Overview

Distribution

Range Description

Mammillaria nivosa is distributed in the Bahamas, Puerto Rico (Mona, Desecho and Culebra Islands), US Virgin Islands (Buck Island, St. Thomas, Little St. James), British Virgin Islands (Tortola), Antigua, and the British and the West Indies (Hunt et al. 2006).
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
It has been reported from naked limestone rocks (Britton and Rose 1923).

Systems
  • Terrestrial
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2013

Assessor/s
Taylor, N.P.

Reviewer/s
Superina, M. & Goettsch, B.K.

Contributor/s

Justification
Mammillaria nivosa has a wide distribution and is known from various locations on different islands in the Caribbean. Its habitat quality is expected to be declining due to urban and tourism development. However, a subpopulation in the middle of its geographical range is within a protected area (Mona Island Natural Reserve) and was reported by Britton and Rose (1923) as extremely abundant. It is therefore listed as Least Concern.
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Population

Population
It has been reported in immense numbers on the island of the Mona passage (Britton and Rose 1923). Mona Island is a nature reserve and therefore the subpopulation there is thought to be intact. Habitat quality for subpopulations on other islands within its range are expected to be declining due to habitat loss from urban and tourism development.

Population Trend
Stable
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Threats

Major Threats
This species is affected by development of urban areas and tourism. Almost all of the islands where this species occurs are tourist resorts. However, this species also occurs on Mona Island, which is a protected nature reserve, and presumably not affected by development.
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Management

Conservation Actions

Conservation Actions
This cactus occurs on Mona Island, a protected nature reserve. No specific conservation measures are proposed.
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Wikipedia

Mammillaria nivosa

Mammillaria nivosa is a species of cactus also known by the name Woolly Nipple Cactus[1] and is native to the Caribbean.[2]

Description[edit]

Mammillaria nivosa is radially symmetrical and can grow up to 25 cm (9.8 in) tall.[3] It has spines that can grow to about 38 mm (1.5 in) and often overlap, probably to make it difficult for large organisms to reach the flesh of the cactus.[3]

The plant produces yellow flowers[4] that are approximately 15 mm (0.59 in) long.[3]

References[edit]

  1. ^ "Mammillaria nivosa Link ex N.E. Pfeiffer". PLANTS Profile. United States Department of Agriculture. Retrieved 18 April 2013. 
  2. ^ "Mammillaria nivosa". Integrated Taxonomic Information System. Retrieved 18 April 2013. 
  3. ^ a b c Curbelo-Rodríguez, Jean Carlos; Meléndez-Ackerman, Rojas-Sandoval, Segarra-Carmona (March 27, 2012). "New distribution record of Cybocephalus kathrynae (Coleoptera, Cybocephalidae) on Mona Island, Puerto Rico". Revista Brasileira de Entomologia 56 (1): 119–121. doi:10.1590/s0085-56262012005000004. Retrieved 26 April 2013. 
  4. ^ "Mammillaria nivosa". CactiGuide.com. Retrieved 18 April 2013. 


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