Nematode communities inhabiting the soft deep-sea sediment in polymetallic nodule fields: do they differ from those in the nodule-free abyssal areas?

Autor:	Ravail Singh, Dmitry M. Miljutin, Valentina V. Galtsova, Alexei V. Tchesunov, Christian Bussau, Ann Vanreusel, Maria M. Miljutina, Pedro Martínez Arbizu, Teresa Radziejewska
Rok vydání:	2016
Předmět:	0106 biological sciences Nodule (geology) biology Ecology 010604 marine biology & hydrobiology Sediment Fracture zone Aquatic Science Structural basin engineering.material Oceanography biology.organism_classification 010603 evolutionary biology 01 natural sciences Deep sea Abyssal zone Indian ocean Nematode engineering Ecology Evolution Behavior and Systematics
Zdroj:	Marine Biology Research. 12:345-359
ISSN:	1745-1019 1745-1000
DOI:	10.1080/17451000.2016.1148822
Popis:	This study addresses whether or not nematode assemblages inhabiting the soft sediment in abyssal nodule fields are unique and differ from those occurring in the nodule-free abyssal areas. This question is important for the evaluation of possible diversity losses caused by nodule mining operations. The analysis involved seven datasets at genus-level of nematode assemblages from three nodule-bearing abyssal areas in the Pacific (the Clarion-Clipperton Fracture Zone or CCFZ, and the Peru Basin) and the Indian Ocean (CIOB), and five datasets from nodule-free abyssal regions (the Atlantic Ocean). Only individuals identified to valid genera were used in the analysis. Overall, more than 20,000 nematode individuals from 90 samples were analysed. The analyses showed that the nematode communities in the nodule fields did differ from those in the nodule-free abyss. The nodule fields are characterized by a higher microhabitat heterogeneity, which resulted in a higher diversity of nematode communities inhabiting the nodule fields. However, one set of dominant taxa (Monhysteridae, Microlaimus, Acantholaimus, Theristus and Desmoscolex) was identical for both the nodule-bearing and nodule-free abyss, although some genera were strongly and significantly associated with either the nodule-free abyss (Microlaimus) or the nodule-bearing abyssal regions (Capsula). On the other hand, nematode assemblages at nodule-bearing and nodule-free sites within the nodule-bearing abyss proved to be similar at the genus level. This makes it possible for the nodule-free sites to serve as donors of colonizers for the mining-impacted nodule-bearing abyss. However, this suggestion has to be treated with caution, because the species-level differences have not been tested yet.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e1033a06fc82bc8a18a849726955b99 https://doi.org/10.1080/17451000.2016.1148822 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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