Response of Meiofauna to Immediate Benthic Disturbance in the Central Indian Ocean Basin

Ingole, Baban; Ansari, Z.A.; Rathod, Vijayakumar; Rodrigues, Nimi

doi:10.1080/10641190009353794

Cited by 28 publications

(18 citation statements)

References 4 publications

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“…In addition to the physical disturbance due to mineral deposit extraction, the reduction in habitat heterogeneity (Zeppilli et al 2014) may permanently alter the structure of benthic communities (Leduc et al 2015 and references therein). Benthic meiofauna from polymetallic nodule areas are known from the Pacific Ocean (Hessler and Jumars 1974;Snider et al 1984;Renaud-Mornant and Gourbault 1990;Bussau et al 1995;Ahnert and Schriever 2001;Radziejewska 2002;Lambshead et al 2003;Veillette et al 2007a, b;Miljutin and Miljutina 2009a, b;Miljutina et al 2010Miljutina et al , 2011Miljutina and Miljutin 2012) and Indian Ocean (Parulekar et al 1982;Ansari 2000;Ingole et al 2000Ingole et al , 2005Singh et al 2014). The techniques used for the extraction of nodules from the seafloor involve mechanical screening, bucket or scraper methods or hydraulic approaches to lift the nodules from the seafloor (Thiel 2003).…”

Section: Exploitation Of Mineral Resourcesmentioning

confidence: 99%

Is the meiofauna a good indicator for climate change and anthropogenic impacts?

et al. 2015

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Our planet is changing, and one of the most pressing challenges facing the scientific community revolves around understanding how ecological communities respond to global changes. From coastal to deep-sea ecosystems, ecologists are exploring new areas of research to find model organisms that help predict the future of life on our planet. Among the different categories of organisms, meiofauna offer several advantages for the study of marine benthic ecosystems. This paper reviews the advances in the study of meiofauna with regard to climate change and anthropogenic impacts. Four taxonomic groups are valuable for predicting global changes: foraminifers (especially calcareous forms), nematodes, copepods and ostracods. Environmental variables are fundamental in the interpretation of meiofaunal patterns and multistressor experiments are more informative than single stressor ones, revealing complex ecological and biological interactions. Global change has a general negative effect on meiofauna, with important consequences on benthic food webs. However, some meiofaunal species can be favoured by the extreme conditions induced by global change, as they can exhibit remarkable physiological adaptations. This review highlights the need to incorporate studies on taxonomy,

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Section: Exploitation Of Mineral Resourcesmentioning

confidence: 99%

Is the meiofauna a good indicator for climate change and anthropogenic impacts?

et al. 2015

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“…During the pre-disturbance study, majority (>75%) of the meiofauna was concentrated in the upper most sediment layer and a similar pattern of vertical disturbance was observed during the post-disturbance (Ingole 2000). However, there was considerable (40%) reduction in the total meiofaunal density in the top 2-3 cm sediment layer in post disturbance.…”

Section: Discussionmentioning

confidence: 52%

“…described the location and characteristics of the test and reference site as well as experimental design and procedures followed. The immediate response of benthic community to sediment disturbance indicated a significant ≈40% reduction in the benthic population at taxon as well as community levels (Ingole et al, 2000;. The present investigation is a part of the monitoring phase of the INDEX programme conducted 44 months after initial disturbance.…”

Section: Introductionmentioning

confidence: 81%

“…Nematodes and copepods showed differences between samples collected before and immediately after the disturbance (Ingole et al, 2000). The nematode: copepod (N:C) ratio frequently used as environmental indicator (Warwick, 1981;Danovaro et al, 1995;Ingole et al, 2000;Kim et al, 2000;Ansari and Ingole, 2002) was used to assess the restoration process.…”

Section: Discussionmentioning

confidence: 99%

“…The nematode: copepod (N:C) ratio frequently used as environmental indicator (Warwick, 1981;Danovaro et al, 1995;Ingole et al, 2000;Kim et al, 2000;Ansari and Ingole, 2002) was used to assess the restoration process.…”

Section: Discussionmentioning

confidence: 99%

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Recovery of Deep-sea Meiofauna after Artificial Disturbance in the Central Indian Basin

Ingole

Goltekar

Gonsalves

et al. 2005

Marine Georesources & Geotechnology

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Colonization of deep-sea (5000-5500-m depths) metazoan meiofaunal assemblage (in terms of abundance and community structure) were investigated in the Central Indian Ocean Basin (CIOB), immediately after and also 44 months after a benthic disturbance experiment. The abundance of nematodes, which are normally dominating the deep-sea meiofauna, was reduced (by 50%; p<0.001) in post-disturbance. The density of meiofauna was generally low during the monitoring phase and varied moderately inside and outside the test area Bringing up nutrients from sub-surface and depositing this organically rich material on the sediment surface, could have acted as a stimulating factor for meiofaunal recovery as most of the meiofauna feed on bacteria and dead organic material (DOM). This experimental study suggests that whereas on one hand commercial mining of the deep-sea mineral resources may affect deep-sea benthic communities immediately after the impact, on other hand, availability of food material due to turn over (similar to plowing) of sediments may help recolonisation at temporal scale.

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