Variation of geochemical environments associated with whale-fall biomass mineralization processes in the sediment during the mobile scavenger, enrichment opportunist, and sulfophilic stages

Onishi, Yuji; Shimamura, Sho; Yamanaka, Toshiro; Nakayama, Rei; Miyazaki, Masaru; Tsunogai, Urumu; Fujiwara, Yoshihiro

doi:10.1007/s00227-018-3398-8

Cited by 7 publications

(4 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Over time, the impact of nutrients released from whale carcasses or remains expanded laterally, with some researchers observing an increase in bacterial diversity and total organic carbon (TOC) content at distances of up to 20 m from the whale bones . Related studies have shown that, methanogenic bacteria are predominantly archaea (98%) in whale fall sediments, including Methanomicrobiales and Methanosarcinales (Onishi et al, 2018). Temporal changes in this archaeal community included the early establishment of methylotrophic methanogens followed by development of methanogens thought to be hydrogenotrophic, as well as members related to the newly described methanotrophic lineage, ANME-3.…”

Section: Effects Of Whale Fall On the Deep-sea Microbesmentioning

confidence: 93%

Review of the Impact of Whale Fall on Biodiversity in Deep-Sea Ecosystems

Liu²,

Guo³

et al. 2022

Front. Ecol. Evol.

View full text Add to dashboard Cite

“Whale Fall” is a collective term for the whale carcass, the process of dead whale fall, and the formed deep-sea ecosystem. The whale fall process produces a lot of unstable organic matter that has a significant impact on deep-sea ecosystems. Scientists speculate that organic matter input is the source of energy and material for organisms in deep-sea ecosystems. In the seafloor of the North Pacific, whale fall supports the survival of at least 12,490 organisms of 43 species, contributing to the prosperity of deep-sea life. Due to the specificity of the time and space of the formation of whale fall, there are few studies on whale fall and its impact on the deep-sea ecosystem. This article summarizes and analyses the current research status on the distribution of whale fall and its impact on the deep-sea ecosystem at home and abroad. The results show that the current distribution of whale fall is mainly concentrated in the Pacific and Atlantic regions, and the research on the impact of whale fall on deep-sea ecosystems focuses on the formation process, degradation rate and impact on deep-sea biological systems. This article has some significance to the understanding of biodiversity and ecosystem succession in the deep-sea “desert area.”

show abstract

Section: Effects Of Whale Fall On the Deep-sea Microbesmentioning

confidence: 93%

Review of the Impact of Whale Fall on Biodiversity in Deep-Sea Ecosystems

Liu²,

Guo³

et al. 2022

Front. Ecol. Evol.

View full text Add to dashboard Cite

show abstract

“…but were not seen in any location on the present remains. This is somewhat surprising given how rapidly Osedax may colonize whale fall sites (within as little as two weeks to two months; e.g., Onishi et al 2018;Silva et al 2021), and the densities of one species, O. antarcticus, observed on B. bonaerensis bones deployed nearby for 14 months (up to 202 individuals/m 2 ; Glover et al 2013). If present, O. antarcticus should have been readily visible, given their emergent palp length of up to 25 mm and known willingness to colonise vertebrae of this whale species, as observed by Glover et al (2013).…”

Section: Discussionmentioning

confidence: 99%

In-situ observations of an intact natural whale fall in Palmer deep, Western Antarctic Peninsula

et al. 2023

View full text Add to dashboard Cite

Whale carcasses on the seafloor support unique, ephemeral communities of organisms, and ‘natural’ whale fall sites are infrequently encountered, especially in polar regions. During a manned submersible dive in early 2017, we discovered the skeleton of an Antarctic minke whale (Balaenoptera bonaerensis) at 963 m in Palmer Deep, in the Western Antarctic Peninsula. The site was filmed in HD for approximately two hours, enabling visual identification of representatives from at least eight phyla, although physical sampling was not possible. The remains appeared to be in the late ‘enrichment–opportunistic’ phase (although some mobile scavengers were still present and some sulfonic activity had already commenced), with polychaetes of the order Aciculata, and family Ampharetidae, plus several amphipod species, most abundant. Novel eusirid amphipod and rhodaliid siphonophore taxa were also present. The observed faunal distribution suggests patterns consistent with reports from other Antarctic whale falls (both experimental and natural). This discovery represents the highest-latitude natural whale fall reported to date.

show abstract

“…In the laboratory, around 10 g of the subsample sediments were used for AVS extraction on the sampling day, according to the procedures described by Onishi, Shimamura, et al (2018), Onishi, Yamanaka, et al (2018). The AVS in the sediment was extracted as H 2 S by addition of 47% sulfuric acid to the sample.…”

Section: Methodsmentioning

confidence: 99%

“…Sulfate concentrations in lake water and pore water samples were measured using an ion chromatograph (ICS‐1600; Dionex Corp., USA) with greater than 5% accuracy. In addition, the sulfate in lake water was recovered as precipitated BaSO 4 (Onishi, Shimamura, et al, 2018; Onishi, Yamanaka, et al, 2018; Yamanaka et al, 1999). The water content of the sediment was found by drying the fresh subsamples (48 h at 105°C).…”

Section: Methodsmentioning

confidence: 99%

Major contribution of sulfide‐derived sulfur to the benthic food web in a large freshwater lake

2023

Self Cite

View full text Add to dashboard Cite

In freshwater systems, contributions of chemosynthetic products by sulfur‐oxidizing bacteria in sediments as nutritional resources in benthic food webs remain unclear, even though chemosynthetic products might be an important nutritional resource for benthic food webs in deep‐sea hydrothermal vents and shallow marine systems. To study geochemical aspects of this trophic pathway, we sampled sediment cores and benthic animals at two sites (90 and 50 m water depths) in the largest freshwater (mesotrophic) lake in Japan: Lake Biwa. Stable carbon, nitrogen, and sulfur isotopes of the sediments and animals were measured to elucidate the sulfur nutritional resources for the benthic food web precisely by calculating the contributions of the incorporation of sulfide‐derived sulfur to the biomass and of the biogeochemical sulfur cycle supporting the sulfur nutritional resource. The recovered sediment cores showed increases in 34S‐depleted sulfide at 5 cm sediment depth and showed low sulfide concentration with high δ34S in deeper layers, suggesting an association of microbial activities with sulfate reduction and sulfide oxidation in the sediments. The sulfur‐oxidizing bacteria may contribute to benthic animal biomass. Calculations based on the biomass, sulfur content, and contribution to sulfide‐derived sulfur of each animal comprising the benthic food web revealed that 58%–67% of the total biomass sulfur in the benthic food web of Lake Biwa is occupied by sulfide‐derived sulfur. Such a large contribution implies that the chemosynthetic products of sulfur‐oxidizing bacteria are important nutritional resources supporting benthic food webs in the lake ecosystems, at least in terms of sulfur. The results present a new trophic pathway for sulfur that has been overlooked in lake ecosystems with low‐sulfate concentrations.

show abstract

Variation of geochemical environments associated with whale-fall biomass mineralization processes in the sediment during the mobile scavenger, enrichment opportunist, and sulfophilic stages

Cited by 7 publications

References 38 publications

Review of the Impact of Whale Fall on Biodiversity in Deep-Sea Ecosystems

Review of the Impact of Whale Fall on Biodiversity in Deep-Sea Ecosystems

In-situ observations of an intact natural whale fall in Palmer deep, Western Antarctic Peninsula

Major contribution of sulfide‐derived sulfur to the benthic food web in a large freshwater lake

Contact Info

Product

Resources

About