa) from the Java Sea, central Indonesian Archipelago, with a description of Pleurocodonellina jeparaensis n. sp. (Smittinidae)

Zootaxa ◽  
2019 ◽  
Vol 4668 (3) ◽  
pp. 329-342
Author(s):  
M.A. ASAGABALDAN ◽  
N. BOURGOUGNON ◽  
G. BEDOUX ◽  
R. KRISTIANA ◽  
D. AYUNINGRUM ◽  
...  
Keyword(s):  
New Species ◽  
Shallow Water ◽  
National Park ◽  
Marine Organisms ◽  
Indonesian Archipelago ◽  
South Central ◽  
Shell Fragment ◽  
Java Sea ◽  
Bivalve Shell ◽  
High Diversity

The Java Sea region has a high diversity of marine organisms of interest to scientists and tourists alike. Neglected among this diversity are intertidal bryozoans, relatively few of which have been reported from this area. Here we describe six species, one of which is new to science. These were collected from three shallow-water localities—Karimunjawa Marine National Park, Awur Bay and Panjang Island—in the south-central part of the sea. The five known species belong to the families Candidae, Poricellariidae, Onychocellidae, Lepraliellidae, and Phidoloporidae. The new species, Pleurocodonellina jeparaensis n. sp. (Smittinidae), is found at Awur Bay, attached to a bivalve shell fragment. Biogeographically, the suite of species is predominantly tropical Indo-West Pacific in distribution, representing a small fraction of the additional hundreds of species that are anticipated for the Java Sea region. 

scholarly journals Fauna associated with shallow-water methane seeps in the Laptev Sea

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9018 ◽  
Author(s):  
Andrey A. Vedenin ◽  
Valentin N. Kokarev ◽  
Margarita V. Chikina ◽  
Alexander B. Basin ◽  
Sergey V. Galkin ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Shallow Water ◽  
Control Area ◽  
Laptev Sea ◽  
Methane Seep ◽  
Methane Seeps ◽  
Methane Seepage ◽  
Macrobenthic Community Structure ◽  
Benthic Ecosystems ◽  
Siberian Shelf

Background Methane seeps support unique benthic ecosystems in the deep sea existing due to chemosynthetic organic matter. In contrast, in shallow waters there is little or no effect of methane seeps on macrofauna. In the present study we focused on the recently described methane discharge area at the northern Laptev Sea shelf. The aim of this work was to describe the shallow-water methane seep macrofauna and to understand whether there are differences in macrobenthic community structure between the methane seep and background areas. Methods Samples of macrofauna were taken during three expeditions of RV Akademik Mstislav Keldysh in 2015, 2017 and 2018 using 0.1 m2 grabs and the Sigsbee trawl. 21 grabs and two trawls in total were taken at two methane seep sites named Oden and C15, located at depths of 60–70 m. For control, three 0.1 m2 grabs were taken in area without methane seepage. Results The abundance of macrofauna was higher at methane seep stations compared to non-seep sites. Cluster analysis revealed five station groups corresponding to control area, Oden site and C15 site (the latter represented by three groups). Taxa responsible for differences among the station groups were mostly widespread Arctic species that were more abundant in samples from methane seep sites. However, high densities of symbiotrophic siboglinids Oligobrachia sp. were found exclusively at methane seep stations. In addition, several species possibly new to science were found at several methane seep stations, including the gastropod Frigidalvania sp. and the polychaete Ophryotrocha sp. The fauna at control stations was represented only by well-known and widespread Arctic taxa. Higher habitat heterogeneity of the C15 site compared to Oden was indicated by the higher number of station groups revealed by cluster analysis and higher species richness in C15 trawl sample. The development of the described communities at the shallow-water methane seeps can be related to pronounced oligotrophic environment on the northern Siberian shelf.

Leptogorgia christiae (Octocorallia: Gorgoniidae) a new shallow water gorgonian from Pacific Panama

2008 ◽  
Vol 88 (4) ◽  
pp. 719-722 ◽  
Author(s):  
Hector M. Guzman ◽  
Odalisca Breedy
Keyword(s):  
New Species ◽  
Shallow Water ◽  
The Other ◽  
Eastern Pacific ◽  
New Taxon ◽  
Branching Pattern ◽  
Rocky Outcrop ◽  
Shallow Water Species ◽  
Water Species ◽  
High Diversity

Leptogorgia christiae is a rarely collected new species found at 15–30 m depth at Roca Hacha, a rocky outcrop near Coiba Island characterized by its high diversity of octocorals. The branching pattern and combination of asymmetric blunt spindles, abundance of capstans, and a low occurrence of acute spindles are distinct characteristics of the new taxon. The new species is described, illustrated and compared to the other species of the genus reported from Pacific Panama; thus increasing the total of Leptogorgia species to 17, which encompasses over 70% of the shallow water species for the eastern Pacific.

Spatial assemblage structure of shallow-water reef fish in Southwest Australia

2020 ◽  
Vol 649 ◽  
pp. 125-140
Author(s):  
DS Goldsworthy ◽  
BJ Saunders ◽  
JRC Parker ◽  
ES Harvey
Keyword(s):  
Shallow Water ◽  
Reef Fish ◽  
Marine Environment ◽  
Fish Assemblages ◽  
Canopy Cover ◽  
Reef Fishes ◽  
Reef Fish Assemblage ◽  
Reef Type ◽  
Present Distribution ◽  
Southwest Australia

Bioregional categorisation of the Australian marine environment is essential to conserve and manage entire ecosystems, including the biota and associated habitats. It is important that these regions are optimally positioned to effectively plan for the protection of distinct assemblages. Recent climatic variation and changes to the marine environment in Southwest Australia (SWA) have resulted in shifts in species ranges and changes to the composition of marine assemblages. The goal of this study was to determine if the current bioregionalisation of SWA accurately represents the present distribution of shallow-water reef fishes across 2000 km of its subtropical and temperate coastline. Data was collected in 2015 using diver-operated underwater stereo-video surveys from 7 regions between Port Gregory (north of Geraldton) to the east of Esperance. This study indicated that (1) the shallow-water reef fish of SWA formed 4 distinct assemblages along the coast: one Midwestern, one Central and 2 Southern Assemblages; (2) differences between these fish assemblages were primarily driven by sea surface temperature, Ecklonia radiata cover, non-E. radiata (canopy) cover, understorey algae cover, reef type and reef height; and (3) each of the 4 assemblages were characterised by a high number of short-range Australian and Western Australian endemic species. The findings from this study suggest that 4, rather than the existing 3 bioregions would more effectively capture the shallow-water reef fish assemblage patterns, with boundaries having shifted southwards likely associated with ocean warming.

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