A review of factors associated with decline and death of mangroves, with particular reference to fungal pathogens

Osorio, J. Alexander; Wingfield, Michael J.; Roux, Jolanda

doi:10.1016/j.sajb.2014.08.010

Cited by 33 publications

(23 citation statements)

References 70 publications

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“…De la estabilidad y supervivencia de los bosques de manglar en el golfo de Urabá, depende la principal fuente de ingresos para las comunidades locales (Blanco et al 2012, Urrego et al 2014) y a pesar de esto se sabe poco sobre las enfermedades que los afectan, especialmente las causadas por microorganismos. Dada la productividad y los servicios ecosistémicos que los manglares prestan (Vo et al 2012), estos ecosistemas se han ido convirtiendo en un atractivo para los investigadores de muchos campos diferentes, sin embargo, las relaciones simbióticas, especialmente con hongos, son aún un campo relativamente inexplorado (Osorio et al 2014).…”

Section: Discussionunclassified

“…Dichas agallas semejan un afloramiento de la corteza externa, de consistencia dura y sin ningún tipo de secreción. Su origen en el golfo de Urabá es aún desconocido (Urrego et al 2010), y a pesar de que R. mangle forma extensos rodales mono-específicos naturales en el Caribe, los registros sobre las patologías que lo afectan, sus sintomatologías y los efectos sobre las variables estructurales y el crecimiento de los árboles son poco frecuentes (Kohlmeyer 1969, Barnard y Freeman 1982, Teas y McEwan 1982, Tomlinson 1986, Wier et al 2000, Osorio et al 2014). …”

Section: Introductionunclassified

“…Hasta ahora se desconoce el impacto real de esta afección sobre los manglares del golfo de Urabá, sin embargo, teniendo en cuenta la alta demanda de su madera en muchas partes del mundo, es irónico que tan solo un número limitado de estudios hayan examinado el impacto de esta enfermedad sobre la estructura de los árboles (Osorio et al 2014). En esta investigación se propuso evaluar la relación entre la incidencia de agallas y las variables estructurales de poblaciones de R. mangle (mangle rojo) encontradas en los bosques de manglar del golfo de Urabá.…”

Section: Introductionunclassified

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Relación entre la infección por agallas, las variables estructurales y la anatomía de la madera de Rhizophora mangle L., en el golfo de Urabá (Colombia)

2017

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Section: Discussionunclassified

Section: Introductionunclassified

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Relación entre la infección por agallas, las variables estructurales y la anatomía de la madera de Rhizophora mangle L., en el golfo de Urabá (Colombia)

2017

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“…Unfortunately, the future of the mangrove forests is increasingly questioned owing to a number of threats (natural and anthropogenic) that generally affect negatively the ecological and biophysical integrity of this ecosystem (Smith et al 1994, Alongi 2002, Polidoro et al 2010, Daru et al 2013. Natural threats to mangroves are climate related, including tsunami, cyclones, floods, sea level rise , Simard et al 2019, but also diseases (Spalding et al 1997, Osorio et al 2016. These diseases may affect the dynamic of mangrove populations through their inhibitive effects on mangrove fruit germination (Robertson et al 1992, Smith 1992.…”

Section: Introductionmentioning

confidence: 99%

Strong seedling recruitment does not limit mangrove vulnerability to harvest

Gaoue

Yessoufou

2019

Environ. Res. Lett.

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Ecological studies on the impacts of timber harvesting contributed to inform sustainable management strategies of tropical forests. However, these studies rely strongly on two major assumptions: (i) strong seedlings recruitment predispose for positive population dynamics, and (ii) more adult trees is a guarantee for a strong reproductive capability of the population. These assumptions are applied without accounting for the life history of the harvested species. Here, we revisit these assumptions in light of the life history theory, which predicts different responses of short-and long-lived species to perturbation. We predict that harvesting adults, rather than reducing seedling recruitment of longlived species, would have greater impact on population dynamics. We tested our prediction on three mangrove species in South Africa. First, we reconstructed the projection matrices for three mangrove species in the Mngazana Estuary of Eastern Cape province of South Africa. Next, we simulated a range of harvest intensities for different life stages and explored how harvesting influences population dynamics. Finally, we examined the age-specific mortality trajectories for all three species. We found that populations of all three species were closer to their stable stage distribution. Contrary to popular belief, we found that changes in seedling recruitment will have minimal effects on mangrove longterm population dynamics, a finding consistent with the life history theory. However, contrary to expectation, simulating harvest of adults had minimal effect on population dynamics. This is due to low reproductive values for these late stages. Our analysis of age-specific mortality trajectories further provided evidence for positive senescence particularly for Avicennia which was the least resilient to harvest. Our findings cast doubt on the traditional forest management strategies that rely strongly on seedling density as a metric of sustainability and forbid unquestionably harvesting large individuals. We call for caution while generalizing forest management strategies irrespective of the life history of the species at hand.

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“…Mangroves are, however, frequently threatened by anthropogenic activities and/or environmental factors (Spalding 2010). Despite their importance there have been relatively few studies to consider the impact of microbial diseases on these trees (Osorio et al 2014). Diseases that have been reported from mangroves include branch cankers, leaf spots and die-back of trees (Barnard and Freeman 1982;Teas et al 1982;Wier et al 2000;Tattar and Scott 2004;Osorio et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Pseudocercospora mapelanensis sp. nov., associated with a fruit and leaf disease of Barringtonia racemosa in South Africa

Osorio

Wingfield

Beer

et al. 2015

Australasian Plant Pathol.

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Barringtonia racemosa (Lecythidaceae) is a widely distributed mangrove associate in coastal areas of Africa, Asia and Australia. During routine disease surveys along the east coast of the KwaZulu-Natal Province in South Africa, B. racemosa trees were observed showing symptoms of leaf infection and necrotic lesions on fruits. A previously undescribed species of Pseudocercospora was commonly associated with these symptoms. 1 This fungus is described as Pseudocercospora mapelanensis sp. nov., based on multi-gene sequence analyses of the ACT, ITS, LSU and TEF genome regions, as well as morphological characteristics.

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A review of factors associated with decline and death of mangroves, with particular reference to fungal pathogens

Cited by 33 publications

References 70 publications

Relación entre la infección por agallas, las variables estructurales y la anatomía de la madera de Rhizophora mangle L., en el golfo de Urabá (Colombia)

Relación entre la infección por agallas, las variables estructurales y la anatomía de la madera de Rhizophora mangle L., en el golfo de Urabá (Colombia)

Strong seedling recruitment does not limit mangrove vulnerability to harvest

Pseudocercospora mapelanensis sp. nov., associated with a fruit and leaf disease of Barringtonia racemosa in South Africa

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