Species and Functional Diversity of Deep-Sea Nematodes in a High Energy Submarine Canyon

Liao, Jian-Xiang; Wei, Chih‐Lin; Yasuhara, Moriaki

doi:10.3389/fmars.2020.00591

Cited by 12 publications

(21 citation statements)

References 109 publications

(194 reference statements)

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“…The body size compositions in the canyon also differed from the non-canyon habitats, indicating that the energetic GPSC not only impacted the body size structure (i.e., steeper NBSS) but also the growth and metabolism of populations and communities (Brey, 1999;Sukhotin et al, 2002;Moyano et al, 2017). Likewise, our results were consistent with the previous studies, showing lower abundance, species diversity, functional diversity, and distinctive species composition in the GPSC compared to the adjacent slope habitat (Liao et al, 2017;Liao et al, 2020). Together, the multifaceted characteristics of community structure from this and previous studies suggest that GPSC is a high-energy and disturbed environment for the local benthic communities.…”

Section: Discussionsupporting

confidence: 90%

“…While unintentionally, the deposit-feeding macrofauna may consume meiofauna living in interstitial sediment spaces (Iken et al, 2001;Jumars et al, 2015). Liao et al (2017;Liao et al 2020) also examined the feeding strategies of polychaete and nematode specimens from this study. They found the polychaete feeding modes ranging from deposit feeders, carnivores, scavengers, omnivores, and suspension feeders, and nematodes from deposit feeders, epigrowth feeders, and omnivores/predators.…”

Section: Discussionmentioning

confidence: 99%

“…All relevant analyses can be reproduced from the R codes and data deposited in an R data package bsss, available at https://github.com/ chihlinwei/bbbs. Liao et al (2017;Liao et al 2020) analyzed the environmental data used in this study (Figure S1). Generally, they found that the modeled bottom current velocity (Spd) and duration of sediment erosion (Over20) increased in the canyon and toward the canyon head.…”

Section: Statistical Testmentioning

confidence: 99%

“…However, in the southwest Taiwan continental margin, the Gaoping Submarine Canyon (GPSC) is connected to a small mountainous river (Chiang et al, 2020;Chiang and Yu, 2022). The extremely high sediment load, frequent turbidity currents, and strong internal tides within the river-fed GPSC result in a highly disturbed seabed environment (Chiou et al, 2011;Lin et al, 2013;Liu et al, 2016), suppressing the abundance and diversity of the benthos (Liao et al, 2017;Liao et al, 2020). This study's principal objective was to use a size-based approach to examine community responses under intense disturbances in the submarine canyon.…”

Section: Introductionmentioning

confidence: 99%

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Response of the benthic biomass-size structure to a high-energy submarine canyon

et al. 2023

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IntroductionBody size regulates all biological processes, including growth, reproduction, metabolism, trophic interactions, etc., and is the master trait across organisms, populations, and communities. Despite a rich literature on the impacts of human and natural disturbances on body size, a clear knowledge gap is the effect of the submarine canyons on the benthic size structures in the deep sea, hindering our understanding of the ecological processes of these dominant ecosystems on the continental margin.MethodsTherefore, we conducted repeated sediment sampling to compare meiofauna and macrofauna biomass body-size spectrum, growth, metabolism, and size composition from a high-energy submarine canyon, Gaoping Submarine Canyon (GPSC), and the adjacent continental slope off SW Taiwan. The GPSC is a dynamic ecosystem connected to a high sediment-yield small mountain river subjected to strong internal-tide energy, swift bottom currents, frequent mass wasting events, and high terrestrial sediment inputs.ResultsWe found that the meiofauna and macrofauna were characterized by relatively larger individuals dominating on the slope to smaller ones dominating in the canyon. As a result, the community biomass, secondary production, and respiration were depressed with distinctive biomass-size composition in the canyon compared to the non-canyon slope. The environmental factors related to internal tide disturbance (i.e., bottom current velocity, duration of sediment erosion, or low light transmission) substantially influence the body size composition of the canyon benthos, while food supplies (i.e., TOC and C/N ratio) and sediment characters (i.e., grain size and porosity) correlated closely with the slope communities.DiscussionWe concluded that the disturbed condition in the GPSC may have wiped out or depressed the local benthic assemblages, and only the smaller, more resilient species could persist. Our results also highlight that the alterations of the canyon benthic community could be a reference to deep-sea ecosystems under anthropogenic disturbances or global climate change.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Statistical Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Response of the benthic biomass-size structure to a high-energy submarine canyon

et al. 2023

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“…Moreover, canyon heads, in comparison with major habitats along the continental margins, have the highest benthic standing stocks [58,59]. Physical disturbances (e.g., turbidity currents, bottom currents, and gravity flows) within the Kaoping Canyon substantially suppress vulnerable macrofaunal taxa [58], decreasing the number of species and functional diversity of nematode assemblages [60]. Apparently, the river-connected Kaoping Canyon has more river-borne nutrients than the neighboring shelf-incising Fangliao Canyon and likely greater biodiversity.…”

Section: Oceanographic Conditions and Biological Distributions Of Submarine Canyonsmentioning

confidence: 99%

Morphological Significance and Relation of Ecosystems of Submarine Canyons off SW Taiwan

Chiang

2021

JMSE

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There are four shelf-incising submarine canyons off SW Taiwan. They are distributed along the active continental margin, which is periodically flushed by gravity flows. Shelf-incising canyons, such as Kaoping Canyon, may not only be affected by oceanographic conditions but also by extreme climate change due to the direct input of river sediment. In the canyons along the SW margin of Taiwan, strong sedimentary flows are reflected in highly abundant nutrient input and physical disturbances. The Kaoping Canyon possesses habitats that promote biodiversity but that are sensitive to environmental change. The aims of this study are to review the canyons along the SW margin of Taiwan and to present their geomorphological features and associated ecosystems.

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Marine Meiofauna Diversity and Biogeography—Paradigms and Challenges

Vanreusel

Arbizu

Yauhara³

2023

New Horizons in Meiobenthos Research

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Species and Functional Diversity of Deep-Sea Nematodes in a High Energy Submarine Canyon

Cited by 12 publications

References 109 publications

Response of the benthic biomass-size structure to a high-energy submarine canyon

Response of the benthic biomass-size structure to a high-energy submarine canyon

Morphological Significance and Relation of Ecosystems of Submarine Canyons off SW Taiwan

Marine Meiofauna Diversity and Biogeography—Paradigms and Challenges

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