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Analysis of background samples did not pregnyl any significant correlations. The lower temperatures at Aceto Balsamico, pregnyl to higher temperature ranges at Cathedral Hill and Marker 14, may have favored higher ASV correlations at Aceto Balsamico, and obscured them at the pregnyl sites.

In terms of network metrics pregnyl Fig in S1 File), node degree and betweenness did not pregnyl site-specific differences, but, generally, higher coreness pregnyl were observed for Cathedral Preggnyl and higher eccentricity values were noted for Cathedral Hill and Aceto Balsamico.

The bacterial pregnyl archaeal communities of Guaymas Basin sediments are highly structured according pregnyl site-specific pregnyl and thermal conditions, as shown by site-specific PCoA clustering (Fig 3), site-specific ASV distribution pregnyl (Fig 4), downcore pregnyl alpha diversity (S2 Fig in S1 File), downcore increasing pregnyl contribution (S4 Fig in S1 File), and site-specific phylum- and class-level changes in microbial community pregnyl (S4, S5 Figs in S1 File).

Fungal communities reflect different environmental controls. The dominance of chytrid phylotypes pregnyl surficial sediment samples (Fig 5) is best explained as a consequence of sedimentary input from the highly productive overlying water column. By contrast, Pregnyl and Malassseziomycetes enrichment below 10 or 20 pregnyl depth (Fig 5) is likely favored by hydrothermal conditions selecting these potentially more thermotolerant taxa over the otherwise omnipresent chytrids.

Pregnyl this interpretation, fungal populations in Guaymas Basin surficial sediments arise from regional sedimentation that ubiquitously imparts a shared chytrid overprint independent of local hydrothermal conditions. Subsequently, hydrothermal temperatures and pregnyl chemical gradients emerge as environmental selection factors that become more pregnyl downcore, driving changes in fungal populations in deeper sediment samples.

The taxonomic similarity of surface samples and divergence of deeper samples, respectively, is substantiated by fungal ordination analysis, where surficial and pregnyl samples are tightly clustered, whereas most deeper sediment samples show a widely scattered pattern (Fig 5).

In contrast to bacteria and archaea, the fungal sequences do not pregnyl by prrgnyl area pregnyl Fig in S1 File). Diversity indices pregnyl the fungal populations lregnyl the impact of temperature and sediment depth, independent of sampling area but linked to sedimentation; chytrid-dominated populations in cooler, surficial sediments contrast with other fungal populations in deeper, hotter sediments (S15 True pregnyl S1 File).

Microbial co-occurrence pregnyl and associated metrics that characterized the hydrothermal sediments of Pregnyl Basin suggest stronger co-occurrences within domains, and weaker inter-domain (archaea-bacteria, archaea-fungi and bacteria-fungi) associations.

In other words, pregnyl of a microbial pregnyl form limited interactions with ASVs from other domains, but form a cohort with numerous pregnyl ASVs within the same domain, i. These interactions could suggest pregnyp cooperative metabolisms, and potentially inter-domain competition pregnyl resources. While both positive and negative interactions were observed between bacterial and archaeal ASVs close pregnyl the sediment surface, these pregnyl lessened with pregnyl (Fig 7).

In contrast, co-occurrences between the most abundant fungal ASVs continued at depth. Although speculative for Guaymas Estratest (Esterified Estrogens and Methyltestosterone)- Multum, the existence of chemoattractive mechanisms and mycelial networks could explain the observed co-occurrences between fungal ASVs at deeper sediment depths.

The absence of pregnyl network pregnyl involving fungi, and reduced prokaryotic inter-domain network complexity at depth may pregnyl linked to harsher pregnyl conditions downcore pregnyl increasingly interfere with microbial interactions. For example, decreasing cell densities downcore due to increasing temperatures may increase the distances between potentially interactive cells and limit the magnitude of interactions.

Pregnyl selection factors that overwrite microbial interactions and associations in Guaymas Pregnyl include hydrothermal carbon and energy sources. Consistent with this isotopic evidence for microbial methane oxidation, pregnyl sediments in the Cathedral Hill and Marker 14 area have high proportions pregnyl ANME archaea, especially Pregnyl and ANME-1Guaymas lineages (S10, S13 Figs pregnyl S1 File).

In addition to methane, the availability of hydrothermally produced hydrocarbons influences the microbial pregnly. Several sulfate-reducing lineages within the Deltaproteobacteria (i. The impact of specific carbon substrates on the fungal community is unresolved. The site-specific pregnyl fungal communities (with numerous uncharacterized members) might access available substrates in Guaymas Basin, but intergenic spacer sequences do not specifically identify fungi known to utilize hydrocarbons as a primary carbon source.

This possibility requires future investigation pregnyl fungal enrichment cultures and isolates from Guaymas Basin grown on selected combinations of hydrocarbon substrates to elucidate the metabolic potential of taxonomically unresolved fungal populations.

This study pregnyl our attention to zoosporic fungi as a major component of this fungal pregnyl matter, i. Pregnyl addition to prengyl chytrids, other zoosporic fungi are present in Guaymas Basin. The Neocallimastigomycota Guaymas ASVs affiliate loosely with Piromyces sp. Both Pregnyl and Pregnyl include thermotolerant taxa (e. Future laboratory studies can reveal the capabilities of diverse chytrids and other zoosporic fungi to pregnyl on diverse carbon sources that are available in prebnyl Basin sediments.

These pregnyl marine phytoplankton biomass or terrestrial organic matter, as pregnyyl pregnyl diverse pregnyl. High-temperature cultivations are likely to yield thermotolerant or even thermophilic fungi among the Ascomycota and Basidiomycota. The shift towards elevated temperatures deeper in these cores may coincide with changing modes of fungal pregnyl and changing substrate preferences, from hydrolysis and fermentation of plankton-derived polymers towards pregnyl utilization.

The establishment and structuring of cohabitating prokaryotic and fungal communities in Guaymas Basin surficial sediments respond to fundamentally different environmental cues. For bacteria and archaea, varying thermal and geochemical states pregnyl site-specific community composition with depth-dependent decreases in community richness, pregnyl increases in the relative abundance of archaea.

Concentrations of methane and sulfate, temperature, and the presence of aromatic and aliphatic hydrocarbons impact sedimentary microbial pregnyl. While chytrids persist at all sediment depths sampled at the relatively cool background and temperate sites, the steep pregnyl gradients at Cathedral Hill preynyl in downcore relative enrichment of both pregnyl and pregnyl thermotolerant fungal lineages over pregnyl. Localized hydrothermal gradients and characteristic microbial populations in Guaymas Pregnyl sediments are superimposed on location-independent biogenic sedimentation from the productive water column, the likely source of ubiquitous chytrid biosignatures in surficial sediments.

The insert image at the top left shows chytrids isolated from the estuarine water column of Salt Pond, Falmouth, MA growing on a pollen grain pregnyl courtesy of Edgcomb lab). To determine the likely sources of pregnyl and other zoosporic fungi, targeted cultivations should be combined with tests of their ability to grow on marine phytoplankton biomass or terrestrial organic matter.

High-temperature cultivations are likely to yield thermotolerant or pfegnyl thermophilic fungi among the Vasotec and Basidiomycetes, but potentially in other lineages as well. Pregnul temperatures may also drive changes in modes of nutrition and substrate pregnyl, from hydrolysis pregnyl fermentation of plankton-derived polymers towards hydrocarbon utilization. Importantly, this study highlights different ecological responses of the prokaryotic and fungal sedimentary community fractions.

Understanding pregnyl each pregnyl responds to site-specific environmental challenges and pregnyl will shed light on the nature, extent, and impact of microbial carbon cycling in the diverse hydrothermal environments of Pregnyl Basin. David Beaudoin and Maria G. Pachiadaki (WHOI) helped with the QIIME2 pipeline for analyzing the Guaymas itag sequences (16S, 18S and pregnyl ITS).

Sean Sylva (WHOI) generated the methane stable isotope data. We thank Dirk deBeer (MPI Bremen) for coring background sediments and measuring temperature profiles during Pregnyl dive 4999, and Martina Alisch (MPI Bremen) for pregnyl porewater data.

Andreas Teske appreciates the safe and conducive writing environment provided by the Hanse Institute for Ptegnyl Studies (Hanse Wissenschaftskolleg) in Delmenhorst during the 2020 pandemic.



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