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Isoetes ecuadoriensis 

Scope: Global
Language: English
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_onStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Isoetopsida Isoetales Isoetaceae

Scientific Name: Isoetes ecuadoriensis
Species Authority: Aspl.

Assessment Information [top]

Red List Category & Criteria: Vulnerable B2ab(iii) ver 3.1
Year Published: 2016
Date Assessed: 2014-10-07
Assessor(s): Terneus, E.
Reviewer(s): García, N.
Facilitator/Compiler(s): Cox, N.A.
Justification:
This species is endemic to the edges of Andean lakes/pond in the paramo grassland of Ecuador was first collected in 1920 in the Lagunas de Mojanda, and now known to be distributed near lakes in paramos throughout Ecuador. It has a relatively small area of occupancy (AOO), as it is only found in a few highland areas, it is threatened by general habitat loss, largely through desiccation of habitat and overgrazing by livestock, but possibly also through the impacts of the development of dams in the region. As such is it considered to be Vulnerable. Known to occur in the Reserva Ecológica Cotacachi-Cayapas and the Parque Nacional Podocarpus.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is endemic to Ecuador, where it has been recorded from the Provinces of Carchi, Chimborazo, Imbabura,  Loja, Napo and Zamora-Chinchipe. It was first collected in 1920 in the Lagunas de Mojanda, and now known to be distributed near lakes in paramos throughout Ecuador, between 3,350 and 4,200 m asl. It occurs at six to ten locations (defined by the main threats affecting the species) and its area of occupancy is estimated at 600-1,000 km² (calculated by overlaying 10x10 km grid cells over each location, a 10x10 km grid was used in this case as AOO would be significantly underestimated if a 2x2 km grid was used as some of the patches where the species occurs are significantly larger than 4 km² but only have one or two localities within each patch. To overcome this problem each patch was assumed to be 100 km² in area, and therefore a 10x10 km grid was used).
Countries occurrence:
Native:
Ecuador
Additional data:
Estimated area of occupancy (AOO) - km2:600-1000
Number of Locations:6-10
Lower elevation limit (metres):3350
Upper elevation limit (metres):4200
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:It appears to be a rare species, with little information available on the population trends.
Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:This fern grows on rocks and has been recorded from high altitude grassland (Páramo) at the edge of Andean lakes and temporary ponds (i.e., alpine wetlands, other swampy/boggy areas). Often in transitional areas with high-levels of organic matter, and high humidity. Like other species of the genus, it is confined to wetland areas on the edges of Andean lakes. The extent of its habitat is suffering continuing decline due to desiccation and overgrazing by livestock, but possibly also through the impacts of the development of dams in the region.
Systems:Freshwater
Continuing decline in area, extent and/or quality of habitat:Yes

Use and Trade [top]

Use and Trade: There does not appear to be any use or trade in this species.

Threats [top]

Major Threat(s): In general, the species is threatened by desiccation of habitat (it is very sensitive to climatic change) and overgrazing by cattle in some areas. It is also possibly impacted by the developments of dams in the region, altering the hydrological flows and microhabitat conditions.

Conservation Actions [top]

Conservation Actions: The species is known to occur in the Reserva Ecológica Cotacachi-Cayapas, the Parque Nacional Podocarpus, and possibly in the Parque Nacional Cayambe Coca. Research is needed to determine the impact of current threats on this species' population.

Citation: Terneus, E. 2016. Isoetes ecuadoriensis. The IUCN Red List of Threatened Species 2016: e.T43702A58983992. . Downloaded on 09 December 2016.
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