Differences in regeneration between hurricane damaged and clear-cut mangrove stands 25 years after clearing

Ferwerda, J.G.; Ketner, P.; McGuinness, Keith A.

doi:10.1007/s10750-007-0782-7

Cited by 21 publications

(23 citation statements)

References 18 publications

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“…According to the mangrove classification of Brocklehurst and Edmeades [24], Avicennia marina (Gray mangroves) and Ceriops tagal (Yellow mangroves) are the most dominant species for this area, though that study was completed nearly 20 years ago. Based on the more recent study of Ferwerda et al [25], there are some other species such as Bruguiera exaristata (Orange mangroves), Lumnitzera racemosa (Black mangroves), Rhizophora stylosa (Stilt mangroves), and Aegialitis annulata (Club mangroves) in the Rapid Creek mangrove forest. However, clear boundaries of individual mangrove species in this area have not been demarcated by any previous study.…”

Section: Study Areamentioning

confidence: 99%

“…Unfortunately, this did not coincide with the overpass of either sensor utilized (June 2010). However, the field data can still be considered valid for calibration and validation purposes, as it is unlikely that any large shifts in species composition of the site would have been experienced since that time [25]. Further, there was no record of any natural or human disturbances that could have had a devastating effect on the mangroves during this period.…”

Section: Field Surveymentioning

confidence: 99%

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Mangrove Species Identification: Comparing WorldView-2 with Aerial Photographs

et al. 2014

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Abstract:Remote sensing plays a critical role in mapping and monitoring mangroves. Aerial photographs and visual image interpretation techniques have historically been known to be the most common approach for mapping mangroves and species discrimination. However, with the availability of increased spectral resolution satellite imagery, and advances in digital image classification algorithms, there is now a potential to digitally classify mangroves to the species level. This study compares the accuracy of mangrove species maps derived from two different layer combinations of WorldView-2 images with those generated using high resolution aerial photographs captured by an UltraCamD camera over Rapid Creek coastal mangrove forest, Darwin, Australia. Mangrove and non-mangrove areas were discriminated using object-based image classification. Mangrove areas were then further classified into species using a support vector machine algorithm with best-fit parameters. Overall classification accuracy for the WorldView-2 data within the visible range was 89%. Kappa statistics provided a strong correlation between the classification and validation data. In contrast to this accuracy, the error matrix for the automated classification of aerial photographs indicated less promising results. In summary, it can be concluded that mangrove species mapping using a support vector machine algorithm is more successful with WorldView-2 data than with aerial photographs.

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Section: Study Areamentioning

confidence: 99%

Section: Field Surveymentioning

confidence: 99%

Mangrove Species Identification: Comparing WorldView-2 with Aerial Photographs

et al. 2014

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“…The model results showed that the presence of positive feedback between mangrove trees and seedling survival may enable mangroves to exist in (and expand to) areas where unaided establishment is unsuccessful. Conversely, after deforestation and severe erosion previously inhabited areas could become unsuitable for natural recovery not only due to changes in for instance inundation times (Baldwin et al 2001;Bosire et al 2008;Blasco et al 1996;Ferwerda et al 2007), but through loss of the positive feedback that allowed establishment in the first place. This confirms the hypothesis that a (Ferwerda et al 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Conversely, after deforestation and severe erosion previously inhabited areas could become unsuitable for natural recovery not only due to changes in for instance inundation times (Baldwin et al 2001;Bosire et al 2008;Blasco et al 1996;Ferwerda et al 2007), but through loss of the positive feedback that allowed establishment in the first place. This confirms the hypothesis that a (Ferwerda et al 2007). If no such stands are present, methods such as those used by Riley and Kent (1999) could be used to create them with particular care taken to provide the seedlings with the protection given by the adult mangroves.…”

Section: Discussionmentioning

confidence: 99%

Local positive feedback and the persistence and recovery of fringe Avicennia marina (Forssk.) vierh. mangroves

Huisman

Langevelde

Boer

2009

Wetlands Ecol Manage

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While mangrove restoration efforts are reasonably successful, failure often occurs in high wave energy situations. Due to differences in wave energy, seedling mortality rates vary strongly with position on the intertidal flat between high water spring and high water neap elevations. However, a local positive feedback can be present between the pneumatophores of adult mangroves and the survival of mangrove seedlings to trigger recovery. In this study, a mangrove population of Avicennia marina is modelled to determine the effects of seedling mortality and local positive feedback on mangrove recovery. The model uses life history data and dispersal to simulate population dynamics. The mangrove range limits are determined by high water spring and high water neap levels. The results indicate that within these limits mangrove populations with life-history parameter values as derived from literature are indeed capable of fast growth under conditions with low seedling mortality. Local positive feedback has then a small positive influence on population recovery after mangrove loss. If, however, mortality rates increase, such as in high wave energy situations, the importance of a positive feedback increases. The model shows that a positive feedback may, given high seedling mortality rates, be an important factor for mangrove recovery. While a positive feedback may enable mangrove persistence in unfavourable conditions, destruction of adult mangroves can remove the positive feedback, which would render the system uninhabitable and practically prohibits reforestation of such areas. The model results and the presence of positive feedbacks and their importance for population dynamics in harsh conditions indicate that investigating and understanding possible feedbacks could be crucial for successful restoration efforts.

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“…Mangrove trees require decades to achieve a certain structural maturity in areas with tensors or stressors (FERWERDA et al, 2007). These results were observed in mangroves in the Rio das Ostras estuary (RJ) where natural forests showed a better structure development compared to planted or restored forest areas (BERNINI et al, 2014).…”

Section: Introductionmentioning

confidence: 98%

THE RECOVERY OF A DEGRADED MANGROVE IN CEARÁ THROUGH THE PRODUCTION OF Laguncularia racemosa (L.) C.F. Gaertn. (Combretaceae) AND Avicennia sp. Stapf ex Ridl (Acanthaceae) SEEDLINGS

2016

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-The mangrove ecosystem performs several natural functions of great ecological and economic importance. This study provided procedures for the recovery of mangrove ecosystems through the characterization of vegetation and zonation patterns and evaluation of growth and survival rates of mangrove species in an experimental plantation. The study was performed in the Acaraú River estuary mangrove on the western coast of Ceará State. The characterization of vegetation was conducted with the use of multiple plots and transects replication. Plants were identified at the species level, and their heights and CBH (circumference at breast height) were measured in each plot. Seedlings of the dominant mangrove species were produced using estuarine propagules. Five mangrove species were sampled: Rhizophora mangle, Avicennia germinans, Avicennia schaueriana, Laguncularia racemosa, and Conocarpus erectus. L. racemosa was the most dominant and frequent species, followed by A. germinas. A total of 111 L. racemosa and 102 Avicennia sp seedlings of were produced. Seedlings were viable for replanting within two months. The results of the analysis of vegetation structure and production and growth of seedlings are encouraging and demonstrate that revegetation is not only possible but also successful in this significantly deforested and degraded mangrove. 378Revista Árvore, Viçosa-MG, v.40, n.3, p.377-385, 2016 PAULA, A.L.S. et al.positivos, tanto na análise da estrutura vegetal, quanto à própria produção de mudas e ao sucesso do desenvolvimento e replantio, demonstrando que, mesmo este manguezal estando bastante desmatado e degradado é sim possível o sucesso do replantio.Palavras-chave: Estrutura vegetal; Plântulas; Plantio experimental.

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Differences in regeneration between hurricane damaged and clear-cut mangrove stands 25 years after clearing

Cited by 21 publications

References 18 publications

Mangrove Species Identification: Comparing WorldView-2 with Aerial Photographs

Mangrove Species Identification: Comparing WorldView-2 with Aerial Photographs

Local positive feedback and the persistence and recovery of fringe Avicennia marina (Forssk.) vierh. mangroves

THE RECOVERY OF A DEGRADED MANGROVE IN CEARÁ THROUGH THE PRODUCTION OF Laguncularia racemosa (L.) C.F. Gaertn. (Combretaceae) AND Avicennia sp. Stapf ex Ridl (Acanthaceae) SEEDLINGS

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