Comparison of pollen distribution patterns in surface sediments of a Colombian Caribbean mangrove with geomorphology and vegetation

Urrego, Ligia E.; Franco, Germán; Polanía, Jaime

doi:10.1016/j.revpalbo.2009.04.004

Cited by 44 publications

(47 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Aun bajo estas condiciones de aridez en la península de la Guajira, es claro que la persistencia de los manglares ante el ascenso del nivel del mar depende de condiciones de alta sedimentación (0,98 cm/año, comparado con valores de baja sedimentación en otra localidad: 0,08 cm/año). La expansión de los manglares es aún más clara desde 1930 en zonas de alta sedimentación (0,13-0,33 cm/ año) del Caribe sur como la bahía de Cispatá en el delta Tinajones en Córdoba, producto del mayor aporte de agua y sedimentos continentales del río Sinú (Urrego et al 2009). Adicionalmente, a pesar de la gran dinámica espacial de las coberturas en el delta producto de los cambios hidrodinámicos, el contenido de polen de Rhizophora ha aumentado de manera lineal desde 1500 (Castaño et al 2010).…”

Section: Resultados Y Discusiónunclassified

“…Se contextualizó la información sobre pérdida de manglar por erosión costera con las evidencias de campo (v.g., árboles muertos en pie, las raíces sumergidas o las raíces socavadas) y el modelo de oleaje del golfo de Urabá (Osorio et al 2010a), también obtenidos durante la "Expedición". También se contextualizó dicha pérdida y ganancia con las tendencias de velocidad del ascenso del nivel del mar en el Caribe colombiano (Castaño et al 2010, Restrepo et al 2012, Ruíz 2013, Ruíz-Ochoa et al 2008, Urrego et al 2009.…”

Section: Materiales Y Métodosunclassified

See 1 more Smart Citation

Cambios globales en los manglares del golfo de Urabá (Colombia): entre la cambiante línea costera y la frontera agropecuaria en expansión

Blanco-Libreros

2016

Actual Biol

View full text Add to dashboard Cite

ResumenLas alteraciones del nivel medio local del mar y la deforestación son dos cambios globales que impactan severamente a los manglares del Caribe colombiano, pero poco se ha discutido acerca de ellos en el golfo de Urabá. El objetivo de esta revisión es sintetizar la literatura publicada sobre esos temas en esta área. Este golfo presenta extensas áreas estructuralmente diferentes a las del resto del Caribe, que están disminuyendo y degradándose como producto de: a) la erosión costera y el aumento del nivel del mar; b) la entresaca de árboles y la expansión de la frontera agrícola; y c) la deforestación de las cuencas y la exportación de sedimentos hacia los estuarios. El delta del río Atrato y varios microdeltas de la costa oriental se expandieron, mientras que la ensenada de Rionegro permaneció estable, al menos durante el siglo XX. La costa oriental, con las áreas más pequeñas de manglar, se erosionó varios metros por año debido a la deriva litoral. Cerca a la cabecera municipal de Turbo, la entresaca de árboles para diferentes fines ha reducido el diámetro promedio de Rhizophora mangle y ha aumentado el valor de importancia de Laguncularia racemosa, afectando el reservorio de biomasa y carbono aéreos. La expansión de la frontera agropecuaria ha reducido la extensión de los rodales interiores de Avicennia germinans. La alta tasa de deforestación de las cuencas y planicies costeras de la zona bananera ha incrementado la carga de sedimentos de los ríos, la cual se acumula en los deltas. En estos, los manglares retienen cantidades significativas de sedimentos, con posible detrimento de la colonización y sobrevivencia de plántulas y macroinvertebrados bénticos. En conclusión, en el golfo de Urabá se presentan en la actualidad cambios globales naturales y antropogénicos de magnitudes significativas, tanto en la zona litoral como en las cuencas costeras, los cuales requieren una urgente implementación de medidas de adaptación dentro de los planes de manejo de los manglares y de la zona costera.Palabras clave: conversión agrícola, deforestación, erosión costera, manglares, sedimentación A AbstractAccelerated mean sea level rise and deforestation are two global changes severely impacting mangroves along the Colombian Caribbean coast, but little has been discussed about them for the Gulf of Urabá. The objective of this review is to synthesize the published literature on such topics available to date for this area. This gulf holds extensive areas, structurally different from the rest of the Caribbean, which are shrinking and degrading as a consequence of: a) coastal erosion and sea level rise; b) selective logging and agricultural expansion; and c) watershed deforestation and sediment exports to the estuaries. The Atrato River delta, and several microdeltas located along the eastern coast have expanded, while the Rionegro Cove has remained relatively unchanged, at least during the 20 th century. The eastern coast, with the smalles mangrove patches, have eroded at a rate of various meters per year due to the littoral...

show abstract

Section: Resultados Y Discusiónunclassified

Section: Materiales Y Métodosunclassified

Cambios globales en los manglares del golfo de Urabá (Colombia): entre la cambiante línea costera y la frontera agropecuaria en expansión

Blanco-Libreros

2016

Actual Biol

View full text Add to dashboard Cite

show abstract

“…It is known that this fern proliferates in compacted, saline, and alkaline soils after mangrove clear cutting or hurricane-induced mass mortality [64,68]. A recent study in Cispatá Lagoon System (Caribbean coast of Colombia) agreed that the high proportion of Laguncularia pollen may indicate the prevalence of anthropogenic disturbances on mangrove stands otherwise dominated by Rhizophora or Avicennia [69]. Nonetheless, Laguncularia pollen and Acrostichum spore records underscore the prevalence of human and natural disturbances in Caribbean mangroves, because pollen and spores are widespread distributed by water and air [70].…”

Section: Selective Logging As a Driver Of Species Introgressions And mentioning

confidence: 99%

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

et al. 2012

View full text Add to dashboard Cite

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.

show abstract

“…This is because the pollen of Laguncularia is insect-pollinated and usually under-represented in the pollen record (Ellison, 2008). A percentage of 2-5% of Laguncularia in total pollen sum have been interpreted to represent mangrove forests dominated by white mangrove in previous studies (Behling et al, 2001;Urrego et al, 2009Urrego et al, , 2010. Only in two (#19, 20) out of the seven samples in the SRS-6 group do Laguncularia pollen exceed 10% of the pollen sum.…”

Section: Discussionmentioning

confidence: 99%

Changes in Modern Pollen Assemblages and Soil Geochemistry along Coastal Environmental Gradients in the Everglades of South Florida

Yao

Liu

2018

Front. Ecol. Evol.

View full text Add to dashboard Cite

This study aims to document the changes in modern pollen assemblages and soil elemental chemistry along broad edaphic, hydrological, and salinity gradients, including a previously undocumented secondary environmental gradient, in a vast mangrove-dominated wetland region in the Everglades, South Florida. Twenty-five soil surface samples were collected along an interior wetland transect and an estuarine mangrove transect across coastal zones in the Everglades National Park and subjected to palynological and XRF analyses. Modern pollen spectra from the sampling sites were classified into five a priori groups-wet prairie, pineland, inland mangroves, coastal mangroves, and fringe mangroves, based on the five vegetation types and sub-environments from which they were collected. Discriminant analysis shows that all (100%) of the samples are correctly classified into their a priori groups. On a broad scale, the modern pollen assemblages in surface samples collected from different vegetation types reflect the primary environmental gradient in the Florida Coastal Everglades. A distinct salinity and chemical gradient is also recorded in the XRF results, and the complexity of these gradients is captured at both regional and local scales. At the regional scale, concentrations of all the elements increase from terrestrial toward coastal sites. At the local scale, XRF results show a progressive decrease in most chemical concentrations and in the Cl/Br and Ca/Ti ratios away from the Shark River Slough at each individual site, suggesting that a secondary fluvial/tidal gradient also exists locally as a function of the distance from the river, the main carrier of these chemicals. This study provides new evidence to show that tidal flooding from the Shark River Estuary is directly related to the nutrient availability in the surrounding mangrove forests. These data will deepen our understanding of the environmental drivers behind the vegetation zonation in the region, especially in the mangrove ecosystems, and fill a gap in the pollen data network for the Everglades.

show abstract

Comparison of pollen distribution patterns in surface sediments of a Colombian Caribbean mangrove with geomorphology and vegetation

Cited by 44 publications

References 39 publications

Cambios globales en los manglares del golfo de Urabá (Colombia): entre la cambiante línea costera y la frontera agropecuaria en expansión

Cambios globales en los manglares del golfo de Urabá (Colombia): entre la cambiante línea costera y la frontera agropecuaria en expansión

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

Changes in Modern Pollen Assemblages and Soil Geochemistry along Coastal Environmental Gradients in the Everglades of South Florida

Contact Info

Product

Resources

About