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Peltigera hydrothyria

Miadlikowska & Lutzoni

Eastern Waterfan Lichen

G4Apparently Secure (G4?) Found in 1 roadless area NatureServe Explorer →
G4Apparently SecureGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.902802
Element CodeNLVER01020
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryFungus
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomFungi
PhylumAscomycota
ClassLecanoromycetes
OrderPeltigerales
FamilyPeltigeraceae
GenusPeltigera
Synonyms
Peltigera hydrothyria var. hydrothyria
Other Common Names
hydrothyria lichen (EN) Peltigère évantail d'eau de l'Est (FR)
Concept Reference
Lendemer, J.C., and H. O'Brien. 2011. How do you reconcile molecular and non-molecular datasets? A case study where new molecular data prompts a revision of Peltigera hydrothyria s.l. in North America and the recognition of two species. Opuscula Philolichenum, 9: 99-110.
Taxonomic Comments
This record represents Peltigera hydrothyria in the narrow sense of Esslinger (2018) which is equivalent to Peltigera hydrothyria var. hydrothyria of McCune and Stone (2022). Lendemer and O'Brien (2011) split Peltigera hydrothyria (= Hydrothyria venosa). The name Peltigera hydrothyria was kept for eastern populations while western populations became Peltigera gowardii. Esslinger (2018) also treats P. gowardii as distinct.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2023-10-05
Change Date2023-10-05
Edition Date2023-10-05
Edition AuthorsTomaino, A. (2023)
Threat ImpactUnknown
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences21 - 80
Rank Reasons
Peltigera hydrothyria is an aquatic macrolichen known from eastern North America, from New Brunswick to Georgia. It is threatened by alterations to hydrology.
Range Extent Comments
Peltigera hydrothyria is known from eastern North America from New Brunswick to Georgia (Lendemer and O'Brien 2011, COSEWIC 2013, NatureServe 2023). Range extent was estimated using herbarium specimens and NatureServe Network occurrence data collected between 1992 and 2023 (GBIF 2023, NatureServe 2023).
Occurrences Comments
By applying a 1 km separation distance to herbarium records and NatureServe Network occurrence data documented between 1992 and 2023, it is estimated that there are between 21 and 80 occurrences rangewide (GBIF 2023, NatureServe 2023).
Threat Impact Comments
Threats to Peltigera hydrothyria include logging and alterations to hydrology (Lendemer and O'Brien 2011, NatureServe 2023). Specific short-term threats are natural gas extraction via hydraulic fracturing, disturbance from activities that cause stream siltation, alteration of microclimate, and declines in water quality (COSEWIC 2013). In the longer term, changes in weather patterns that alter water levels and flow are also a threat (Lendemer and O'Brien 2011, COSEWIC 2013).
Ecology & Habitat

Habitat

Peltigera hydrothyria grows on rocks at or below water level in cool, clear, partially-shaded streams and spring-fed seepages (Lendemer and O'Brien 2011, COSEWIC 2013, NatureServe 2023).
Palustrine Habitats
HERBACEOUS WETLANDRiparian
Other Nations (2)
CanadaN2
ProvinceRankNative
Nova ScotiaS1Yes
New BrunswickS2Yes
QuebecSNRYes
United StatesNNR
ProvinceRankNative
ConnecticutSNRYes
VermontSNRYes
PennsylvaniaSNRYes
TennesseeS1Yes
New HampshireSNRYes
New JerseySNRYes
West VirginiaS1Yes
GeorgiaSNRYes
VirginiaS1Yes
MaineSNRYes
New YorkSNRYes
North CarolinaS3Yes
Threat Assessments
ThreatScopeSeverityTiming
3 - Energy production & miningUnknownUnknownModerate (short-term)
3.1 - Oil & gas drillingUnknownUnknownModerate (short-term)
5 - Biological resource useUnknownUnknownUnknown
5.3 - Logging & wood harvestingUnknownUnknownUnknown
7 - Natural system modificationsUnknownUnknownUnknown
7.2 - Dams & water management/useUnknownUnknownUnknown
11 - Climate change & severe weatherUnknownUnknownHigh (continuing)

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Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (1)
Maine (1)
AreaForestAcres
Caribou - Speckled ExtWhite Mountain National Forest5,988
References (11)
  1. Amoroso, Jame. Personal communication. Botanist. North Carolina Heritage Program, NC Dept. of Environment, Health, & Natural Resources, Division of Parks And Recreation, Raleigh, NC.
  2. Committee on the Status of Endangered Wildlife in Canada (COSEWIC). 2013. COSEWIC Assessment Results November 2013. Accessed online at http://www.cosewic.ca/index.php/en-ca/assessment-process
  3. Esslinger, T. L. 2018. A cumulative checklist for the lichen-forming, lichenicolous and allied fungi of the continental United States and Canada, Version 22. Opuscula Philolichenum 17:6-268. [http://sweetgum.nybg.org/philolichenum/]
  4. Esslinger, T.L. and R.S. Egan. 1995. A sixth checklist of the lichen-forming, lichenicolous, and allied fungi of the continental United States and Canada. The Bryologist 98(4): 467-549.
  5. Fink, B. 1935. The Lichen Flora of the United States. The University of Michigan Press, Ann Arbor, Michigan. 473 pp.
  6. Global Biodiversity Information Facility (GBIF). 2023. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2023).
  7. Lendemer, J.C., and H. O'Brien. 2011. How do you reconcile molecular and non-molecular datasets? A case study where new molecular data prompts a revision of <i>Peltigera hydrothyria </i>s.l. in North America and the recognition of two species. Opuscula Philolichenum, 9: 99-110.
  8. McCune, B. and D.F. Stone. 2022. Eight new combinations of North American macrolichens. Evansia 39(3): 123-128.
  9. Miadlikowska, J. and F. Lutzoni. 2000. Phylogenetic revision of the genus <i>Peltigera</i> (lichen-forming Ascomycota) based on morphological, chemical, and large subunit nuclear ribosomal DNA data. International Journal of Plant Sciences 161(6):925-958.
  10. NatureServe. 2023. NatureServe Network Biodiversity Location Data. NatureServe, Arlington, Virginia.
  11. Southern Appalachian Species Viability Project. 2002. A partnership between the U.S. Forest Service-Region 8, Natural Heritage Programs in the Southeast, NatureServe, and independent scientists to develop and review data on 1300+ regionally and locally rare species in the Southern Appalachian and Alabama region. Database (Access 97) provided to the U.S. Forest Service by NatureServe, Durham, North Carolina.