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Castelnavia monandra 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Podostemales Podostemaceae

Scientific Name: Castelnavia monandra Tul. & Wedd.
Taxonomic Notes: A monograph of Castelnavia (Podostemaceae) (Philbrick et al. 2009) documents the known distribution of the species.

Assessment Information [top]

Red List Category & Criteria: Vulnerable D2 ver 3.1
Year Published: 2011
Date Assessed: 2008-05-06
Assessor(s): Philbrick, C.T. & Bove, C.P.
Reviewer(s): Hilton-Taylor, C. & Lutz, M.L.
Justification:
Castelnavia monandra grows only attached to rocks in the swift currents of the Araguaia River. Field studies conducted in 2005 and 2006 document the species only along an approximately 21 km of the river. Fearnside (1995) reports that a dam is planned for this region of the river. If a dam is constructed, the habitat for this species would be destroyed (inundated). It is therefore listed as Vulnerable.

Geographic Range [top]

Range Description:This species is only found in the Araguaia River (in a region reaching from 5°17’1.82” S, 48°57’0.0” W, upstream to 5°21’46.5” S, 48°45’8.05” W), between the states of Pará and Tocantins, Brazil. It is common; plants occur on many of the outcrops along this region of the river.
Countries occurrence:
Native:
Brazil (Pará, Tocantins)
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There is no information on the current population trend or size.
Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:Plants of all members of this flowering plant family (Podostemaceae) grow attached to rocks in swift river currents. Plants are vegetative when immersed by high water. Flowering occurs as water levels recede, and capsules mature on dry rocks. Subsequently seeds are dispersed. Seasonal water level fluctuations are central to the ecology of these plants. Philbrick and Novelo (2004) present a review of the published literature regarding the life cycle of these plants.
Systems:Freshwater

Use and Trade [top]

Use and Trade: None known.

Threats [top]

Major Threat(s): Construction of hydroelectric dams is the main threat to this species. Secondary threats are from sedimentation (construction, deforestation) and pollution (domestic, industrial).

Conservation Actions [top]

Conservation Actions: No conservation measures are currently in place.

Citation: Philbrick, C.T. & Bove, C.P. 2011. Castelnavia monandra. The IUCN Red List of Threatened Species 2011: e.T201660A9158797. . Downloaded on 21 September 2017.
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