Processing of Naturally Sourced Organic Matter (DOM) by High and Low Microbial Abundance

被引：14

作者：

Campana, Sara ^{[1
]}

Hudspith, Meggie ^{[1
]}

Lankes, David ^{[2
,3
]}

de Kluijver, Anna ^{[2
]}

Demey, Celine ^{[1
]}

Schoorl, Jorien ^{[1
]}

Absalah, Samira ^{[1
]}

van der Meer, Marcel T. J. ^{[4
]}

Mueller, Benjamin ^{[1
,5
]}

de Goeij, Jasper M. ^{[1
,5
]}

机构：

[1] Univ Amsterdam, Inst Biodivers & Ecosyst Dynam, Dept Freshwater & Marine Ecol, Amsterdam, Netherlands

[2] Univ Utrecht, Fac Geosci, Dept Earth Sci, Utrecht, Netherlands

[3] Motes Elizabeth Moore Int Ctr Coral Reef Res & Re, Summerland Key, FL USA

[4] NIOZ Royal Netherlands Inst Sea Res, Dept Marine Microbiol & Biogeochem, Texel, Netherlands

[5] CARMABI Fdn, Willemstad, Curacao

来源：

FRONTIERS IN MARINE SCIENCE | 2021年 / 8卷

基金：

欧洲研究理事会;

关键词：

dissolved organic matter (DOM); encrusting sponges; phospholipid fatty acids (PLFA); coral; macroalgae; coral reefs; nutrient cycling; coral-algae shifts;

D O I：

10.3389/fmars.2021.640583

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Sponges play a key role in (re)cycling of dissolved organic matter (DOM) and inorganic nutrients in coral reef ecosystems. Macroalgae and corals release different quantities of DOM and at different bioavailabilities to sponges and their microbiome. Given the current coral- to algal-dominance shift on coral reefs, we assessed the differential processing of macroalgal- and coral-DOM by three high and three low microbial abundance (HMA and LMA) encrusting sponge species. We followed the assimilation of naturally sourced 13C- and 15N-enriched macroalgal- and coral-DOM into bulk tissue and into hostversus bacteria-specific phospholipid fatty acids (PLFAs). Additionally, we compared sponge-processing of the two natural DOM sources with 13C- and 15N-enriched laboratory-made diatom-DOM. All investigated sponges utilized all DOM sources, with higher assimilation rates in LMA compared to HMA sponges. No difference was found in carbon assimilation of coral- versus macroalgal-DOM into bulk tissue and host- versus bacteria-specific PLFAs, but macroalgal nitrogen was assimilated into bulk tissue up to eight times faster compared to the other sources, indicating its higher bioavailability to the sponges. Additionally, LMA sponges released significantly more inorganic nitrogen after feeding on macroalgal-DOM. Therefore, we hypothesize that, depending on the abundance and composition of the sponge community, sponges could catalyze reef eutrophication through increased turnover of nitrogen under coral-to-algal regime shifts.

引用

页数：13

共 81 条

[1] Alexander B.E., Achlatis M., Osinga R., van der Geest H.G., Cleutjens J.P.M., Schutte B., Et al., Cell kinetics during regeneration in the sponge Halisarca caerulea: how local is the response to tissue damage?, PeerJ, 3, e820, (2015)
[2] Alexander B.E., Liebrand K., Osinga R., van der Geest H.G., Admiraal W., Cleutjens J.P.M., Et al., Cell turnover and detritus production in marine sponges from tropical and temperate benthic ecosystems, PLoS One, 9, e109486, (2014)
[3] Alexander B.E., Mueller B., Vermeij M.J.A., van der Geest H.G., de Goeij J.M., Biofouling of inlet pipes affects water quality in running seawater aquaria and compromises sponge cell proliferation, PeerJ, 3, e1430, (2015)
[4] Anderson M.J., Gorley R.N., Clarke K.R., PERMANOVA+ for PRIMER: Guide to Software and Statistical Methods, (2008)
[5] Atkinson M.J., Falter J., Biogeochemistry of coral reefs, Biogeochemistry of Marine Ecosystems, pp. 40-64, (2003)
[6] Azam F., Fenchel T., Field J.G., Gray J.S., Meyer-Reil L.A., Thingstad F., The ecological role of water-column microbes in the sea, Mar. Ecol. Prog. Ser, 10, pp. 257-263, (1983)
[7] Barott K.L., Rohwer F.L., Unseen players shape benthic competition on coral reefs, Trends Microbiol, 20, pp. 621-628, (2012)
[8] Bart M.C., de Kluijver A., Hoetjes S., Absalah S., Mueller B., Kenchington E., Et al., Differential processing of dissolved and particulate organic matter by deep-sea sponges and their microbial symbionts, Sci. Rep, 10, 17515, (2020)
[9] Bart M.C., Mueller B., Rombouts T., van de Ven C., Tompkins G.J., Osinga R., Et al., Dissolved organic carbon (DOC) is essential to balance the metabolic demands of four dominant North-Atlantic deep-sea sponges, Limnol. Oceanogr, 66, pp. 925-938, (2021)
[10] Cardenas A., Neave M.J., Haroon M.F., Pogoreutz C., Radecker N., Wild C., Et al., Excess labile carbon promotes the expression of virulence factors in coral reef bacterioplankton, ISME J, 12, pp. 59-76, (2018)

← 1 2 3 4 5 6 7 8 9 →