&lt;strong&gt;Freshwater decapods of Puerto Rico: a checklist and reports of new localities&lt;/strong&gt;

Pérez‐Reyes, Omar; Crowl, Todd A.; Hernández-García, Pablo J.; Ledesma-Fusté, Ricardo; Villar-Fornes, Fernando A.; Covich, Alan P.

doi:10.11646/zootaxa.3717.3.3

Cited by 16 publications

(15 citation statements)

References 59 publications

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“…The decapod communities in the MUW resemble the communities observed in the LUW and many other streams in the island (Pérez-Reyes et al 2013). Only 10 out the 18 decapods species present in the island were found in this stream.…”

Section: Discussionmentioning

confidence: 59%

“…Small numbers of Epilobocera sinuatifrons, the endemic freshwater crab of Puerto Rico, were observed in the headwater and suburban reaches of all the watersheds. Previous collections documented their presence in almost all types of freshwater bodies, from pristine montane streams to wetlands, karsts, and caves of the island (Pérez-Reyes et al 2013). The amphibious movement of adults and their direct development makes Epilobocera relatively resistant to changes in discharge and land use but sensitive to water pollution.…”

Section: Discussionmentioning

confidence: 99%

“…When the individuals were too small or immature to be identified, they were classified to genus or family. Taxonomic identification followed Chace and Hobbs (1969) and Pérez-Reyes et al 2013. The cephalothorax length (CL) of each decapod was measured from the postorbital region to the end of the carapace with a dial caliper (0.01 mm precision); the measurement from the tip of the rostrum was not used because the rostrum was missing in some individuals.…”

Section: Decapod Sampling and Processingmentioning

confidence: 99%

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Comparison of decapod communities across an urban-forest land use gradient in Puerto Rican streams

2015

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Urbanization influences a range of factors related to stream health, including the hydrologic regime, water quality, and riparian conditions that lead to negative effects on terrestrial and aquatic ecosystems. However, impacts on freshwater decapods from urbanization of tropical streams have not been reported. We hypothesized that changes in decapod communities in watersheds with different levels of urbanization are related to changes in physical stream habitats caused by different land uses and their effects on water discharge. The impacts of land use on the physico-chemical characteristics of streams and freshwater decapod communities were evaluated in three watersheds characterized by low, moderate and highintensities of urbanization in Puerto Rico. For the low and moderately developed urban watersheds, decapod species richness ranged from 10 to 11 species; the highly urbanized watershed only had 4 species. Macrobrachium faustinum and Xiphocaris elongata were the most ubiquitously species and were found in all watersheds. Multivariable analysis of physical characteristics and densities of the decapod families resulted in one axis that explained 80 % of the total variation among the watersheds and was correlated with stream discharge. The effect of discharge is likely a result of frequent high flows that sustain habitats with high concentrations of dissolved oxygen and low concentrations of pollutants. An increase in physicochemical parameters were observed from the LUW to the HUW. These results indicate that the decapod communities were most likely influenced by land use and environmental conditions that affected erosional aspects related to water discharge and water quality in the highly impacted watersheds.

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 99%

Section: Decapod Sampling and Processingmentioning

confidence: 99%

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Comparison of decapod communities across an urban-forest land use gradient in Puerto Rican streams

2015

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“…Asignación de los valores de tolerancia para el Biological Monitoring Working Party, Puerto Rico (BMWP-PR) y el Índice Biótico de Familias, Puerto Rico (IBF-PR). La lista de familias de macroinvertebrados acuáticos se compiló utilizando la literatura disponible para Puerto Rico (i.e., Gutiérrez-Fonseca et al, 2013, Pérez-Reyes et al, 2013. Además, se revisaron las colecciones de investigación del laboratorio de ecología acuática de la Universidad de Puerto Rico, que incluyen muestras de numerosos proyectos académicos, tesis de maestría y doctorado, y cursos de campo.…”

Section: Materiales Y Métodosunclassified

Ecological evaluation of streams in Puerto Rico: major threats and evaluation tools

Gutiérrez‐Fonseca

Ramírez

2016

Hidrobiológica

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2016. Evaluación de la calidad ecológica de los ríos en Puerto Rico: principales amenazas y herramientas de evaluación. Hidrobiológica 26 (3): 433-441. RESUMENAntecedentes. Los ecosistemas de río reflejan los impactos que los seres humanos tienen sobre el ambiente. Entender las amenazas a los que están expuestos estos ecosistemas y tener herramientas para evaluar estos impactos es esencial para la conservación y el manejo de los ecosistemas acuáticos. Puerto Rico es una isla oceánica con alta presencia humana y altas presiones de uso sobre sus recursos de agua dulce que resultan en impactos sobre los cuerpos de agua. Los insectos acuáticos responden claramente a la contaminación y son buenos indicadores de los impactos antropogénicos en ríos. Objetivos. Describir las principales amenazas a la condición ecológica de los ríos en Puerto Rico y proponer dos índices ecológicos basados en macroinvertebrados que permite la evaluación de la condición de los ríos en la isla. Métodos. Se propone una metodología estándar de muestreo para el uso adecuado de los índices Biological Monitoring Working Party (BMWP) e Índice Biótico de Familias (IBF) modificados para Puerto Rico. Resultados. Las mayores amenazas sobre los ecosistemas acuáticos de Puerto Rico están asociadas a la urbanización, la extracción de agua, y descargas de aguas residuales no tratadas. Para la elaboración de los índices, se le asignó un valor de tolerancia a cada uno de los 87 grupos taxonómicos de macroinvertebrados acuáticos reportados para Puerto Rico. Basados en muestreos, se desarrollaron escalas de impacto para el BMWP-PR y el IBF-PR. Además, se desarrolló una metodología estandarizada para evitar sesgos de muestreo. Conclusiones. El estado de conservación de los ríos en Puerto Rico es relativamente bueno comparado con otras regiones tropicales. Los índices propuestos (BMWP-PR, IBF-PR) representan las primeras herramientas desarrolladas para la isla con el objetivo de evaluar la condición ecológica de los ríos. Los índices se proponen como un punto de partida, futuros esfuerzos deben contemplar la elaboración de herramientas adicionales.Palabras clave: Biological Monitoring Working Party, biomonitoreo acuático, conservación, ecología de ríos, Índice Biótico de Familias. ABSTRACTBackground. Stream ecosystems reflect human impacts on the environment. An understanding of the threats affecting these ecosystems and the development of tools to assess them is key for the conservation and management of aquatic ecosystems. Puerto Rico is an oceanic island with dense human presence and strong pressures over freshwater resources that result in the degradation of water bodies. Aquatic macroinvertebrates respond to pollution and are good indicators of anthropogenic impacts on streams. Goals. To describe major threats to the ecological condition of streams in Puerto Rico and introduce two biomonitoring indices based on macroinvertebrates that allow for the assessment of stream condition on the island. Methods. We proposed a standardized methodology for the use of ...

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“…Progress with identification of the decapod species diversity in Caribbean fresh waters (e.g. Karge, Page & Klotz, ; Pérez‐Reyes et al ., ) has stimulated more ecological research now that investigators can study the dispersal (Kikkert, Crowl & Covich, ) and evolution of co‐occurring species (Page et al ., ; Bauer, ). Understanding of the primary controls on growth rates (Bright, ; Yam & Dudgeon, ; Vogt, ) and predator–prey dynamics (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effects of food supplies and water temperature on growth rates of two species of freshwater tropical shrimps

2015

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1. Growth rates of individual freshwater shrimp of the species Atya lanipes and Xiphocaris elongata were measured in a second-order stream in the Luquillo Experimental Forest in Puerto Rico over 10 years (1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007). Shrimp living at lower altitudes in warmer water and wider stream channels with more algal and detrital foods were predicted to grow and reproduce more rapidly. 2. Shrimp were marked and recaptured periodically in pools located at three altitudes to determine whether temperature affected growth rates among individual A. lanipes and X. elongata. 3. Mean annual water temperatures ranged from 20 to 24°C with the uppermost pool being cooler than the lower pools. Mean annual growth rates for Atya and Xiphocaris were 0.27 and 0.1 mm carapace length, respectively, for all three populations. 4. Differences in growth were partially influenced by how each species obtains its food. Atya is a filter feeder and scraper and has continuous access to suspended organic particles and biofilms. The slower growth rate for Xiphocaris elongata is most likely a result of the wider range in quality and accessibility of food resources. 5. Differences in pool morphology and depths probably affected differences in food availability. Increased leaf litter retention in the deeper upper and lower pools probably increased shrimp growth rates, while washout of leaf litter from the relatively shallow, elongate mid-altitude pool decreased Atya lanipes growth rates. 6. These long-lived, slow-growing shrimp species transform a wide range of organic materials into their biomass. Because of the slow growth rates of these detritivores shrimp, tropical storms, hurricanes, droughts or other disturbances could have persistent, long-term impacts on detrital processing and on the populations of their predators.

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<strong>Freshwater decapods of Puerto Rico: a checklist and reports of new localities</strong>

Cited by 16 publications

References 59 publications

Comparison of decapod communities across an urban-forest land use gradient in Puerto Rican streams

Comparison of decapod communities across an urban-forest land use gradient in Puerto Rican streams

Ecological evaluation of streams in Puerto Rico: major threats and evaluation tools

Effects of food supplies and water temperature on growth rates of two species of freshwater tropical shrimps

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