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CEGL003017 Azolla (filiculoides, microphylla) Aquatic Vegetation
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: (Pacific Mosquito Fern, Mexican Mosquito Fern) Aquatic Vegetation
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: Habitat is low-elevation eutrophic ponds, lakes, and sloughs with little water movement. Species of Azolla occur throughout northwestern Oregon, but stands extensive enough to be considered occurrences of this association are most common in low-elevation areas in the Coast Range and Willamette Valley. They typically form nearly monotypic green or reddish mats that float on the surface of lakes and ponds, often growing so dense that no open water is visible. Azolla needs open water to proliferate in winter and spring, but it tolerates being stranded on mudflats when shallow pools dry out in summer. Mudflat sites are not uncommon, particularly on large floodplains, and in this habitat the Azolla mat develops a peculiar lumpy surface with varied microtopography. Elements of the Lemna minor association (Lemna, Spirodela, Ricciocarpos) may often be intermixed with Azolla but are always subordinate to Azolla. Eutrophic conditions favored by this association may be enhanced by enriched runoff in agricultural or urban landscapes.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: No Data Available
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: No Data Available
Dynamics: No Data Available
Environmental Description: No Data Available
Geographic Range: This association is found from Oregon to British Columbia (Christy 2004).
Nations: US
States/Provinces: CA, OR, WA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.688612
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G4
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 5 Aquatic Vegetation Class | C05 | 5 |
| Subclass | 5.B Freshwater Aquatic Vegetation Subclass | S13 | 5.B |
| Formation | 5.B.2 Temperate to Polar Freshwater Aquatic Vegetation Formation | F057 | 5.B.2 |
| Division | 5.B.2.Na North American Freshwater Aquatic Vegetation Division | D049 | 5.B.2.Na |
| Macrogroup | 5.B.2.Na.2 Rocky Mountain Pond-lily - Pacific Mosquito Fern - Western Waterweed Western North American Freshwater Aquatic Vegetation Macrogroup | M109 | 5.B.2.Na.2 |
| Group | 5.B.2.Na.2.a Pond-lily species - Pondweed species - Duckweed species Freshwater Aquatic Vegetation Group | G544 | 5.B.2.Na.2.a |
| Alliance | A1741 Pacific Mosquito Fern - Mexican Mosquito Fern Aquatic Vegetation Alliance | A1741 | 5.B.2.Na.2.a |
| Association | CEGL003017 (Pacific Mosquito Fern, Mexican Mosquito Fern) Aquatic Vegetation | CEGL003017 | 5.B.2.Na.2.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Azolla (filiculoides, mexicana) (Mosquito fern mats) Provisional Alliance (Sawyer et al. 2009) [52.106.00]
= Azolla (filiculoides, mexicana) Provisional Association (Buck-Diaz et al. 2012)
= Azolla (filiculoides, mexicana) (McCain and Christy 2005) [1 plot]
= Azolla (filiculoides, mexicana) Association (Christy 2004)
= Azolla (filiculoides, mexicana) Provisional Association (Buck-Diaz et al. 2012)
= Azolla (filiculoides, mexicana) (McCain and Christy 2005) [1 plot]
= Azolla (filiculoides, mexicana) Association (Christy 2004)
- Buck-Diaz, J., S. Batiuk, and J. M. Evens. 2012. Vegetation alliances and associations of the Great Valley ecoregion, California. California Native Society, Sacramento, CA. [http://cnps.org/cnps/vegetation/pdf/great_valley_eco-vegclass2012.pdf]
- Christy, J. A. 2004. Native freshwater wetland plant associations of northwestern Oregon. Oregon Natural Heritage Information Center, Oregon State University, Portland, OR.
- Kagan, J. S., E. M. Nielsen, M. D. Noone, J. C. van Warmerdam, L. K. Wise, G. Kittel, and C. Copass. 2012. Lewis and Clark National Historic Park vegetation classification and mapping project report. Natural Resource Report NPS/NCCN/NRR--2012/597. National Park Service, Fort Collins, CO.
- Kagan, J. S., J. A. Christy, M. P. Murray, and J. A. Titus. 2004. Classification of native vegetation of Oregon. January 2004. Oregon Natural Heritage Information Center, Portland. 52 pp.
- McCain, C., and J. A. Christy. 2005. Field guide to riparian plant communities in northwestern Oregon. Technical Paper R6-NR-ECOL-TP-01-05. USDA Forest Service, Pacific Northwest Region, Portland. 357 pp.
- Sawyer, J. O., T. Keeler-Wolf, and J. Evens. 2009. A manual of California vegetation. Second edition. California Native Plant Society, Sacramento CA. 1300 pp.
- Sawyer, J. O., and T. Keeler-Wolf. 1995. A manual of California vegetation. California Native Plant Society, Sacramento. 471 pp.
- Titus, J. H., and J. A. Christy. 1997. Willamette Valley riparian zones and wetlands. Unpublished report. Oregon Natural Heritage Program, The Nature Conservancy, Portland, OR.
- WNHP [Washington Natural Heritage Program]. 2018. Unpublished data files. Washington Natural Heritage Program, Department of Natural Resources, Olympia, WA.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.