The present work shows the results of flora and vegetation study made between 2007 and 2009 on Santa Rosa wetland (Chancay - Lima). The vascular flora was composed for 66 species, grouped on 57 genus and 26 families. The Poaceae (16), Cyperaceae (6) and Asteraceae (6) are the more diverse families and represent the 42% of the flora. A comparison between the principal wetlands of Lima shows that Santa Rosa has more plant species (Pantanos de Villa (65), Paraíso (26) and Medio Mundo (16)). The analysis of floristic similarity between those localities shows that Santa Rosa is more similar to Pantanos de Villa (Lima) than the other localities. Using a Correspondence Analysis (CA), it was possible to recognize just three kinds of plant communities: a) Floating aquatic plants community, b) Totoral with associated species and c) Mixed Vega. It is considered that the changes on the plant commun...

This work shows the results of the vascular flora inventory of Pantanos de Villa carried out in 2007, also, the floristic changes of the last years are analyzed. 47 wild species have been registered, included in 43 genus and 27 families. The higher species number were found in Poaceae (7), Cyperaceae (4) and Asteraceae (4). We reported 7 wilds species as new records for the wetland: Alternanthera pubiflora, Alternanthera halimifolia, Limnobium laevigatum, Colocasia esculenta, Rumex obtusifolius, Elodea potamogeton, Plantago major. Also we found 11 cultivated species in the wetland. The results show a decrease in species richness compared with previous studies, mainly of aquatic species. Similarity analysis with previous studies indicates a change in the composition of the flora in time.

Puerto Viejo wetlands is a coastal marine ecosystem southern of Lima. Since 2008, this wetlands was protected by the Peruvian State and declared a Wetland Reserved Zone of Puerto Viejo, a transitory category provided by SINANPE (Sistema Nacional de Áreas Naturales Protegidas por el Estado). In April 2017, a Ministerial Resolution did reversal [desafectación] the transitory protection of Puerto Viejo Wetlands, losing the category of Reserved Zone and being legally unprotected. The present work analyzes and discusses the technical criteria for the reversal (representativeness, efficiency, consistency, connectivity, equilibrium, complementarity and external coherence) that were applied to Puerto Viejo Wetland.

In wild mammals, atypical coloration patterns such as albinism occur at a low frequency and are poorly reported in the literature. Therefore, discovery of cases of coloration anomalies are important to better understand this phenomenon. Here, we describe the first reported case of albinism in Cavia tschudii “Wild Guinea Pig” from the central coast of Peru. This discovery also represents the first record of albinism for the genus Cavia in the Neotropics.

Fires have become a recurrent menace to wetlands of the central coast of Peru. However, the scientific knowledge of its impacts is scarce and does not allow adequate prevention measures. This study evaluated the current state of knowledge of fires recorded for wetland Los Pantanos de Villa Wildlife Refuge, as well as the species affected by these events. In the last ten years, four fires have impacted the Pantanos de Villa, affecting 3.51% of the surface of the wetland. The rushes were the plant community most impacted by the fires. We identified 34 species frequently affected by these disturbances, 12 belonging to flora and 22 to fauna, including vulnerable species as well as species new to science. These data show the need to strengthen scientific studies that quantify the effects of fire on the tropical coastal wetland. Finally, we discuss the problem of recurrent fires in this protec...

El presente trabajo muestra los resultados de un estudio de la flora y vegetación del humedal de Santa Rosa (Chancay, Lima) realizado entre los años 2007 y 2009. La flora vascular estuvo conformada por 66 especies agrupadas en 57 géneros y 26 familias. Las Poaceae (16), Cyperaceae (6) y Asteraceae (6) fueron las familias más diversas y constituyeron el 42% de la flora total. En comparación con los principales humedales de Lima, Santa Rosa presenta un mayor número de especies (Pantanos de Villa (65), Paraíso (26) y Medio Mundo (16)). El análisis de similitud florística muestra que Santa Rosa es más semejante a Los Pantanos de Villa (Lima). El Análisis de Correspondencia (AC) determinó tres comunidades vegetales predominantes: a) Comunidad de acuáticas flotantes, b) Totoral y asociadas y c) Vega Mixta. Se considera que los cambios en la estructura de las comunidades vegetales ...

Se presentan los resultados del estudio de la flora vascular de los Pantanos de Villa realizadas en el 2007 y se analiza los cambios florísticos en los últimos años. Se registraron 47 especies silvestres comprendidas en 43 géneros y 27 familias. Las familias con mayor numero de especies fueron Poaceae (7), Cyperaceae (4) y Asteraceae (4). Se reportan 7 especies silvestres como nuevos registros para el humedal: Alternanthera pubiflora, Alternanthera halimifolia, Limnobium laevigatum, Colocasia esculenta, Rumex obtusifolius, Elodea potamogeton, Plantago major. Se encontraron 11 especies cultivadas en el ecosistema. En comparación con estudios anteriores, los resultados muestran una disminución en la riqueza florística, principalmente de las especies acuáticas. El análisis de similitud con anteriores estudios indica un cambio en la composición de la flora en el tiempo.

Los humedales de Puerto Viejo son un ecosistema marino costero ubicado en el Sur de la ciudad de Lima. El año 2008, este ecosistema fue protegido por el estado y declarado Zona Reservada Humedales de Puerto Viejo, una categoría transitoria que brinda el SINANPE (Sistema Nacional de Áreas Naturales Protegidas por el Estado). En abril del 2017, una Resolución Ministerial declaró la desafectación de los Humedal de Puerto Viejo, perdiendo la categoría de Zona Reservada y quedando desprotegida legalmente. El presente trabajo analiza y discute los criterios técnicos de desafectación (representatividad, eficiencia, consistencia, conectividad, equilibrio, complementariedad y coherencia externa) que fueron aplicados al Humedal de Puerto Viejo.

In wild mammals, atypical coloration patterns such as albinism occur at a low frequency and are poorly reported in the literature. Therefore, discovery of cases of coloration anomalies are important to better understand this phenomenon. Here, we describe the first reported case of albinism in Cavia tschudii “Wild Guinea Pig” from the central coast of Peru. This discovery also represents the first record of albinism for the genus Cavia in the Neotropics.

Fires have become a recurrent menace to wetlands of the central coast of Peru. However, the scientific knowledge of its impacts is scarce and does not allow adequate prevention measures. This study evaluated the current state of knowledge of fires recorded for wetland Los Pantanos de Villa Wildlife Refuge, as well as the species affected by these events. In the last ten years, four fires have impacted the Pantanos de Villa, affecting 3.51% of the surface of the wetland. The rushes were the plant community most impacted by the fires. We identified 34 species frequently affected by these disturbances, 12 belonging to flora and 22 to fauna, including vulnerable species as well as species new to science. These data show the need to strengthen scientific studies that quantify the effects of fire on the tropical coastal wetland. Finally, we discuss the problem of recurrent fires in this protec...

Fires have become a recurrent menace to wetlands of the central coast of Peru. However, the scientific knowledge of its impacts is scarce and does not allow adequate prevention measures. This study evaluated the current state of knowledge of fires recorded for wetland Los Pantanos de Villa Wildlife Refuge, as well as the species affected by these events. In the last ten years, four fires have impacted the Pantanos de Villa, affecting 3.51% of the surface of the wetland. The rushes were the plant community most impacted by the fires. We identified 34 species frequently affected by these disturbances, 12 belonging to flora and 22 to fauna, including vulnerable species as well as species new to science. These data show the need to strengthen scientific studies that quantify the effects of fire on the tropical coastal wetland. Finally, we discuss the problem of recurrent fires in this protec...

Fires have become a recurrent menace to wetlands of the central coast of Peru. However, the scientific knowledge of its impacts is scarce and does not allow adequate prevention measures. This study evaluated the current state of knowledge of fires recorded for wetland Los Pantanos de Villa Wildlife Refuge, as well as the species affected by these events. In the last ten years, four fires have impacted the Pantanos de Villa, affecting 3.51% of the surface of the wetland. The rushes were the plant community most impacted by the fires. We identified 34 species frequently affected by these disturbances, 12 belonging to flora and 22 to fauna, including vulnerable species as well as species new to science. These data show the need to strengthen scientific studies that quantify the effects of fire on the tropical coastal wetland. Finally, we discuss the problem of recurrent fires in this protec...

In the wetlands of Peru’s central coast, fires are a recurrent problem. Little is known concerning their impact on vegetation and the recovery strategies adopted by that vegetation in response to such events. The goal of this study is to provide information regarding changes in vegetation cover, density, growth and plant species diversity during the first 155 days after a fire that occurred at the Ventanilla Wetlands Regional Conservation Area (RCA). In order to evaluate the area, 51 plots, each measuring 1m2, were established. In these, the following information was recorded: a) Number of stems that survived the fire, divided by species; b) The length of new shoots, divided by species; c) The phenological stage of each stem; and d) Plant cover, obtained via visual estimation. Schoenoplectus americanus (bulrush) was the fastest to recover, followed by Distichlis spicata-Sporob...

El estado de conservación de un ecosistema puede ser medido mediante su valor ecológico. Como parte de una serie de normas en el marco del Sistema Nacional de Evaluación de Impacto Ambiental, el Ministerio del Ambiente del Perú ha publicado la metodología para calcular el valor ecológico de ecosistemas altoandinos en la “Guía Complementaria para la Compensación Ambiental: Ecosistemas Altoandinos”. En la actualidad existen guías de evaluación del estado de conservación de ciertos tipos de ecosistemas; sin embargo, no se cuenta aún con una guía que defina los indicadores y atributos ecológicos para humedales costeros. El presente estudio propone ocho indicadores considerados como idóneos para calcular el valor ecológico de los humedales costeros del Perú, seleccionados mediante un índice de idoneidad. Como caso de estudio, se calculó el valor ecológico de cuatro hum...