Hamilton Beltrán

Modified Whittaker Plots as an Assessment and Monitoring Tool for Vegetation in a Lowland Tropical Rainforest

Resource exploitation in lowland tropical forests is increasingand causing loss of biodiversity. Effective evaluation and management of the impacts of development on tropical forests requires appropriate assessment and monitoring tools. We proposethe use of 0.1-ha multi-scale, modified Whittaker plots (MWPs) to assess and monitor vegetation in lowland tropical rainforests.We established MWPs at 4 sites to: (1) describe and comparecomposition and structure of the sites using MWPs, (2) compare these results to those of 1-ha permanent vegetation plots (BDPs),and (3) evaluate the ability of MWPs to detect changes in populations (statistical power). We recorded more than 400 species at each site. Species composition among the sites was distinctive, while mean abundance and basal area was similar. Comparisons between MWPs and BDPs show that they record similarspecies composition and abundance and that both perform equallywell at detecting rare species. However, MWPs tend to record morespecies, and power analysis studies show that MWPs were more effective at detecting changes in the mean number of species of trees ≥10 cm in diameter at breast height (dbh) and in herbaceous plants. Ten MWPs were sufficient to detect a change of 11% in the mean number of herb species, and they were able to detect a 14% change in the mean number of species of trees ≥10 cm dbh. The value of MWPs for assessment and monitoringis discussed, along with recommendations for improving the sampling design to increase power.

Senecio albaniae (Asteraceae: Senecioneae), a new species from central Peru

A new species, Senecio albaniae (Asteraceae: Senecioneae), is described from central Peru. The species is characterized by its shrubby habit, decurrent leaf bases forming winged stems, and solitary capitula on elongated peduncles. The species is described and illustrated, and its possible relationships are discussed. RESUMEN. Una especie nueva, Senecio albaniae (Asteraceae: Senecioneae), se describe del Peru central. La especie es caracterizada por su habito arbustivo, hojas decurrentes y tallos alados, capitulo solitario con pediinculos 5-15 cm de longitud. Se describe e ilustra la especie, y discuto las relaciones potenciales de esta especie.

First record of Pilularia americana A. Braun (Polypodiidae, Salviniales, Marsileaceae) from Peru

The aquatic fern Pilularia americana A. Braun is known from several countries in South and North America. Here we provide a first report of this species for Peru, from 2 localities in the Ancash and Ayacucho regions (central Peru), which confirm its presence in the national flora.

FLORA Y VEGETACIÓN DE LA RESERVA NACIONAL DE CALIPUY, LA LIBERTAD

Resumen Desde el establecimiento de la Reserva Nacional de Calipuy en el ano 1981 a la fecha no se tenia conocimiento de la flora y vegetacion que alberga, como sucede en muchas de las areas protegidas por el Estado, siendo esta informacion importante para la ciencia, conservacion y gestion adecuada del area. El presente estudio da a conocer un primer listado de especies presentes en la Reserva Nacional de Calipuy. La RNC presenta cuatro unidades vegetales: matorral denso, matorral disperso, piso de cactaceas y vegetacion riberena, donde se distribuyen 470 especies vegetales en 82 familias. Quince especies son registradas por primera vez para La Libertad y una para la flora peruana; 59 especies son endemicas del Peru y 13 estan amparadas segun la legislacion peruana. Palabras clave: Calipuy, vegetacion, unidad vegetal, floristica. Abstract Since the establishment of the Calipuy National Reserve to date, its flora and vegetation remained unknown; this happens in many other state conservation areas of Peru, despite this information is important for science, conservation and appropriate management of the area. This study provides a first list of plant species in the Calipuy National Reserve (RNC). The RNC has four vegetal units: dense scrub, scattered scrub, cactus communities and riparian vegetation where 470 plant species are distributed in 82 families. Fifteen species are reported for the first time for La Libertad and one for the Peruvian flora; 59 species are endemic to Peru and 13 species are protected by Peruvian law. Keywords: Calipuy, vegetation, vegetal units, floristic.

EL GÉNERO SENECIO L. (ASTERACEAE-SENECIONEAE) EN EL DEPARTAMENTO DE LIMA, PERÚ

Resumen Se da a conocer una lista de 46 especies de Senecio L. (Asteraceae-Senecioneae) del departamento de Lima, Peru; de las cuales, 21 son endemicas del Peru y 4 exclusivas de Lima. Se proporciona informacion sobre la distribucion a nivel nacional y provincial dentro del departamento de Lima, asi como el rango altitudinal de cada especie. Se adicionan 12 nuevos registros. Palabras clave: taxonomia, endemicos, vertientes occidentales. Abstract A list of 46 species of Senecio L. (Asteraceae-Senecioneae) from the department of Lima, Peru, is presented, from which 21 are endemic from Peru and 4 are exclusive from Lima. Information about altitudinal range and national and provincial distribution in Lima Department is given. Twelve records for Lima are added. Keywords: taxonomy, endemic, western slopes.

GOCHNATIA PERUVIANA (ASTERACEAE: GOCHNATIEAE), UNA NUEVA ESPECIE DEL PERÚ

Resumen Gochnatia peruviana , un pequeno arbol con numerosos capitulos, colectado en el departamento de Ancash, se describe aqui como nueva especie, ademas, se discuten sus relaciones de parentesco. Palabras clave: Gochnatia peruviana, Asteraceae, Gochnatieae, especie nueva, Peru. Abstract Gochnatia peruviana, a small tree with numerous capitula, collected in the department of Ancash, is described here as a new species. Relationships with closely related species are also discussed. Keywords: Gochnatia peruviana, Asteraceae, Gochnatieae, sp. nov., Peru.