Host specificity and low reproductive success in the rare endemic Puerto Rican orchid Lepanthes caritensis

Tremblay, Raymond L.; Zimmerman, Jess K.; Lebrón, Ligia; Bayman, Paul; Sastre, Inés; Axelrod, Franklin S.; Alers-García, Janice

doi:10.1016/s0006-3207(97)00163-8

Cited by 84 publications

(95 citation statements)

References 29 publications

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“…In Carite, the survey confirmed the reports of Tremblay et al (1998) suggesting that Lepanthes caritensis is found solely on trunks of Micropholis guyanensis at that site. Each of the 7 documented subpopulations in Carite was located on this tree species.…”

Section: We Documented 7 Trees Hostingsupporting

confidence: 85%

Update on the distribution of Lepanthes caritensis, a rare Puerto Rican endemic orchid

Crain¹,

Tremblay²

2012

Endang. Species. Res.

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Lepanthes caritensis is a small epiphytic orchid endemic to Puerto Rico. Although this species is very rare and demographic studies show that its numbers are declining, it is not protected under the United States Federal Endangered Species Act (ESA). Furthermore, questions remain regarding its distribution, population size and ecological interactions, including hostspecificity, which could influence its likelihood of extinction. The primary objective of this study was to document the overall population size and distribution of this orchid to determine whether it warrants federal listing. To this end, extensive surveys were conducted to document the current distribution and population size of L. caritensis. These data were used to classify the species' rarity status according to criteria outlined by Rabinowitz, NatureServe and the IUCN. Results of these surveys indicate that the overall population of L. caritensis is larger and more widely distributed than previously thought. In addition, the species is not host-specific outside its originally described range, and is found on at least 4 different host species. Nevertheless, this species is indeed rare: it meets the criteria for the NatureServe category 'critically imperiled' and the IUCN category 'Critically Endangered'. Consequently, the most important conclusion of this study is that this species warrants legal protection under the ESA, particularly if its population continues to decline.

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Section: We Documented 7 Trees Hostingsupporting

confidence: 85%

Update on the distribution of Lepanthes caritensis, a rare Puerto Rican endemic orchid

Crain¹,

Tremblay²

2012

Endang. Species. Res.

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“…While CAM is particularly common among epiphytic orchids, local rarity is also a frequent feature of many members of this family (e.g. Tremblay et al 1998;Flores-Palacios and Garcia 2001). Secondly, plant biomass may also differ by many orders of magnitude•^take, e.g., tiny twig orchids versus massive aroids or large tank bromeliads (Hietz and Hietz-Seifert 1995).…”

Section: Introductionmentioning

confidence: 99%

How prevalent is crassulacean acid metabolism among vascular epiphytes?

Zotz

2004

Oecologia

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The occurrence of crassulacean acid metabolism (CAM) in the epiphyte community of a lowland forest of the Atlantic slope of Panama was investigated. I hypothesized that CAM is mostly found in orchids, of which many species are relatively small and/or rare. Thus, the relative proportion of species with CAM should not be a good indicator for the prevalence of this photosynthetic pathway in a community when expressed on an individual or a biomass basis. In 0.4 ha of forest, 103 species of vascular epiphytes with 13,099 individuals were found. As judged from the C isotope ratios and the absence of Kranz anatomy, CAM was detected in 20 species (19.4% of the total), which were members of the families Orchidaceae, Bromeliaceae, and Cactaceae. As predicted, the contribution of CAM epiphytes to the total number of individuals and to total biomass (69.6 kg ha"') was considerably lower (3.6% or 466 individuals and, respectively, 3.0% or 2.1 kg ha"').

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“…Como consequência, diversos autores trabalharam apenas com um ou alguns grupos taxonômicos, como Orchidaceae (Catling et al 1986;Tremblay 1997;Nunes & Waechter 1998;Tremblay et al 1998/Zotz 1998, Bromeliaceae (Fontoura 1995;Zotz & Andrade 1998;Mondragón et al 1999), Araceae (Mantovani 1999), Cactaceae (Andrade & Nobel 1997), e pteridófitas (Madison 1979;Zapfack et al 1996;Hooper & Haufler 1997;Senna & Waechter 1997;Labiak & Prado 1998), entre outros. Os trabalhos podem enfocar ainda uma categoria ecológica, como os hemiepífitos (Daniels & Lawton 1993;Prosperi et al 1995;Putz et al 1995).…”

Section: Introductionunclassified

Epífitos vasculares sobre espécimes de Ficus organensis isoladas no norte da planície costeira do Rio Grande do Sul: padrões de abundância e distribuição

Gonçalves

Waechter

2002

Acta Bot. Bras.

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RESUMO -(Epífitos vasculares sobre espécimes deFicus organensis isolados no norte da planície costeira do Rio Grande do Sul: padrões de abundância e distribuição). Os padrões de abundância e distribuição de epífitos vasculares foram estudados em espécimes isolados de Ficus organensis (Miq.) Miq. no norte da planície costeira do Rio Grande do Sul. A área de estudo está situada próximo ao Município de Terra de Areia (29º35'S; 50º04'W), uma região com clima subtropical úmido (Cfa). Um total de 60 árvores foram escaladas para o inventário dos epífitos vasculares. A abundância relativa foi estimada para as espécies e o índice de diversidade de Shannon para a comunidade. A distribuição espacial dos epífitos vasculares foi estimada analisando sua ocorrência em segmentos estruturais das árvores hospedeiras (fuste, copas interna e externa) e aplicando uma técnica de análise multivariada (PCO). A composição florística resultou em 77 espécies, 32 gêneros e 10 famílias, com um índice de Shannon de 3,519 nats. Quatro espécies apresentaram valores de importância distintamente maiores, 12 valores intermediários e 61 valores relativamente menores. O mesmo padrão foi obtido com a ordenação das espécies. A riqueza epifítica por segmentos das árvores hospedeiras mostrou-se maior na copa interna, refletindo um hábitat mais favorável provido pelos ramos espessos e horizontais. A diversidade comunitária é relativamente alta considerando-se uma única espécie de forófito e um conjunto de ambientes perturbados. A distribuição das espécies epifíticas em três grupos em função das estimativas de abundância foi previamente observada para florestas costeiras melhor preservadas na mesma região. Palavras-chave -Epifitismo, abundância, distribuição, figueiras, Sul do BrasilABSTRACT -(Vascular epiphytes on isolated specimens of Ficus organensis in the northern coastal plain of Rio Grande do Sul: abundance and distribution patterns). Abundance and distribution patterns of vascular epiphytes were studied on isolated specimens of Ficus organensis in the northern coastal plain of Rio Grande Sul. The study area lies around Terra de Areia town (29°35'S; 50°04'W), a region with a humid subtropical climate (Cfa). A total of 60 trees were climbed for the inventory of vascular epiphytes. Abundance parameters were estimated for the species and the Shannon diversity index was calculated for the community. Spatial distribution of vascular epiphytes was detected in two ways, one analyzing occurrence on structural segments of host trees (stem, inner and outer crown) and other applying a multivariate technique (principal coordinate analysis). Floristic composition resulted in 77 species, 32 genera and 10 families. The Shannon index of diversity resulted in 3.519 nats/individual. Four species presented a distinct higher value of importance, 12 species presented intermediate values and 61 relatively lower values. The same pattern was obtained with the ordination of species. Epiphytic richness according to host tree segments showed the higher species number in the...

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Host specificity and low reproductive success in the rare endemic Puerto Rican orchid Lepanthes caritensis

Cited by 84 publications

References 29 publications

Update on the distribution of Lepanthes caritensis, a rare Puerto Rican endemic orchid

Update on the distribution of Lepanthes caritensis, a rare Puerto Rican endemic orchid

How prevalent is crassulacean acid metabolism among vascular epiphytes?

Epífitos vasculares sobre espécimes de Ficus organensis isoladas no norte da planície costeira do Rio Grande do Sul: padrões de abundância e distribuição

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