NatureServe Explorer logo.An Online Encyclopedia of Life
Search
 
Ecological System Comprehensive Report: Record 1 of 1 selected. View Glossary
<< Previous | Next >>

Classification
Scientific Name: North Pacific Hardpan Vernal Pool
Unique Identifier: CES204.859
Classification Confidence: 1 - Strong
Image 22098
© Chris Chappell
Summary: This system includes shallow ephemeral waterbodies found in depressions (up to several hectares in size) among grasslands and open woodlands throughout intermountain valleys of California, Oregon and the Gulf and San Juan islands of Washington and British Columbia. Northern hardpan vernal pools include an indurated clay or cemented (Si or Fe) hardpan that retains water inputs throughout some portion of the spring, but typically the depression dries down entirely into early summer months. In the Sand Juan and Gulf islands, they are created in small depressions in bedrock. This system typically occurs with a hummocky micro-relief. They tend to be acidic wetlands with characteristic plant species including Downingia elegans, Isoetes orcuttii, Pilularia americana, Triteleia hyacinthina, Eleocharis spp., Eryngium petiolatum, Plagiobothrys figuratus, Plagiobothrys scouleri, Grindelia nana, Veronica peregrina, Deschampsia danthonioides, and Callitriche spp. Due to draw-down characteristics, vernal pools typically form concentric rings of similar vegetation. Given their relative isolation in upland-dominated landscapes, many endemic and Federally-listed plant species are common in California vernal pools.

Classification Approach: International Terrestrial Ecological Systems Classification (ITESC)

Classification Comments: This system includes both duripan/hardpan and bedrock types, which are segregated in the California systems. Decided to lump them for this system because both occur intermixed in the geographic area defined.

Component Associations
Association Unique ID Association Name
CEGL003345 Eryngium petiolatum - Grindelia nana Vernal Pool
CEGL003346 Plagiobothrys figuratus Vernal Pool
CEGL003458 Eryngium petiolatum - Lasthenia glaberrima Vernal Pool
CEGL003459 Plagiobothrys scouleri - Plantago bigelovii Vernal Pool



Classifiers

Land Cover Class: Herbaceous Wetland
Spatial Pattern: Small patch
Natural/Seminatural: No
Vegetated ( > 10% vascular cover):
Upland: No
Wetland: Yes
Isolated Wetland: Strictly Isolated

Diagnostic Classifiers
Primary Classifier Secondary Classifier
Herbaceous  
Depressional Vernal Pool

Non-diagnostic Classifiers
Primary Classifier Secondary Classifier
Lowland Lowland
Temperate Temperate Oceanic
Isolated Wetland Strictly Isolated

At-Risk Species Reported for this Ecological System
Scientific Name
  (Common Name)
NatureServe Global Status U.S. Endangered Species Act Status
Ambystoma californiense
  (California Tiger Salamander)
G2G3 LE, LT: Listed endangered, listed threatened
Blennosperma bakeri
  (Baker's Blennosperma)
G1 LE: Listed endangered
Castilleja campestris ssp. succulenta
  (Fleshy Owl's-clover)
G4?T2T3 LT: Listed threatened
Chamaesyce hooveri
  (Hoover's Broomspurge)
G1 LT: Listed threatened
Downingia concolor var. concolor
  (Maroon-spot Downingia)
G4T3T4  
Downingia concolor var. tricolor
  (Maroon-spot Downingia)
G4T1?  
Eryngium spinosepalum
  (Spiny Sepaled Coyote-thistle)
G2  
Isoetes orcuttii
  (Orcutt's Quillwort)
G2?  
Juncus kelloggii
  (Kellogg's Rush)
G3?  
Mimulus angustatus
  (Narrowleaf Pansy Monkeyflower)
G3G4  
Navarretia leucocephala ssp. bakeri
  (Baker's Navarretia)
G4T2  
Navarretia myersii
  (Pincushion Navarretia)
G2  
Navarretia myersii ssp. myersii
  (Pincushion Navarretia)
G2T2  
Navarretia prostrata
  (Prostrate Navarretia)
G2  
Neostapfia colusana
  (Colusa Grass)
G1 LT: Listed threatened
Orcuttia inaequalis
  (San Joaquin Valley Orcutt Grass)
G1 LT: Listed threatened
Orcuttia pilosa
  (Hairy Orcutt Grass)
G1 LE: Listed endangered
Orcuttia tenuis
  (Slender Orcutt Grass)
G2 LT: Listed threatened
Plagiobothrys bracteatus var. aculeolatus
  (Bracted Popcorn-flower)
G4?T1T3Q  
Plagiobothrys chorisianus var. hickmanii
  (Hickman's Popcorn-flower)
G3T3Q  
Plagiobothrys figuratus ssp. corallicarpus
  (Coral-seeded Allocarya)
G4T1  
Plagiobothrys hirtus
  (Rough Popcorn-flower)
G1 LE: Listed endangered
Plagiobothrys humistratus
  (Dwarf Popcorn-flower)
G2G3  
Plagiobothrys strictus
  (Calistoga Popcorn-flower)
G1 LE: Listed endangered
Plagiobothrys trachycarpus
  (Rough-fruit Popcorn-flower)
G3G4  
Poa napensis
  (Napa Bluegrass)
G1 LE: Listed endangered
Pogogyne douglasii ssp. parviflora
  (Douglas' Pogogyne)
G4T3Q  
Polygonum polygaloides ssp. confertiflorum
  (Dense-flower Knotweed)
G4G5T3T4  
Psilocarphus brevissimus var. multiflorus
  (Delta Woolly Marbles)
G4T3  
Spergularia macrotheca var. leucantha
  (Beach Sandspurry)
G5T3T4  
Trifolium jokerstii
  (Butte County Golden Clover)
G2  

Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Char-
acter-
istic
Domi-nant Con-stant
Cover Class %
Con-
stancy
%
Downingia elegans G5 Flowering forb Herb (field)    
 
 
Eryngium petiolatum G4 Flowering forb Herb (field)    
 
 
Plagiobothrys figuratus ssp. corallicarpus T1 Flowering forb Herb (field)      
 
 
Plagiobothrys hirtus G1 Flowering forb Herb (field)      
 
 
Plagiobothrys scouleri G5 Flowering forb Herb (field)    
 
 
Polygonum polygaloides ssp. confertiflorum T3 Flowering forb Herb (field)    
 
 
Isoetes orcuttii G2 Fern (Spore-bearing forb) Herb (field)    
 
 
Deschampsia danthonioides G5 Graminoid Herb (field)    
 
 


Animal Species Reported for this Ecological System
Scientific Name
  (Common Name)
Global Status U.S. Endangered Species Act Status Charact-
eristic
Exotic
Ambystoma californiense
  (California Tiger Salamander)
G2G3 LE, LT: Listed endangered, listed threatened    
Lepidurus packardi
  (Vernal Pool Tadpole Shrimp)
G4 LE: Listed endangered    


Distribution
Color legend for Distribution Map
Nation: United States
United States Distribution: CA, OR, WA
Nation: Canada
Canadian Province Distribution: BC
Global Range: Found in depressions among grasslands and open woodlands throughout intermountain valleys of California, Oregon and the Gulf and San Juan islands of Washington.

Biogeographic Divisions
Division Code and Name Primary Occurrence Status
204-North American Pacific Maritime C: Confident or certain

The Nature Conservancy's Conservation Ecoregions
Code Name Occurrence Status
2 Puget Trough - Willamette Valley - Georgia Basin Confident or certain

MRLC 2000 Mapzones
Code Name Occurrence Status
1 Northern Cascades Confident or certain
2 Oregon Coastal Range Confident or certain
7 Cascade Mountain Range Confident or certain

National Mapping
ESLF Code (Ecological System Lifeform): 9225

West Landfire Legend: No
East Landfire Legend: No

Authors/Contributors
Element Description Edition Date: 14Jan2014
Element Description Author(s): C. Chappell and G. Kittel

Ecological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).


References
  • Barbour, M. G. 1998. Forward. In: C. W. Witham, editor. Ecology, conservation and management of vernal pool ecosystems. Proceedings from a 1996 Conference, California Native Plant Society, Sacramento.

  • Barbour, M. G., A. I. Solomeshch, R. F. Holland, C.W. Witham, R. L. Macdonald, S. S. Cilliers, J. A. Molina, J. J. Buck, and J. M. Hillman. 2005. Vernal pool vegetation of California: Communities of long-inundated deep habitats. Phytocoenologia 35:177-200.

  • Barbour, M. G., A. Solomeshch, C. Witham, R. Holland, R. Macdonald, S. Cilliers, J. A. Molina, J. Buck, and J. Hillman. 2003. Vernal pool vegetation of California: Variation within pools. Madroņo 50:129-146.

  • Brown, W. 1999. Evaluation of cattle grazing effects on floristic composition in eastern Washington vernal pools. M.S. thesis, University of Washington, Seattle.

  • Calderaro, A. 2011. Physical and chemical factors that affect diversity of aquatic invertebrates in vernal pools in Sacramento County, California. M.S. thesis, California State University, Sacramento. [http://hdl.handle.net/10211.9/1474]

  • Chappell, C., and J. Christy. 2004. Willamette Valley-Puget Trough-Georgia Basin Ecoregion Terrestrial Ecological System EO Specs and EO Rank Specs. Appendix 11 in: J. Floberg, M. Goering, G. Wilhere, C. MacDonald, C. Chappell, C. Rumsey, Z. Ferdana, A. Holt, P. Skidmore, T. Horsman, E. Alverson, C. Tanner, M. Bryer, P. Lachetti, A. Harcombe, B. McDonald, T. Cook, M. Summers, and D. Rolph. Willamette Valley-Puget Trough-Georgia Basin Ecoregional Assessment, Volume One: Report prepared by The Nature Conservancy with support from The Nature Conservancy of Canada, Washington Department of Fish and Wildlife, Washington Department of Natural Resources (Natural Heritage and Nearshore Habitat programs), Oregon State Natural Heritage Information Center and the British Columbia Conservation Data Centre.

  • Comer, P., D. Faber-Langendoen, R. Evans, S. Gawler, C. Josse, G. Kittel, S. Menard, C. Nordman, M. Pyne, M. Reid, M. Russo, K. Schulz, K. Snow, J. Teague, and R. White. 2003-present. Ecological systems of the United States: A working classification of U.S. terrestrial systems. NatureServe, Arlington, VA.

  • Dalton, M. M., P. W. Mote, and A. K. Snover, editors. 2013. Climate change in the Northwest: Implications for our landscapes, waters, and communities. Island Press, Washington, DC.

  • Hanes, T., and L. Stromberg. 1998. Hydrology of vernal pools on non-volcanic soils in the Sacramento Valley. In: C. W. Witham, editor. Ecology, conservation and management of vernal pool ecosystems. Proceedings from a 1996 Conference, California Native Plant Society, Sacramento.

  • Holland, R. 1998. Changes in Great Valley vernal distribution from 1989 to 1997. Report prepared for California Department of Fish and Game, Sacramento. 18 pp. [https://dfgsecure.dfg.ca.gov/biogeodata/wetlands/pdfs/Holland_ChangesInGreatValleyVernalPoolDistribution.pdf]

  • Holland, R. 2009. California's Great Valley vernal pool habitat status and loss: Rephotorevised 2005. Report prepared for Placer Land Trust, Auburn, CA. 23 pp.

  • Holland, V. L., and D. J. Keil. 1995. California vegetation. Kendall/Hunt Publishing Company, Dubuque, IA. 516 pp.

  • Keeley, J. E., and P. H. Zedler. 1998a. Evolution of life histories in Pinus. Pages 219-250 in: D. M. Richardson, editor. Ecology and biogeography of Pinus. The Press Syndicate of the University of Cambridge, Cambridge, UK.

  • Marty, J. T. 2005. Effect of cattle grazing on diversity in ephemeral wetlands. Conservation Biology 19:1626-1632.

  • PRBO Conservation Science. 2011. Projected effects of climate change in California: Ecoregional summaries emphasizing consequences for wildlife. Version 1.0. PRBO Conservation Science, Petaluma, CA. [http://data.prbo.org/apps/bssc/climatechange]

  • Pollak, O., and T. Kan. 1998. The use of prescribed fire to control invasive exotic weeds at Jepson Prairie Preserve. In: C. W. Witham, editor. Ecology, conservation and management of vernal pool ecosystems. Proceedings from a 1996 Conference, California Native Plant Society, Sacramento.

  • Robins, J. D., and J. E. Vollmar. 2002. Chapter 11: Livestock grazing and vernal pools. Pages 401-430 in: Wildlife and rare plant ecology of eastern Merced County's vernal pool grasslands. Vollmar Consulting, Berkeley, CA. [www.ucmercedplanning.net/pdfs/eco/ecoch11.pdf]

  • Rocchio, Joe. Personal communication. Ecologist. Washington Natural Heritage Program, Department of Natural Resources, Olympia, WA.

  • Solomeshch, A., M. G. Barbour, and R. F. Holland. 2007. Chapter 15: Vernal pools. In: M. G. Barbour, T. Keeler-Wolf, and A. A. Schoenherr, editors. Terrestrial vegetation of California, third edition. University of California Press.

  • WNHP [Washington Natural Heritage Program]. 2018. Unpublished data files. Washington Natural Heritage Program, Department of Natural Resources, Olympia, WA.

  • Wills, R. 2006. Central Valley bioregion. Pages 295-320 in: N. G. Sugihara, J. W. van Wagtendonk, K. E. Shaffer, J. Fites-Kaufman, and A. E. Thode, editors. Fire in California's ecosystems. University of California Press, Berkeley.


Use Guidelines and Citation

The Small Print: Trademark, Copyright, Citation Guidelines, Restrictions on Use, and Information Disclaimer.

Note: All species and ecological community data presented in NatureServe Explorer at http://explorer.natureserve.org were updated to be current with NatureServe's central databases as of March 2019.
Note: This report was printed on

Trademark Notice: "NatureServe", NatureServe Explorer, The NatureServe logo, and all other names of NatureServe programs referenced herein are trademarks of NatureServe. Any other product or company names mentioned herein are the trademarks of their respective owners.

Copyright Notice: Copyright © 2019 NatureServe, 2511 Richmond (Jefferson Davis) Highway, Suite 930, Arlington, VA 22202, U.S.A. All Rights Reserved. Each document delivered from this server or web site may contain other proprietary notices and copyright information relating to that document. The following citation should be used in any published materials which reference the web site.

Citation for data on website including State Distribution, Watershed, and Reptile Range maps:
NatureServe. 2019. NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available http://explorer.natureserve.org. (Accessed:

Citation for Bird Range Maps of North America:
Ridgely, R.S., T.F. Allnutt, T. Brooks, D.K. McNicol, D.W. Mehlman, B.E. Young, and J.R. Zook. 2003. Digital Distribution Maps of the Birds of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

Acknowledgement Statement for Bird Range Maps of North America:
"Data provided by NatureServe in collaboration with Robert Ridgely, James Zook, The Nature Conservancy - Migratory Bird Program, Conservation International - CABS, World Wildlife Fund - US, and Environment Canada - WILDSPACE."

Citation for Mammal Range Maps of North America:
Patterson, B.D., G. Ceballos, W. Sechrest, M.F. Tognelli, T. Brooks, L. Luna, P. Ortega, I. Salazar, and B.E. Young. 2003. Digital Distribution Maps of the Mammals of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

Acknowledgement Statement for Mammal Range Maps of North America:
"Data provided by NatureServe in collaboration with Bruce Patterson, Wes Sechrest, Marcelo Tognelli, Gerardo Ceballos, The Nature Conservancy-Migratory Bird Program, Conservation International-CABS, World Wildlife Fund-US, and Environment Canada-WILDSPACE."

Citation for Amphibian Range Maps of the Western Hemisphere:
IUCN, Conservation International, and NatureServe. 2004. Global Amphibian Assessment. IUCN, Conservation International, and NatureServe, Washington, DC and Arlington, Virginia, USA.

Acknowledgement Statement for Amphibian Range Maps of the Western Hemisphere:
"Data developed as part of the Global Amphibian Assessment and provided by IUCN-World Conservation Union, Conservation International and NatureServe."

NOTE: Full metadata for the Bird Range Maps of North America is available at:
http://www.natureserve.org/library/birdDistributionmapsmetadatav1.pdf.

Full metadata for the Mammal Range Maps of North America is available at:
http://www.natureserve.org/library/mammalsDistributionmetadatav1.pdf.

Restrictions on Use: Permission to use, copy and distribute documents delivered from this server is hereby granted under the following conditions:
  1. The above copyright notice must appear in all copies;
  2. Any use of the documents available from this server must be for informational purposes only and in no instance for commercial purposes;
  3. Some data may be downloaded to files and altered in format for analytical purposes, however the data should still be referenced using the citation above;
  4. No graphics available from this server can be used, copied or distributed separate from the accompanying text. Any rights not expressly granted herein are reserved by NatureServe. Nothing contained herein shall be construed as conferring by implication, estoppel, or otherwise any license or right under any trademark of NatureServe. No trademark owned by NatureServe may be used in advertising or promotion pertaining to the distribution of documents delivered from this server without specific advance permission from NatureServe. Except as expressly provided above, nothing contained herein shall be construed as conferring any license or right under any NatureServe copyright.
Information Warranty Disclaimer: All documents and related graphics provided by this server and any other documents which are referenced by or linked to this server are provided "as is" without warranty as to the currentness, completeness, or accuracy of any specific data. NatureServe hereby disclaims all warranties and conditions with regard to any documents provided by this server or any other documents which are referenced by or linked to this server, including but not limited to all implied warranties and conditions of merchantibility, fitness for a particular purpose, and non-infringement. NatureServe makes no representations about the suitability of the information delivered from this server or any other documents that are referenced to or linked to this server. In no event shall NatureServe be liable for any special, indirect, incidental, consequential damages, or for damages of any kind arising out of or in connection with the use or performance of information contained in any documents provided by this server or in any other documents which are referenced by or linked to this server, under any theory of liability used. NatureServe may update or make changes to the documents provided by this server at any time without notice; however, NatureServe makes no commitment to update the information contained herein. Since the data in the central databases are continually being updated, it is advisable to refresh data retrieved at least once a year after its receipt. The data provided is for planning, assessment, and informational purposes. Site specific projects or activities should be reviewed for potential environmental impacts with appropriate regulatory agencies. If ground-disturbing activities are proposed on a site, the appropriate state natural heritage program(s) or conservation data center can be contacted for a site-specific review of the project area (see Visit Local Programs).

Feedback Request: NatureServe encourages users to let us know of any errors or significant omissions that you find in the data through (see Contact Us). Your comments will be very valuable in improving the overall quality of our databases for the benefit of all users.

Copyright 2019
NatureServe
Version 7.1 (2 February 2009)
Data last updated: March 2019