hypersaline water

ENVO:00002012 ·resolve ·AQUATIC ·EXACT SEEDED

Water which contains a highly increased concentration of dissolved salts, surpassing the average salinity of seawater. — ENVO

SEEDED workflow status. The source-seeding rules supplied this record; consult its curation history for later attributed changes. This status does not establish human review.

Source attestations

Each upstream vocabulary's own account of this habitat. Assertion counts are per-source units and are not comparable across sources — GOLD counts organisms, BacDive strains, PREGO taxa.

What each upstream vocabulary says about this habitat
Source	Label / path	Assertions	Unit
ENVIRONMENTS_TABLE	water_hypersaline Physicochemical parameter bands from kg-microbe's environment table.	—
MADIN	hypersaline water	416	TAXON
PREGO	hypersaline water	14	TAXON

Broader habitats

saline water ENVO:00002010

Environmental parameters

Physicochemical parameters
Parameter	Value	Source
GRADIENTS	low	kg-microbe environments.csv (water_hypersaline)
ORGANIC_MATTER	low	kg-microbe environments.csv (water_hypersaline)
SALINITY	high	kg-microbe environments.csv (water_hypersaline)
SALINITY_VARIABILITY	small	kg-microbe environments.csv (water_hypersaline)
STRUCTURAL_COMPLEXITY	low	kg-microbe environments.csv (water_hypersaline)
TEMPERATURE_VARIABILITY	medium	kg-microbe environments.csv (water_hypersaline)
WATER_AVAILABILITY	low	kg-microbe environments.csv (water_hypersaline)
WATER_VARIABILITY	permanently wet	kg-microbe environments.csv (water_hypersaline)

Causal graphs

Hypersaline osmoadaptation

High external salinity lowers water activity and selects for osmotic balancing strategies in halophilic microorganisms.

Directed graph · arrows run from subject to object. Focus or hover over a node or arrow for details; the evidence table follows.

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hypersaline_osmoadaptation edges
Edge	Subject	Predicate	Object	Evidence
`salinity_reduces_water_activity`	high salinity	promotes High salt in hypersaline water makes low water activity the core osmotic constraint experienced by resident microbes.	low water activity	`PMID:29529204` Gunde-Cimerman et al. review osmotic adaptation to hypersaline environments across Archaea, Bacteria, and Eukarya.
`low_water_activity_selects_salt_in`	low water activity	selects for One osmotic-balancing route is the salt-in strategy, in which halophiles accumulate intracellular potassium chloride.	potassium chloride accumulation	`PMID:29529204` The review identifies salt accumulation as an osmoadaptation strategy used by many halophilic Archaea and some Bacteria.
`salt_in_requires_salt_adapted_machinery`	potassium chloride accumulation	requires Cells using molar intracellular salt require proteins that remain properly folded and active under those ionic conditions.	salt-adapted intracellular machinery	`PMID:18412960` This excerpt supports protein function at high salt. The review's separate acidity generalization is qualified by the primary counterevidence below. `PMID:22527048` Primary analysis of three Halanaerobiales genomes did not confirm the predicted acidic proteomes despite the group's salt-in strategy. This counters a universal acidity requirement, not the need for intracellular machinery compatible with high salt.
`low_water_activity_selects_compatible_solutes`	low water activity	selects for A second osmotic-balancing route is accumulation or synthesis of organic compatible solutes.	compatible solute accumulation	`PMID:29529204` The review contrasts organic compatible-solute accumulation with the salt-in strategy.

Associated taxa

Taxa reported from this habitat, which is weaker than being characteristic of it. rank is out of pool: a high rank in a pool of thousands of near-tied scores is a weak claim. Entries corroborated by a second, independent source are listed first.

Taxa reported from this habitat
Taxon	Source	Rank	Pool	Corroborated
Halovibrio variabilis `NCBITaxon:31910`	PREGO	5	14	MADIN
Haloplanus natans DSM 17983 `NCBITaxon:926690`	PREGO	1	14
Alloalcanivorax venustensis `NCBITaxon:172371`	PREGO	2	14
uncultured Methylophaga sp. `NCBITaxon:285271`	PREGO	3	14
Alcanivorax sp. EPR7 `NCBITaxon:1334019`	PREGO	4	14
Vreelandella sulfidaeris `NCBITaxon:115553`	PREGO	6	14
Halomonas sp. HAL1 `NCBITaxon:550984`	PREGO	7	14
Pseudomonas oryzihabitans `NCBITaxon:47885`	PREGO	8	14
`NCBITaxon:230105`	PREGO	9	14
Alloalcanivorax dieselolei `NCBITaxon:285091`	PREGO	10	14
`NCBITaxon:158080`	PREGO	11	14
Chromohalobacter sp. HS-2 `NCBITaxon:1188994`	PREGO	12	14
Halomonas sp. HTNK1 `NCBITaxon:645472`	PREGO	13	14
`NCBITaxon:48547`	PREGO	14	14
gracilibacillus_kekensis `NCBITaxon:1027249`	MADIN	—	416
Salinisphaera shabanensis E1L3A `NCBITaxon:1033802`	MADIN	—	416
Halorhabdus tiamatea SARL4B `NCBITaxon:1033806`	MADIN	—	416
Haloplasma contractile SSD-17B `NCBITaxon:1033810`	MADIN	—	416
legionella_tunisiensis `NCBITaxon:1034944`	MADIN	—	416
Idiomarina sp. A28L `NCBITaxon:1036674`	MADIN	—	416
Fusibacter sp. 3D3 `NCBITaxon:1048380`	MADIN	—	416
Halopenitus persicus `NCBITaxon:1048396`	MADIN	—	416
amycolatopsis_halophila `NCBITaxon:1069073`	MADIN	—	416
Bacillus sp. NSP9.1 `NCBITaxon:1071078`	MADIN	—	416
Bacillus sp. SB47 `NCBITaxon:1071079`	MADIN	—	416

Showing 25 of 38 kept associations.

Also called

hypersaline waters — PREGO

Curation

What a curator decided about this record, and why. A record built from several source concepts can carry one decision per concept.

ADD_CAUSAL_GRAPH 2026-09-04 · codex
Added a hypersaline-water osmoadaptation graph backed by PMID:18412960 and PMID:29529204.
CORRECT_CAUSAL_GRAPH 2026-10-03 · codex
Corrected low-water-activity edge polarity and replaced the universal acidic-proteome dependency with salt-adapted intracellular machinery. Retained scoped Halanaerobiales counterevidence from PMID:22527048 (#1243).

Provenance

Generated by scripts/seed_from_sources.py from the committed inventories in data/raw/. View the record.