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Rotala floribunda 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Myrtales Lythraceae

Scientific Name: Rotala floribunda Koehne
Taxonomic Notes:

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2011
Date Assessed: 2011-04-05
Assessor(s): Watve, A.
Reviewer(s): Juffe Bignoli, D., Vasudevan, K., Kumar, V.S., Gunaga, S. & Narasimhan, D.
Contributor(s): Molur, S.
Justification:
The species is locally common, the largest subpopulation is found in one area only while it is rare elsewhere. Total number of locations is six although it has very small area of occupancy which was inferred calculating the area of suitable habitat. No immediate decline of the population has been reported, although population decline is expected in the future based on ongoing habitat degradation and loss of suitable habitat for the species. Thus this species is listed as Vulnerable as it occurs in a restricted range and ongoing threats that are impacting the species habitats.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Rotala floribunda is endemic to Maharashtra and is known from Ratnagiri, Satara and Kolhapur districts. The sites in Ratnagiri and Satara districts are between 800-1,200 m elevation. Those reported in Kolhapur district are at much lower elevations of about 600 m. It has also been recorded as rare from Mandangad in Ratnagiri District, which is at approx. 275 m asl. The species does not appear to be very specific about its microhabitat and is abundant in Mahabaleshwar especially around Lingmala and Pratapgad areas (Satara District). At Gothane (Ratnagiri District) it was recorded only once, but the locality is remote and not many surveys have been conducted there due to its inaccessibility. At localities in Kolhapur district it was also reported as rare along lake sides in Kagal and Kalamba. The same is true for Mandangad (Gaikwad et al. 2003).
Countries occurrence:
Native:
India (Maharashtra)
Additional data:
Estimated area of occupancy (AOO) - km2:2-3Continuing decline in area of occupancy (AOO):No
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:3000
Continuing decline in extent of occurrence (EOO):NoExtreme fluctuations in extent of occurrence (EOO):No
Number of Locations:6Continuing decline in number of locations:No
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):260
Upper elevation limit (metres):1100
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The species is reported as locally common in Mahabaleshwar area (Satara) but it is not common in any other locality. No population study has been conducted so far, but decline in the population has never been reported. The subpopulations in Mahabaleshar area are the largest, where it is distributed on rocks, cascades and cliff walls.
Current Population Trend:Unknown
Additional data:
Number of mature individuals:25000Continuing decline of mature individuals:Unknown
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:No
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:Rotala floribunda grows on steep sloping rocks and cliff faces on which water is trickling down in the Mahabaleshwar area which has the largest subpopulations. Secondarily, it also grows on vertical rocky areas especially road cuttings formed while road construction where water trickles down. At other localities, it is known to occur along lakes sides and tank edges and is rare.
Systems:Terrestrial; Freshwater
Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):1

Use and Trade [top]

Use and Trade: This species is not in commercial or local use.

Threats [top]

Major Threat(s): Tourism has been identified as a major threat in the area in the Western Ghats. It is frequent in Mahabaleshwar area which has the largest population. Changes in the microhabitat due to land-use change seems to be another possible threat to the species. The remaining subpopulations in other areas are probably affected by local grazing, trampling etc. (A. Watve pers. comm. 2010).

Conservation Actions [top]

Conservation Actions: Protecting the microhabitats of subpopulations in known localities is urgently required. Surveys to establish its distribution, impacts of threats are needed. The species' habitat and population need monitoring.

Citation: Watve, A. 2011. Rotala floribunda. The IUCN Red List of Threatened Species 2011: e.T175206A7122315. . Downloaded on 24 September 2018.
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