Hierarchical contribution of river–ocean connectivity, water chemistry, hydraulics, and substrate to the distribution of diadromous snails in Puerto Rican streams

Blanco, Juan F.; Scatena, Frederick N.

doi:10.1899/0887-3593(2006)25[82:hcorcw]2.0.co;2

Cited by 44 publications

(58 citation statements)

References 47 publications

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“…Computed from structure data from Urrego et al [39] and allometric equations from [46,47]. contrast, the bottom-dwelling and numerically dominant gastropod N. virginea moves extensively along the intertidal zone covered by mangroves due to their diadromous behavior [40,78,79], and, therefore, selective logging and clearing promote population fragmentation because they cannot venture out of the flooded areas, particularly into the newly established pastures [40,41]. We hypothesized that, as a consequence of N. virginea decline, sediment bioturbation and mangrove litter decomposition would be reduced.…”

Section: Impacts Of Selective Logging and Mangrove Reclamation On Benmentioning

confidence: 99%

Ecosystem-Wide Impacts of Deforestation in Mangroves: The Urabá Gulf (Colombian Caribbean) Case Study

et al. 2012

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Mangroves are ecologically important and extensive in the Neotropics, but they are visibly threatened by selective logging and conversion to pastures in the Southern Caribbean. The objective of this paper was to summarize the impacts of both threats on forest structure, species composition, aboveground biomass and carbon reservoir, species introgressions, and benthic fauna populations by collating past and current data and by using an interdisciplinary approach in the Urabá Gulf (Colombia) as a case study. Mangroves in the Eastern Coast have been decimated and have produced unskewed tree-diameter (DBH) distributions due to the overexploitation of Rhizophora mangle for poles (DBH range: 7-17 cm) and of Avicennia germinans for planks and pilings (DBH > 40 cm). Selective logging increased the importance value of the light-tolerant white mangrove Laguncularia racemosa, also increasing biomass and carbon storage in this species, thus offsetting reductions in other species. Introgressions (cryptic ecological degradation) by L. racemosa and Acrostichum aureum (mangrove fern) and low densities of otherwise dominant detritivore snails (Neritina virginea) were observed in periurban basin mangroves. Finally, basin mangroves were more threatened than fringing mangroves due to their proximity to expanding pastures, villages, and a coastal city.

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Section: Impacts Of Selective Logging and Mangrove Reclamation On Benmentioning

confidence: 99%

Ecosystem-Wide Impacts of Deforestation in Mangroves: The Urabá Gulf (Colombian Caribbean) Case Study

et al. 2012

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“…Sin embargo, durante el periodo de menor precipitación podrían emerger, pero principalmente en climas más secos como los del norte del Chocó Biogeográfico y el Caribe. Las diferencias longitudinales parecen ser más prevalentes en la ecorregión Darién con el incremento del régimen de la sequía, tal como se ha observado en quebradas del Caribe donde algunos grupos de fauna diádroma como los caracoles desaparecen (Blanco & Scatena, 2006).…”

Section: Discussionunclassified

“…Estos controles desde el tope de las redes tróficas (top-down controls) son los principales responsables de las desviaciones de las predicciones del CRC en quebradas de Puerto Rico (Greathouse & Pringle, 2006). Finalmente, a pesar de las grandes similitudes de los ensamblajes de fauna diádroma y fisonomía de las quebradas costeras del Chocó Biogeográ-fico con las de Centroamérica y Las Antillas, su carácter más distintivo es la baja densidad o ausencia generalizada de gasterópodos nerí-tidos, los cuales son los principales ramoneadores en las quebradas de doseles abiertos en otras regiones tropicales donde alcanzan altas densidades y biomasas (Blanco & Scatena, 2006;Greathouse & Pringle, 2006).…”

Section: Discussionunclassified

“…Sin embargo, debido a las diferencias geográficas dentro del Trópico, y entre éste y las zonas templadas, es necesario establecer qué tan generales son los patrones comunitarios y ecosistémicos allí encontrados (Boulton et al, 2008;Jacobsen, Cressa & Dudgeon, 2008;Boyero, Ramírez, Dudgeon & Pearson, 2009). Actualmente se acepta que los sistemas lóticos más estudiados del Neotrópico (Costa Rica y Puerto Rico: Ramírez & Hernández-Cruz, 2004;Blanco & Scatena, 2006;Greathouse & Pringle, 2006;Ramírez, Pringle & Douglas, 2006) son similares a los del océano Pacifico (e.g. Hong Kong, Hawaii, Polinesia Francesa y Nueva Zelanda; Winterbourn, Rounick & Cowie, 1981;Resh & De Szalay, 1995;Dudgeon, 2000;Craig 2003;Smith, Covich & Brasher, 2003) en términos de la composición taxonómica y las historias de vida de la fauna acuática (baja abundancia de insectos, ausencia de ordenes con poca capacidad de migración y sensibilidad fisiológica [Plecoptera, Ephemeroptera, Megaloptera], y dominancia en biomasa de moluscos, crustá-ceos y peces diádromos).…”

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Gorgona, Baudó y Darién (Chocó Biogeográfico, Colombia): ecorregiones modelo para los estudios ecológicos de comunidades de quebradas costeras

Blanco

Escobar-Sierra

2014

RBT

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Gorgona, Baudó and Darién (Biogeographic Chocó, Colombia): model ecoregions for coastal stream ecology studies. This paper summarizes the available information on the geology, hydrology, and biota of coastal streams located in the Gorgona National Natural Park (GNNP), and the Baudó and Darién ecoregions within the Biogeographic Chocó (Colombia). Despite of the scant number of studies, we hypothesized that these streams are consistent with the typology observed in volcanic oceanic islands in the Caribbean and the Pacific that do not conform to the tenets of the River Continuum Concept. Coastal streams in the Biogeographic Chocó are short (10 0 -10 1 km) and steep and waterfalls and cascades are frequent due to tectonic origin.Stepand-pool sequences are common in montane reaches, while cobble-bed glides and riffles dominate in coastal plain reaches. Flow regimes are flashy in Pacific drainages (annual rainfall: <7000mm), but seasonally dry in the Caribbean drainages (<3500mm). Therefore, floods and droughts are important drivers of communities and ecosystem processes. Canopies are closed in low-order streams discharging directly to the ocean, thus contributing large amounts of litter. Diadromous fish and shrimp dominate consumer assemblages and various species are shared with streams in the Central America and the Antilles. These species play ecological roles probably equivalent to those found in other regions. These coastal streams are unique in terms of the number of primary freshwater fishes found (some endemics), and the functionally absence of diadromous gastropods. Rev. Biol. Trop. 62 (Suppl. 1): 43-64. Epub 2014 February 01.

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“…Exhiben un ciclo de vida anfídromo (McDowall, 2007), que consiste en el desarrollo de diferentes etapas de vida alternadas en los ámbitos dulciacuícola y marino, presentando, por lo tanto, migraciones entre ambos (Crandall, 1999;Blanco & Scatena, 2006). Debido a los desplazamientos río arriba de los individuos reclutas y juveniles, que les llevan toda su vida (Shigemiya & Kato, 2001;Schneider & Lyons, 1993;Schneider & Frost, 1986;Pyron & Covich, 2003), las poblaciones se extienden varios kilómetros río arriba (Blanco & Scatena, 2006;Resh, Barnes & Craig, 1990). Esto también genera una segregación longitudinal de tallas, encontrándose individuos más pequeños principalmente en zonas bajas y cercanas a la desembocadura, mientras que los adultos predominan en las zonas altas (Shigemiya & Kato, 2001;Schneider & Lyons, 1993;Schneider & Frost, 1986;Pyron & Covich, 2003).…”

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Variación fenotípica de la concha en Neritinidae (Gastropoda: Neritimorpha) en ríos de Puerto Rico

Blanco

Tamayo

Scatena

2014

RBT

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Phenotypic variability of the shell in Neritinidae (Gastropoda: Neritimorpha) in Puerto Rican rivers. Gastropods of the Neritinidae family exhibit an amphidromous life cycle and an impressive variability in shell coloration in Puerto Rican streams and rivers. Various nominal species have been described, but Neritina virginea [Linné 1758], N. punctulata [Lamarck 1816] and N. reclivata [Say 1822] are the only broadly reported. However, recent studies have shown that these three species are sympatric at the river scale and that species determination might be difficult due to the presence of intermediate color morphs. Individuals (8 751) were collected from ten rivers across Puerto Rico, and from various segments and habitats in Mameyes River (the most pristine island-wide) during three years (2000)(2001)(2002)(2003), and they were assigned to one of seven phenotypes corresponding to nominal species and morphs (non-nominal species). The "axial lines and dots" morph corresponding to N. reclivata was the most frequent island-wide, while the patelliform N. punctulata was scant, but the only found in headwater reaches. The "yellowish large tongues" phenotype, typical of N. virginea s.s. was the most frequent in the river mouth. The frequency of secondary phenotypes varied broadly among rivers, along the rivers, and among habitats, seemly influenced by salinity and predation gradients. The occurrence of individuals with coloration shifts after predation injuries, suggests phenotypic plasticity in the three nominal species, and urges for the use of molecular markers to unravel the possible occurrence of a species complex, and to understand the genetic basis of polymorphism. The longitudinal distribution of individual sizes, population density and egg capsules suggested the adaptive value of upstream migration, possibly to avoid marine predators. Rev. Biol. Trop. 62 (Suppl. 2): 53-68. Epub 2014 April 01.

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Hierarchical contribution of river–ocean connectivity, water chemistry, hydraulics, and substrate to the distribution of diadromous snails in Puerto Rican streams

Cited by 44 publications

References 47 publications

Ecosystem-Wide Impacts of Deforestation in Mangroves: The Urabá Gulf (Colombian Caribbean) Case Study

Ecosystem-Wide Impacts of Deforestation in Mangroves: The Urabá Gulf (Colombian Caribbean) Case Study

Gorgona, Baudó y Darién (Chocó Biogeográfico, Colombia): ecorregiones modelo para los estudios ecológicos de comunidades de quebradas costeras

Variación fenotípica de la concha en Neritinidae (Gastropoda: Neritimorpha) en ríos de Puerto Rico

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