Euphausiid “dead body rain” as a source of food for abyssal benthos

Sokolova, M. N.

doi:10.1016/0967-0637(94)90052-3

Cited by 27 publications

(26 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They are known to exhibit cannibalistic behavior when maintained in crowded aquaria ) and have been observed attacking live fish that are restrained on a hook and line (Smith and Baldwin 1984;Thurston 1990). Alternatively, the interspecific d 15 N signatures may reflect the changing availability of food with depth, as both detrital quality and hadal biodiversity are thought to decrease with depth (Belyaev 1989;Sokolova 1994). Notably, the apparent discrepancy between the interspecific diet congruence reported in Blankenship and Yayanos (2005) and the interspecific d 15 N differences reported here may stem from the limitations and biases inherent in each type of analysis.…”

Section: Discussioncontrasting

confidence: 49%

“…Both trenches exceed 10 km in depth and contain similar scavenging assemblages (Blankenship et al 2006). Because of increased primary productivity at higher latitudes, detritus reaching the Kermadec Trench floor is probably greater in quality and quantity than detrital deposition in the Tonga Trench (Sokolova 1986). As a result, the Kermadec Trench benthic community should also exhibit higher biomass.…”

Section: Discussionmentioning

confidence: 99%

“…Size-related correlations for S. schellenbergi, Two-source mixing models: Estimating the importance of carrion-Surface-derived nutrient input to the deep-sea benthos can be dichotomized into two components: detritus (dead organic matter including fecal pellets), which provides the main carbon source for deep-sea benthos, and larger carrion that experiences negligible bacterial degradation before reaching the seafloor bottom (Sokolova 1986). Pelagic organisms living near the ocean's surface exhibit comparable d 13 C signatures, but microbes continually metabolize sinking organic matter (Sokolova 1986), depleting the heavier 13 C isotope. Consequently, trench floor detritus and its consumers should be isotopically lighter than large carrion (Fry and Sherr 1984).…”

Section: Methodsmentioning

confidence: 99%

“…data). Detrital flux should also be of extremely low quantity and quality (Sokolova 1994), and this is evidenced by the paucity of hadal meiofaunal diversity and biomass, even of Foraminifera (Belyaev 1989;Tudo 2003). Moreover, the steep slopes of the trench walls restrict the spatial extent of the habitat.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Extreme food webs: Foraging strategies and diets of scavenging amphipods from the ocean’s deepest 5 kilometers

Blankenship

Levin

2007

Limnology & Oceanography

106

View full text Add to dashboard Cite

We explore hypotheses that alternate foraging strategies, diet, or nutrient partitioning could help explain the success of scavenging Lysianassoids (Amphipoda) in hadal oligotrophic trenches (depths of 6-11 km) by examining the nutritional strategies of four lysianassoid species (Eurythenes gryllus, Scopelocheirus schellenbergi, Hirondellea dubia, and Uristes sp. nov.) collected with baited traps (6.3-10.8 km) from the oligotrophic Tonga and Kermadec Trenches (southwest Pacific Ocean). Diets and foraging strategies were examined by use of (1) the nascent DNA-based analysis of hindgut contents, which provides a 'snapshot' of recently ingested organisms, and (2) natural abundance isotopic signatures, which reflect the source of nutrition and relative trophic position. The scavenging guild exhibits remarkable trophic plasticity, and each amphipod species employs alternate foraging modes, including detrivory or predation, to supplement necrophagy. The nutritional strategies of some species appear to shift with age, depth, and even between trenches. Thus, there is no single ubiquitous hadal food web; rather it is influenced by depth and overlying surface productivity. Isotopic data suggest that coexisting species partition the dietary items, providing evidence of competition among members of the scavenging guild. The extreme foraging flexibility of scavenging amphipods may ultimately contribute to their success in severely foodlimited hadal ecosystems.

show abstract

Section: Discussioncontrasting

confidence: 49%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Extreme food webs: Foraging strategies and diets of scavenging amphipods from the ocean’s deepest 5 kilometers

Blankenship

Levin

2007

Limnology & Oceanography

106

View full text Add to dashboard Cite

show abstract

“…The size (measured from tip of rostrum to the end of the telson along the dorsal edge) spectra cover a range from 3.8 to 14.5 mm. The majority of individuals were juvenile (507), while 89 specimens were female (4 ovigerous) and 97 individuals were male feeding on a variety of food items including smaller carcasses or zooplankton remains, of which the latter may contribute signi®cantly to the carbon¯ux to the sea¯oor (Sokolova 1994;Weslawski and Legezynska 1998). If so, smaller carcasses might be utilized with higher probability by local populations of facultative necrophages while larger ones may be utilized by temporary invaders.…”

Section: Discussionmentioning

confidence: 99%

Deep-sea food falls: first observation of a natural event in the Arctic Ocean

Klages¹,

Vopel²,

Bluhm³

et al. 2001

Polar Biol

View full text Add to dashboard Cite

Concentrations of scavengers attracted by bait in the deep sea are documented by time-lapse photography and results of baited traps. During a remotely operated vehicle deployment in the Molloy Deep, the deepest depression of the Fram Strait, the carcass of a natant decapod, Pasiphaea tarda Krùyer, 1845, was discovered at 79°08.4¢N and 002°49.85¢E in a depth of 5,551 m. The carcass was covered by hundreds of individuals of Uristes sp., a scavenging lysianassoid amphipod. After documentation of this event, both the carcass and the majority of amphipods were collected. This is the ®rst reported observation and sampling of an ongoing feeding process of scavengers on a natural food fall in the deep sea.

show abstract

Response of benthic microbial communities to chitin enrichment: an in situ study in the deep Arctic Ocean

et al. 2008

View full text Add to dashboard Cite

In situ enrichment experiments were carried out in the Arctic deep sea (Fram Strait region) to observe the response of benthic microbial communities to chitin supply. Chambers of a benthic lander were Wlled in July 2004 with deep-sea sediments enriched with 1.3-7.0 g m ¡2 of chitin and the eVects of chitin enrichment were assessed on the microbial hydrolytic activity potential, cell number and community structure after periods of 1 week and 1 year of in situ deployment. The input of chitin had no eVect on microbial abundance and chitobiase activity after 7 days of incubation, whereas community structure in enriched sediments, determined by terminal restriction fragment length polymorphism analysis of 16S rRNA genes, was diVerent from the controls. After 1 year, microbial numbers and activity signiWcantly increased in sediments enriched with high chitin concentrations and bacterial community structure was diVerent from that of the other treatments. The present study suggests that microbial community structure in Arctic deep-sea sediments can react quickly to sudden large chitin inputs into the sediments and that this appears to precondition subsequent enhanced growth and enzymatic activity changes.

show abstract

Euphausiid “dead body rain” as a source of food for abyssal benthos

Cited by 27 publications

References 0 publications

Extreme food webs: Foraging strategies and diets of scavenging amphipods from the ocean’s deepest 5 kilometers

Extreme food webs: Foraging strategies and diets of scavenging amphipods from the ocean’s deepest 5 kilometers

Deep-sea food falls: first observation of a natural event in the Arctic Ocean

Response of benthic microbial communities to chitin enrichment: an in situ study in the deep Arctic Ocean

Contact Info

Product

Resources

About