Differential processing of dissolved and particulate organic matter by deep-sea sponges and their microbial symbionts.
Deep-sea sponges create hotspots of biodiversity and biological activity in the otherwise barren deep-sea. However, it remains elusive how sponge hosts and their microbial symbionts acquire and process food in these food-limited environments. Therefore, we traced the processing (i.e. assimilation an...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/409308 2023-12-03T10:26:59+01:00 Differential processing of dissolved and particulate organic matter by deep-sea sponges and their microbial symbionts. Bart, Martijn C. de Kluijver, Anna Hoetjes, Sean Absalah, Samira Mueller, Benjamin Kenchington, Ellen Tore Rapp, Hans de Goeij, Jasper M. Geochemistry Bio-, hydro-, and environmental geochemistry 2020-10-15 application/pdf https://dspace.library.uu.nl/handle/1874/409308 en eng 2045-2322 https://dspace.library.uu.nl/handle/1874/409308 info:eu-repo/semantics/OpenAccess Article 2020 ftunivutrecht 2023-11-08T23:19:32Z Deep-sea sponges create hotspots of biodiversity and biological activity in the otherwise barren deep-sea. However, it remains elusive how sponge hosts and their microbial symbionts acquire and process food in these food-limited environments. Therefore, we traced the processing (i.e. assimilation and respiration) of 13C- and 15N-enriched dissolved organic matter (DOM) and bacteria by three dominant North Atlantic deep-sea sponges: the high microbial abundance (HMA) demosponge Geodia barretti, the low microbial abundance (LMA) demosponge Hymedesmia paupertas, and the LMA hexactinellid Vazella pourtalesii. We also assessed the assimilation of both food sources into sponge- and bacteria-specific phospholipid-derived fatty acid (PLFA) biomarkers. All sponges were capable of assimilating DOM as well as bacteria. However, processing of the two food sources differed considerably between the tested species: the DOM assimilation-to-respiration efficiency was highest for the HMA sponge, yet uptake rates were 4–5 times lower compared to LMA sponges. In contrast, bacteria were assimilated most efficiently and at the highest rate by the hexactinellid compared to the demosponges. Our results indicate that phylogeny and functional traits (e.g., abundance of microbial symbionts, morphology) influence food preferences and diet composition of sponges, which further helps to understand their role as key ecosystem engineers of deep-sea habitats. Article in Journal/Newspaper North Atlantic Utrecht University Repository |
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Open Polar |
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Utrecht University Repository |
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ftunivutrecht |
language |
English |
description |
Deep-sea sponges create hotspots of biodiversity and biological activity in the otherwise barren deep-sea. However, it remains elusive how sponge hosts and their microbial symbionts acquire and process food in these food-limited environments. Therefore, we traced the processing (i.e. assimilation and respiration) of 13C- and 15N-enriched dissolved organic matter (DOM) and bacteria by three dominant North Atlantic deep-sea sponges: the high microbial abundance (HMA) demosponge Geodia barretti, the low microbial abundance (LMA) demosponge Hymedesmia paupertas, and the LMA hexactinellid Vazella pourtalesii. We also assessed the assimilation of both food sources into sponge- and bacteria-specific phospholipid-derived fatty acid (PLFA) biomarkers. All sponges were capable of assimilating DOM as well as bacteria. However, processing of the two food sources differed considerably between the tested species: the DOM assimilation-to-respiration efficiency was highest for the HMA sponge, yet uptake rates were 4–5 times lower compared to LMA sponges. In contrast, bacteria were assimilated most efficiently and at the highest rate by the hexactinellid compared to the demosponges. Our results indicate that phylogeny and functional traits (e.g., abundance of microbial symbionts, morphology) influence food preferences and diet composition of sponges, which further helps to understand their role as key ecosystem engineers of deep-sea habitats. |
author2 |
Geochemistry Bio-, hydro-, and environmental geochemistry |
format |
Article in Journal/Newspaper |
author |
Bart, Martijn C. de Kluijver, Anna Hoetjes, Sean Absalah, Samira Mueller, Benjamin Kenchington, Ellen Tore Rapp, Hans de Goeij, Jasper M. |
spellingShingle |
Bart, Martijn C. de Kluijver, Anna Hoetjes, Sean Absalah, Samira Mueller, Benjamin Kenchington, Ellen Tore Rapp, Hans de Goeij, Jasper M. Differential processing of dissolved and particulate organic matter by deep-sea sponges and their microbial symbionts. |
author_facet |
Bart, Martijn C. de Kluijver, Anna Hoetjes, Sean Absalah, Samira Mueller, Benjamin Kenchington, Ellen Tore Rapp, Hans de Goeij, Jasper M. |
author_sort |
Bart, Martijn C. |
title |
Differential processing of dissolved and particulate organic matter by deep-sea sponges and their microbial symbionts. |
title_short |
Differential processing of dissolved and particulate organic matter by deep-sea sponges and their microbial symbionts. |
title_full |
Differential processing of dissolved and particulate organic matter by deep-sea sponges and their microbial symbionts. |
title_fullStr |
Differential processing of dissolved and particulate organic matter by deep-sea sponges and their microbial symbionts. |
title_full_unstemmed |
Differential processing of dissolved and particulate organic matter by deep-sea sponges and their microbial symbionts. |
title_sort |
differential processing of dissolved and particulate organic matter by deep-sea sponges and their microbial symbionts. |
publishDate |
2020 |
url |
https://dspace.library.uu.nl/handle/1874/409308 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
2045-2322 https://dspace.library.uu.nl/handle/1874/409308 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1784276509822812160 |